Question

如何为最近的Apps Android设备按钮获取回叫侦听器，就像按“后退按钮”一样。我尝试了onKeyPress个事件，但是没有用。可以轻松找到“后退”按钮单击，但是如何检测最近的按钮单击？

我尝试了以下代码和许多其他代码：

@Override 
public boolean onKeyDown(int keyCode, KeyEvent event) {

    switch (keyCode) {
        case KeyEvent.KEYCODE_A:
        {
            //your Action code
            return true;
        }
    }

    return super.onKeyDown(keyCode, event);
}

Answer 1

是的，您可以使用 Action_Close_System_Dialog

来获取最近的按钮回调

只需在该类中使用单独的类名称Home-watcher

   public class HomeWatcher
 {
static final String TAG = "hg";
private Context mContext;
private OnHomePressedListener mListener;
private InnerReceiver mReceiver;

public HomeWatcher(Context context) {
    mContext = context;
}

public void setOnHomePressedListener(OnHomePressedListener listener) {
    mListener = listener;
    mReceiver = new InnerReceiver();
}

public void startWatch() {
    if (mReceiver != null) {
        mContext.registerReceiver(mReceiver, new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
    }
}

public void stopWatch() {
    if (mReceiver != null) {
        mContext.unregisterReceiver(mReceiver);
    }
}

private class InnerReceiver extends BroadcastReceiver
{
    final String SYSTEM_DIALOG_REASON_KEY = "reason";
    final String SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS = "globalactions";
    final String SYSTEM_DIALOG_REASON_RECENT_APPS = "recentapps";
    final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey";

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {
            String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY);
            if (reason != null) {
                Log.e(TAG, "action:" + action + ",reason:" + reason);
                if (mListener != null) {
                    if (reason.equals(SYSTEM_DIALOG_REASON_HOME_KEY)) {
                        mListener.onHomePressed();
                    } else if (reason.equals(SYSTEM_DIALOG_REASON_RECENT_APPS)) {
                        mListener.onHomeLongPressed();
                    }
                }
            }
        }
    }

    @Override
    public String toString() {
        return getClass().getSimpleName() + " " + super.toString();
    }
}

public interface OnHomePressedListener {
    void onHomePressed();
    void onHomeLongPressed();
}

}

从需要的类中调用函数

 mHomeWatcher = new HomeWatcher(this);
    mHomeWatcher.setOnHomePressedListener(new HomeWatcher.OnHomePressedListener() {
        @Override
        public void onHomePressed() {
            // do something here...
            Log.e("AHSAN", "onHomePressed: ");

            proceed();
        }

        @Override
        public void onHomeLongPressed() {
            Log.e("AHSAN", "onHomeLongPressed: ");

            proceed();

        }

Answer 2

如果您指的是“平方”按钮，则不能。仅onBackPressed事件可以被拦截。单击主页（圆圈）或最近使用的应用程序（正方形）将不会触发除onPause和onStop之外的任何其他事件。根据{{3}}。

Activity lifecycle

Android最近的设备按钮监听器

2 个答案: