如何保存图库中的图像？

Question

我无法在任何地方看到图像。 没有编译错误或运行时错误。
我正在使用毕加索来获取图像。

public class DownloadImage extends Activity { 

ImageView imageView; 
private Button saveBtn; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    setContentView(R.layout.mindmaps); 

    imageView = (ImageView) findViewById(R.id.imageView); 
    saveBtn = (Button) findViewById(R.id.save); 
    final Bitmap bm = BitmapFactory.decodeResource(getResources(), R.id.imageView); 
    saveBtn.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      savePicture(bm, "image_name.jpg"); 
      Toast.makeText(getApplicationContext(), "Image saved...", Toast.LENGTH_SHORT).show(); 
     } 
    }); 



Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(imageView); 
} 


private void savePicture(Bitmap bm, String imgName) 
{ 
    OutputStream fOut = null; 
    String strDirectory = Environment.getExternalStorageDirectory().toString(); 

    File dir = new File(strDirectory, imgName); 
    dir.mkdir(); 
    try { 
     fOut = new FileOutputStream(dir); 

     /**Compress image**/ 
     bm.compress(Bitmap.CompressFormat.JPEG, 85, fOut); 
     fOut.flush(); 
     fOut.close(); 

     /** Update image to gallery **/ 
     MediaStore.Images.Media.insertImage(getContentResolver(), 
       dir.getAbsolutePath(), dir.getName(), dir.getName()); 
    } catch (Exception e) { 
     e.printStackTrace(); //exception 
    } 
    } 
} 

请检查是否有任何逻辑错误。 我只需要将图像视图中的图像保存到图库中。

Answer 1

尝试像这样...

private void savePicture(Bitmap bm, String imgName) 
    { 
     FileOutputStream fOut = null; 
     String strDirectory = Environment.getExternalStorageDirectory().toString(); 

     File dir = new File(strDirectory, imgName); 
     dir.mkdir(); 
     try { 
      dir.createNewFile(); 
      fOut = new FileOutputStream(dir); 

      /**Compress image**/ 
      bm.compress(Bitmap.CompressFormat.JPEG, 85, fOut); 



      /**Update image to gallery**/ 
      MediaStore.Images.Media.insertImage(getContentResolver(), 
        dir.getAbsolutePath(), dir.getName(), dir.getName()); 
      fOut.close(); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 

Answer 2

你应该解码成如下面的代码中使用位图图像，而不是ImageView的的。

`final Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.my_image);