AndroidApp实现应用内部自动更新的最基本方法示例

package majier.test; 
 
import java.io.File; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.InputStream; 
import java.net.HttpURLConnection; 
import java.net.MalformedURLException; 
import java.net.URL; 
import java.util.HashMap; 
 
import javax.xml.parsers.DocumentBuilder; 
import javax.xml.parsers.DocumentBuilderFactory; 
 
import org.w3c.dom.Document; 
import org.w3c.dom.Element; 
import org.w3c.dom.Node; 
import org.w3c.dom.NodeList; 
 
import android.app.AlertDialog; 
import android.app.Dialog; 
import android.app.AlertDialog.Builder; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.content.DialogInterface.OnClickListener; 
import android.content.pm.PackageManager.NameNotFoundException; 
import android.net.Uri; 
import android.os.Environment; 
import android.os.Handler; 
import android.os.Message; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.widget.ProgressBar; 
import android.widget.Toast; 
 
public class Update { 
  private static final int DOWNLOAD = 1; 
  private static final int DOWNLOAD_FINISH = 2; 
  private static final int CONNECT_FAILED = 0; 
  private static final int CONNECT_SUCCESS = 1; 
  HashMap mHashMap; 
  private String mSavePath; 
  private int progress; 
  private boolean cancelUpdate = false; 
  private Context mContext; 
  private ProgressBar mProgress; 
  private Dialog mDownloadDialog; 
  private String mXmlPath; // 服务器更新xml存放地址 
 
  public Update(Context context, String xmlPath, String savePath) { 
    this.mCOntext= context; 
    this.mXmlPath = xmlPath; 
    this.mSavePath = savePath; 
  } 
 
  private Handler mHandler = new Handler() { 
    public void handleMessage(Message msg) { 
      switch (msg.what) { 
      case DOWNLOAD: 
        mProgress.setProgress(progress); 
        break; 
      case DOWNLOAD_FINISH: 
        installApk(); 
        break; 
      default: 
        break; 
      } 
    }; 
  }; 
 
  /** 
   * 检查更新 
   */ 
  public void checkUpdate() { 
    new Thread(new Runnable() { 
      @Override 
      public void run() { 
        try { 
          URL url = new URL(mXmlPath); 
          HttpURLConnection cOnn= (HttpURLConnection) url 
              .openConnection(); 
          conn.setConnectTimeout(5000); 
          InputStream inStream = conn.getInputStream(); 
          mHashMap = parseXml(inStream); 
          Message msg = new Message(); 
          msg.what = CONNECT_SUCCESS; 
          handler.sendMessage(msg); 
        } catch (Exception e) { 
          Message msg = new Message(); 
          msg.what = CONNECT_FAILED; 
          handler.sendMessage(msg); 
        } 
      } 
    }).run(); 
  } 
 
  /** 
   * 访问服务器更新XML 
   */ 
  Handler handler = new Handler() { 
    @Override 
    public void handleMessage(Message msg) { 
      super.handleMessage(msg); 
      switch (msg.what) { 
      case CONNECT_FAILED: 
        Toast.makeText(mContext, "访问服务器失败！", Toast.LENGTH_SHORT).show(); 
        break; 
      case CONNECT_SUCCESS: 
        if (null != mHashMap) { 
          int serviceCode = Integer.valueOf(mHashMap.get("version")); 
          if (serviceCode > getVersionCode(mContext)) { 
            showNoticeDialog(); 
          } 
        } 
        break; 
      } 
    } 
  }; 
 
  /** 
   * 获取程序版本号 
   */ 
  private int getVersionCode(Context context) { 
    int versiOnCode= 0; 
    try { 
      versiOnCode= context.getPackageManager().getPackageInfo( 
          mContext.getPackageName(), 0).versionCode; 
    } catch (NameNotFoundException e) { 
      e.printStackTrace(); 
    } 
    return versionCode; 
  } 
 
  /** 
   * 是否更新提示窗口 
   */ 
  private void showNoticeDialog() { 
    AlertDialog.Builder builder = new Builder(mContext); 
    builder.setTitle("软件更新"); 
    builder.setMessage("检测到新版本，是否更新？"); 
    builder.setPositiveButton("更新", 
        new OnClickListener() { 
          @Override 
          public void onClick(DialogInterface dialog, int which) { 
            dialog.dismiss(); 
            showDownloadDialog(); 
          } 
        }); 
 
    builder.setNegativeButton("取消", 
        new OnClickListener() { 
          @Override 
          public void onClick(DialogInterface dialog, int which) { 
            dialog.dismiss(); 
          } 
        }); 
    Dialog noticeDialog = builder.create(); 
    noticeDialog.show(); 
  } 
 
  /** 
   * 下载等待窗口 
   */ 
  private void showDownloadDialog() { 
    AlertDialog.Builder builder = new Builder(mContext); 
    builder.setTitle("正在更新"); 
    final LayoutInflater inflater = LayoutInflater.from(mContext); 
    View v = inflater.inflate(R.layout.softupdate_progress, null); 
    mProgress = (ProgressBar) v.findViewById(R.id.update_progress); 
    builder.setView(v); 
    builder.setNegativeButton("取消下载", 
        new OnClickListener() { 
          @Override 
          public void onClick(DialogInterface dialog, int which) { 
            dialog.dismiss(); 
            cancelUpdate = true; 
          } 
        }); 
    mDownloadDialog = builder.create(); 
    mDownloadDialog.show(); 
    downloadApk(); 
  } 
 
  /** 
   * 涓嬭浇apk鏂囦欢 
   */ 
  private void downloadApk() { 
    new downloadApkThread().start(); 
  } 
 
  /** 
   * 下载程序 
   */ 
  private class downloadApkThread extends Thread { 
    @Override 
    public void run() { 
      try { 
        if (Environment.getExternalStorageState().equals( 
            Environment.MEDIA_MOUNTED)) { 
 
          URL url = new URL(mHashMap.get("url")); 
          HttpURLConnection cOnn= (HttpURLConnection) url 
              .openConnection(); 
          conn.connect(); 
          int length = conn.getContentLength(); 
          InputStream is = conn.getInputStream(); 
 
          File file = new File(mSavePath); 
          if (!file.exists()) { 
            file.mkdir(); 
          } 
          File apkFile = new File(mSavePath, mHashMap.get("name")); 
          FileOutputStream fos = new FileOutputStream(apkFile); 
          int count = 0; 
          byte buf[] = new byte[1024]; 
          do { 
            int numread = is.read(buf); 
            count += numread; 
            progress = (int) (((float) count / length) * 100); 
            mHandler.sendEmptyMessage(DOWNLOAD); 
            if (numread <= 0) { 
              mHandler.sendEmptyMessage(DOWNLOAD_FINISH); 
              break; 
            } 
 
            fos.write(buf, 0, numread); 
          } while (!cancelUpdate); 
          fos.close(); 
          is.close(); 
        } 
      } catch (MalformedURLException e) { 
        e.printStackTrace(); 
      } catch (IOException e) { 
        e.printStackTrace(); 
      } 
 
      mDownloadDialog.dismiss(); 
    } 
  }; 
   
  /** 
   * 安装apk 
   */ 
  private void installApk() { 
    File apkfile = new File(mSavePath, mHashMap.get("name")); 
    if (!apkfile.exists()) { 
      return; 
    } 
 
    Intent i = new Intent(Intent.ACTION_VIEW); 
    i.setDataAndType(Uri.parse("file://" + apkfile.toString()), 
        "application/vnd.android.package-archive"); 
    mContext.startActivity(i); 
  } 
 
  private HashMap parseXml(InputStream inStream) 
      throws Exception { 
    HashMap hashMap = new HashMap(); 
    // 实例化一个文档构建器工厂 
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); 
    // 通过文档构建器工厂获取一个文档构建器 
    DocumentBuilder builder = factory.newDocumentBuilder(); 
    // 通过文档通过文档构建器构建一个文档实例 
    Document document = builder.parse(inStream); 
    // 获取XML文件根节点 
    Element root = document.getDocumentElement(); 
    // 获得所有子节点 
    NodeList childNodes = root.getChildNodes(); 
    for (int j = 0; j 

package majier.test; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.os.Environment; 
 
public class AndroidUpdateTestActivity extends Activity { 
  /** Called when the activity is first created. */ 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    update(); 
  } 
   
  private void update() { 
    String sdpath = Environment.getExternalStorageDirectory() + "/"; 
    String mSavePath = sdpath + "boiler/"; 
    Update updateManager = new Update(this, 
        "http://localhost:8011/abcd.xml", mSavePath); 
    updateManager.checkUpdate(); 
  } 
} 

<&＃63;xml version="1.0" encoding="utf-8"&＃63;> 
 
 
   
 
 

<&＃63;xml version="1.0" encoding="utf-8"&＃63;> 
 
   
 

 
  12 
  BoilerAndroid_1.1 
  http://192.168.0.33:8011/boilerandroid.apk