java.lang.IollegalArgumentException:无法绘制回收位图-Android

Question

我正在尝试实现Android轮子，一个可以用来模仿老虎机的库。

这个演示项目运行良好，它使用了android自己的dratables=>android。R.drawable.*

然而，当我将默认图像更改为我想要的图像时，会出现以下错误：

java.lang.IllegalArgumentException: Cannot draw recycled bitmaps

我所改变的只是id的数组，其中包含对图像的引用

来自

private final int items[] = new int[] {
android.R.drawable.star_big_on,
android.R.drawable.stat_sys_warning,
android.R.drawable.radiobutton_on_background,
android.R.drawable.ic_delete
};

到

private final int items[] = new int[] {
R.drawable.sunglasses, R.drawable.ball, R.drawable.box};

这是代码的其余部分。

private class SlotMachineAdapter extends AbstractWheelAdapter {
// Image size
final int IMAGE_WIDTH = 267;
final int IMAGE_HEIGHT = 200;
// Slot machine symbols
private final int items[] = new int[] {
R.drawable.sunglasses, R.drawable.ball, R.drawable.box};
// Cached images
private List<SoftReference<Bitmap>> images;
// Layout inflater
private Context context;
/**
* Constructor
*/
public SlotMachineAdapter(Context context) {
this.context = context;
images = new ArrayList<SoftReference<Bitmap>>(items.length);
for (int id : items) {
images.add(new SoftReference<Bitmap>(loadImage(id)));
}
}
/**
* Loads image from resources
*/
private Bitmap loadImage(int id) {
Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), id);
Bitmap scaled = Bitmap.createScaledBitmap(bitmap, IMAGE_WIDTH, IMAGE_HEIGHT, true);
bitmap.recycle();
return scaled;
}
@Override
public int getItemsCount() {
return items.length;
}
// Layout params for image view
final LayoutParams params = new LayoutParams(IMAGE_WIDTH, IMAGE_HEIGHT);
@Override
public View getItem(int index, View cachedView, ViewGroup parent) {
ImageView img;
if (cachedView != null) {
img = (ImageView) cachedView;
} else {
img = new ImageView(context);
}
img.setLayoutParams(params);
SoftReference<Bitmap> bitmapRef = images.get(index);
Bitmap bitmap = bitmapRef.get();
if (bitmap == null) {
bitmap = loadImage(items[index]);
images.set(index, new SoftReference<Bitmap>(bitmap));
}
img.setImageBitmap(bitmap);
return img;
}
}

这是完整的堆叠

java.lang.IllegalArgumentException: Cannot draw recycled bitmaps
at android.view.GLES20Canvas.drawBitmap(GLES20Canvas.java:778)
at android.view.GLES20RecordingCanvas.drawBitmap(GLES20RecordingCanvas.java:117)
at android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:393)
at android.widget.ImageView.onDraw(ImageView.java:961)
at android.view.View.draw(View.java:13765)
at android.view.View.draw(View.java:13649)
at android.view.ViewGroup.drawChild(ViewGroup.java:2940)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2810)
at android.view.View.draw(View.java:13768)
at kankan.wheel.widget.WheelView.drawItems(WheelView.java:587)
at kankan.wheel.widget.WheelView.onDraw(WheelView.java:557)
android.view.View.draw(View.java:13765)
at android.view.View.getDisplayList(View.java:12716)
at android.view.View.getDisplayList(View.java:12760)
at android.view.View.draw(View.java:13489)
at android.view.ViewGroup.drawChild(ViewGroup.java:2940)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2810)
at android.view.View.getDisplayList(View.java:12714)
at android.view.View.getDisplayList(View.java:12760)
at android.view.View.draw(View.java:13489)
at android.view.ViewGroup.drawChild(ViewGroup.java:2940)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2810)
at android.view.View.draw(View.java:13768)
at android.view.View.getDisplayList(View.java:12716)
at android.view.View.getDisplayList(View.java:12760)
at android.view.View.draw(View.java:13489)
at android.view.ViewGroup.drawChild(ViewGroup.java:2940)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2810)
at android.view.View.getDisplayList(View.java:12714)
at android.view.View.getDisplayList(View.java:12760)
at android.view.View.draw(View.java:13489)
at android.view.ViewGroup.drawChild(ViewGroup.java:2940)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2810)
at android.view.View.getDisplayList(View.java:12714)
at android.view.View.getDisplayList(View.java:12760)
at android.view.View.draw(View.java:13489)
at android.view.ViewGroup.drawChild(ViewGroup.java:2940)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2810)
at android.view.View.draw(View.java:13768)
at android.widget.FrameLayout.draw(FrameLayout.java:467)
at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2394)
at android.view.View.getDisplayList(View.java:12716)
at android.view.View.getDisplayList(View.java:12760)
at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:1144)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2267)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2139)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1950)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4464)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
at android.view.Choreographer.doCallbacks(Choreographer.java:555)
at android.view.Choreographer.doFrame(Choreographer.java:525)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4895) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761) at dalvik.system.NativeStart.main(Native Method)

Answer 1

我认为这是因为你做bitmap.recycle()太频繁了，而system.gc()没有及时调用，所以变量bitmap是recycle()，但系统并没有真正清除，我们不能用它来加载新的图像。所以，只需注释bitmap.recycle()，让系统自己回收gabage。

Answer 2

试试这个-

if(bitmap!=null)
{
bitmap.recycle();
bitmap=null;
}