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java - Android 最近的设备按钮监听器

问题描述

如何获取最近的 Apps Android 设备按钮的回调侦听器，就像按下后退按钮一样。我已经尝试过onKeyPress事件，但没有奏效。后退按钮点击很容易找到，但我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);
}

标签： javaandroidandroid-recents

解决方案

是的，您可以使用Action_Close_System_Dialog获取最近的按钮回调

只需使用这个类一个单独的类名 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();
}

}

从你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();

        }

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