Question

我创建了一个GridView，如下所示

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/content_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="application.example.com.fragment_practice.MainActivity"
    tools:showIn="@layout/app_bar_main">

    <GridView xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/image_grid_view"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:columnWidth="@dimen/grid_view_width"
        android:gravity="center"
        android:horizontalSpacing="10dp"
        android:numColumns="auto_fit"
        android:stretchMode="columnWidth"
        android:verticalSpacing="@dimen/dp_10" />
</RelativeLayout>

以下是我的MainActivity.java课程

 public class MainActivity extends Activity {
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);

      GridView gridview = (GridView) findViewById(R.id.gridview);
      gridview.setAdapter(new ImageAdapter(this));
   }
}

以下是ImageAdapter.java类

   public class ImageAdapter extends BaseAdapter {
    private Context mContext;

    // Constructor
    public ImageAdapter(Context c) {
        mContext = c;
    }

    public int getCount() {
        return mThumbIds.length;
    }

    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return 0;
    }

    // create a new ImageView for each item referenced by the Adapter
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;

        if (convertView == null) {
            imageView = new ImageView(mContext);
            imageView.setLayoutParams(new GridView.LayoutParams(180, 180));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(15, 15, 15, 15);
        }
        else
        {
            imageView = (ImageView) convertView;
        }
        imageView.setImageResource(mThumbIds[position]);
        return imageView;
    }

    // Keep all Images in array
    public Integer[] mThumbIds = {
            R.drawable.sample_1, R.drawable.sample_2,
            R.drawable.sample_3, R.drawable.sample_4,
            R.drawable.sample_5, R.drawable.sample_6,
            R.drawable.sample_7, R.drawable.sample_8,
            R.drawable.sample_13, R.drawable.sample_9,
            R.drawable.sample_10, R.drawable.sample_11,
            R.drawable.sample_12, R.drawable.sample_13,
            R.drawable.sample_14, R.drawable.sample_16,
            R.drawable.sample_16, R.drawable.sample_17,
            R.drawable.sample_18, R.drawable.sample_19,
            R.drawable.sample_20, R.drawable.sample_21,
            R.drawable.sample_22, R.drawable.sample_23
    };
}

在滚动之前，每件事情都很完美。以下是我在向上和向下滚动GridView 3-4次时的例外情况。

致命的例外：mai
处理：application.example.com.fragment_practice，PID：18917 java.lang.OutOfMemoryError：无法分配4915212字节分配2666656个空闲字节和2MB直到OOM at dalvik.system.VMRuntime.newNonMovableArray（Native Method）在android.graphics.BitmapFactory.nativeDecodeAsset（本机方法）在android.graphics.BitmapFactory.decodeStream（BitmapFactory.java:856）在 android.graphics.BitmapFactory.decodeResourceStream（BitmapFactory.java:675）在 android.graphics.drawable.Drawable.createFromResourceStream（Drawable.java:2230）在 android.content.res.Resources.loadDrawableForCookie（Resources.java:4284）在android.content.res.Resources.loadDrawable（Resources.java:4158）在android.content.res.Resources.getDrawable（Resources.java:2043）在android.content.res.Resources.getDrawable（Resources.java:2025）在android.content.Context.getDrawable（Context.java:464）在android.widget.ImageView.resolveUri（ImageView.java:827）在android.widget.ImageView.setImageResource（ImageView.java:434）在 application.example.com.fragment_practice.ImageAdapter.getView（ImageAdapter.java:48）在android.widget.AbsListView.obtainView（AbsListView.java:2937）在android.widget.GridView.makeAndAddView（GridView.java:1463）在android.widget.GridView.makeRow（GridView.java:366）在android.widget.GridView.fillUp（GridView.java:407）在android.widget.GridView.fillGap（GridView.java:282）在android.widget.AbsListView.trackMotionScroll（AbsListView.java:7307）在android.widget.AbsListView.scrollIfNeeded（AbsListView.java:4400）在android.widget.AbsListView.onTouchMove（AbsListView.java:5796）在android.widget.AbsListView.onTouchEvent（AbsListView.java:5624）在android.view.View.dispatchTouchEvent（View.java:10011）在 android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2833）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2504）在 android.widget.AbsListView.dispatchTouchEvent（AbsListView.java:5561）在 android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2844）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2519）在 android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2844）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2519）在 android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2844）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2519）在 android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2844）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2519）在 android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2844）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2519）在 android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2844）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2519）在 android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2844）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2519）在 android.view.ViewGroup.dispatchTransformedTouchEvent（ViewGroup.java:2844）在android.view.ViewGroup.dispatchTouchEvent（ViewGroup.java:2519）在 com.android.internal.policy.PhoneWindow $ DecorView.superDispatchTouchEvent（PhoneWindow.java:2840）在 com.android.internal.policy.PhoneWindow.superDispatchTouchEvent（PhoneWindow.java:1853）在android.app.Activity.dispatchTouchEvent（Activity.java:3061）在 android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent（WindowCallbackWrapper.java:63）在 android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent（WindowCallbackWrapper.java:63）在 com.android.internal.policy.PhoneWindow $ DecorView.dispatchTouchEvent（PhoneWindow.java:2801）在android.view.View.dispatchPointerEvent（View.java:10246）在 android.view.ViewRootImpl $ ViewPostImeInputStage.processPointerEvent（ViewRootImpl.java:5447）在 android.view.ViewRootImpl $ ViewPostImeInputStage.onProcess（ViewRootImpl.java:5283）在 android.view.ViewRootImpl $ InputStage.deliver（ViewRootImpl.java:4721）在android.view.ViewRootImpl $ InputStage.onDeliverToNext（ViewRootImpl。

编辑1：任何人都可以解释一下为什么我在滚动3-4次上下网格视图时没有加载这个问题？

Answer 1

使用Glide加载图片： -

在您的gradle中添加依赖

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

加载图片： -

Glide.with(mContext).load(mThumbIds[position]).placeholder(R.drawable.user_placeholder).into(imageView);

如果这不起作用试试这个，在Android块中添加应用程序的build.gradle

dexOptions {
    incremental true
    javaMaxHeapSize "4g"
    jumboMode = true
}

Answer 2

我建议您使用名为Glide的库，使用此库在gradle文件中添加以下内容

dependencies {
  compile 'com.github.bumptech.glide:glide:3.7.0'
}

然后在res文件夹中创建一个名为drawable-nodpi的文件夹。将所有图像放在那里，不要忘记从drawable-hdpi和其他可绘制文件夹中删除图像。确保图像仅存在于drawable-nodpi文件夹中。然后，而不是imageView.setImageResource(mThumbIds[position]);，请执行以下操作

Glide.with(mContext)
     .load(mThumbIds[position])
     .diskCacheStrategy( DiskCacheStrategy.NONE )
     .skipMemoryCache( true )
     .int‌o(imageView);

让我知道它是否有效。

Android：滚动GridView时内存不足异常？

2 个答案: