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




……
……
……
……

}

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