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;
    }

}