内存不足的错误加载位图

Question

时同时执行此代码我收到了内存异常，

Back.setImageBitmap(decodeSampledBitmapFromUri(myUri, 50, 50)); 

我用下面的代码来控制这个错误，并能正常工作，但对于更大的图片此错误仍然存在。

public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) { 
    // Raw height and width of image 
    final int height = options.outHeight; 
    final int width = options.outWidth; 
    int inSampleSize = 1; 

    if (height > reqHeight || width > reqWidth) { 
     if (width > height) { 
      inSampleSize = Math.round((float)height/(float)reqHeight); 
     } else { 
      inSampleSize = Math.round((float)width/(float)reqWidth); 
     } 
    } 
    return inSampleSize; 
} 

public Bitmap decodeSampledBitmapFromUri(Uri uri,int reqWidth, int reqHeight) throws FileNotFoundException { 


    // First decode with inJustDecodeBounds=true to check dimensions 
    final BitmapFactory.Options options = new BitmapFactory.Options(); 
    options.inJustDecodeBounds = true; 
    BitmapFactory.decodeStream(getContentResolver().openInputStream(uri)); 

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

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

完全错误的位置：

02-12 14:14:51.888: E/AndroidRuntime(6560): FATAL EXCEPTION: main 
02-12 14:14:51.888: E/AndroidRuntime(6560): java.lang.OutOfMemoryError 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.graphics.BitmapFactory.nativeDecodeStream(Native Method) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:530) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:603) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.app.cut.BlurIt.decodeSampledBitmapFromUri(BlurIt.java:938) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.app.cut.BlurIt.onCreate(BlurIt.java:223) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.app.Activity.performCreate(Activity.java:5133) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2230) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2316) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.app.ActivityThread.access$600(ActivityThread.java:150) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1298) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.os.Handler.dispatchMessage(Handler.java:99) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.os.Looper.loop(Looper.java:213) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at android.app.ActivityThread.main(ActivityThread.java:5225) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at java.lang.reflect.Method.invokeNative(Native Method) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at java.lang.reflect.Method.invoke(Method.java:525) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:741) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 
02-12 14:14:51.888: E/AndroidRuntime(6560):  at dalvik.system.NativeStart.main(Native Method) 

行938：

BitmapFactory.decodeStream(getContentResolver().openInputStream(uri)); 

路223：

Back.setImageBitmap(decodeSampledBitmapFromUri(myUri, 10, 10)); 

更新：

我用的这个

InputStream in = null; 

    in = getContentResolver().openInputStream(uri); 
    BitmapFactory.decodeStream(in, null, options); 

，而不是这一行

BitmapFactory.decodeStream(getContentResolver().openInputStream(uri)); 

和它的工作原理和负载图像，而不内存不足的问题，但我不知道为什么它的返回位图不是正是我所说的。我叫（100,100）返回（172,171），实际大小是（5508,5472）。

Answer 1

您可以使用Glide或Picasso库将位图加载到ImageView。

Glide.with(context).load(urlOrUri).into(imageViewToLoad);