BroadCastReceiver

在接受廣播的activity裏面註冊，並在Ondestroy 裏面接觸註冊；

1.動態註冊

public class  B extends Activity{

private Button button;

@Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_withdrawdetails);

        button = findViewById(R.id.button);

button.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

               sendBroadcast(new Intent("自己設置的antion字符串"));

            }

        });

    }

}

public class  A extends Activity{

    private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            finish();
        }
    };

     @Override
    protected void onResume() {
        super.onResume();
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction("自己設置的antion字符串”);
        registerReceiver(broadcastReceiver, intentFilter);
    }

    @Override

    protected void onDestroy() {

        super.onDestroy();

        unregisterReceiver(broadcastReceiver);

    }

}

2.靜態註冊：

public class  B extends Activity{

private Button button;

@Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_withdrawdetails);

        button = findViewById(R.id.button);

button.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

               sendBroadcast(new Intent("自己設置的antion字符串"));

            }

        });

    }

}

public class  A extends Activity{

private MyReceiver receiver ;

     @Override
    protected void onResume() {
        super.onResume();

        receiver = new MyReceiver();
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction("自己設置的antion字符串”);
        registerReceiver(receiver, intentFilter);
    }

    @Override

    protected void onDestroy() {

        super.onDestroy();

        unregisterReceiver(receiver);

    }

}

public class MyReceiver extends BroadcastReceiver {

    public MyReceiver() {

        super();

    }

    @Override

    public void onReceive(Context context, Intent intent) {

        if (context instanceof Activity) {

            ((Activity) context).finish();

        }

    }

}

manifest:

<receiver android:name="com.yjz.construct.receiver.MyReceiver" >

            <intent-filter>

                <action android:name="com.yjz.closeactivity" />

            </intent-filter>

        </receiver>