店面形象，從網址源碼越來越嚴重異常

Question

我嘗試store image to sqlite from url，如果我對connenction是好的，但如果fatal exception connention，我是真正使用設備

12-27 13:28:05.248: E/AndroidRuntime(29456): FATAL EXCEPTION: main 
12-27 13:28:05.248: E/AndroidRuntime(29456): java.lang.IllegalArgumentException: the bind value at index 2 is null 
12-27 13:28:05.248: E/AndroidRuntime(29456): at android.database.sqlite.SQLiteProgram.bindBlob(SQLiteProgram.java:259) 
12-27 13:28:05.248: E/AndroidRuntime(29456): at com.dbp.blob.MainActivity.Insert2DB(MainActivity.java:111) 
12-27 13:28:05.248: E/AndroidRuntime(29456): at com.dbp.blob.MainActivity$ak.onPostExecute(MainActivity.java:63) 
12-27 13:28:05.248: E/AndroidRuntime(29456): at com.dbp.blob.MainActivity$ak.onPostExecute(MainActivity.java:1) 
12-27 13:28:05.248: E/AndroidRuntime(29456): at android.os.AsyncTask.finish(AsyncTask.java:417) 
12-27 13:28:05.248: E/AndroidRuntime(29456): at android.os.AsyncTask.access$300(AsyncTask.java:127) 
12-27 13:28:05.248: E/AndroidRuntime(29456): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:429) 
12-27 13:28:05.248: E/AndroidRuntime(29456): at android.os.Handler.dispatchMessage(Handler.java:99) 

這是代碼

package com.dbp.blob; 

import java.io.BufferedInputStream; 
import java.io.InputStream; 
import java.net.URL; 
import java.net.URLConnection; 

import org.apache.http.util.ByteArrayBuffer; 

import android.app.Activity; 
import android.app.ProgressDialog; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteStatement; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.Window; 
import android.widget.ImageView; 

public class MainActivity extends Activity { 
    //url 
    private String IMAGEURL = "http://api.androidhive.info/json/movies/2.jpg"; 
    ImageView ivImg; 
    //methode 
    private byte[] logoImage, ImageBlob; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     requestWindowFeature(Window.FEATURE_NO_TITLE); 
     setContentView(R.layout.activity_main); 

     new ak().execute(); 

    } 
     class ak extends AsyncTask<String, String, String>{ 
      private ProgressDialog pDialog; 
      @Override 
       protected void onPreExecute() { 
       super.onPreExecute(); 
     ivImg = (ImageView) findViewById(R.id.imageView1); 


       pDialog = new ProgressDialog(MainActivity.this); 
       pDialog.setMessage("Getting Data ..."); 
       pDialog.setIndeterminate(false); 
       pDialog.setCancelable(true); 
       pDialog.show(); 
      } 
       protected String doInBackground(String... args) { 
        logoImage = getLogoImage(IMAGEURL); 

        // insert into DB 


        return null; 
      } 
       protected void onPostExecute(String convert){ 
        pDialog.dismiss(); 
        Insert2DB(); 
        // retrieve from DB 
        RetrieveImageFromDB(); 
        // Display Image 

        ivImg.setImageBitmap(getImage(ImageBlob));     

       } 

     } 


    //ambil logo 
    private byte[] getLogoImage(String url) { 
     try { 
      URL imageUrl = new URL(url); 
      URLConnection ucon = imageUrl.openConnection(); 

      InputStream is = ucon.getInputStream(); 
      BufferedInputStream bis = new BufferedInputStream(is); 

      ByteArrayBuffer baf = new ByteArrayBuffer(500); 
      int current = 0; 

      while ((current = bis.read()) != -1) { 
       baf.append((byte) current); 
      } 

      return baf.toByteArray(); 
     } catch (Exception e) { 
      Log.d("ImageManager", "Error: " + e.toString()); 
     } 
     return null; 
    } 

    //proses insert 
    public void Insert2DB() { 
     DatabaseHelper dbHelper = new DatabaseHelper(this); 
     SQLiteDatabase db = dbHelper.getWritableDatabase(); 

     String sql = "INSERT INTO PICTURES (pic_name,picture) VALUES(?,?)"; 
     SQLiteStatement insertStmt = db.compileStatement(sql); 
     insertStmt.clearBindings(); 
     insertStmt.bindString(1, "Image"); 
     insertStmt.bindBlob(2, logoImage); 
     insertStmt.executeInsert(); 
     db.close(); 
    } 

    //proses display 

    private void RetrieveImageFromDB() { 
     DatabaseHelper dbHelper = new DatabaseHelper(this); 
     SQLiteDatabase db = dbHelper.getWritableDatabase(); 
     String sql = "SELECT * FROM PICTURES"; 
     Cursor cursor = db.rawQuery(sql, new String[] {}); 

     if (cursor.moveToFirst()) { 
      @SuppressWarnings("unused") 
      String strName; 
      strName = cursor.getString(1); 

      //inisialisasi image 
      ImageBlob = cursor.getBlob(2); 
     } 
     cursor.close(); 
     db.close(); 
    } 

    //decode 
    public static Bitmap getImage(byte[] image) { 
     return BitmapFactory.decodeByteArray(image, 0, image.length); 
    } 

} 

Answer 1

Insert and retrieve ur image in doInBackground 

protected String doInBackground(String... args) { 
        logoImage = getLogoImage(IMAGEURL); 

        // insert into DB 
        Insert2DB(); 
        // retrieve from DB 
        RetrieveImageFromDB(); 
        return null; 
} 
    protected void onPostExecute(String convert){ 
        pDialog.dismiss(); 


        // Display Image 

        ivImg.setImageBitmap(getImage(ImageBlob));     

       } 
     }