我正在使用以下代码
public void cropSelection(){
Bitmap bitmap = annotationBitmap.copy(annotationBitmap.getConfig(), true);
Canvas canvas = new Canvas(bitmap);
Paint p = new Paint();
// p.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.XOR));
canvas.drawBitmap(imageBitmap, 0, 0, p); // this line throws error
imageBitmap = bitmap;
}
更令人惊讶的是，当我使用同一条线时canvas.drawBitmap(imageBitmap, 0, 0, p) inside onDraw()它不会抛出任何错误。效果很好。
堆栈跟踪
2020-01-17 11:20:07.815 21388-21388/com.mayank.picturemagic E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.mayank.picturemagic, PID: 21388
java.lang.IllegalArgumentException: Software rendering doesn't support hardware bitmaps
at android.graphics.BaseCanvas.onHwBitmapInSwMode(BaseCanvas.java:550)
at android.graphics.BaseCanvas.throwIfHwBitmapInSwMode(BaseCanvas.java:557)
at android.graphics.BaseCanvas.throwIfCannotDraw(BaseCanvas.java:69)
at android.graphics.BaseCanvas.drawBitmap(BaseCanvas.java:109)
at android.graphics.Canvas.drawBitmap(Canvas.java:1456)
at com.mayank.picturemagic.MainView.cropSelection(MainView.java:434)
at com.mayank.picturemagic.k$6.onClick(k.java:330)
at android.view.View.performClick(View.java:6608)
at android.view.View.performClickInternal(View.java:6585)
at android.view.View.access$3100(View.java:785)
at android.view.View$PerformClick.run(View.java:25921)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:201)
at android.app.ActivityThread.main(ActivityThread.java:6810)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
终于得到了一个漂亮的解决方案
imageBitmap = imageBitmap.copy(Bitmap.Config.ARGB_8888, true);
本质上是从位图中删除硬件配置。
为了解决这个问题，早些时候我尝试过imageBitmap = imageBitmap.copy(imageBitmap.getConfig(), true);在这种情况下，配置是硬件，它会抛出错误硬件位图始终是不可变的。
然而应该有更有效的解决方案以及问题的一部分 -why this works inside onDraw() but not outside remains
本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系:hwhale#tublm.com(使用前将#替换为@)
