如何使用runOnUiThread [英] how to use runOnUiThread

问题描述

我正在学习做一些UI线程，所以我写了简单的测试活动。但是我想我误解的东西，因为当我点击按钮 - 应用程序是不是resposing了

 公共类TestActivity延伸活动{

 按钮BTN;
 INT I = 0;

 @覆盖
 公共无效的onCreate（包savedInstanceState）{
     super.onCreate（savedInstanceState）;
     的setContentView（R.layout.main）;
     BTN =（按钮）findViewById（R.id.btn）;
     btn.setOnClickListener（新View.OnClickListener（）{
         @覆盖
         公共无效的onClick（视图v）{
             runThread（）;
         }
     }）;
 }

 私人无效runThread（）{
     runOnUiThread（新主题（新的Runnable（）{
         公共无效的run（）{
             而（我++其中，1000）{
                 btn.setText（＃+ I）;
                 尝试 {
                     视频下载（300）;
                 }
                 赶上（InterruptedException异常E）{
                     e.printStackTrace（）;
                 }
             }
         }
     }））;
}
}
 

解决方案

以下修正段 runThread 功能。

 私人无效runThread（）{

    新的Thread（）{
        公共无效的run（）{
            而（我++其中，1000）{
                尝试 {
                    runOnUiThread（新的Runnable（）{

                        @覆盖
                        公共无效的run（）{
                            btn.setText（＃+ I）;
                        }
                    }）;
                    视频下载（300）;
                }赶上（InterruptedException异常E）{
                    e.printStackTrace（）;
                }
            }
        }
    }。开始（）;
}
 

I'm learning to do something in UI-Thread, so I've written simple test activity. But I think I misunderstood something, because when I click on button - the app is not resposing anymore

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();
                 }
             }
         }
     }));
}
}

解决方案

Below is corrected Snippet of runThread Function.

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();
}

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