BroadCastReceiver的动态注册方式.txt

步骤：
1、在MainAcvitity中新建一个内部类继承BroadCastReceiver
2、在MainAcvitity相关控件上添加发送广播的点击事件，在自定义内部类中接收广播
3.重写内部类的onStart和onStop方法，分别绑定动态加载的广播和解除广播

public class MainActivity extends AppCompatActivity {
    private Button btn_sendDync;
    private BroadCastDync bcd;//动态发送的广播类

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        bcd = new BroadCastDync();//在onCreate中实例化内部类
        btn_sendDync = (Button) findViewById(R.id.btn_sendDync);

//给相应控件添加点击事件
        btn_sendDync.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent1 = new Intent("com.work.boradcast.BroadCastDync");
                intent1.putExtra("dync", "动态广播已经发送");
                sendBroadcast(intent1);
            }
        });

    }
//自定义动态注册广播的内部类
    class BroadCastDync extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            String content = intent.getStringExtra("dync");
            btn_sendDync.setText(content);
        }
    }

    /**
     * 重写动态发送广播的onStart和onStop方法，绑定过滤器和解除绑定
     */
    @Override
    protected void onStart() {
        super.onStart();
        IntentFilter filter = new IntentFilter();
        filter.addAction("com.work.boradcast.BroadCastDync");
        registerReceiver(bcd, filter);//绑定过滤器
    }

    @Override
    protected void onStop() {
        super.onStop();
        unregisterReceiver(bcd);//解除动态广播的绑定
    }