Android Open Source - workflow-android-view.and.data.api Async Get Thumbnail

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License

The source code is released under:

MIT License

Java Source Code

package async;
//from   w  w w  . j  a v  a2 s.com
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;

import main.MainActivity;
import services.RestServices;
import android.app.ProgressDialog;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Environment;
import android.widget.ImageView;
import android.widget.Toast;

import com.main.R;

public class AsyncGetThumbnail extends  AsyncTask<List<String>, Void, Void>{

  public MainActivity _activity;
  //indicate whether the task completed
    private Boolean _isOK = false;
    
    private Bitmap _bp = null;
    
  //ini progress dialog
    private ProgressDialog progress;
      public AsyncGetThumbnail(ProgressDialog progress) {
          this.progress = progress;
        }

        public void onPreExecute() {
          progress.show();
        } 
        
        
      public static Bitmap getLoacalBitmap(String url) {
           try {
                FileInputStream fis = new FileInputStream(url);
                return BitmapFactory.decodeStream(fis);
           } catch (FileNotFoundException e) {
                e.printStackTrace();
                return null;
           }
      }
      
    // task completed
    public void onPostExecute(Void unused) { 
      progress.dismiss();
      
      
      if(_isOK)
      {
        // show msg of succeess
         Toast.makeText(
            _activity.getApplicationContext(),
            "get thumbnail succeeded!",
          Toast.LENGTH_LONG).show(); 
          
         
         //tell the main activity to refresh
         _activity.setResult(20, null);
         
         
         //create the temp file to store the image of attachment
           File folder = new File(Environment.getExternalStorageDirectory(), 
               "ADNAndroidTestView");
           File toWrite = 
               new File(folder, "save.png");
           if(!toWrite.exists())
           {
               if(!folder.mkdirs())
          {
               
          }
            } 
        
         //produce the file stream for the bitmap
         FileOutputStream fos = null;
        try {
           fos = new FileOutputStream(toWrite);
           _bp.compress( CompressFormat.PNG, 100, fos );            
          fos.close(); 
          fos.flush();
        } catch (FileNotFoundException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
          return;
        } catch (IOException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
          return;
        }
      
       //Intent intent = new Intent();
      //intent.setAction(android.content.Intent.ACTION_VIEW);
      //intent.setDataAndType(Uri.fromFile(new File(toWrite.getPath())), "image/png");
      //_activity.startActivity(intent); 
        
         ImageView image1 = (ImageView) _activity.findViewById(R.id.imageView1);
         image1.setImageBitmap(_bp);
        

          
      }
      else
      {
        // show msg of failure
         Toast.makeText(
            _activity.getApplicationContext(),
            "Failed to get thumbnail",
          Toast.LENGTH_LONG).show();
      }
      
      // end login activity
      //return to main activity
     
      //_activity.finish();
    }
  @Override
  protected Void doInBackground(List<String>... params) {
    // TODO Auto-generated method stub
    _bp = RestServices.srv_get_bubble_thumb(params[0].get(0));
    if(_bp != null )   
     {         
       _isOK = true;
     }
     else
     {
       _isOK = false;
     }
     
    
    return null;
  }

}

Java Source Code List

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