Android - 创建进度对话框

问题描述

我是安卓开发新手.我想在我的应用程序中开发一个带有 progressbar 的 dialog.当我单击搜索按钮时，dialog 应该与 progressbar 一起出现，显示在切换到另一个 activity 之前进度正在进行.请用示例代码向我推荐.

I am new to android development. I want to develop a dialog with a progressbar in my application. When i click the search button the dialog should appear with the progressbar, showing that the progress is going on before switching to another activity. Please suggest me with sample code.

推荐答案

使用 ProgressDialog.不过，您应该在一个新的 thread 上完成这项工作，并在完成后使用 handler 回调 activity.这是我的做法:

Use a ProgressDialog. You should do the work on a new thread, though, and use a handler to call back to the activity when finished. Here's how I do it:

private ProgressDialog pd;

private View.OnClickListener searchClick = new View.OnClickListener() {

    @Override
    public void onClick(View v) {
        pd = ProgressDialog.show(MyActivity.this, "Searching...", "Searching for matches", true, false);
        new Thread(new Runnable() {
                public void run() {
                    //do work
                //.....

                finishedHandler.sendEmptyMessage();
                }
            }).start();
    }
}

private Handler finishedHandler = new Handler() {
    @Override public void handleMessage(Message msg) {
        pd.dismiss();
        //start new activity
    }
}

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