Android上内存不足

我想让它在android中实现 为此，我必须从asset文件夹加载图像，并在xml文件中创建两个

HorizontalScrollView

，然后在其中动态加载

ImageView

。对于加载ImageView，我使用以下代码

LinearLayout myGallery = (LinearLayout) findViewById(R.id.mygallery);

try {
    String galleryDirectoryName = "gallery";
    String[] listImages = getAssets().list(galleryDirectoryName);
    for (String imageName : listImages) {
        InputStream is = getAssets().open(galleryDirectoryName + "/" + imageName);
        Bitmap bitmap = BitmapFactory.decodeStream(is);

        ImageView imageView = new ImageView(getApplicationContext());
        imageView.setLayoutParams(new ViewGroup.LayoutParams(100, 100));

        //   imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        imageView.setImageBitmap(bitmap);

        LinearLayout.LayoutParams myGallery1=  new LinearLayout.LayoutParams(100, 100);
        myGallery1.setMargins(20, 0,  10, 0);

        //its is also working
        // imageView.setLayoutParams(myGallery1);       

        imageView.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                //   diplayImage.setImageBitmap(bitmap);
            }
        });

        Log.e("GalleryWithHorizontalScrollView", e.getMessage(), e);
    }

//重复上述代码以在第二个水平滚动视图中加载imageView

LinearLayout myGallery2 = (LinearLayout) findViewById(R.id.mygallery2);

try {
    String galleryDirectoryName1 = "gallery2";
    String[] listImages2 = getAssets().list(galleryDirectoryName1);
    for (String imageName : listImages2) {
        InputStream is1 = getAssets().open(galleryDirectoryName1 + "/" + imageName);
        Bitmap bitmap1 = BitmapFactory.decodeStream(is1);

        ImageView imageView = new ImageView(getApplicationContext());
        imageView.setLayoutParams(new ViewGroup.LayoutParams(100, 100));

        //  imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        imageView.setImageBitmap(bitmap1);

        LinearLayout.LayoutParams myGallery21=  new LinearLayout.LayoutParams(100, 100);
        myGallery21.setMargins(20, 40,  10, 0);

        //its is also working

        myGallery.addView(imageView,myGallery1);
    }
} catch (IOException e) {
    myGallery2.addView(imageView,myGallery21);
        }
} catch (IOException e) {
    Log.e("GalleryWithHorizontalScrollView", e.getMessage(), e);
}
}

如果我创建一个horizontalScrollView并在其中加载ImageView，那么它可以正常工作，但对于第二个horizontalScrollView，它在第76行给出了错误

Bitmap bitmap1 = BitmapFactory.decodeStream(is1);

我的原木猫是这只

05-14 11:13:26.000: E/AndroidRuntime(8350): FATAL EXCEPTION: main
05-14 11:13:26.000: E/AndroidRuntime(8350): java.lang.OutOfMemoryError
05-14 11:13:26.000: E/AndroidRuntime(8350):     at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:577)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:643)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at com.example.gallery.MainActivity.onCreate(MainActivity.java:76)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at android.app.Activity.performCreate(Activity.java:4470)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1053)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1934)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1995)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at android.app.ActivityThread.access$600(ActivityThread.java:128)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1161)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at android.os.Looper.loop(Looper.java:137)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at android.app.ActivityThread.main(ActivityThread.java:4517)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at java.lang.reflect.Method.invokeNative(Native Method)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at java.lang.reflect.Method.invoke(Method.java:511)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760)
05-14 11:13:26.000: E/AndroidRuntime(8350):     at dalvik.system.NativeStart.main(Native Method)

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简单，不要加载太多的图像

使用一些缓存，比如固定大小的LRUCache。如果图像丢失，您必须首先加载它们。应该提高性能并修复您的OOME

---

您需要使用BitmapFactory.Options访问图像

然后

这样，只需将所需大小的位图加载到内存中

有关更多信息，请参见您可以找到您的答案

最重要的是你应该为你的缩略图优化位图。 试试这个：

public static Bitmap decodeSampledBitmapFromInput(Context context,
        InputStream input, int reqWidth, int reqHeight) {

    // First decode with inJustDecodeBounds=true to check dimensions
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeStream(input, null, options);

    // Calculate inSampleSize
    options.inSampleSize = calculateInSampleSize(options, reqWidth,
            reqHeight);

    // Decode bitmap with inSampleSize set
    options.inJustDecodeBounds = false;
    return BitmapFactory.decodeStream(input, null, options);
}

这里reqWidth是缩略图的宽度，与reqHeight相同

---

对于listView，尝试为位图实现缓存，并尝试使用唯一的键获取位图，该键可能是文件名（因为不应多次保存相同的图像）

每个图像的大小是多少？不使用时，您需要回收位图。嗯，您还可以在其中总共有12幅图像，其中4幅为1024x780，其余为200x200大小。。。。在哪里调用bitmap.recycle（）…我只是在Activity中加载了两次图像。alonegoogle play store有很多图像。您可以向下滚动列表。“简单，不要加载太多图像”不是答案。在这种情况下，延迟加载或UIL应该有助于他们管理内存，这样他们就不会一次全部加载。这就是LRU发挥作用的地方。嗯，你也可以添加选项。inpurgable=true；options.inInputShareable=true；

Bitmap bitmap1 = BitmapFactory.decodeStream(is1,null,options);

public static Bitmap decodeSampledBitmapFromInput(Context context,
        InputStream input, int reqWidth, int reqHeight) {

    // First decode with inJustDecodeBounds=true to check dimensions
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeStream(input, null, options);

    // Calculate inSampleSize
    options.inSampleSize = calculateInSampleSize(options, reqWidth,
            reqHeight);

    // Decode bitmap with inSampleSize set
    options.inJustDecodeBounds = false;
    return BitmapFactory.decodeStream(input, null, options);
}