Android 子线程更新 UI

Android

功能：每秒使 TextView 显示内容 +1。

public class MainActivity extends Activity {
    private TextView textView;
    private Handler handler;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView = (TextView) findViewById(R.id.textView);
        handler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                super.handleMessage(msg);
                textView.setText((String) msg.obj);
            }
        };
        new Thread(new thread()).start();
    }
    // 每秒更新textview
    public class thread implements Runnable {
        public void run() {
            int c = 0;
            while (true) {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                // 将要更新的内容发给handler
                Message msg = new Message();
                msg.obj = "" + (c++);
                handler.sendMessage(msg);
            }
        }
    }
}