APP global monitoring system Home button

APP global monitoring system Home button

By customizing the Application, there is a registerActivityLifecycleCallbacks(ActivityLifecycleCallbacks a) method in the Application. To call this method, you need to override the life cycle method of the ActivityLifecycleCallbacks interface (this life cycle method includes the life cycle of all Activity), so in OnActivityResume() and OnActivityPause () method to monitor the Home key (registration and anti-registration system broadcast).

HomeWatch.java

Encapsulates the system broadcast of Home and implements the callback of the interface

public class HomeWatch {

    private Context mContext;
    private IntentFilter mFilter;
    private OnHomePressedListener mListener;
    private HomeBroadcastReceiver mRecevier;

    public interface OnHomePressedListener {
        void onHomePressed();

        void onHomeLongPressed();
    }

    public HomeWatch(Context context) {
        mContext = context;
        mRecevier = new HomeBroadcastReceiver();
        mFilter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
    }

    /**
     *  
     *
     * @param listener
     */
    public void setOnHomePressedListener(OnHomePressedListener listener) {
        mListener = listener;
    }

    /**
     *  ， 
     */
    public void register() {
        if (mRecevier != null) {
            mContext.registerReceiver(mRecevier, mFilter);
        }
    }

    /**
     *  ， 
     */
    public void unregister() {
        if (mRecevier != null) {
            mContext.unregisterReceiver(mRecevier);
        }
    }


    class HomeBroadcastReceiver extends BroadcastReceiver {

        final String SYSTEM_DIALOG_REASON_KEY = "reason";
        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) {
                    if (mListener != null) {
                        if (reason.equals(SYSTEM_DIALOG_REASON_HOME_KEY)) {
                            //  home 
                            mListener.onHomePressed();
                        } else if (reason
                                .equals(SYSTEM_DIALOG_REASON_RECENT_APPS)) {
                            //  home 
                            mListener.onHomeLongPressed();
                        }
                    }
                }
            }
        }
    }
}

APP.java

In order to avoid overriding too many methods in the APP, implement the Application.ActivityLifecycleCallbacks interface through a class

public class APP extends Application {
    private HomeWatch mHomeWatcher;

    @Override
    public void onCreate() {
        super.onCreate();

        regisiterActivityLifecycle();
    }

    private void regisiterActivityLifecycle() {
        registerActivityLifecycleCallbacks(new ActivityLifecycleCallBack() {

            @Override
            public void onActivityResumed(final Activity activity) {
                super.onActivityResumed(activity);
                mHomeWatcher = new HomeWatch(activity);
                mHomeWatcher.setOnHomePressedListener(new HomeWatch.OnHomePressedListener() {
                    @Override
                    public void onHomePressed() {
                       // 
                    }

                    @Override
                    public void onHomeLongPressed() {
                        // 
                    }
                });
                mHomeWatcher.register();
            }

            @Override
            public void onActivityPaused(Activity activity) {
                super.onActivityPaused(activity);
                mHomeWatcher.setOnHomePressedListener(null);
                mHomeWatcher.unregister();
            }

        });
    }
}

ActivityLifecycleCallBack.java

Customized a class that implements the interface of Application.ActivityLifecycleCallbacks

public class ActivityLifecycleCallBack implements Application.ActivityLifecycleCallbacks {

        @Override
        public void onActivityCreated(Activity activity, Bundle savedInstanceState) {

        }

        @Override
        public void onActivityStarted(Activity activity) {

        }

        @Override
        public void onActivityResumed(Activity activity) {

        }

        @Override
        public void onActivityPaused(Activity activity) {

        }

        @Override
        public void onActivityStopped(Activity activity) {

        }

        @Override
        public void onActivitySaveInstanceState(Activity activity, Bundle outState) {

        }

        @Override
        public void onActivityDestroyed(Activity activity) {

        }
    }

in AndroidManifest.xml

 ".APP"
        ...>