handler_1

Handler_1.java

public class ThreadHandlerTest extends Activity {
    TextView tvTest;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test);

        tvTest = (TextView) findViewById(R.id.tv_test);

        BackThread thread = new BackThread();
        thread.setDaemon(true); // 메인스레드와 같이 종료하기 위해서
        thread.start();
    }

    class BackThread extends Thread {
        @Override
        public void run() {
            val++;
            mHandler.sendEmptyMessage(0);
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    // 스레드간의 통신장치
    public Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            if (msg.what == 0) {
               tvTest.setText(val + "");
            }
        }
    };
}