dialog的进度条

 import android.app.Activity;

 import android.app.ProgressDialog;

 import android.os.Bundle;

 import android.view.Menu;

 import android.view.View;

 import android.widget.Button;

 public class MainActivity extends Activity {

     ProgressDialog dialog=null;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         Button btn=(Button) findViewById(R.id.btn);

         btn.setOnClickListener(new View.OnClickListener() {

         @Override

             public void onClick(View arg0) {

                 dialog=new ProgressDialog(MainActivity.this);

                 dialog.setMax(100);//设置最大值

                 dialog.setTitle("安装进度");

                 dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);//设置进度条样式，水平样式

                 dialog.show();//显示对话框

                 /*

                  * 定义一个线程，重写run（）方法

                  */

                 Thread thread=new Thread(){

                     public void run(){

                         while(true){

                             dialog.incrementProgressBy(1);//设置每次增加的进度

                             /**进度条的值超过100时，让进度条消失*/

                             if(dialog.getProgress()>=100){

                                 dialog.dismiss();

                             }

                             try {

                                 Thread.sleep(1000);

                             } catch (InterruptedException e) {

                                 e.printStackTrace();

                             }

                         }

                     }

                 };

                 thread.start();//启动线程

             }

         });

     }

     @Override

     public boolean onCreateOptionsMenu(Menu menu) {

         // Inflate the menu; this adds items to the action bar if it is present.

         getMenuInflater().inflate(R.menu.main, menu);

         return true;

     }

 }