import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.Uri;
import android.os.Environment;
import 
 
android.os.Handler;
import android.util.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
 
import org.apache.http.util.EntityUtils;
import org.json.JSONObject;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
public class UpdateInfoService {
   ProgressDialog progressDialog;
Handler handler;
Context context;
UpdateInfo updateInfo
 
;
   public UpdateInfoService(Context context){
      this.context=context;
}


   /*
   * 獲取更新資訊   * 版本資訊儲存在伺服器的update.txt檔案中   * 更新資訊包括:
   * 1、版本資訊   * 2、最新版本具體描述   * 3、下載地址   *
   * */
public UpdateInfo getUpDateInfo() throws Exception {
      HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet("http://localhost/index.php/API/Server/updateInfo");
HttpResponse httpResponse = httpClient.execute(httpGet);
UpdateInfo updateInfo = new UpdateInfo();
      if (httpResponse.getStatusLine().getStatusCode() == 200)//請求相應成功
{
         HttpEntity entity = httpResponse.getEntity();
String response = EntityUtils.toString(entity, "utf-8");
JSONObject jsonObject=new JSONObject(response);
Log.d("dsdsada", "getUpDateInfo: "+response);
updateInfo.setVersion(jsonObject.getString("version"));
updateInfo.setDescription(jsonObject.getString("description"));
updateInfo.setUrl(jsonObject.getString("url"));
         this.updateInfo = updateInfo;
         return updateInfo;
}
      updateInfo.setVersion("");
updateInfo.setDescription("");
updateInfo.setUrl("");
      this.updateInfo = updateInfo;
      return updateInfo;
}

   /*
    *判斷是否需要更新    */
public boolean isNeedUpdate(){
         String new_version = updateInfo.getVersion();
String now_version="";
         try {
            PackageManager packageManager = context.getPackageManager();
PackageInfo packageInfo = packageManager.getPackageInfo(
                  context.getPackageName(), 0);
now_version= packageInfo.versionName;
} catch (NameNotFoundException e) {
            e.printStackTrace();
}
         if (new_version.equals(now_version)) {
            return false;
} else {
            return true;
}
   }

   /*
   *
   * 下載檔案   * */
public void downLoadFile(final String url,final ProgressDialog pDialog,Handler h){
      progressDialog=pDialog;
handler=h;
      new Thread() {
         public void run() {        
            HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet(url);
HttpResponse response;
            try {
               response = client.execute(get);
HttpEntity entity = response.getEntity();
               int length = (int) entity.getContentLength();
progressDialog.setMax(length);
InputStream is = entity.getContent();
FileOutputStream fileOutputStream = null;
               if (is != null) {
                  File file = new File(
                        Environment.getExternalStorageDirectory(),
"Test.apk");
fileOutputStream = new FileOutputStream(file);
                        byte[] buf = new byte[10];   
                  int ch = -1;
                  int process = 0;
                  while ((ch = is.read(buf)) != -1) {       
                     fileOutputStream.write(buf, 0, ch);
process += ch;
progressDialog.setProgress(process);
}
               }
               fileOutputStream.flush();
               if (fileOutputStream != null) {
                  fileOutputStream.close();
}
               down();
} catch (ClientProtocolException e) {
               e.printStackTrace();
} catch (IOException e) {
               e.printStackTrace();
}
         }

      }.start();
}


   //下載完畢，退出下載，進入安裝APP步驟
void down() {
      handler.post(new Runnable() {
         public void run() {
            progressDialog.cancel();
update();
}
      });
}


   //安裝最新版本APP
void update() {
      Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(Environment
            .getExternalStorageDirectory(), "Test.apk")),
"application/vnd.android.package-archive");
context.startActivity(intent);
}

   
}