5

我想将数据从 Bitmap 复制到int[]using getPixels()，这是我当前的代码：

int[] pixels = new int[myBitmap.getHeight() * myBitmap.getWidth()];
myBitmap.getPixels(pixels, 0, myBitmap.getWidth(), 0, 0,
        myBitmap.getHeight(), myBitmap.getWidth());

for(int i = 0; i < myBitmap.getHeight() * myBitmap.getWidth(); i++) {
    Log.e(TAG, "pixel"+i+"" +pixels[i]);
}

但它抛出了一个异常：

05-04 20:24:08.281: ERROR/AndroidRuntime(5700): Uncaught handler: thread main exiting due to uncaught exception
05-04 20:24:08.296: ERROR/AndroidRuntime(5700): java.lang.IllegalArgumentException: y + height must be <= bitmap.height()
05-04 20:24:08.296: ERROR/AndroidRuntime(5700):     at android.graphics.Bitmap.checkPixelsAccess(Bitmap.java:818)
05-04 20:24:08.296: ERROR/AndroidRuntime(5700):     at android.graphics.Bitmap.getPixels(Bitmap.java:771)
05-04 20:24:08.296: ERROR/AndroidRuntime(5700):     at com.tecmark.Jjilapp$TouchView.onDraw(Jjilapp.java:206)

有任何想法吗？我刚刚将 y 参数指定为 0。

4

2 回答 2

12

我认为这段代码中有一个错字。尝试这个：

myBitmap.getPixels(pixels, 0, myBitmap.getWidth(), 0, 0,
   myBitmap.getWidth(), myBitmap.getHeight());
于 2011-05-04T19:33:25.623 回答
10

你有你的宽度和高度切换。

myBitmap.getPixels(pixels, 0, myBitmap.getWidth(), 0, 0, myBitmap.getHeight(), myBitmap.getWidth());

对比

public void getPixels (int[] pixels, int offset, int stride, int x, int y, int width, int height) http://developer.android.com/reference/android/graphics/Bitmap.html#getPixels(int[], int, int, int, int, int, int)

于 2011-05-04T19:33:46.643 回答