android - 后退按钮上的内存不足错误

Question

我正在创建一个幻灯片应用程序，它通过使用动画事件在同一个 ImageView 中的图像之间切换，在 ViewFlipper 中一次加载一个图像，但是当我按下后退按钮离开应用程序时，我总是收到此错误：

E/AndroidRuntime(  729): FATAL EXCEPTION: main

E/AndroidRuntime(  729): java.lang.OutOfMemoryError

E/AndroidRuntime(  729):    at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)

E/AndroidRuntime(  729):    at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:650)

E/AndroidRuntime(  729):    at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:389)

E/AndroidRuntime(  729):    at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:449)

E/AndroidRuntime(  729):    at br.com.vodia.mobilephotoframe.ConfigFragment.onActivityCreated(ConfigFragment.java:167)

E/AndroidRuntime(  729):    at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1486)

E/AndroidRuntime(  729):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:947)

E/AndroidRuntime(  729):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)

E/AndroidRuntime(  729):    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1086)

E/AndroidRuntime(  729):    at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:1877)

E/AndroidRuntime(  729):    at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:552)

E/AndroidRuntime(  729):    at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1167)

E/AndroidRuntime(  729):    at android.app.Activity.performStart(Activity.java:5216)

E/AndroidRuntime(  729):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2073)

E/AndroidRuntime(  729):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)

E/AndroidRuntime(  729):    at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3553)

E/AndroidRuntime(  729):    at android.app.ActivityThread.access$700(ActivityThread.java:140)

E/AndroidRuntime(  729):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1233)

E/AndroidRuntime(  729):    at android.os.Handler.dispatchMessage(Handler.java:99)

E/AndroidRuntime(  729):    at android.os.Looper.loop(Looper.java:137)

E/AndroidRuntime(  729):    at android.app.ActivityThread.main(ActivityThread.java:4898)

E/AndroidRuntime(  729):    at java.lang.reflect.Method.invokeNative(Native Method)

E/AndroidRuntime(  729):    at java.lang.reflect.Method.invoke(Method.java:511)

E/AndroidRuntime(  729):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)

E/AndroidRuntime(  729):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)

E/AndroidRuntime(  729):    at dalvik.system.NativeStart.main(Native Method)

这是我的代码的一部分：

 mSlideshow = (ViewFlipper) findViewById(R.id.slideshow);
        if (currentImages.size() > 0) {
            mSlideshow.setFlipInterval(interval);
            mSlideshow.setInAnimation(this, android.R.anim.fade_in);
            mSlideshow.setOutAnimation(this, android.R.anim.fade_out);

            Display display = getWindowManager().getDefaultDisplay();
            Point size = new Point();
            display.getSize(size);
            mWidth = size.x;
            mHeight = size.y;

            mSlideshowImage = (ImageView) findViewById(R.id.slideshow_image);

            mImageList = new ArrayList<String>(currentImages);

            mCurrentImage = 0;

            mCurrentBitmap = decodeSampledBitmapFromPath(mImageList.get(mCurrentImage), mWidth, mHeight);
            mSlideshowImage.setImageBitmap(mCurrentBitmap);


            mSlideshow.getInAnimation().setAnimationListener(new Animation.AnimationListener() {
                @Override
                public void onAnimationStart(Animation animation) {
                    if (mCurrentImage + 1 < mImageList.size()) {
                        mCurrentImage = mCurrentImage + 1;
                    } else {
                        mCurrentImage = 0;
                    }

                    if (mCurrentBitmap != null)
                        mCurrentBitmap.recycle();

                    mCurrentBitmap = decodeSampledBitmapFromPath(mImageList.get(mCurrentImage), mWidth, mHeight);
                    mSlideshowImage.setImageBitmap(mCurrentBitmap);
                }

                @Override
                public void onAnimationEnd(Animation animation) {


                }

                @Override
                public void onAnimationRepeat(Animation animation) {
                    //To change body of implemented methods use File | Settings | File Templates.
                }
            });

            mSlideshow.startFlipping();
        }

此代码已使用 inSampleSize 将位图的宽度和高度限制为显示分辨率。