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我制作了一个图像查看器项目，TouchImageView用于实现缩放、拖放、全景查看器等。

查看器工作正常，除了OutOfMemory旋转设备时出现错误，特别是全景图（不是很大，3.5 MB 应该很容易被 Galaxy Note 处理）。这是违规行：

final Bitmap myBitmap = BitmapFactory.decodeFile(filename);

当然，因为它是全景图，所以我想缩放，所以在解码时压缩图像，如此处所建议的，不是一种选择（我已经尝试过，并且有效，但是低质量扼杀了全景图的想法）。

我认为我的项目中没有内存泄漏，因为它不是内存密集型的，只会在旋转时冻结，并且违规行仅在旋转时执行一次。我可以看到全景在屏幕上对角线冻结。我认为问题在于 ImageView 的“旋转动画”。也许我应该禁用它？如果是这样，怎么做？

下面是崩溃日志。

谢谢！！

日志-

58:38.845: W/dalvikvm(2465): threadid=1: thread exiting with uncaught exception (group=0x40c531f8)
12-24 02:58:38.850: E/AndroidRuntime(2465): FATAL EXCEPTION: main
12-24 02:58:38.850: E/AndroidRuntime(2465): java.lang.OutOfMemoryError
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:587)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:389)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:418)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at com.floritfoto.apps.xvf.Foto.pic(Foto.java:180)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at com.floritfoto.apps.xvf.Foto.onCreate(Foto.java:383)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.app.Activity.performCreate(Activity.java:4465)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1052)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1932)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1993)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3363)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.app.ActivityThread.access$700(ActivityThread.java:127)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1163)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.os.Handler.dispatchMessage(Handler.java:99)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.os.Looper.loop(Looper.java:137)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at android.app.ActivityThread.main(ActivityThread.java:4507)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at java.lang.reflect.Method.invokeNative(Native Method)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at java.lang.reflect.Method.invoke(Method.java:511)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
12-24 02:58:38.850: E/AndroidRuntime(2465):     at dalvik.system.NativeStart.main(Native Method)
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2 回答 2

0

首先尝试调试代码并检查堆大小如何增加，然后查看以下链接

了解 android 如何使用其尺寸计算图像大小。要缩小图像，如果您想以编程方式缩小图像，可以尝试以下代码

public static Bitmap getResizedBitmap(Bitmap image, int newHeight, int newWidth) {
    int width = image.getWidth();
    int height = image.getHeight();
    float scaleWidth = ((float) newWidth) / width;
    float scaleHeight = ((float) newHeight) / height;
    // create a matrix for the manipulation
    Matrix matrix = new Matrix();
    // resize the bit map
    matrix.postScale(scaleWidth, scaleHeight);
    // recreate the new Bitmap
    Bitmap resizedBitmap = Bitmap.createBitmap(image, 0, 0, width, height,
            matrix, false);
    return resizedBitmap;
}

如果您想手动缩小尺寸，您可以将图像的尺寸更改为原始尺寸的大约一半

于 2012-12-24T06:08:28.063 回答
-2

试试这个功能..

public static Bitmap decodeFile(File f,int WIDTH,int HIGHT){
        try {
            //Decode image size
            BitmapFactory.Options o = new BitmapFactory.Options();
            o.inJustDecodeBounds = true;
            BitmapFactory.decodeStream(new FileInputStream(f),null,o);

            //The new size we want to scale to
            final int REQUIRED_WIDTH=WIDTH;
            final int REQUIRED_HIGHT=HIGHT;
            //Find the correct scale value. It should be the power of 2.
            int scale=1;
            while(o.outWidth/scale/2>=REQUIRED_WIDTH && o.outHeight/scale/2>=REQUIRED_HIGHT)
                scale*=2;

            //Decode with inSampleSize
            BitmapFactory.Options o2 = new BitmapFactory.Options();
            o2.inSampleSize=scale;
            return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
        } catch (FileNotFoundException e) {}
        return null;
    }
于 2012-12-24T05:54:28.073 回答