Android 最近的设备按钮侦听器

Question

如何为最近的应用 Android 设备按钮获取回调侦听器，就像按下后退按钮一样。我尝试了 onKeyPress 个事件，但没有成功。后退按钮点击很容易找到，但如何检测最近的按钮点击？

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

如果您指的是 "squared" 按钮，则不能。只能拦截 onBackPressed 事件。单击主页（圆圈）或最近使用的应用程序（方形）不会触发除 onPause 和 onStop 之外的任何其他事件。根据 Activity lifecycle.

Answer 2

是的，您可以使用 Action_Close_System_Dialog

获取最近的按钮回调

只需使用这个 class 一个单独的 class 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();
}

}

call the function from the class you need it

 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();

        }

Android 最近的设备按钮侦听器

Android recent device button Listener

java

android

android-recents