我一直遇到这个问题,不知道该怎么办。
我使用了 这个 库,在获得裁剪后的图像后,将其保存在静态变量中并移动到下一个活动。当我到达下一个活动时,我引用该静态变量以获取位图并尝试缩小它,但是它给我报错。
这是我所做的。
public void buttonCropClick(View view) throws IOException
{
imageView.setDrawingCacheEnabled(true);
imageView.buildDrawingCache(true);
Snapshot.CroppedBitmap = imageView.getDrawingCache(true);
imageView.setDrawingCacheEnabled(false);
startActivity(new Intent(this,RecommendationInfo.class));
}
在RecommendationInfo
类中,我在下面这行代码中获取位图:Snapshot.CroppedBitmap = imageView.getDrawingCache(true);
然后我将此位图保存到静态变量中,在下一个活动中引用并传递给以下函数。
public static Bitmap scaleDown(Bitmap realImage,boolean filter) {
float maxImageSize = HeightToSet;
float ratio = Math.min(
(float) maxImageSize / realImage.getWidth(),
(float) maxImageSize / realImage.getHeight());
int width = Math.round((float) ratio * realImage.getWidth());
int height = Math.round((float) ratio * realImage.getHeight());
// Error here
Bitmap newBitmap = Bitmap.createScaledBitmap(realImage, width,height, filter);
return newBitmap;
}
我已经尝试了调用bitmap.recycle()
方法,为什么我还是遇到这个问题?我该怎么解决它?以下是我的logcat日志。
07-14 03:09:43.713: E/AndroidRuntime(19653): FATAL EXCEPTION: main
07-14 03:09:43.713: E/AndroidRuntime(19653): java.lang.RuntimeException: Canvas: trying to use a recycled bitmap android.graphics.Bitmap@4059b8b8
07-14 03:09:43.713: E/AndroidRuntime(19653): at android.graphics.Canvas.throwIfRecycled(Canvas.java:955)
07-14 03:09:43.713: E/AndroidRuntime(19653): at android.graphics.Canvas.drawBitmap(Canvas.java:1012)
07-14 03:09:43.713: E/AndroidRuntime(19653): at android.graphics.Bitmap.createBitmap(Bitmap.java:462)
07-14 03:09:43.713: E/AndroidRuntime(19653): at android.graphics.Bitmap.createScaledBitmap(Bitmap.java:349)
07-14 03:09:43.713: E/AndroidRuntime(19653): at com.example.Libraries.Snapshot.scaleDown(Snapshot.java:42)
07-14 03:09:43.713: E/AndroidRuntime(19653): at com.example.androidtestproject.RecommendationInfo.SetRecommendationValues(RecommendationInfo.java:195)
07-14 03:09:43.713: E/AndroidRuntime(19653): at com.example.androidtestproject.RecommendationInfo.access$5(RecommendationInfo.java:183)
07-14 03:09:43.713: E/AndroidRuntime(19653): at com.example.androidtestproject.RecommendationInfo$1.onClick(RecommendationInfo.java:154)
07-14 03:09:43.713: E/AndroidRuntime(19653): at android.view.View.performClick(View.java:2552)
07-14 03:09:43.713: E/AndroidRuntime(19653): at android.view.View$PerformClick.run(View.java:9229)
07-14 03:09:43.713: E/AndroidRuntime(19653): at android.os.Handler.handleCallback(Handler.java:587)
07-14 03:09:43.713: E/AndroidRuntime(19653): at android.os.Handler.dispatchMessage(Handler.java:92)
07-14 03:09:43.713: E/AndroidRuntime(19653): at android.os.Looper.loop(Looper.java:138)
07-14 03:09:43.713: E/AndroidRuntime(19653): at android.app.ActivityThread.main(ActivityThread.java:3701)
07-14 03:09:43.713: E/AndroidRuntime(19653): at java.lang.reflect.Method.invokeNative(Native Method)
07-14 03:09:43.713: E/AndroidRuntime(19653): at java.lang.reflect.Method.invoke(Method.java:507)
07-14 03:09:43.713: E/AndroidRuntime(19653): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:878)
07-14 03:09:43.713: E/AndroidRuntime(19653): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:636)
07-14 03:09:43.713: E/AndroidRuntime(19653): at dalvik.system.NativeStart.main(Native Method)
07-14 03:09:45.515: E/TAG(20039): End of input at character 0 of
createScaledImage
后添加if (newBitmap != realImage) {realImage.recycle(); realImage = newBitmap ;} System.gc();
,并且像 k0sh 提到的那样... 确保在将位图传递到下一个活动之前不要首先回收它。 - Alamri