我们如何在Android中使用runOnUiThread？

我是Android新手,我正在尝试使用UI-Thread,所以我写了一个简单的测试活动.但我认为我误解了一些东西,因为点击按钮 – 应用程序不再响应

public class TestActivity extends Activity {

    Button btn;
    int i = 0;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btn = (Button)findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                runThread();
            }
        });
    }

    private void runThread(){
        runOnUiThread (new Thread(new Runnable() {  
            public void run() {
                while(i++ < 1000){
                    btn.setText("#"+i);
                    try {
                        Thread.sleep(300);
                    } 
                    catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
             }
        }));
    }
}

解决方法:

下面是更正了runThread函数的Snippet.

private void runThread() {

    new Thread() {
        public void run() {
            while (i++ < 1000) {
                try {
                    runOnUiThread(new Runnable() {

                        @Override
                        public void run() {
                            btn.setText("#" + i);
                        }
                    });
                    Thread.sleep(300);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }.start();
}

标签：ui-thread,android
来源： https://codeday.me/bug/20190911/1803138.html