我想显示的位图图像在ImageView从sd卡已经存储。运行后,我的应用程序是崩溃和得到OutOfMemoryError错误:

(. lang。OutOfMemoryError:未能分配23970828字节分配,2097152空闲字节和2MB直到OOM)

我不知道为什么它没有记忆。我觉得我的图片太大了,所以我试着改变它。

Iterator<String> it = imageArray.iterator();
while (it.hasNext()) {
  Object element = it.next();
  String objElement = element.toString();
  Log.e("objElement ", " = " + objElement);
  final ImageView imageView = new ImageView (getContext());
  final ProgressBar pBar = new ProgressBar(getContext(), null, 
                                           android.R.attr.progressBarStyleSmall);
  imageView.setTag(it);
  pBar.setTag(it);

  imageView.setImageResource(R.drawable.img_placeholder);
  pBar.setVisibility(View.VISIBLE);

  if (objElement.endsWith(mp3_Pattern)) {
     Log.e("Mp3 ", " ends with ");
     pBar.setVisibility(View.GONE);
     imageView.setImageResource(R.drawable.audio_control);
  }
  if (objElement.endsWith(png_Pattern)) {
     Bitmap bitmap = BitmapFactory.decodeFile(objElement);
     int size = Math.min(bitmap.getWidth(), bitmap.getHeight());
     int x = (bitmap.getWidth() - size) / 2;
     int y = (bitmap.getHeight() - size) / 2;
     Bitmap bitmap_Resul = Bitmap.createBitmap(bitmap, x, y, size, size);
     Log.e("bitmap_Resul "," = "+ bitmap_Resul);

     if (bitmap_Resul != bitmap) {
        bitmap.recycle();
     }
     imageView.setImageBitmap(bitmap_Resul);
     Log.e("png_Pattern ", " ends with ");
     Log.e(" bitmap "," = " + bitmap);
  }

  holder.linearLayout.addView(imageView);
  holder.linearLayout.addView(pBar);

日志猫信息:

08-27 14:11:15.307    1857-1857/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.example.tazeen.classnkk, PID: 1857
    java.lang.OutOfMemoryError: Failed to allocate a 23970828 byte allocation with 2097152 free bytes and 2MB until OOM
            at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
            at android.graphics.Bitmap.nativeCreate(Native Method)
            at android.graphics.Bitmap.createBitmap(Bitmap.java:812)
            at android.graphics.Bitmap.createBitmap(Bitmap.java:789)
            at android.graphics.Bitmap.createBitmap(Bitmap.java:709)
            at android.graphics.Bitmap.createBitmap(Bitmap.java:634)
            at com.example.tazeen.classnkk.AllPosts_Page$MyListAdapter.getView(AllPosts_Page.java:357)
            at android.widget.AbsListView.obtainView(AbsListView.java:2347)
            at android.widget.ListView.makeAndAddView(ListView.java:1864)
            at android.widget.ListView.fillDown(ListView.java:698)
            at android.widget.ListView.fillFromTop(ListView.java:759)
            at android.widget.ListView.layoutChildren(ListView.java:1659)
            at android.widget.AbsListView.onLayout(AbsListView.java:2151)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
            at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
            at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
            at android.view.View.layout(View.java:15671)
            at android.view.ViewGroup.layout(ViewGroup.java:5038)
            at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2086)
            at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1843)
            at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061)
            at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885)
            at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
            at android.view.Choreographer.doCallbacks(Choreographer.java:580)
            at android.view.Choreographer.doFrame(Choreographer.java:550)
            at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
            at android.os.Handler.handleCallback(Handler.java:739)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5257)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

当前回答

在设置为ImageView之前,像这样调整图像的大小:

Bitmap.createScaledBitmap(_yourImageBitmap, _size, _size, false);

其中size是ImageView的实际大小。你可以通过测量来达到尺寸:

imageView.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));

并使用下一个大小imageView.getMeasuredWidth()和imageView.getMeasuredHeight()进行缩放。

其他回答

Last but not the least....

Try Method One:

Simple Add these lines of code in the gradle file

dexOptions {
        incremental true
        javaMaxHeapSize "4g"
     }

Example:

android {
    compileSdkVersion XX
    buildToolsVersion "28.X.X"

    defaultConfig {
        applicationId "com.example.xxxxx"
        minSdkVersion 14
        targetSdkVersion 19
    }

dexOptions {
        incremental true
        javaMaxHeapSize "4g"
     }
}

*******************************************************************

Method Two:

Add these two lines of code in manifest file...

android:hardwareAccelerated="false" 
android:largeHeap="true"

Example:

<application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:hardwareAccelerated="false"
        android:largeHeap="true"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

It will Work for sure any of these cases.....

使用像Picasso或Glide这样的图像加载库。使用这些库将在将来防止崩溃。

解决方案尝试在您的清单文件和使用滑翔库

编译的com.github.bumptech.glide:滑翔:3.7.0

    **Use Glide Library and Override size to less size;**

 if (!TextUtils.isEmpty(message.getPicture())) {
            Glide.with(mContext).load(message.getPicture())
                    .thumbnail(0.5f)
                    .crossFade()
                    .transform(new CircleTransform(mContext))
                    .diskCacheStrategy(DiskCacheStrategy.ALL)
                    .into(holder.imgProfile);
        } 

android: hardwareAccelerated =“虚假”

android:largeHeap=“true”

<application
    android:allowBackup="true"
    android:hardwareAccelerated="false"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:largeHeap="true"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">

使用这个库

  compile 'com.github.bumptech.glide:glide:3.7.0'   

工作快乐编码

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Paint;

import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;


public class CircleTransform extends BitmapTransformation {
    public CircleTransform(Context context) {
        super(context);
    }

    @Override
    protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
        return circleCrop(pool, toTransform);
    }

    private static Bitmap circleCrop(BitmapPool pool, Bitmap source) {
        if (source == null) return null;

        int size = Math.min(source.getWidth(), source.getHeight());
        int x = (source.getWidth() - size) / 2;
        int y = (source.getHeight() - size) / 2;

        // TODO this could be acquired from the pool too
        Bitmap squared = Bitmap.createBitmap(source, x, y, size, size);

        Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888);
        if (result == null) {
            result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
        }

        Canvas canvas = new Canvas(result);
        Paint paint = new Paint();
        paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
        paint.setAntiAlias(true);
        float r = size / 2f;
        canvas.drawCircle(r, r, r, paint);
        return result;
    }

    @Override
    public String getId() {
        return getClass().getName();
    }
}

你试过把这个加到你的申请清单里吗?android: largeHeap = " true "吗?

像这样

  <application
      android:name=".ParaseApplication"
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:theme="@style/AppTheme"
      android:largeHeap="true" >

I have found that images in the 'drawable' folder will get converted to a much larger image on high def phones. For example, a 200k image will be resampled to a higher res, like 800k or 32000k. I had to discover this on my own and to date have not seen documentation for this heap memory trap. To prevent this I put everything in a drawable-nodpi folder (in addition to using 'options' in BitmapFactory based on the particular device heap). I can't afford to have the size of my app bloated with multiple drawable folders, particularly as the range of screen defs is so vast now. The tricky thing is studio now doesn't specifically indicate the 'drawable-nodpi' folder as such in the project view, it just shows a 'drawable' folder. If you're not careful, when you drop an image to this folder in studio, it won't actually get dropped into the drawable-nodpi:

Careful here 'backgroundtest' did not actually go to drawable-nodpi and will 
be resampled higher, such as 4x or 16x of the original dimensions for high def screens.

一定要单击对话框中的nodpi文件夹,因为项目视图不会像以前那样分别显示所有可绘制的文件夹,所以不会立即显示到错误的文件夹。在我很久以前删除了它之后,Studio在某个时候为我重新创建了香草“可绘制”: