Android的循环更新的TextView [英] Android loop update TextView

问题描述

我想创建一个循环，将更新一个TextView。
我们的想法是建立某种形式的进度指标，这将增加
装载precentge。

I am trying to create a loop that will update a TextView. The idea is to create some sort of progress indicator, that will increment the loading precentge.

这是我已经尽力了，但结果是，我只看到了循​​环的最后一次更新，所以我得到100％，没有incremntation。

This is what I have tried, but the result is that I see only the last update of the loop, so I get "100%" with no incremntation.

    runOnUiThread(new Runnable() {
                         public void run() {
                            final TextView progesss = (TextView)findViewById(R.id.progress);
                            for(int k=1 ; k<=100; k++)
                            {
                                progesss.setText(String.valueOf(k) + "%");

                                try {
                                    Thread.sleep(15);
                                    } catch(InterruptedException e) {
                                    } 
                            }
                         }
                     });

如何实现我的目标任何想法？
谢谢！

Any ideas of how to achieve my goal? Thanks!

推荐答案

您的Runnable 块的 UI线程的时做视频下载。相反睡觉，你应该再次发布了新的 Runnable接口。像这样尝试：

Your Runnable blocks the UI thread when doing Thread.sleep. Instead of sleeping, you should post a new Runnable again. Try with something like this:

final Handler handler = new Handler();
handler.post( new Runnable(){ 
    private int k = 0;

    public void run() {
        final TextView progess = (TextView)findViewById(R.id.progress);
        progess.setText(String.valueOf(k) + "%");

        k++;
        if( k <= 100 )
        {
            // Here `this` refers to the anonymous `Runnable`
            handler.postDelayed(this, 15);
        }
    }
});

这将使的 UI线程的一个机会，每次调用之间运行，让它做它的东西一样处理输入和屏幕上绘制的东西。

That will give the UI thread a chance to run between each call, letting it do its stuff like handling input and drawing stuff on the screen.

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