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Android最新设备按钮监听器

android-recents android java

1

Muhammad Hassaan · 技术社区 · 6 年前

我怎样才能得到最近的应用程序Android设备按钮的回叫监听器,就像按后退按钮一样。我试过了 onKeyPress 但它不起作用。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);
}

2 回复 | 直到 6 年前

1

Ahsan Malik 6 年前

是的,您可以使用 操作关闭系统对话框

只需使用这个类的一个单独的类名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();

        }

2

0

Tiago Ornelas 6 年前

如果您的意思是“平方”按钮,则不能。只能截取onbackpressed事件。单击主页(圆形)或最近的应用程序(方形)不会触发除OnPause和OnStop以外的任何其他事件。根据活动生命周期

不触发OnPause和OnStop以外的任何其他事件。根据 Activity lifecycle .