Android的例外 - 外部分配太大，这一过程 [英] Android exception - External allocation too large for this process

问题描述

我有以下code：

 私人位图mBitmap;
私人帆布mCanvas;
私人路径的mpath;
私人涂料mBitmapPaint;
mBitmap = Bitmap.createBitmap（480，800，Bitmap.Config.ARGB_8888）;
mCanvas =新的Canvas（mBitmap）;的mpath =新路径（）;
mBitmapPaint =新的油漆（Paint.DITHER_FLAG）;保护无效的onDraw（帆布油画）{canvas.drawBitmap（mBitmap，0，0，mBitmapPaint）;
canvas.drawPath（的mpath，mRealPaint）;
}
 

当我运行它，它运行罚款几页。几张照片完成后，然后就强制关闭给以下异常：

  E / GraphicsJNI（493）：虚拟机不会让我们分配921600字节
D / AndroidRuntime（493）：关闭VM
W / dalvikvm（493）：主题ID = 1：螺纹未捕获的异常退出（组= 0x4001d800）
E / AndroidRuntime（493）：致命异常：主要
E / AndroidRuntime（493）：java.lang.OutOfMemoryError：位图大小超过VM预算
 

我看了关于这一主题的许多职位。更新的大型堆为真，但它仍然没有工作。有人可以帮我告诉我究竟做错了什么？

更多的错误：

  W / WebCore的（541）：第一个布局后无法获得viewWidth
D / webviewglue（541）：nativeDestroy观点：0x40a7b8
I /广告（541）：onReceiveAd（）
D / dalvikvm（541）：GC_EXTERNAL_ALLOC 1943年释放的对象/在227ms 219448字节
D / dalvikvm（541）：GC_EXTERNAL_ALLOC释放707对象/在159ms 100576字节
E / ActivityThread（541）：未能找到com.google.plus.platform供应商信息
 

解决方案

请尝试以下code： -

 公共静态位图createScaledBitmap（位图SRC，诠释dstWidth，
        INT dstHeight，布尔型过滤器）{
    矩阵m;
    同步（Bitmap.class）{
        仅1矩阵//小水池
        M = sScaleMatrix;
        sScaleMatrix = NULL;
    }    如果（M == NULL）{
        M =新的Matrix（）;
    }    最终诠释宽度= src.getWidth（）;
    最终诠释身高= src.getHeight（）;
    最终浮动SX = dstWidth /（浮点）宽度;
    最终浮动SY = dstHeight /（浮点）高度;
    m.setScale（SX，SY）;
    位图B = Bitmap.createBitmap（源，0，0，宽度，高度，M滤波器）;    同步（Bitmap.class）{
        //我们需要检查空？为什么不只是每次分配？
        如果（sScaleMatrix == NULL）{
            sScaleMatrix =米;
        }
    }    返回b;
}
 

src是位图

I have following code:

private Bitmap  mBitmap;
private Canvas  mCanvas;
private Path    mPath;
private Paint   mBitmapPaint;


mBitmap = Bitmap.createBitmap(480, 800, Bitmap.Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);

mPath = new Path();
mBitmapPaint = new Paint(Paint.DITHER_FLAG);

protected void onDraw(Canvas canvas) {

canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
canvas.drawPath(mPath, mRealPaint);
}

When i run it, it runs fine for few pages. Then after few pictures are done it force closes giving following exception:

E/GraphicsJNI(493): VM won't let us allocate 921600 bytes
D/AndroidRuntime(493): Shutting down VM
W/dalvikvm(493): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
E/AndroidRuntime(493): FATAL EXCEPTION: main
E/AndroidRuntime(493): java.lang.OutOfMemoryError: bitmap size exceeds VM budget

I read many posts on this topic. Updated Large heap to true, but it is still not working. Can someone please help me tell what am i doing wrong here?

More errors:

W/webcore(541): Can't get the viewWidth after the first layout
D/webviewglue(541): nativeDestroy view: 0x40a7b8
I/Ads(541): onReceiveAd()
D/dalvikvm(541): GC_EXTERNAL_ALLOC freed 1943 objects / 219448 bytes in 227ms
D/dalvikvm(541): GC_EXTERNAL_ALLOC freed 707 objects / 100576 bytes in 159ms
E/ActivityThread(541): Failed to find provider info for com.google.plus.platform

解决方案

try the following code :-

public static Bitmap createScaledBitmap(Bitmap src, int dstWidth,
        int dstHeight, boolean filter) {
    Matrix m;
    synchronized (Bitmap.class) {
        // small pool of just 1 matrix
        m = sScaleMatrix;
        sScaleMatrix = null;
    }

    if (m == null) {
        m = new Matrix();
    }

    final int width = src.getWidth();
    final int height = src.getHeight();
    final float sx = dstWidth  / (float)width;
    final float sy = dstHeight / (float)height;
    m.setScale(sx, sy);
    Bitmap b = Bitmap.createBitmap(src, 0, 0, width, height, m, filter);

    synchronized (Bitmap.class) {
        // do we need to check for null? why not just assign everytime?
        if (sScaleMatrix == null) {
            sScaleMatrix = m;
        }
    }

    return b;
}

src will be your bitmap

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