在android中创建位图时内存不足

在android中创建位图时内存不足,android,bitmap,bitmapfactory,Android,Bitmap,Bitmapfactory,如何缩放此位图图像内存不足异常 Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); bitmap.setPixels(pixels, 0, width, 0, 0, width, height); return bitmap; 如何解决此问题? 下面的错误是我得到的 05-07 13:13:30.329:E/dalvikvm堆(17186):内存

如何缩放此位图图像内存不足异常

Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
            bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
            return bitmap;
如何解决此问题?
下面的错误是我得到的

05-07 13:13:30.329:E/dalvikvm堆(17186):内存不足 8294416字节分配。05-07 13:13:30.339:E/AndroidRuntime(17186): 致命异常:main 05-07 13:13:30.339:E/AndroidRuntime(17186): 进程:com.example,PID:17186 05-07 13:13:30.339: E/AndroidRuntime(17186):java.lang.OutOfMemoryError 05-07 13:13:30.339:E/AndroidRuntime(17186):在 android.graphics.Bitmap.nativeCreate(本机方法)05-07 13:13:30.339:E/AndroidRuntime(17186):在 android.graphics.Bitmap.createBitmap(Bitmap.java:819)05-07 13:13:30.339:E/AndroidRuntime(17186):在 android.graphics.Bitmap.createBitmap(Bitmap.java:796)05-07 13:13:30.339:E/AndroidRuntime(17186):在 android.graphics.Bitmap.createBitmap(Bitmap.java:763)05-07 13:13:30.339:E/AndroidRuntime(17186):在 com.example.QRCode.encodeAsBitmap(QRCode.java:135)


将该位图的缩小版本加载到内存中。做一个简短的谷歌调查将引导你做到这一点。 他们有以下示例代码:

public 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 decodeSampledBitmapFromResource(Resources res, int resId,
        int reqWidth, int reqHeight) {

    // First decode with inJustDecodeBounds=true to check dimensions
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeResource(res, resId, options);

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

    // Decode bitmap with inSampleSize set
    options.inJustDecodeBounds = false;
    return BitmapFactory.decodeResource(res, resId, options);
}

您可以尝试从位图中使用createScaledBitmap()方法,并且不要使用太大的图像……可能您的位图太大了。或者你可以试试,largeheap可能会有帮助,但是你应该让位图变小。在我的例子中,我不是从可绘制的文件夹生成qrcode