Android將圖片從圖庫複製到新文件

我正在嘗試爲我的應用實現一項功能，該功能允許用戶從圖庫中爲某些提案選擇圖片。我需要在應用更改（過濾器，裁剪等）之前將此圖片保存爲新圖片。Android將圖片從圖庫複製到新文件

到目前爲止，我所做的：

private void pickImageFromGallery(){ 
    /*Intent intent = new Intent(Intent.ACTION_GET_CONTENT); 
    intent.setType("image/*"); 
    startActivityForResult(intent, GALLERY_SELECT_PICTURE);*/ 

    Intent getIntent = new Intent(Intent.ACTION_GET_CONTENT); 
    getIntent.setType("image/*"); 

    Intent pickIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
    pickIntent.setType("image/*"); 

    Intent chooserIntent = Intent.createChooser(getIntent, ""); 
    chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, new Intent[] {pickIntent}); 

    startActivityForResult(chooserIntent, GALLERY_SELECT_PICTURE); 
} 


@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 

    if(resultCode == RESULT_OK){ 
     if(requestCode == GALLERY_SELECT_PICTURE){ 
      if(data == null){ 
       //TODO SHOW ERROR 
       return; 
      } 
      try { 
       Bitmap temporaryBitmap = MediaStore.Images.Media.getBitmap(myContext.getContentResolver(), data.getData()); 

       //Tried using inputStream and got the same result 
       //InputStream inputStream = myContext.getContentResolver().openInputStream(data.getData()); 
       //Bitmap temporaryBitmap = BitmapFactory.decodeStream(inputStream, null, options); 

       //Just return a file to save the bitmap into (I use the same code in different activities and it works perfectly) 
       capturedImage = FunctionUtil.getOutputMediaFile(ConstUtil.ids.MEDIA_TYPE_IMAGE); 

       FileOutputStream outputStream = new FileOutputStream(capturedImage);; 
       temporaryBitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream); 

       //Just refresh the gallery so my new picture becomes available (I use the same function in different activities and it works fine) 
       FunctionUtil.refreshMediaGallery(capturedImage); 

      //HERE I CHECK THE PATH/GALLERY AND NOTICE THE FILE ISN'T SAVED 

      } catch (Exception e) { 
       e.printStackTrace(); 
       //TODO SHOW ERROR 
      } 

     }else if(requestCode == GALLERY_SELECT_VIDEO){ 

     } 
    } 
}

的代碼來獲得一個新的文件（FunctionUtil.getOutputMediaFile），代碼以刷新畫廊（FunctionUtil.refreshMediaGallery）和代碼來保存位圖（Bitmap.compress）在同一活動的不同部分可以正常工作，但帶有來自圖庫的圖片它只是不能保存它們！

當我使用相機API拍攝新照片然後解碼爲位圖時，它完美地工作，但當我從照片庫中選取圖片並解碼爲位圖時，它無法正常工作。

來源

2016-12-16 Jonathan Santos

使用此代碼

if(requestCode == GALLERY_SELECT_PICTURE){ 
     InputStream inputStream = getContentResolver() 
      .openInputStream(data.getData()); 
     FileOutputStream fileOutputStream = new FileOutputStream(
            outputFile); 
     copyStream(inputStream, fileOutputStream); 
     fileOutputStream.close(); 
     inputStream.close(); 
}

和

public static void copyStream(InputStream input, OutputStream output) 
      throws IOException { 

     byte[] buffer = new byte[1024]; 
     int bytesRead; 
     while ((bytesRead = input.read(buffer)) != -1) { 
      output.write(buffer, 0, bytesRead); 
     } 
    }

來源

2016-12-16 10:39:31 Qamar

Android將圖片從圖庫複製到新文件

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