Android在BroadcastReceiver中通过接口回调更新界面

之前写广播接收器都是写在Activity的内部的,觉得看起来很乱的感觉,毕竟广播也事和活动是同一级别的组件之一,哪儿能放在活动的里面啊,决定就来封装一下,发现居然没有思路,,同事说用静态类,直接点就可以了,

但是静态类在内存中不会被回收,只有等程序结束后才会回收,所以决定用接口回调接口回调在安卓中用的很多吧,这个不懂的可以自行搜索一下哈,就不普及基础了,

1. 新建一个接口UpdateUIListenner.class

public interface UpdateUIListenner {    /**     * 更新UI     */    void UpdateUI(String str);}
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1. 新建一个BroadcastReceiver取名 MyReceiver

public class MyReceiver extends BroadcastReceiver {    UpdateUIListenner updateUIListenner;    @Override    public void onReceive(Context context, Intent intent) {        String key = intent.getStringExtra("key");        updateUIListenner.UpdateUI(key);    }    /**     * 监听广播接收器的接收到的数据     * @param updateUIListenner     */    public void SetOnUpdateUIListenner(UpdateUIListenner updateUIListenner) {        this.updateUIListenner = updateUIListenner;    }}
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1. 在MainActivity里面

public class MainActivity extends AppCompatActivity {    MyReceiver myReceiver;    TextView tv1;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button btn = (Button) findViewById(R.id.btnSend);        tv1 = (TextView) findViewById(R.id.tv);        btn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                //发送广播                Intent intent = new Intent();                intent.putExtra("key", "数据数据");                intent.setAction("gengxin");                sendBroadcast(intent);                Log.e("+++++","发送广播");            }        });        //注册广播  ------接口回调不能使用静态注册,只能动态注册        myReceiver = new MyReceiver();        IntentFilter intentFilter = new IntentFilter();        intentFilter.addAction("gengxin");        registerReceiver(myReceiver, intentFilter);        myReceiver.SetOnUpdateUIListenner(new UpdateUIListenner() {            @Override            public void UpdateUI(String str) {                tv1.setText(str);            }        });    }    @Override    protected void onDestroy() {        super.onDestroy();        unregisterReceiver(myReceiver);    }
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源码下载(Android Studio)