Android_使用本地广播

本地广播很好的解决了全局广播的安全问题
在使用本地广播的时候也比较简单,只需要定义一个类就可以了,获取实例并不是new对象,而是从他内部提供的方法中获取实例,代码如下
代码也不是很难,和动态注册广播差不多,只是在进行相应的注册 解注册的时候都是使用LocalBroadcastManager的实例来操作

public class Main3Activity extends AppCompatActivity {    private Intent mIntent;    private Button mBtnSend;    private MyLocalReceiver mMyLocalReceiver;    private LocalBroadcastManager mLocalBroadcastManager;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main3);        mLocalBroadcastManager=LocalBroadcastManager.getInstance(this);    }    @Override    protected void onResume() {        super.onResume();        IntentFilter intentFilter=new IntentFilter();        intentFilter.addAction("chuang.meng");        mMyLocalReceiver=new MyLocalReceiver();        mLocalBroadcastManager.registerReceiver(mMyLocalReceiver,intentFilter);    }    @Override    protected void onDestroy() {        super.onDestroy();        mLocalBroadcastManager.unregisterReceiver(mMyLocalReceiver);    }    public void button1(View view) {        Intent intent=new Intent("chuang.meng");        mLocalBroadcastManager.sendBroadcast(intent);    }    class MyLocalReceiver extends BroadcastReceiver{        @Override        public void onReceive(Context context, Intent intent) {            Toast toast=Toast.makeText(context, "MyLocalReceiver is receiver",Toast.LENGTH_SHORT);            toast .setGravity(Gravity.CENTER,0,0);            toast.show();        }    }}