【代码】Android -- Activity 、Service、BroadcastReceiver 综合使用

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动态改变UI界面：

Activity：

public class MainActivity extends Activity implements OnClickListener {    private BroadcastReceiver br = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            int val = intent.getIntExtra("name", 0);            tv.setText(val + "");        }    };    private Button startbtn, stopbtn;    private TextView tv;    private Intent i;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        // 动态注册        registerReceiver(br, new IntentFilter("Action1"));        startbtn = (Button) findViewById(R.id.start);        stopbtn = (Button) findViewById(R.id.stop);        tv = (TextView) findViewById(R.id.tv);        startbtn.setOnClickListener(this);        stopbtn.setOnClickListener(this);        i = new Intent(MainActivity.this, MyService.class);    }    @Override    public void onClick(View v) {        switch (v.getId()) {        case R.id.start:            startService(i);            break;        case R.id.stop:            stopService(i);            break;        }    }    @Override    protected void onDestroy() {        super.onDestroy();        unregisterReceiver(br);// 取消注册    }}

Service：

public class MyService extends Service {    private Timer timer;    private TimerTask task;    private int j = 0;    @Override    public IBinder onBind(Intent intent) {        // TODO Auto-generated method stub        return null;    }    @Override    public void onCreate() {        // TODO Auto-generated method stub        super.onCreate();    }    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        startTimer();        return super.onStartCommand(intent, flags, startId);    }    @Override    public void onDestroy() {        stopTimer();        super.onDestroy();    }    public void startTimer() {        timer = new Timer();        task = new TimerTask() {            @Override            public void run() {                j++;                Intent i = new Intent();                i.setAction("Action1");                i.putExtra("name", j);                sendBroadcast(i);            }        };        timer.schedule(task, 1000, 1000);    }    public void stopTimer() {        timer.cancel();    }}

服务一定要记得在配置文件中注册，广播动态注册

运行结果：

本文介绍了Android -- Activity 、Service、BroadcastReceiver 的综合使用,希望本文对读者有所帮助,感谢阅读本文。更多安卓技术问题欢迎加群探讨：278744577，验证码:csl,不写验证不予通过哟~