A simple example of Android in ProgressDialog

Internet generally are an example of how the progress bar shows how close the end of the mandate is not an article, reference to other articles through the tests to set the progress bar shows a simple example is as follows:

The establishment of android and engineering work is omitted, Google click on it.

Here to introduce the main Activity

package com.lveyo.android.demo.progressbar;

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class ProgressBarDemo extends Activity {

        private TextView statusTextView;
        private Button beginBtn;
        private ProgressDialog progressDialog;

    public void onCreate(Bundle savedInstanceState) {
        statusTextView = (TextView)findViewById(R.id.status);
        beginBtn = (Button)findViewById(R.id.beginBtn);

     *  Used to update UI Handler
    private Handler handler = new Handler(){

                public void handleMessage(Message msg) {

                        // Close ProgressDialog

                        // Update the UI

         *  Click on the button event listener
    private void setListener(){
        beginBtn.setOnClickListener(new View.OnClickListener() {

                        public void onClick(View v) {

                                // Show ProgressDialog
                                progressDialog = ProgressDialog.show(ProgressBarDemo.this, "Loading...", "Please wait...", true, false);

                                // Create a new thread
                                new Thread(){

                                        public void run() {
                                                // Need to spend time calculation method

                                                // To send a message handler



package com.lveyo.android.demo.progressbar;

 *  Schematic method
 * @author lveyo
public class Calculation {

        public static void calculate(int sleepSeconds){
                try {
                        Thread.sleep(sleepSeconds * 1000);
                } catch (Exception e) {
                        // TODO: handle exception


main.xml file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
<TextView android:id="@+id/status"
<Button android:id="@+id/beginBtn"

In the android, usually we can not in a separate thread to update UI, but in the main thread, which is why we want to use Handler, and when the handler receive the message, it will put it into the queue waiting for the implementation of , generally speaking this will soon be executed.

A simple example of Android in ProgressDialog

分类:Mobile 时间:2010-03-29 人气:2213
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