Android给自定义按键添加广播和通过广播给当前焦点输入框赋值

一、给自定义按键添加广播

修改PhoneWindowManager.java中的interceptKeyBeforeDispatching方法

/frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

     @Override
     public long interceptKeyBeforeDispatching(WindowState win, KeyEvent event, int policyFlags) {
         final boolean keyguardOn = keyguardOn();
         final int keyCode = event.getKeyCode();
         final int repeatCount = event.getRepeatCount();
         final int metaState = event.getMetaState();
         final int flags = event.getFlags();
         final boolean down = event.getAction() == KeyEvent.ACTION_DOWN;
         final boolean canceled = event.isCanceled();
         final boolean longPress = (flags & KeyEvent.FLAG_LONG_PRESS) != 0;
         final boolean virtualKey = event.getDeviceId() == KeyCharacterMap.VIRTUAL_KEYBOARD;
         final String isCitKeyTest=SystemProperties.get("persist.sys.startCitKeyTest");

         //添加自定义按键广播----开始
         switch (keyCode)
             {
                 case 135:
                 case 136:
                 case 137:
                 case 139:
                 {
                     if (repeatCount == 0) {

                         Intent myKeyIntent = new Intent();

                         if(down)
                         {
                             myKeyIntent.setAction("com.rscja.android.KEY_DOWN");
                         }
                         else
                         {
                             myKeyIntent.setAction("com.rscja.android.KEY_UP");
                         }

                         myKeyIntent.putExtra("keycode", keyCode);

                         mContext.sendBroadcastAsUser(myKeyIntent, UserHandle.ALL); 

                     }
                 }

                     break;
             }

             //添加自定义按键广播----结束

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 }

二、通过广播给当前焦点输入框赋值

修改InputMethodService.java中的onCreate()方法

/frameworks/base/core/java/android/inputmethodservice/InputMethodService.java

     @Override public void onCreate() {
         mTheme = Resources.selectSystemTheme(mTheme,
                 getApplicationInfo().targetSdkVersion,
                 android.R.style.Theme_InputMethod,
                 android.R.style.Theme_Holo_InputMethod,
                 android.R.style.Theme_DeviceDefault_InputMethod,
                 android.R.style.Theme_DeviceDefault_InputMethod);
         super.setTheme(mTheme);
         super.onCreate();
         mImm = (InputMethodManager)getSystemService(INPUT_METHOD_SERVICE);
         mInflater = (LayoutInflater)getSystemService(
                 Context.LAYOUT_INFLATER_SERVICE);
         mWindow = new SoftInputWindow(this, "InputMethod", mTheme, null, null, mDispatcherState,
                 WindowManager.LayoutParams.TYPE_INPUT_METHOD, Gravity.BOTTOM, false);
         if (mHardwareAccelerated) {
             mWindow.getWindow().addFlags(WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED);
         }
         initViews();
         mWindow.getWindow().setLayout(MATCH_PARENT, WRAP_CONTENT);

         //注册广播监听
         IntentFilter barCodeCheckFilter = new IntentFilter("com.rscja.android.DATA_RESULT");
         mRootView.getContext().registerReceiver(m_barCodeCheckReciever,barCodeCheckFilter);

     }

     //添加自定义广播
      private BroadcastReceiver m_barCodeCheckReciever = new  BroadcastReceiver () {

         @Override
         public void onReceive(Context context, Intent intent) {
         InputConnection conn = getCurrentInputConnection();

         String intent_data=intent.getStringExtra("data");

         if(intent_data.charAt(intent_data.length() - 1)=='\n')
         {
             if (conn != null) {
             conn.commitText(intent_data.substring(0,intent_data.length()-1), 1);
             }
             sendKeyChar('\n');
         }
         else
         {
             if (conn != null) {
                 conn.commitText(intent_data, 1);
                 }
             }
         }
     };