feat: 发布4×4候选与Android手表应用内键盘组件

2026-11-14 13:55:53 +08:00
@@ -0,0 +1,9 @@
+plugins { id 'com.android.library' }
+android {
+    namespace 'com.sydxky.crabinput.keyboard'
+    compileSdk 37
+    defaultConfig { minSdk 27; consumerProguardFiles 'consumer-rules.pro' }
+    compileOptions { sourceCompatibility JavaVersion.VERSION_11; targetCompatibility JavaVersion.VERSION_11 }
+    lint { abortOnError true }
+}
+dependencies { testImplementation 'junit:junit:4.13.2' }
@@ -0,0 +1,3 @@
+# Public integration API. No reflection is required by the keyboard engine.
+-keep public class com.sydxky.crabinput.CrabKeyboard { public *; }
+-keep public class com.sydxky.crabinput.CrabKeyboard$Binding { public *; }
@@ -0,0 +1 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" />
@@ -0,0 +1,52 @@
+{
+  "keys": 104837,
+  "candidates": 163238,
+  "longest_word": 4,
+  "sha256": "fa01b1ab0264d8b271a32338b93a64b8670a71d57264c8586c89ae3cf3ddd8a2",
+  "bytes": 12644352,
+  "round_trip": true,
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+    "value19.dat": "ecfb7ba56450c671fc941d56556a42d508569e341c5dd2581b18a3d7d27ab55c",
+    "value2.dat": "d66703e7ac7ab6c2cd3b3c8109e656e1f78ace3e2bb49123ce3a2b3da4ca04d0",
+    "value20.dat": "896757081c224c72586dfa5babb4300c93639a27ba9a70eb34b9dfd5c23735f2",
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+    "value5.dat": "7b8a109e705537784a0a8075cc4fe3d1de8288a6b6b0240627685c81ed9695a9",
+    "value6.dat": "5b4028a017b228357446f799cd29b28dd5a24d63340f8b48ce858c75c64029f1",
+    "value7.dat": "b9f6e109ba5f1b5bca758613cb5cccfecf358915ce6415525c333b19515d6428",
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+    "value9.dat": "1c0caab370f1f14048ab6dd2da0011bedcddfed0ed0378b5c98171b6b22caf35"
+  },
+  "jieba_sha256": "7197c3211ddd98962b036cdf40324d1ea2bfaa12bd028e68faa70111a88e12a8"
+}
@@ -0,0 +1,23 @@
+MIT License
+
+Copyright (c) 2026 sydxky
+Copyright (c) 2026 kqakqakqa
+Copyright (c) 2026 crabKun
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
@@ -0,0 +1,17 @@
+# 蟹蟹输入 Android手表适配改版
+
+本项目由sydxky基于[CrabKeyboard / 蟹蟹输入](https://github.com/crabPangXie/crabKeyboard)的MIT词库重新实现Android应用内键盘组件、圆屏布局、九宫/14键消歧及候选分页。不是上游原版，也不表示上游作者或设备厂商对本改版作出背书。
+
+上游固定提交：`93d36b5002dee80a3d253b1ec7ec9e29800a104c`。保留原作者kqakqakqa、crabKun的版权声明和MIT许可证；原始词库位于同仓库RTOS目录。Android自研适配部分以[MIT许可证](./LICENSE)发布，**允许商用、修改、再分发和闭源集成**，须保留适用版权及许可全文。
+
+第三方内容继续按各自许可证使用：
+
+| 内容 | 作者/项目 | 许可与位置 |
+| --- | --- | --- |
+| CrabKeyboard V5词库 | kqakqakqa、crabKun | MIT，`keyboard/src/main/assets/licenses/crabKeyboard-LICENSE.txt` |
+| 本地候选排序词频 | jieba 0.42.1 / Sun Junyi | MIT，`keyboard/src/main/assets/licenses/jieba-LICENSE.txt` |
+| Gradle wrapper | Gradle | Apache-2.0，`keyboard/src/main/assets/licenses/Gradle-LICENSE.txt` |
+
+14键参考公开演示中的相邻字母分组，自行实现离线消歧；不包含华为内部模型或固件代码。Android SDK、JDK和构建工具不随源码分发，按各自许可使用。AndroidX及JUnit仅用于本地测试，不打入正式APK。
+
+公开仓库：<https://git2.sydxky.cn/sydxky/crab-input-rtos>。匿名问题与建议：<https://git2.sydxky.cn/feedback/sydxky/crab-input-rtos>。
@@ -0,0 +1,422 @@
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+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+org.slf4j:jcl-over-slf4j
+org.slf4j:jul-to-slf4j
+org.slf4j:log4j-over-slf4j
+org.slf4j:slf4j-api
+Copyright (c) 2004-2022 QOS.ch Sarl (Switzerland)
+All rights reserved.
+
+Permission is hereby granted, free  of charge, to any person obtaining
+a  copy  of this  software  and  associated  documentation files  (the
+"Software"), to  deal in  the Software without  restriction, including
+without limitation  the rights to  use, copy, modify,  merge, publish,
+distribute,  sublicense, and/or sell  copies of  the Software,  and to
+permit persons to whom the Software  is furnished to do so, subject to
+the following conditions:
+
+The  above  copyright  notice  and  this permission  notice  shall  be
+included in all copies or substantial portions of the Software.
+
+THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
+EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
+MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+------------------------------------------------------------------------------
+CDDL
+https://opensource.org/licenses/CDDL-1.0
+
+com.sun.xml.bind:jaxb-impl
+
+------------------------------------------------------------------------------
+LGPL 2.1
+https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
+
+org.samba.jcifs:jcifs
+
+org.jetbrains.intellij.deps:trove4j
+
+------------------------------------------------------------------------------
+License for the GNU Trove library included by the Kotlin embeddable compiler
+------------------------------------------------------------------------------
+The source code for GNU Trove is licensed under the Lesser GNU Public License (LGPL).
+
+    Copyright (c) 2001, Eric D. Friedman All Rights Reserved. This library is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or
+    (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
+    even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+    You should have received a copy of the GNU Lesser General Public License along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+
+Two classes (HashFunctions and PrimeFinder) included in Trove are licensed under the following terms:
+
+    Copyright (c) 1999 CERN - European Organization for Nuclear Research. Permission to use, copy, modify, distribute and sell this software
+    and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and
+    that both that copyright notice and this permission notice appear in supporting documentation. CERN makes no representations about the
+    suitability of this software for any purpose. It is provided "as is" without expressed or implied warranty.
+
+The source code of modified GNU Trove library is available at
+    https://github.com/JetBrains/intellij-deps-trove4j (with trove4j_changes.txt describing the changes)
+
+------------------------------------------------------------------------------
+Eclipse Distribution License 1.0
+https://www.eclipse.org/org/documents/edl-v10.php
+
+org.eclipse.jgit:org.eclipse.jgit
+
+------------------------------------------------------------------------------
+BSD-style
+
+com.jcraft:jzlib
+com.github.mwiede:jsch
+
+Copyright (c) 2002-2015 Atsuhiko Yamanaka, JCraft,Inc.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+  1. Redistributions of source code must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+
+  2. Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in
+     the documentation and/or other materials provided with the distribution.
+
+  3. The names of the authors may not be used to endorse or promote products
+     derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
+INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
+INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+------------------------------------------------------------------------------
+Eclipse Public License 2.0
+https://www.eclipse.org/legal/epl-2.0/
+
+org.junit.platform:junit-platform-launcher
+
+------------------------------------------------------------------------------
+Mozilla Public License 2.0
+https://www.mozilla.org/en-US/MPL/2.0/
+
+org.mozilla:rhino
@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) 2026 kqakqakqa
+Copyright (c) 2026 crabKun
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 Sun Junyi
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
@@ -0,0 +1,7 @@
+package com.sydxky.crabinput;
+
+public final class Candidate {
+    public final String word;
+    public final int consume;
+    public Candidate(String word, int consume) { this.word=word; this.consume=consume; }
+}
@@ -0,0 +1,37 @@
+package com.sydxky.crabinput;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/** 4 columns x 4 row units; long phrases get full width and extra row units. */
+public final class CandidatePager {
+    public static final class Cell {
+        public final Candidate candidate;
+        public final int span;
+        Cell(Candidate candidate,int span) { this.candidate=candidate; this.span=span; }
+    }
+    public static final class Row {
+        public final List<Cell> cells=new ArrayList<>();
+        public final int units;
+        public int slots;
+        Row(int units) { this.units=units; }
+    }
+    public static List<List<Row>> pages(List<Candidate> candidates) {
+        List<List<Row>> pages=new ArrayList<>();List<Row> page=new ArrayList<>();
+        Row row=null;int used=0;
+        for(Candidate candidate:candidates) {
+            int length=candidate.word.codePointCount(0,candidate.word.length());
+            int span=length==1?1:length<=4?2:4;
+            int units=span==4?Math.max(1,(length+11)/12):1;
+            if(row!=null&&(row.slots+span>4||row.units!=units)) { page.add(row);used+=row.units;row=null; }
+            if(used+units>4) { if(!page.isEmpty()) pages.add(page);page=new ArrayList<>();used=0; }
+            if(row==null) row=new Row(units);
+            row.cells.add(new Cell(candidate,span));row.slots+=span;
+            if(row.slots==4) { page.add(row);used+=row.units;row=null; }
+        }
+        if(row!=null)page.add(row);
+        if(!page.isEmpty())pages.add(page);
+        return pages;
+    }
+    private CandidatePager() {}
+}
@@ -0,0 +1,61 @@
+package com.sydxky.crabinput;
+
+import android.app.Activity;
+import android.app.Application;
+import android.app.Dialog;
+import android.os.Bundle;
+import android.text.Editable;
+import android.view.Gravity;
+import android.view.KeyEvent;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.Window;
+import android.view.WindowManager;
+import android.view.inputmethod.BaseInputConnection;
+import android.view.inputmethod.EditorInfo;
+import android.widget.EditText;
+
+/** Public AAR entry point. Works inside the host app; no system IME settings. */
+public final class CrabKeyboard {
+    public static Binding attach(Activity activity,EditText editor){return new Binding(activity,editor);}
+    public static final class Binding implements AutoCloseable,Application.ActivityLifecycleCallbacks {
+        private final Activity activity;
+        private final EditText editor;
+        private final boolean originalShowSoftInput;
+        private Dialog dialog;
+        private boolean closed;
+        private Binding(Activity activity,EditText editor){
+            if(android.os.Looper.myLooper()!=android.os.Looper.getMainLooper())throw new IllegalStateException("Attach on the UI thread");
+            this.activity=activity;this.editor=editor;originalShowSoftInput=editor.getShowSoftInputOnFocus();editor.setShowSoftInputOnFocus(false);
+            editor.setOnFocusChangeListener((view,focus)->{if(focus)show();});editor.setOnClickListener(view->show());activity.getApplication().registerActivityLifecycleCallbacks(this);
+        }
+        public void show(){
+            if(closed||dialog!=null||activity.isFinishing()||activity.isDestroyed())return;
+            if(editor.getSelectionStart()<0)editor.setSelection(editor.length());
+            EditorInfo info=new EditorInfo();info.inputType=editor.getInputType();info.imeOptions=editor.getImeOptions();
+            BaseInputConnection connection=new BaseInputConnection(editor,true){
+                @Override public Editable getEditable(){return editor.getText();}
+                @Override public boolean sendKeyEvent(KeyEvent event){return editor.dispatchKeyEvent(event);}
+                @Override public boolean performEditorAction(int actionCode){editor.onEditorAction(actionCode);return true;}
+            };
+            Dialog session=new Dialog(activity,android.R.style.Theme_Material_Light_NoActionBar);dialog=session;
+            KeyboardController controller=new KeyboardController(activity,connection,info,session::dismiss);
+            session.setOwnerActivity(activity);session.setContentView(controller.surface,new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,controller.surface.desiredHeight()));
+            Window window=session.getWindow();
+            if(window!=null){window.setBackgroundDrawableResource(android.R.color.transparent);window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);window.addFlags(WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);window.setGravity(Gravity.BOTTOM);
+                if(activity.getResources().getConfiguration().isScreenRound()){window.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN|View.SYSTEM_UI_FLAG_HIDE_NAVIGATION|View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);}}
+            session.setOnDismissListener(ignored->{controller.close();connection.closeConnection();if(dialog==session)dialog=null;});session.show();
+            if(window!=null)window.setLayout(ViewGroup.LayoutParams.MATCH_PARENT,activity.getResources().getConfiguration().isScreenRound()?ViewGroup.LayoutParams.MATCH_PARENT:ViewGroup.LayoutParams.WRAP_CONTENT);
+        }
+        public void dismiss(){if(dialog!=null)dialog.dismiss();}
+        @Override public void close(){if(closed)return;closed=true;dismiss();editor.setOnFocusChangeListener(null);editor.setOnClickListener(null);editor.setShowSoftInputOnFocus(originalShowSoftInput);activity.getApplication().unregisterActivityLifecycleCallbacks(this);}
+        @Override public void onActivityStopped(Activity value){if(value==activity)dismiss();}
+        @Override public void onActivityDestroyed(Activity value){if(value==activity)close();}
+        @Override public void onActivityCreated(Activity value,Bundle state){}
+        @Override public void onActivityStarted(Activity value){}
+        @Override public void onActivityResumed(Activity value){}
+        @Override public void onActivityPaused(Activity value){}
+        @Override public void onActivitySaveInstanceState(Activity value,Bundle state){}
+    }
+    private CrabKeyboard(){}
+}
@@ -0,0 +1,107 @@
+package com.sydxky.crabinput;
+
+import android.content.Context;
+import android.os.Handler;
+import android.os.Looper;
+import android.text.InputType;
+import android.view.KeyEvent;
+import android.view.inputmethod.EditorInfo;
+import android.view.inputmethod.InputConnection;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+
+/** One transient in-app editing session. It never selects a system IME. */
+final class KeyboardController implements KeyboardSurface.Actions,AutoCloseable {
+    private final Handler main=new Handler(Looper.getMainLooper());
+    private final ExecutorService worker=Executors.newSingleThreadExecutor();
+    final KeyboardState state=new KeyboardState();
+    final KeyboardSurface surface;
+    private final Lexicon lexicon;
+    private final InputConnection input;
+    private final EditorInfo info;
+    private final Runnable dismiss;
+    private final Context context;
+    private Future<?> pending;
+    private int revision;
+    private boolean active=true,repeat,closed;
+    private final Runnable lookup=()->query(revision,state.composition,state.mode);
+    private final Runnable deleteAgain=new Runnable(){@Override public void run(){if(repeat&&active){delete();main.postDelayed(this,115);}}};
+    @android.annotation.SuppressLint("WearPasswordInput") // Detect host password editors, no account login.
+    KeyboardController(Context context,InputConnection input,EditorInfo info,Runnable dismiss){
+        this.context=context;this.input=input;this.info=info;this.dismiss=dismiss;lexicon=new Lexicon(context);
+        int kind=info.inputType&InputType.TYPE_MASK_CLASS,variation=info.inputType&InputType.TYPE_MASK_VARIATION;
+        state.secret=kind==InputType.TYPE_CLASS_TEXT&&(variation==InputType.TYPE_TEXT_VARIATION_PASSWORD||variation==InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD||variation==InputType.TYPE_TEXT_VARIATION_WEB_PASSWORD)||kind==InputType.TYPE_CLASS_NUMBER&&variation==InputType.TYPE_NUMBER_VARIATION_PASSWORD;
+        state.mode=kind==InputType.TYPE_CLASS_NUMBER||kind==InputType.TYPE_CLASS_PHONE?"num":state.secret||variation==InputType.TYPE_TEXT_VARIATION_URI||variation==InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS?"en":"t9";
+        surface=new KeyboardSurface(context,state,this);refresh();
+    }
+    private void invalidateLookup(){revision++;main.removeCallbacks(lookup);if(pending!=null){pending.cancel(true);pending=null;}state.busy=false;}
+    private void refresh(){
+        if(active&&!state.secret){CharSequence text=input.getTextBeforeCursor(24,0);state.preview=text==null?"":text.toString();}else state.preview="";
+        if(!repeat)surface.refresh();
+    }
+    private void message(String text){state.message=text;android.widget.Toast.makeText(context,text,android.widget.Toast.LENGTH_SHORT).show();refresh();}
+    private boolean chinese(){return state.mode.equals("py")||state.mode.equals("t9")||state.mode.equals("14");}
+    private void schedule(){
+        invalidateLookup();state.page=0;state.candidates=new ArrayList<>();state.pages=new ArrayList<>();
+        if(!state.composition.isEmpty()&&active){state.busy=true;main.postDelayed(lookup,40);}refresh();
+    }
+    private void query(int owner,String composition,String mode){
+        pending=worker.submit(()->{
+            try {List<Candidate> result=lexicon.lookup(composition,mode);main.post(()->{if(!active||revision!=owner)return;state.candidates=result;state.pages=CandidatePager.pages(result);state.busy=false;state.message=result.isEmpty()?"暂无匹配，请退格修改":"离线输入";refresh();});}
+            catch(Exception ignored){main.post(()->{if(active&&revision==owner){state.busy=false;state.message="词库暂不可用，可切换英文";refresh();}});}
+        });
+    }
+    private void commit(String text){if(active)input.commitText(text,1);refresh();}
+    @Override public void choose(Candidate item){
+        if(!active||state.busy||state.composition.isEmpty()||!state.candidates.contains(item))return;
+        String remaining=state.composition.substring(Math.min(item.consume,state.composition.length()));
+        invalidateLookup();commit(item.word);state.composition=remaining;state.expanded=false;schedule();
+    }
+    private void delete(){
+        if(!active)return;
+        if(!state.composition.isEmpty()){state.composition=state.composition.substring(0,state.composition.length()-1);schedule();return;}
+        CharSequence selection=input.getSelectedText(0);if(selection!=null&&selection.length()>0)input.commitText("",1);else input.deleteSurroundingTextInCodePoints(1,0);refresh();
+    }
+    @Override public void repeatDelete(boolean start){boolean previous=repeat;main.removeCallbacks(deleteAgain);repeat=start&&active;if(repeat){delete();main.postDelayed(deleteAgain,450);}else if(previous)refresh();}
+    @Override public void action(String value){
+        if(!active)return;
+        if(value.startsWith("key:")){
+            String key=value.substring(4);
+            if(chinese()){if(state.composition.length()<32){state.composition+=key;schedule();}else message("每段最多32位");}else commit(key);return;
+        }
+        if(value.startsWith("mode:")){
+            String mode=value.substring(5);if(!state.composition.isEmpty()&&!mode.equals(state.mode)){message("请先选择候选词");return;}
+            if(mode.equals("en")&&state.mode.equals("en"))state.upper=!state.upper;
+            if(mode.equals("sym"))state.symbolPage=state.mode.equals("sym")?(state.symbolPage+1)%3:0;
+            state.mode=mode;state.expanded=false;state.tools=false;schedule();return;
+        }
+        switch(value){
+            case "delete":delete();return;
+            case "space":if(!state.composition.isEmpty()){if(!state.busy&&!state.candidates.isEmpty())choose(state.candidates.get(0));}else commit(" ");return;
+            case "expand":if(!state.candidates.isEmpty()){state.expanded=true;state.tools=false;state.page=0;}break;
+            case "previous":state.page=Math.max(0,state.page-1);break;
+            case "next":state.page=Math.min(Math.max(0,state.pages.size()-1),state.page+1);break;
+            case "back":state.expanded=false;state.tools=false;break;
+            case "tools":state.expanded=false;state.tools=true;break;
+            case "clear-composition":state.composition="";schedule();return;
+            case "hide":dismiss.run();return;
+            case "left":case "right":if(state.composition.isEmpty()){int key=value.equals("left")?KeyEvent.KEYCODE_DPAD_LEFT:KeyEvent.KEYCODE_DPAD_RIGHT;input.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN,key));input.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_UP,key));}break;
+            case "raw":if(state.mode.equals("py")&&!state.composition.isEmpty()){String text=state.composition;state.composition="";commit(text);schedule();}break;
+            case "newline":if(!state.secret&&(info.inputType&InputType.TYPE_TEXT_FLAG_MULTI_LINE)!=0)commit("\n");break;
+            case "done":
+                if(!state.composition.isEmpty()){message("请先选择候选词");state.expanded=false;break;}
+                int editorAction=info.imeOptions&EditorInfo.IME_MASK_ACTION;
+                if(editorAction!=EditorInfo.IME_ACTION_NONE&&editorAction!=EditorInfo.IME_ACTION_UNSPECIFIED)input.performEditorAction(editorAction);
+                dismiss.run();return;
+            default:break;
+        }
+        refresh();
+    }
+    @Override public void close(){
+        if(closed)return;closed=true;active=false;invalidateLookup();repeatDelete(false);main.removeCallbacksAndMessages(null);
+        state.composition="";state.preview="";state.candidates=new ArrayList<>();state.pages=new ArrayList<>();worker.execute(lexicon::close);worker.shutdown();
+    }
+}
@@ -0,0 +1,12 @@
+package com.sydxky.crabinput;
+
+import java.util.ArrayList;
+import java.util.List;
+
+final class KeyboardState {
+    String mode="t9",composition="",preview="",message="离线输入";
+    boolean expanded,tools,upper,secret,busy;
+    int page,symbolPage;
+    List<Candidate> candidates=new ArrayList<>();
+    List<List<CandidatePager.Row>> pages=new ArrayList<>();
+}
@@ -0,0 +1,175 @@
+package com.sydxky.crabinput;
+
+import android.content.Context;
+import android.content.res.ColorStateList;
+import android.graphics.Color;
+import android.graphics.Rect;
+import android.graphics.drawable.GradientDrawable;
+import android.graphics.drawable.RippleDrawable;
+import android.util.TypedValue;
+import android.view.Gravity;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.TextView;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+
+/** Native accessible buttons laid out within the actual round screen chord. */
+@android.annotation.SuppressLint("ViewConstructor") // Created by the IME, never inflated from XML.
+final class KeyboardSurface extends ViewGroup {
+    interface Actions { void action(String value);void choose(Candidate item);void repeatDelete(boolean start); }
+    private static final int BLUE=Color.rgb(40,103,217),INK=Color.rgb(32,35,43),MUTED=Color.rgb(132,139,151),BG=Color.rgb(236,238,242);
+    private final KeyboardState state;
+    private final Actions actions;
+    private final boolean round;
+    private final List<Placement> placements=new ArrayList<>();
+    private int builtWidth,builtHeight;
+    private float sx=1,sy=1;
+    private static final class Placement {
+        final View view;final Rect bounds;
+        Placement(View view,Rect bounds){this.view=view;this.bounds=bounds;}
+    }
+    KeyboardSurface(Context context,KeyboardState state,Actions actions) {
+        super(context);this.state=state;this.actions=actions;round=getResources().getConfiguration().isScreenRound();
+        setBackgroundColor(BG);setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES);setContentDescription("蟹蟹输入键盘");
+    }
+    int desiredHeight() {
+        android.util.DisplayMetrics dm=getResources().getDisplayMetrics();
+        boolean watch=round||(dm.heightPixels/(float)dm.widthPixels<1.35f);
+        return watch?dm.heightPixels:Math.min(dm.widthPixels,Math.round(dm.heightPixels*.46f));
+    }
+    void refresh() { if(builtWidth>0)build(builtWidth,builtHeight);requestLayout();invalidate(); }
+    private Rect bounds(float x,float y,float width,float height) {
+        return new Rect(Math.round(x*sx),Math.round(y*sy),Math.round((x+width)*sx),Math.round((y+height)*sy));
+    }
+    private float inset(float y,float height) {
+        if(!round)return 8;
+        float cy=builtHeight/2f,r=builtWidth/2f-7*sx;
+        float distance=Math.max(Math.abs(y*sy-cy),Math.abs((y+height)*sy-cy));
+        float half=(float)Math.sqrt(Math.max(0,r*r-distance*distance));
+        return Math.max(8,(builtWidth/2f-half)/sx+2);
+    }
+    private void place(View view,float x,float y,float width,float height) {
+        addView(view);placements.add(new Placement(view,bounds(x,y,width,height)));
+    }
+    private TextView label(String text,float font,int color) {
+        TextView view=new TextView(getContext());view.setText(text);view.setTextColor(color);view.setGravity(Gravity.CENTER);
+        view.setTextSize(TypedValue.COMPLEX_UNIT_PX,font*Math.min(sx,sy));view.setIncludeFontPadding(false);return view;
+    }
+    private Button button(String text,String description,float font,boolean primary,Runnable action) {
+        Button button=new Button(getContext());button.setText(text);button.setContentDescription(description);button.setAllCaps(false);
+        button.setGravity(Gravity.CENTER);button.setIncludeFontPadding(false);button.setMinHeight(0);button.setMinimumHeight(0);button.setMinWidth(0);button.setMinimumWidth(0);
+        button.setPadding(Math.round(3*sx),0,Math.round(3*sx),0);button.setTextSize(TypedValue.COMPLEX_UNIT_PX,font*Math.min(sx,sy));
+        button.setTextColor(primary?Color.WHITE:INK);button.setStateListAnimator(null);
+        GradientDrawable shape=new GradientDrawable();shape.setColor(primary?BLUE:Color.WHITE);shape.setCornerRadius(10*Math.min(sx,sy));
+        button.setBackground(new RippleDrawable(ColorStateList.valueOf(0x332867D9),shape,null));button.setOnClickListener(v->action.run());return button;
+    }
+    // Native Button click remains available to accessibility; touch deletion starts on down.
+    @android.annotation.SuppressLint("ClickableViewAccessibility")
+    private void action(String text,String value,float x,float y,float width,float height,float font,boolean primary) {
+        String name=value.equals("delete")?"删除":value.equals("done")?"完成":value.equals("hide")?"收起键盘":value.equals("expand")?"更多候选":value.equals("back")?"返回键盘":value.equals("previous")?"上一页":value.equals("next")?"下一页":text;
+        Button button=button(text,name,font,primary,()->actions.action(value));
+        if(value.equals("delete"))button.setOnTouchListener((v,event)->{
+            if(event.getActionMasked()==MotionEvent.ACTION_DOWN)actions.repeatDelete(true);
+            if(event.getActionMasked()==MotionEvent.ACTION_UP||event.getActionMasked()==MotionEvent.ACTION_CANCEL)actions.repeatDelete(false);
+            return true;
+        });
+        place(button,x,y,width,height);
+    }
+    private void row(String[] captions,String[] values,float y,float height,float font) {
+        float inset=inset(y,height),width=410-2*inset,cell=width/captions.length;
+        for(int i=0;i<captions.length;i++)action(captions[i],values[i],inset+i*cell+2,y,cell-4,height,font,false);
+    }
+    private void build(int width,int height) {
+        builtWidth=width;builtHeight=height;sx=width/410f;sy=height/410f;removeAllViews();placements.clear();
+        float top=round?28:7;
+        float headerInset=inset(top,23);
+        action("⌄","hide",headerInset,top,32,23,23,false);
+        String title=state.expanded?"完整候选":state.tools?"编辑工具":"蟹蟹输入";
+        place(label(title,14,MUTED),headerInset+34,top,410-2*headerInset-68,23);
+        action("编辑","tools",410-headerInset-32,top,32,23,10,false);
+        float previewY=top+29;
+        String preview=state.secret?"私密输入":state.preview.isEmpty()?"开始输入…":state.preview;
+        TextView previewView=label(preview,21,INK);previewView.setMaxLines(1);previewView.setEllipsize(android.text.TextUtils.TruncateAt.START);
+        float pi=inset(previewY,30);place(previewView,pi,previewY,410-2*pi,30);
+        if(state.expanded) { buildCandidates(previewY+38);return; }
+        if(state.tools) { buildTools(previewY+40);return; }
+        float compositionY=previewY+32;
+        String composition=state.composition;
+        if(state.mode.equals("14")) { StringBuilder display=new StringBuilder();for(char ch:composition.substring(Math.max(0,composition.length()-6)).toCharArray())display.append(Lexicon.GROUP14["0123456789abcd".indexOf(ch)].toUpperCase(Locale.ROOT)).append(' ');composition=display.toString(); }
+        TextView compose=label(composition.isEmpty()?modeName():composition,15,BLUE);compose.setMaxLines(1);
+        float ci=inset(compositionY,23);place(compose,ci,compositionY,410-2*ci,23);
+        float candidateY=compositionY+26;
+        if(isChinese()) {
+            float left=inset(candidateY,32),available=410-2*left;
+            int count=Math.min(3,state.candidates.size());float cell=(available-37)/Math.max(1,count);
+            for(int i=0;i<count;i++){Candidate item=state.candidates.get(i);Button b=button(item.word,item.word,22,false,()->actions.choose(item));b.setMaxLines(1);b.setAutoSizeTextTypeUniformWithConfiguration(10,22,1,TypedValue.COMPLEX_UNIT_PX);place(b,left+i*cell+2,candidateY,cell-4,32);}
+            if(count>0)action("⌄","expand",410-left-35,candidateY,33,32,24,false);
+            else place(label(state.busy?"正在查词…":state.message,12,MUTED),left,candidateY,available,32);
+        }
+        float keyY=candidateY+38;
+        String[][] captions,values;
+        switch(state.mode) {
+            case "t9":captions=new String[][]{{"标点","ABC","DEF"},{"GHI","JKL","MNO"},{"PQRS","TUV","WXYZ"}};values=new String[][]{{"mode:sym","key:2","key:3"},{"key:4","key:5","key:6"},{"key:7","key:8","key:9"}};break;
+            case "14":captions=new String[][]{{"QW","ER","TY","UI","OP"},{"AS","DF","GH","JK","L"},{"ZX","CV","BN","M"}};values=new String[][]{{"key:0","key:1","key:2","key:3","key:4"},{"key:5","key:6","key:7","key:8","key:9"},{"key:a","key:b","key:c","key:d"}};break;
+            case "num":captions=new String[][]{{"1","2","3"},{"4","5","6"},{"7","8","9"},{".","0","-"}};values=values(captions);break;
+            case "sym":String[] symbols={"，。？！：；","（）【】《》","、…·“”「", "!\"#$%&","'()*+,","-./:;<", "=>?@[\\","]^_`{|","}~€£¥°"};captions=new String[][]{split(symbols[state.symbolPage*3]),split(symbols[state.symbolPage*3+1]),split(symbols[state.symbolPage*3+2])};values=values(captions);break;
+            default:captions=new String[][]{split("qwertyuiop"),split("asdfghjkl"),split("zxcvbnm")};if(state.upper&&state.mode.equals("en"))for(String[] line:captions)for(int i=0;i<line.length;i++)line[i]=line[i].toUpperCase(Locale.ROOT);values=values(captions);
+        }
+        float keyHeight=captions.length==4?36:49;
+        // Hide an unused suggestion strip in direct entry modes to enlarge the keys.
+        if(!isChinese()){keyY-=27;keyHeight=captions.length==4?43:58;}
+        for(int i=0;i<captions.length;i++)row(captions[i],values[i],keyY+i*(keyHeight+4),keyHeight,captions[i].length>=7?21:24);
+        float modeY=keyY+captions.length*(keyHeight+4)+3;
+        row(new String[]{"九宫","26键","14键",state.upper?"ABC":"abc","123","符号"},new String[]{"mode:t9","mode:py","mode:14","mode:en","mode:num","mode:sym"},modeY,27,13);
+        bottom(modeY+34,false);
+    }
+    private void buildCandidates(float y) {
+        int count=state.pages.size();float safe=inset(y,18);
+        place(label(state.candidates.size()+" 项  ·  "+(state.page+1)+" / "+Math.max(1,count),12,MUTED),safe,y,410-2*safe,18);
+        float gridY=y+25;int unit=43;
+        if(count>0)for(CandidatePager.Row row:state.pages.get(state.page)) {
+            float rowHeight=row.units*unit-4,left=inset(gridY,rowHeight),cell=(410-2*left)/4;int slot=0;
+            for(CandidatePager.Cell entry:row.cells) {
+                Candidate item=entry.candidate;Button button=button(item.word,item.word,entry.span==1?25:entry.span==2?23:20,false,()->actions.choose(item));
+                button.setMaxLines(row.units*2);button.setEllipsize(null);
+                place(button,left+slot*cell+2,gridY,entry.span*cell-4,rowHeight);slot+=entry.span;
+            }
+            gridY+=row.units*unit;
+        }
+        float pagerY=y+25+4*unit+3;
+        row(new String[]{"‹","›"},new String[]{"previous","next"},pagerY,29,27);
+        bottom(pagerY+36,true);
+    }
+    private void buildTools(float y) {
+        row(new String[]{"← 光标","光标 →"},new String[]{"left","right"},y+7,37,18);
+        row(new String[]{"换行","拼音上屏"},new String[]{"newline","raw"},y+53,37,18);
+        row(new String[]{"清除拼音","空格"},new String[]{"clear-composition","space"},y+99,37,18);
+        place(label(state.secret?"私密输入 · 不学习、不保存":"完全离线 · 不采集输入内容",12,MUTED),45,y+150,320,26);
+        bottom(y+190,true);
+    }
+    private void bottom(float y,boolean back) {
+        float left=inset(y,34),cell=(410-2*left)/3;
+        action(back?"键盘":"空格",back?"back":"space",left+2,y,cell-4,34,17,false);
+        action("⌫","delete",left+cell+2,y,cell-4,34,25,false);
+        action("✓","done",left+2*cell+2,y,cell-4,34,23,true);
+        // Preview taps open cursor tools without taking an extra keyboard key.
+        for(Placement placement:placements)if(placement.view instanceof TextView&&!(placement.view instanceof Button)&&placement.view.getContentDescription()==null){if(((TextView)placement.view).getText().toString().equals(state.secret?"私密输入":state.preview.isEmpty()?"开始输入…":state.preview)){placement.view.setOnClickListener(v->actions.action("tools"));placement.view.setContentDescription("编辑光标");}}
+    }
+    private boolean isChinese(){return state.mode.equals("py")||state.mode.equals("t9")||state.mode.equals("14");}
+    private String modeName(){return state.mode.equals("py")?"26键全拼 · v 代表 ü":state.mode.equals("t9")?"九宫拼音":state.mode.equals("14")?"14键拼音":state.mode.equals("en")?"英文":state.mode.equals("sym")?"符号 · "+(state.symbolPage+1)+"/3 · 再点符号翻页":"数字";}
+    private static String[] split(String text){String[] result=new String[text.length()];for(int i=0;i<text.length();i++)result[i]=text.substring(i,i+1);return result;}
+    private static String[][] values(String[][] captions){String[][] result=new String[captions.length][];for(int i=0;i<captions.length;i++){result[i]=new String[captions[i].length];for(int j=0;j<result[i].length;j++)result[i][j]="key:"+captions[i][j];}return result;}
+    @Override protected void onMeasure(int widthSpec,int heightSpec) {
+        int width=MeasureSpec.getSize(widthSpec),height=resolveSize(desiredHeight(),heightSpec);
+        if(width!=builtWidth||height!=builtHeight)build(width,height);
+        for(Placement item:placements)item.view.measure(MeasureSpec.makeMeasureSpec(item.bounds.width(),MeasureSpec.EXACTLY),MeasureSpec.makeMeasureSpec(item.bounds.height(),MeasureSpec.EXACTLY));
+        setMeasuredDimension(width,height);
+    }
+    @Override protected void onLayout(boolean changed,int l,int t,int r,int b){for(Placement item:placements)item.view.layout(item.bounds.left,item.bounds.top,item.bounds.right,item.bounds.bottom);}
+    @Override public boolean dispatchTouchEvent(MotionEvent event){if(event.getActionMasked()==MotionEvent.ACTION_UP||event.getActionMasked()==MotionEvent.ACTION_CANCEL)actions.repeatDelete(false);return super.dispatchTouchEvent(event);}
+    @Override protected void onDetachedFromWindow(){actions.repeatDelete(false);super.onDetachedFromWindow();}
+}
@@ -0,0 +1,61 @@
+package com.sydxky.crabinput;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/** Full upstream dictionary, offline. Called only on the service's single worker. */
+public final class Lexicon implements AutoCloseable {
+    public static final String[] GROUP14={"qw","er","ty","ui","op","as","df","gh","jk","l","zx","cv","bn","m"};
+    public static final String[] GROUP9={"abc","def","ghi","jkl","mno","pqrs","tuv","wxyz"};
+    private final Context context;
+    private SQLiteDatabase db;
+    public Lexicon(Context context) { this.context=context.getApplicationContext(); }
+    public static String encode(String text,String mode) {
+        String[] groups=mode.equals("14")?GROUP14:GROUP9;String tokens=mode.equals("14")?"0123456789abcd":"23456789";
+        StringBuilder result=new StringBuilder();
+        for(char ch:text.toLowerCase(java.util.Locale.ROOT).toCharArray()) {
+            int index=-1;for(int i=0;i<groups.length;i++)if(groups[i].indexOf(ch)>=0){index=i;break;}
+            if(index<0)return "";result.append(tokens.charAt(index));
+        }
+        return result.toString();
+    }
+    private void open() throws Exception {
+        if(db!=null)return;
+        File directory=context.getNoBackupFilesDir();File target=new File(directory,"crab-v5-1.db");
+        if(!target.isFile()) {
+            File temporary=new File(directory,"crab-v5-1.tmp");
+            try(InputStream input=context.getAssets().open("dictionary.db");FileOutputStream output=new FileOutputStream(temporary)) {
+                byte[] buffer=new byte[32768];int length;while((length=input.read(buffer))!=-1)output.write(buffer,0,length);output.getFD().sync();
+            }
+            if(!temporary.renameTo(target))throw new java.io.IOException("Dictionary installation failed");
+        }
+        db=SQLiteDatabase.openDatabase(target.getPath(),null,SQLiteDatabase.OPEN_READONLY|SQLiteDatabase.NO_LOCALIZED_COLLATORS);
+    }
+    public List<Candidate> lookup(String input,String mode) throws Exception {
+        List<Candidate> result=new ArrayList<>();
+        String pattern=mode.equals("14")?"[0-9a-d]{1,32}":mode.equals("t9")?"[2-9]{1,32}":"[a-z]{1,32}";
+        if(!input.matches(pattern))return result;open();
+        String column=mode.equals("14")?"code14":mode.equals("t9")?"code9":"pinyin";
+        StringBuilder marks=new StringBuilder();String[] prefixes=new String[input.length()];
+        for(int i=0;i<input.length();i++){if(i>0)marks.append(',');marks.append('?');prefixes[i]=input.substring(0,i+1);}
+        String order=mode.equals("py")?"length(e.pinyin) DESC,e.pinyin,w.ordinal":"length(e.pinyin) DESC,w.frequency DESC,e.pinyin,w.ordinal";
+        Set<String> seen=new HashSet<>();
+        try(Cursor cursor=db.rawQuery("SELECT w.word,length(e.pinyin) FROM entries e JOIN words w ON w.entry=e.id WHERE e."+column+" IN ("+marks+") ORDER BY "+order,prefixes)) {
+            while(cursor.moveToNext()) {
+                if(Thread.currentThread().isInterrupted())return new ArrayList<>();
+                String word=cursor.getString(0);int consume=cursor.getInt(1);
+                if(seen.add(word+"@"+consume))result.add(new Candidate(word,consume));
+            }
+        }
+        return result;
+    }
+    @Override public void close() { if(db!=null){db.close();db=null;} }
+}
@@ -0,0 +1,26 @@
+package com.sydxky.crabinput;
+
+import org.junit.Test;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import static org.junit.Assert.*;
+
+public class CandidatePagerTest {
+    @Test public void singleCharactersFillSixteenCellsAndKeepAllResults(){
+        List<Candidate> input=new ArrayList<>();for(int i=0;i<90;i++)input.add(new Candidate(String.valueOf((char)(0x4E00+i)),3));
+        List<List<CandidatePager.Row>> pages=CandidatePager.pages(input);assertEquals(6,pages.size());assertEquals(4,pages.get(0).size());
+        List<Candidate> restored=new ArrayList<>();for(List<CandidatePager.Row> page:pages)for(CandidatePager.Row row:page)for(CandidatePager.Cell cell:row.cells)restored.add(cell.candidate);
+        assertEquals(input,restored);assertEquals(16,pages.get(0).stream().mapToInt(row->row.cells.size()).sum());
+    }
+    @Test public void phrasesUseWiderCellsAndLongPhrasesGetExtraRows(){
+        List<Candidate> input=Arrays.asList(new Candidate("你好",5),new Candidate("完整词组",4),new Candidate("长词组必须完整展示而不能省略任何文字",19),new Candidate("😀",1));
+        List<List<CandidatePager.Row>> pages=CandidatePager.pages(input);assertEquals(2,pages.get(0).get(0).cells.size());assertEquals(2,pages.get(0).get(0).cells.get(0).span);
+        assertEquals(2,pages.get(0).get(1).units);assertEquals(1,pages.get(0).get(2).cells.get(0).span);
+        for(List<CandidatePager.Row> page:pages)assertTrue(page.stream().mapToInt(row->row.units).sum()<=4);
+    }
+    @Test public void emptyListHasNoPhantomButtons(){assertTrue(CandidatePager.pages(new ArrayList<>()).isEmpty());}
+    @Test public void pairedAndT9MappingsCoverExpectedWords(){
+        assertEquals("c3754",Lexicon.encode("nihao","14"));assertEquals("64426",Lexicon.encode("nihao","t9"));assertEquals("",Lexicon.encode("a!","14"));
+    }
+}
				`@@ -0,0 +1 @@`
				`<manifest xmlns:android="http://schemas.android.com/apk/res/android" />`