Canvas：尝试在配置更改片段时使用回收的位图崩溃

Question

我在片段中有一个listview。listview的每一行都有imageview，我正在加载位图图像。我将位图设置为imageview的标记。下次遇到带有非空标记的图像视图时，我会在标记中回收位图并将图像重新加载到其中。这导致崩溃“画布：试图使用回收的位图android.graphics.bitmap”在活动方向更改时崩溃。我不明白为什么会这样。请帮忙。

 Bitmap bitmap = (Bitmap) imageView.getTag();
    if (bitmap != null && !bitmap.isRecycled()) {
        bitmap.recycle();
    }
    Ion.with(appContext)
            .load(uri)
            .asBitmap()
            .setCallback(new FutureCallback<Bitmap>() {
                @Override
                public void onCompleted(Exception e, Bitmap result) {
                    if (result != null) {
                        imageView.setImageBitmap(result);
                        imageView.setTag(result);
                    }
                }
            });

堆栈跟踪：java.lang.RuntimeException：画布：尝试使用回收的位图[e-mail]（Canvas.java:1270）android.graphics.Canvas.drawBitmap（Canvas.java:1404）android.graphics.drawable.BitmapDrawable.draw（BitmapDrawable.java:544）android.widget.ImageView.onDraw（ImageView.java:1228）android.view.view.draw（view.java:16184）android.view.view.view.updateDisplayListIfDirty（view.java:15180）android.view.view.draw（view.java:15954）在android.view.ViewGroup.drawChild（ViewGroup.java:3609）在android.view.ViewGroup.dispatchDraw（ViewGroup.java:3399）在android.view.view.updateDisplayListIfDirty（view.java:15175）在android.view.view.draw（view.java:15954）在android.view.ViewGroup.drawChild（ViewGroup.java:3609）在android.widget.ListView.drawChild（ListView.java:3418）在android.view.ViewGroup.dispatchDraw（ViewGroup.java:3399）在android.widget.AbsListView.dispatchDraw（AbsListView.java:2615）在android.widget.ListView.dispatchDraw（ListView.java:3413）在android.view.view.draw（view.java:16187）在android.widget.AbsListView.draw（AbsListView.java:4166）在android.view.view.view.updateDisplayListIfDirty（view.java:15180）在android.view.view.view.view.draw（view.java:15954）在android.view.ViewGroup.drawChild（ViewGroup.java:3609）在android.view.ViewGroup.dispatchDraw（ViewGroup.java:3399）在android.view.view.updateDisplayListIfDirty（view.java:15175）在android.view.ViewGroup.recreateChildDisplayList（ViewGroup.java:3593）在android.view.ViewGroup.dispatchGetDisplayList（ViewGroup.java:3573）在android.view.view.updateDisplayListIfDirty（view.java:15140）在android.view.ViewGroup.recreateChildDisplayList（ViewGroup.java:3593）在android.view.ViewGroup.dispatchGetDisplayList（ViewGroup.java:3573）在android.view.view.updateDisplayListIfDirty（view.java:15140）在android.view.ViewGroup.recreateChildDisplayList（ViewGroup.java:3593）在android.view.ViewGroup.dispatchGetDisplayList（ViewGroup.java:3573）在android.view.view.updateDisplayListIfDirty（view.java:15140）在android.view.ViewGroup.recreateChildDisplayList（ViewGroup.java:3593）在android上。view.ViewGroup.dispatchGetDisplayList（ViewGroup.java:3573）在android上。view.view.updateDisplayListIfDirty（view.java:15140）在android上。view.ViewGroup.recreateChildDisplayList（ViewGroup.java:3593）在android上。view.ViewGroup.dispatchGetDisplayList（ViewGroup.java:3573）在android上。view.view.updateDisplayListIfDirty（view.java:15140）在android.view.ViewGroup.recreateChildDisplayList（ViewGroup.java:3593）在android.view.ViewGroup.dispatchGetDisplayList（ViewGroup.java:3573）在android.view.view.updateDisplayListIfDirty（view.java:15140）在android.view.ViewGroup.recreateChildDisplayList（ViewGroup.java:3593）在android.view.ViewGroup.dispatchGetDisplayList（ViewGroup.java:3573）在android.view.view.view.updateDisplayListIfDirty（View.java:15140）在android.View.ViewGroup.recreateChildDisplayList（ViewGroup.java:3593）在android.View.ViewGroup.dispatchGetDisplayList（ViewGroup.java:3573）在android.View.View.updateDisplayListIfDirty（View.java:15140）在android.View.ThreadedRenderer.updateViewTreeDisplayList（ThreadedRenderer.java:281）在android.View.ThreadedRenderer.updateRootDisplayList（ThreadedRenderer.java:287）在android.view.ThreadedRenderer.draw（ThreadedRenderer.java:322）at android.view.ViewRootImpl.draw（ViewRootImpl.java:2615）at android.view.ViewRootImpl.performDraw（ViewRootImpl.java:2434）at android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:2067）at android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1107）at android.view.ViewRootImpl$TraversalRunable.run（ViewRootImpl.java:6013）atandroid.view.Choreographer$CallbackRecord.run（Choreographer.java:858）at android.view.Choreographer.doCallbacks（Choreographer.java:670）at android.view.Choreographer.doFrame（Choreographer.java:606）at android.view.Choreographer$FrameDisplayEventReceiver.run（Choreographer.java:844）at android.os.Handler。

Answer 1

    Bitmap bitmap = (Bitmap) imageView.getTag();
        if (bitmap != null && !bitmap.isRecycled()) {
           // bitmap.recycle();

 Ion.with(appContext)
                .load(uri)
                .asBitmap()
                .setCallback(new FutureCallback<Bitmap>() {
                    @Override
                    public void onCompleted(Exception e, Bitmap result) {
                        if (result != null) {
                            imageView.setImageBitmap(result);
                            imageView.setTag(result);
                        }
                    }
                });

        }


Try this.