MediaStore.Images.Media.getBitmap和內存不足的錯誤

Question

我的代碼的代碼是：

public Bitmap loadPhoto(Uri uri) { 
    Bitmap scaled = null; 
    try { 
    scalled = Bitmap.createBitmap(
     MediaStore.Images.Media.getBitmap(getContentResolver(), uri), 
     0,0,90, 90); 

    if (scaled == null) { return null; } 
    } catch(Exception e) { } 
    return scaled; 
} 

在此之後。我在ImageView中縮放顯示。每個圖像都來自設備相機。

每當我從相機顯示三張照片後，我都會收到內存不足的內存錯誤。如何解決這個問題？

Answer 1

嘗試使用BitmapFactory來解決這個問題http://developer.android.com/reference/android/graphics/BitmapFactory.html

Answer 2

的MediaStore.getBitmap方法是獲得位圖時未指定的樣品大小的便捷方法。如果您使用的是getBitmap（ContentResolver，Uri），並且想要使用樣本大小，只需使用ContentResolver獲取輸入流，然後像平常一樣解碼位圖（首先計算樣本大小，然後使用適當的樣本大小）。

Answer 3

對於那些誰正在尋找的代碼示例：

private static int calculateInSampleSize(
     BitmapFactory.Options options, int reqWidth, int reqHeight) { 
    // Raw height and width of image 
    final int height = options.outHeight; 
    final int width = options.outWidth; 
    int inSampleSize = 1; 

    if (height > reqHeight || width > reqWidth) { 

     final int halfHeight = height/2; 
     final int halfWidth = width/2; 

     // Calculate the largest inSampleSize value that is a power of 2 and keeps both 
     // height and width larger than the requested height and width. 
     while ((halfHeight/inSampleSize) >= reqHeight 
       && (halfWidth/inSampleSize) >= reqWidth) { 
      inSampleSize *= 2; 
     } 
    } 

    return inSampleSize; 
} 

public static Bitmap decodeSampledBitmapFromUri(Context context, Uri imageUri, int reqWidth, int reqHeight) throws FileNotFoundException { 

    // Get input stream of the image 
    final BitmapFactory.Options options = new BitmapFactory.Options(); 
    InputStream iStream = context.getContentResolver().openInputStream(imageUri); 

    // First decode with inJustDecodeBounds=true to check dimensions 
    options.inJustDecodeBounds = true; 
    BitmapFactory.decodeStream(iStream, null, options); 

    // Calculate inSampleSize 
    options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight); 

    // Decode bitmap with inSampleSize set 
    options.inJustDecodeBounds = false; 
    return BitmapFactory.decodeStream(iStream, null, options); 
}