Android Universal Image Loader 内存不足错误

Question

我正在使用通用图像加载器在网格视图中加载图像并加载图像预览，内存不足错误问题不断发生。我尝试了很多方法来更改配置、显示选项。但没有用。请给出正确的解决方法。

这是我使用通用图像加载器库显示图像的代码，

ImageLoader imageLoader = ImageLoader.getInstance();
        ImageLoaderConfiguration imageLoaderconfig = new ImageLoaderConfiguration.Builder(
                ImagePreview.this).threadPoolSize(1)
                .writeDebugLogs().memoryCache(new WeakMemoryCache())
                .build();
        imageLoader.init(imageLoaderconfig);
        DisplayImageOptions options = new DisplayImageOptions.Builder()
                .showStubImage(R.drawable.empty_icon)
                .bitmapConfig(Config.RGB_565)
                .showImageForEmptyUri(R.drawable.image_for_empty_url)

                .imageScaleType(ImageScaleType.IN_SAMPLE_INT).build();

        imageLoader.displayImage("file://"
                + CommonVariables.preview_image_path, image_preview,
                options, new ImageLoadingListener() {

                    @Override
                    public void onLoadingStarted(String imageUri, View view) {
                        // TODO Auto-generated method stub

                    }

                    @Override
                    public void onLoadingFailed(String imageUri, View view,
                            FailReason failReason) {
                        // TODO Auto-generated method stub
                        findViewById(R.id.pb_pd).setVisibility(
                                View.INVISIBLE); // progress bar
                        Toast.makeText(getApplicationContext(),
                                "Oops ! Please try again later",
                                Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onLoadingComplete(String imageUri,
                            View view, Bitmap loadedImage) {
                        // TODO Auto-generated method stub
                        Animation anim = AnimationUtils.loadAnimation(
                                ImagePreview.this, R.anim.fade_in);
                        findViewById(R.id.pb_pd).setVisibility(
                                View.INVISIBLE); // progress bar
                        image_preview.setAnimation(anim);
                        anim.start();
                    }

                    @Override
                    public void onLoadingCancelled(String imageUri,
                            View view) {
                        // TODO Auto-generated method stub
                        findViewById(R.id.pd).setVisibility(View.INVISIBLE); // progress bar
                    }
                });

例外：（原木猫）

10-22 12:30:00.414: E/AndroidRuntime(6908): FATAL EXCEPTION: main
10-22 12:30:00.414: E/AndroidRuntime(6908): java.lang.OutOfMemoryError
10-22 12:30:00.414: E/AndroidRuntime(6908):     at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
10-22 12:30:00.414: E/AndroidRuntime(6908):     at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:546)
10-22 12:30:00.414: E/AndroidRuntime(6908):     at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:320)
10-22 12:30:00.414: E/AndroidRuntime(6908):     at com.doodleblue.dateitpro.Home.decodeSampledBitmapFromUri(Home.java:669)
10-22 12:30:00.414: E/AndroidRuntime(6908):     at com.doodleblue.dateitpro.Home.addDateTime(Home.java:413)
10-22 12:30:00.414: E/AndroidRuntime(6908):     at com.doodleblue.dateitpro.Home.callmethods(Home.java:356)
10-22 12:30:00.414: E/AndroidRuntime(6908):     at com.doodleblue.dateitpro.Home.onCreate(Home.java:236)
10-22 12:30:00.414: E/AndroidRuntime(6908):     at android.app.Activity.performCreate(Activity.java:5020)
10-22 12:30:00.414: E/AndroidRuntime(6908):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)

Answer 1

尝试创建图像的缩略图。这对我有用

final int THUMBSIZE = 64;
Bitmap ThumbImage = ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(imagePath), 
                    THUMBSIZE, THUMBSIZE);

Answer 2

当图像加载到虚拟内存较少时会发生此错误。 这可以通过创建位图缩放图像来解决。 将所有可绘制对象放在一个数组中，然后像这样创建它的重新缩放位图。

Bitmap bit = BitmapFactory.decodeResource(getApplicationContext()
            .getResources(), drawable);
    if (bit != null) {
        Bitmap resizedBitmap = Bitmap.createScaledBitmap(bit, width,
                height, true);
        imageView.setBitmap(resizedBitmap);
        }

重新缩放的位图不会占用更多的虚拟内存并且可以轻松加载图像

BitmapDrawable bd=(BitmapDrawable) this.getResources().getDrawable(R.drawable.icon);
int height=bd.getBitmap().getHeight();
int width=bd.getBitmap().getWidth();