Android ProgressBar的使用

最新推荐文章于 2025-06-30 15:59:47 发布

转载最新推荐文章于 2025-06-30 15:59:47 发布 · 115 阅读

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#移动开发

本文详细介绍了AndroidProgressBar的基本用法，并通过实例展示了如何利用线程实现进度条的动态更新。主要内容包括样式设置、自定义样式、创建线程进行定时更新以及通过Handler处理消息来控制进度条的显示和隐藏。

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Android 基础教程之-------Android ProgressBar的使用
http://blog.youkuaiyun.com/Android_Tutor/article/details/5695170

FAQ:

ProgressBar 样式？样式自定义？

// ProgressBar
protected static final int STOP = 0x10000;  
protected static final int NEXT = 0x10001;  

private int iCount = 0;

rectangleProgressBar.setVisibility(View.VISIBLE);  
circleProgressBar.setVisibility(View.VISIBLE);

rectangleProgressBar.setMax(100); 
rectangleProgressBar.setProgress(0);
circleProgressBar.setProgress(0);

//创建一个线程,每秒步长为5增加,到100%时停止
Thread mThread = new Thread(new Runnable() {
    public void run() {
        for (int i = 0; i < 20; i++) {
            try {

                iCount = (i + 1) * 5;
                Thread.sleep(1000);

                if (i == 19) {
                    Message msg = new Message();
                    msg.what = STOP;
                    mHandler.sendMessage(msg);
                    break;
                } else {
                    Message msg = new Message();
                    msg.what = NEXT;
                    mHandler.sendMessage(msg);
                }

            } catch (Exception e) {
                e.printStackTrace
            }
        }
    }
});

//定义一个Handler
private Handler mHandler = new Handler() {
    public void handleMessage(Message msg) {
        switch (msg.what) {
            case STOP:
                rectangleProgressBar.setVisibility(View.GONE);
                circleProgressBar.setVisibility(View.GONE);
                Thread.currentThread().interrupt();
                break;
                
            case NEXT:
                if (!Thread.currentThread().isInterrupted()) {
                    rectangleProgressBar.setProgress(iCount);
                    circleProgressBar.setProgress(iCount);
                }
        }
    }
}