ProgressDialog而负载活动 [英] ProgressDialog while load Activity

问题描述

我发现这个code在SO显示 ProgressDialog 而负载活动：

I found this code in SO to show ProgressDialog while load Activity:

progDailog = ProgressDialog.show(MyActivity.this, "Process", "please wait....", true, true);

new Thread(new Runnable() {
    public void run() {
        // code for load activity
}).start();

Handler progressHandler = new Handler() {
    public void handleMessage(Message msg1) {
        progDailog.dismiss();
    }
};

不过，我总是得到此异常：

But I always get this exception:

了java.lang.RuntimeException：无法内螺纹创建处理程序
  没有所谓的活套。prepare（）

java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()

我AP preciate针对此问题的任何帮助，先谢谢了。

I appreciate any help for this issue, thanks in advance.

推荐答案

下面是我会做什么：

的AsyncTask做背景的重活

AsyncTask to do the "heavy work" in background:

public class MyTask extends AsyncTask<String, String, String> {
private Context context;
private ProgressDialog progressDialog;

public MyTask(Context context) {
    this.context = context;
}

@Override
protected void onPreExecute() {
    progressDialog = new ProgressDialog(context);
    progressDialog.show();
}

@Override
protected String doInBackground(String... params) {
    //Do your loading here
    return "finish";
}


@Override
protected void onPostExecute(String result) {
    progressDialog.dismiss();
    //Start other Activity or do whatever you want
}

}

启动AsyncTask的：

Start the AsyncTask:

    MyTask myTask = new MyTask(this);
    myTask.execute("parameter");

当然，你可以改变的一般类型的AsyncTask来匹配你的问题。

Of course you can change the generic types of the AsyncTask to match your problems.

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