hander用法笔记

public class MainActivity extends AppCompatActivity {
    Timer timer = new Timer();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final Handler handler=new Handler(){
            @Override
            public void handleMessage(Message msg) {

                switch (msg.what) {
                    case 1:
                        setTitle("hear me?");
                        Toast.makeText(MainActivity.this,"wo shi handler",Toast.LENGTH_SHORT).show();
                        break;
                }
                super.handleMessage(msg);
            }
        };

        TimerTask task = new TimerTask(){
            public void run() {
                Message message = new Message();
                message.what = 1;
                handler.sendMessage(message);
            }
        };
        timer.schedule(task, 10000);



    };
}