Android - 加载中，请稍候
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Android - Loading, please wait
提问by nikib3ro
Is there a standard "Loading, please wait" dialog I can use in Android development, when I invoke some AsyncTask (downloading some data from remote service for example)?
当我调用一些 AsyncTask（例如从远程服务下载一些数据）时，我可以在 Android 开发中使用标准的“正在加载，请稍候”对话框吗？
回答by Mirko N.
You mean something like an indeterminate ProgressDialog?
你的意思是像一个不确定的ProgressDialog？
Edit: i.e.
编辑：即
ProgressDialog dialog = ProgressDialog.show(context, "Loading", "Please wait...", true);
then call dialog.dismiss()when done.
然后dialog.dismiss()完成后调用。
回答by Ally
If you implement runnable as well as extending Activity then you could handle the code like this...
如果您实现可运行以及扩展活动，那么您可以像这样处理代码......
private ProgressDialog pDialog;
public void downloadData() {
pDialog = ProgressDialog.show(this, "Downloading Data..", "Please wait", true,false);
Thread thread = new Thread(this);
thread.start();
}
public void run() {
// add downloading code here
handler.sendEmptyMessage(0);
}
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
pDialog().dismiss();
// handle the result here
}
};
It's worth mentioning that you can set the content view of the progress dialog so you can display a custom message / image:)
值得一提的是，您可以设置进度对话框的内容视图，以便您可以显示自定义消息/图像:)
pDialog.setContentView(R.layout.X);
回答by Dan Lew
Mirko is basically correct, however there are two things to note:
Mirko 基本上是正确的，但是有两点需要注意：
ProgressDialog.show()is a shortcut that automatically creates a dialog. Unlike other dialogs, it should NOT be used inonCreateDialog(), as it will cause errors in Android 1.5.There are some further issues with AsyncTask + ProgressDialog + screen orientation changes that you should be aware of - check this out.
ProgressDialog.show()是自动创建对话框的快捷方式。与其他对话框不同，它不应在 中使用onCreateDialog()，因为它会在 Android 1.5 中导致错误。您应该注意 AsyncTask + ProgressDialog + 屏幕方向更改还有一些其他问题 -检查一下。
