java - 无法检测长按

Question

我正在使用音量调高/调低按钮在 Activity 中导航。这工作正常，但我无法使用音量减小按钮开始下一个 Activity 。音量也同时增加/减少。这是代码

@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
 switch(keyCode){
     case KeyEvent.KEYCODE_VOLUME_DOWN:
         event.startTracking();
         //navigation


     return true;
     case KeyEvent.KEYCODE_VOLUME_UP:
         //navigation

     return true;
   }


   return super.onKeyUp(keyCode, event);
}

@Override
public boolean onKeyLongPress(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) {
        startActivity(new Intent("com.example.fittle.FISH"));
        return true;
    }
    return super.onKeyLongPress(keyCode, event);
}

Answer 1

尝试这个稍微修改过的方法:

@Override
public boolean onKeyLongPress(int keyCode, KeyEvent event) {
     super.onKeyLongPress(keyCode, event);
if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN)
{
    startActivity(new Intent("com.example.fittle.FISH"));
    return true;
}
return false;
}