java - Android:应用程序在上传图片时在设备上崩溃，java.lang.outofMemoryError

Question

在我的 android 应用程序中，我必须允许用户单击一个按钮来打开图库并选择图像。然后需要将该特定的选定图像加载到我的布局(UI)中的 ImageView 。我有一些代码，但它来自 java.lang.outofmemory。请有人能帮助我吗？

Answer 1

您应该在 onActivityResult() 方法上解码图像 uri。调用此方法解码Bitmap。

/**
     * This is very useful to overcome Memory waring issue while selecting image
     * from Gallery
     * 
     * @param selectedImage
     * @param context
     * @return Bitmap
     * @throws FileNotFoundException
     */
    public static Bitmap decodeBitmap(Uri selectedImage, Context context)
            throws FileNotFoundException {
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(context.getContentResolver()
                .openInputStream(selectedImage), null, o);

        final int REQUIRED_SIZE = 100;

        int width_tmp = o.outWidth, height_tmp = o.outHeight;
        int scale = 1;
        while (true) {
            if (width_tmp / 2 < REQUIRED_SIZE || height_tmp / 2 < REQUIRED_SIZE) {
                break;
            }
            width_tmp /= 2;
            height_tmp /= 2;
            scale *= 2;
        }

        BitmapFactory.Options o2 = new BitmapFactory.Options();
        o2.inSampleSize = scale;
        return BitmapFactory.decodeStream(context.getContentResolver()
                .openInputStream(selectedImage), null, o2);
    }

有关更多详细信息，请查看主题高效显示位图

http://developer.android.com/training/displaying-bitmaps/index.html

希望对您有所帮助。