android 进度对话框的使用

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;

public class MyActivityTest extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        final ProgressDialog progressDialog = new ProgressDialog(this);
        progressDialog.setTitle("提示");
        progressDialog.setMessage("正在加载....");
        progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        progressDialog.setMax(100);
        progressDialog.show();

        new Thread(new Runnable() {
            @Override
            public void run() {
                for (int i = 1; i <= 100; i++) {
                    progressDialog.setProgress(i);
                    try {
                        Thread.sleep(20);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                progressDialog.dismiss();
            }
        }).start();
    }
}