android > APK更新

package t1.com;



import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;

import org.apache.http.client.HttpClient;



import android.R.anim;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

public class T1Activity extends Activity {
    protected static final int UPDATA_CLIENT = 0;
	protected static final int CHECK_UPDATE = 1;
	protected static final int DOWN_ERROR = 0;
	/** Called when the activity is first created. */
    private int globalVersion = 3;
    private int serverVersion;
    private String serverVersionUrl = "http://cloud.broadlink.com.cn/2/switch_version.html";
    private String downLoadApkUrl = "http://cloud.broadlink.com.cn/2/t1.apk";
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
		  


       ////检测更新-------------------------
       new Thread(new Runnable() { 
            	public void run() { 
            			try {
							serverVersion = 33;
		                    Message msg = new Message();  
		                    msg.what = CHECK_UPDATE;  
		                    handler.sendMessage(msg);  
							
						} catch (NumberFormatException e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						} catch (Exception e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						}
    	        		
    				
            	 
            	} 
       }).start(); 
        
        
    } 
    
    
    
    public void showUpdateDialog() {

    	@SuppressWarnings("unused")

    	AlertDialog alert = new AlertDialog.Builder(T1Activity.this).setTitle("更新提示")
    	.setIcon(android.R.drawable.ic_dialog_info).setMessage("检测到新的版本，请下载更新").setPositiveButton("下载",new DialogInterface.OnClickListener() {

    	public void onClick(DialogInterface dialog,int which) {
    		dialog.dismiss();  //关闭对话框  
    		downLoadApk(); 
	    	System.out.println("start update");

    	}

    	}).show();

    }
    
    protected void downLoadApk() {  
        final ProgressDialog pd;    //进度条对话框  
        pd = new  ProgressDialog(this);  
        pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);  
        pd.setMessage("正在下载更新");  
        pd.show();  
        new Thread(){  
            @Override  
            public void run() {  
                try {  
                    File file = getFileFromServer(downLoadApkUrl, pd);  
                    sleep(3000);  
                    installApk(file);  
                    pd.dismiss(); //结束掉进度条对话框  
                } catch (Exception e) {  
                	pd.dismiss();
                    Message msg = new Message();  
                    msg.what = DOWN_ERROR;  
                    handler.sendMessage(msg);  
                    e.printStackTrace();  
                }  
            }}.start();  
    }  
    public static File getFileFromServer(String path, ProgressDialog pd) throws Exception{  
        //如果相等的话表示当前的sdcard挂载在手机上并且是可用的  
        if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){  
            URL url = new URL(path);  
            HttpURLConnection conn =  (HttpURLConnection) url.openConnection();  
            conn.setConnectTimeout(5000);  
            //获取到文件的大小   
            pd.setMax(conn.getContentLength());  
            InputStream is = conn.getInputStream();  
            File file = new File(Environment.getExternalStorageDirectory(), "updata.apk");  
            FileOutputStream fos = new FileOutputStream(file);  
            BufferedInputStream bis = new BufferedInputStream(is);  
            byte[] buffer = new byte[1024];  
            int len ;  
            int total=0;  
            while((len =bis.read(buffer))!=-1){  
                fos.write(buffer, 0, len);  
                total+= len;  
                //获取当前下载量  
                pd.setProgress(total);  
            }  
            fos.close();  
            bis.close();  
            is.close();  
            return file;  
        }  
        else{  
            return null;  
        }  
    } 
  //安装apk   
    protected void installApk(File file) {  
        Intent intent = new Intent();  
        //执行动作  
        intent.setAction(Intent.ACTION_VIEW);  
        //执行的数据类型  
        intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");  
        startActivity(intent);  
    } 
    
    Handler handler = new Handler(){  
        
        @Override  
        public void handleMessage(Message msg) {  
            // TODO Auto-generated method stub  
            super.handleMessage(msg);  
            switch (msg.what) {   
            case DOWN_ERROR:  
                //下载apk失败  
                Toast.makeText(getApplicationContext(), "下载新版本失败", 1).show();  
                break;    
            case CHECK_UPDATE:  
                //下载apk失败  
            	 
                
                if(serverVersion == 0) {
                	serverVersion = globalVersion;
                }
                
                if(serverVersion != globalVersion){
                	showUpdateDialog();	
                } 
                break; 
            }  
        }  
    }; 
    
}