ViewPager java.lang.OutOfMemoryError: bitmap size exceeds VM budget

android, android-viewpager, java

Solution

Your Adaptor should not be written the way you have it. You should only be decoding the bitmaps in the instantiateItem method.

private Context context;
private ArrayList<Integer> mResourceList;
private Resources resource;  

public MyPagerAdapter(Context context) { 
    this.context = context;

    resource = context.getResources();

    mResourceList = new ArrayList<Integer>();     
    mResourceList.add(R.drawable.one);
    mResourceList.add(R.drawable.two);
    mResourceList.add(R.drawable.three);
    mResourceList.add(R.drawable.four);
    mResourceList.add(R.drawable.five);
}

@Override  
public Object instantiateItem(View view, int position) {   
        ImageView myView = new ImageView(context);

        Bitmap bitmap = BitmapFactory.decodeResource(resource, mResourceList.get(position) );
        myView.setImageBitmap(bitmap);

        ((ViewPager) view).addView(myView);   
        return myView;   
}

Now, you need to make sure that your bitmaps are not exceeding the max size value (2048px x 2048px).

If you are, you must scale your image down. This can be done by adding a BitmapFactory.Options object to your BitmapFactory.decodeResouce parameters and setting the inSampleSize by a power of 2. Setting it by 2 will sample it down to 50%, 4 to 25%, etc.

BitmapFactory.Options options = new BitmapFactory.Options()
options.inSampleSize = 2

Bitmap bitmap = BitmapFactory.decodeResource(resource, mResouceList.get(position), options );

Hope this helped!

Problem

Possible Duplicate: java.lang.OutOfMemoryError: bitmap size exceeds VM budget - Android I used ViewPager to show set of images from resource folder , if my images was small in size every thing works fine , but when i replace it with high definition images which i need it to be in my app , it gave me this error : java.lang.OutOfMemoryError: bitmap size exceeds VM budget note 1 : i have now 5 images in my code for testing but finally i will have around 30 high definition images , note 2 : i wonder why this happen , i am new to android and first time to use viewpager class , before i used gallery class in another app with more than 30 high definition images and no exception happend . any advice will be appreciated , thanks alot my code : logcat stack: ``` FATAL EXCEPTION: main java.lang.OutOfMemoryError: bitmap size exceeds VM budget at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method) at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:563) at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:439) at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:462) at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:488) at com.test.demo.MyPagerAdapter.<init>(MyPagerAdapter.java:42) at com.test.demo.MainActivity.onCreate(MainActivity.java:15) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667) at android.app.ActivityThread.access$1500(ActivityThread.java:117) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:123) at android.app.ActivityThread.main(ActivityThread.java:3687) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:507) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) at dalvik.system.NativeStart.main(Native Method) ``` MainActivity ``` public class MainActivity extends Activity { private ViewPager mMyPager; private MyPagerAdapter mMyPagerAdapter; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mMyPager = (ViewPager) findViewById(R.id.mypages); mMyPagerAdapter = new MyPagerAdapter(this); mMyPager.setAdapter(mMyPagerAdapter); }} ``` MyPagerAdapter ``` public class MyPagerAdapter extends PagerAdapter { private ArrayList<ImageView> mViewsList; private Context mContext = null; public MyPagerAdapter(Context context) { mContext = context; mViewsList = new ArrayList<ImageView>(); Resources resource = mContext.getResources(); Bitmap bMap1 = BitmapFactory.decodeResource(resource, R.drawable.one); ImageView image1 = new ImageView(mContext); image1.setImageBitmap(bMap1); mViewsList.add(image1); Bitmap bMap2 = BitmapFactory.decodeResource(resource, R.drawable.two ); ImageView image2 = new ImageView(mContext); image2.setImageBitmap(bMap2); mViewsList.add(image2); Bitmap bMap3 = BitmapFactory.decodeResource(resource, R.drawable.three); ImageView image3 = new ImageView(mContext); image3.setImageBitmap(bMap3); mViewsList.add(image3); Bitmap bMap4 = BitmapFactory.decodeResource(resource, R.drawable.four); ImageView image4 = new ImageView(mContext); image4.setImageBitmap(bMap4); mViewsList.add(image4); Bitmap bMap5 = BitmapFactory.decodeResource(resource, R.drawable.five); ImageView image5 = new ImageView(mContext); image5.setImageBitmap(bMap5); mViewsList.add(image5); } @Override public int getCount() { return mViewsList.size(); } @Override public Object instantiateItem(View view, int position) { View myView = mViewsList.get(position); ((ViewPager) view).addView(myView); return myView; } @Override public boolean isViewFromObject(View view, Object object) { return view == object; } @Override public void destroyItem(View view, int arg1, Object object) { ((ViewPager) view).removeView((ImageView) object); } } ```

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