Android中监控home键

一、需求

在应用开发过程中，启动服务开启线程锁等待服务返回解锁，为了避免点击home键使线程锁卡死的bug，需要监控home键，解锁线程。

二、实现

在应用时，需要register和unregister。

public class HomeWatcherReceiver extends BroadcastReceiver {    private static final String SYSTEM_DIALOG_REASON_KEY = "reason";    private static final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey";    private OnKeyListener listener;

@Override    public void onReceive(Context context, Intent intent) {

String intentAction = intent.getAction();        if (TextUtils.equals(intentAction, Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {            String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY);            if (TextUtils.equals(SYSTEM_DIALOG_REASON_HOME_KEY, reason)) {                listener.onHomeKey();            }        }    }

public void registerHomeKeyReceiver(Context context) {        IntentFilter homeFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);        context.registerReceiver(this, homeFilter);    }

public void unregisterHomeKeyReceiver(Context context) {        context.unregisterReceiver(this);    }

public void setListener(OnKeyListener listener) {        this.listener = listener;    }

@FunctionalInterface    public interface OnKeyListener {        void onHomeKey();    }}