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

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