CODEWITHSUNDEEP
androidnullpointerexception
user2493360
user2493360

Reputation: 33

NullPointerException android crash

Hi guys i have this problem: Caused by: java.lang.NullPointerException at com.example.myapplication.Foto$ImageAdapter.getCount(Foto.java:65)//error1 at android.widget.GridView.setAdapter(GridView.java:182) at com.example.myapplication.Foto.onCreate(Foto.java:46)//error2

Here is my code:

 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.os.Bundle;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
 import android.widget.BaseAdapter;
 import android.widget.GridView;
 import android.widget.ImageView;

 import com.example.myapplication.universalimageloader.AbsListViewBaseActivity;
 import com.example.myapplication.universalimageloader.Constants;
 import com.example.myapplication.universalimageloader.ImagePagerActivity;
 import com.nostra13.universalimageloader.core.DisplayImageOptions;

public class Foto extends AbsListViewBaseActivity {


String[] imageUrls;

DisplayImageOptions options;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.ac_image_grid);

    Bundle bundle = getIntent().getExtras();

    if (bundle != null) {
        imageUrls = bundle.getStringArray(Constants.Extra.IMAGES);
    }

    options = new DisplayImageOptions.Builder()
            .showStubImage(R.drawable.ic_stub)
            .showImageForEmptyUri(R.drawable.ic_empty)
            .showImageOnFail(R.drawable.ic_error)
            .cacheInMemory()
            .cacheOnDisc()
            .bitmapConfig(Bitmap.Config.RGB_565)
            .build();

    listView = (GridView) findViewById(R.id.gridview);
    ((GridView) listView).setAdapter(new ImageAdapter()); //ERROR 2
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            startImagePagerActivity(position);
        }
    });
}

private void startImagePagerActivity(int position) {
    Intent intent = new Intent(this, ImagePagerActivity.class);
    intent.putExtra(Constants.Extra.IMAGES, imageUrls);
    intent.putExtra(Constants.Extra.IMAGE_POSITION, position);
    startActivity(intent);
}

public class ImageAdapter extends BaseAdapter {
    @Override
    public int getCount() {
        return imageUrls.length;  //ERROR 1
    }

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

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        final ImageView imageView;
        if (convertView == null) {
            imageView = (ImageView) getLayoutInflater().inflate(R.layout.item_grid_image, parent, false);
        } else {
            imageView = (ImageView) convertView;
        }

        imageLoader.displayImage(imageUrls[position], imageView, options);

        return imageView;
    }
}
}

What Can i do?

public final class Constants {

public static final String[] IMAGES = new String[] {
        // Heavy images
        "https://lh6.googleusercontent.com/-jZgveEqb6pg/T3R4kXScycI/AAAAAAAAAE0/xQ7CvpfXDzc/s1024/sample_image_01.jpg",
        "https://lh4.googleusercontent.com/-K2FMuOozxU0/T3R4lRAiBTI/AAAAAAAAAE8/a3Eh9JvnnzI/s1024/sample_image_02.jpg",
        "https://lh5.googleusercontent.com/-SCS5C646rxM/T3R4l7QB6xI/AAAAAAAAAFE/xLcuVv3CUyA/s1024/sample_image_03.jpg",
        "https://lh6.googleusercontent.com/-f0NJR6-_Thg/T3R4mNex2wI/AAAAAAAAAFI/45oug4VE8MI/s1024/sample_image_04.jpg",
        "https://lh3.googleusercontent.com/-n-xcJmiI0pg/T3R4mkSchHI/AAAAAAAAAFU/EoiNNb7kk3A/s1024/sample_image_05.jpg",
        "https://lh3.googleusercontent.com/-X43vAudm7f4/T3R4nGSChJI/AAAAAAAAAFk/3bna6D-2EE8/s1024/sample_image_06.jpg",
        "https://lh5.googleusercontent.com/-MpZneqIyjXU/T3R4nuGO1aI/AAAAAAAAAFg/r09OPjLx1ZY/s1024/sample_image_07.jpg",
        "https://lh6.googleusercontent.com/-ql3YNfdClJo/T3XvW9apmFI/AAAAAAAAAL4/_6HFDzbahc4/s1024/sample_image_08.jpg",
        "https://lh5.googleusercontent.com/-Pxa7eqF4cyc/T3R4oasvPEI/AAAAAAAAAF0/-uYDH92h8LA/s1024/sample_image_09.jpg",
        "https://lh4.googleusercontent.com/-Li-rjhFEuaI/T3R4o-VUl4I/AAAAAAAAAF8/5E5XdMnP1oE/s1024/sample_image_10.jpg",
        "https://lh5.googleusercontent.com/-_HU4fImgFhA/T3R4pPVIwWI/AAAAAAAAAGA/0RfK_Vkgth4/s1024/sample_image_11.jpg",
        "https://lh6.googleusercontent.com/-0gnNrVjwa0Y/T3R4peGYJwI/AAAAAAAAAGU/uX_9wvRPM9I/s1024/sample_image_12.jpg",
        "https://lh3.googleusercontent.com/-HBxuzALS_Zs/T3R4qERykaI/AAAAAAAAAGQ/_qQ16FaZ1q0/s1024/sample_image_13.jpg",
        "https://lh4.googleusercontent.com/-cKojDrARNjQ/T3R4qfWSGPI/AAAAAAAAAGY/MR5dnbNaPyY/s1024/sample_image_14.jpg",
        "https://lh3.googleusercontent.com/-WujkdYfcyZ8/T3R4qrIMGUI/AAAAAAAAAGk/277LIdgvnjg/s1024/sample_image_15.jpg",
        "https://lh6.googleusercontent.com/-FMHR7Vy3PgI/T3R4rOXlEKI/AAAAAAAAAGs/VeXrDNDBkaw/s1024/sample_image_16.jpg",
        "https://lh4.googleusercontent.com/-mrR0AJyNTH0/T3R4rZs6CuI/AAAAAAAAAG0/UE1wQqCOqLA/s1024/sample_image_17.jpg",
        "https://lh6.googleusercontent.com/-z77w0eh3cow/T3R4rnLn05I/AAAAAAAAAG4/BaerfWoNucU/s1024/sample_image_18.jpg",
        "https://lh5.googleusercontent.com/-aWVwh1OU5Bk/T3R4sAWw0yI/AAAAAAAAAHE/4_KAvJttFwA/s1024/sample_image_19.jpg",
        "https://lh6.googleusercontent.com/-q-js52DMnWQ/T3R4tZhY2sI/AAAAAAAAAHM/A8kjp2Ivdqg/s1024/sample_image_20.jpg",
        "https://lh5.googleusercontent.com/-_jIzvvzXKn4/T3R4t7xpdVI/AAAAAAAAAHU/7QC6eZ10jgs/s1024/sample_image_21.jpg",
        "https://lh3.googleusercontent.com/-lnGi4IMLpwU/T3R4uCMa7vI/AAAAAAAAAHc/1zgzzz6qTpk/s1024/sample_image_22.jpg",
        "https://lh5.googleusercontent.com/-fFCzKjFPsPc/T3R4u0SZPFI/AAAAAAAAAHk/sbgjzrktOK0/s1024/sample_image_23.jpg",
        "https://lh4.googleusercontent.com/-8TqoW5gBE_Y/T3R4vBS3NPI/AAAAAAAAAHs/EZYvpNsaNXk/s1024/sample_image_24.jpg",
        "https://lh6.googleusercontent.com/-gc4eQ3ySdzs/T3R4vafoA7I/AAAAAAAAAH4/yKii5P6tqDE/s1024/sample_image_25.jpg",
        "https://lh5.googleusercontent.com/--NYOPCylU7Q/T3R4vjAiWkI/AAAAAAAAAH8/IPNx5q3ptRA/s1024/sample_image_26.jpg",
        "https://lh6.googleusercontent.com/-9IJM8so4vCI/T3R4vwJO2yI/AAAAAAAAAIE/ljlr-cwuqZM/s1024/sample_image_27.jpg",
        "https://lh4.googleusercontent.com/-KW6QwOHfhBs/T3R4w0RsQiI/AAAAAAAAAIM/uEFLVgHPFCk/s1024/sample_image_28.jpg",
        "https://lh4.googleusercontent.com/-z2557Ec1ctY/T3R4x3QA2hI/AAAAAAAAAIk/9-GzPL1lTWE/s1024/sample_image_29.jpg",
        "https://lh5.googleusercontent.com/-LaKXAn4Kr1c/T3R4yc5b4lI/AAAAAAAAAIY/fMgcOVQfmD0/s1024/sample_image_30.jpg",
        "https://lh4.googleusercontent.com/-F9LRToJoQdo/T3R4yrLtyQI/AAAAAAAAAIg/ri9uUCWuRmo/s1024/sample_image_31.jpg",
        "https://lh4.googleusercontent.com/-6X-xBwP-QpI/T3R4zGVboII/AAAAAAAAAIs/zYH4PjjngY0/s1024/sample_image_32.jpg",
        "https://lh5.googleusercontent.com/-VdLRjbW4LAs/T3R4zXu3gUI/AAAAAAAAAIw/9aFp9t7mCPg/s1024/sample_image_33.jpg",
        "https://lh6.googleusercontent.com/-gL6R17_fDJU/T3R4zpIXGjI/AAAAAAAAAI8/Q2Vjx-L9X20/s1024/sample_image_34.jpg",
        "https://lh3.googleusercontent.com/-1fGH4YJXEzo/T3R40Y1B7KI/AAAAAAAAAJE/MnTsa77g-nk/s1024/sample_image_35.jpg",
        "https://lh4.googleusercontent.com/-Ql0jHSrea-A/T3R403mUfFI/AAAAAAAAAJM/qzI4SkcH9tY/s1024/sample_image_36.jpg",
        "https://lh5.googleusercontent.com/-BL5FIBR_tzI/T3R41DA0AKI/AAAAAAAAAJk/GZfeeb-SLM0/s1024/sample_image_37.jpg",
        "https://lh4.googleusercontent.com/-wF2Vc9YDutw/T3R41fR2BCI/AAAAAAAAAJc/JdU1sHdMRAk/s1024/sample_image_38.jpg",
        "https://lh6.googleusercontent.com/-ZWHiPehwjTI/T3R41zuaKCI/AAAAAAAAAJg/hR3QJ1v3REg/s1024/sample_image_39.jpg",
        // Light images
        "http://tabletpcssource.com/wp-content/uploads/2011/05/android-logo.png",
        "http://simpozia.com/pages/images/stories/windows-icon.png",
        "https://si0.twimg.com/profile_images/1135218951/gmail_profile_icon3_normal.png",
        "http://www.krify.net/wp-content/uploads/2011/09/Macromedia_Flash_dock_icon.png",
        "http://radiotray.sourceforge.net/radio.png",
        "http://www.bandwidthblog.com/wp-content/uploads/2011/11/twitter-logo.png",
        "http://weloveicons.s3.amazonaws.com/icons/100907_itunes1.png",
        "http://weloveicons.s3.amazonaws.com/icons/100929_applications.png",
        "http://www.idyllicmusic.com/index_files/get_apple-iphone.png",
        "http://www.frenchrevolutionfood.com/wp-content/uploads/2009/04/Twitter-Bird.png",
        "http://3.bp.blogspot.com/-ka5MiRGJ_S4/TdD9OoF6bmI/AAAAAAAAE8k/7ydKtptUtSg/s1600/Google_Sky%2BMaps_Android.png",
        "http://www.desiredsoft.com/images/icon_webhosting.png",
        "http://goodereader.com/apps/wp-content/uploads/downloads/thumbnails/2012/01/hi-256-0-99dda8c730196ab93c67f0659d5b8489abdeb977.png",
        "http://1.bp.blogspot.com/-mlaJ4p_3rBU/TdD9OWxN8II/AAAAAAAAE8U/xyynWwr3_4Q/s1600/antivitus_free.png",
        "http://cdn3.iconfinder.com/data/icons/transformers/computer.png",
        "http://cdn.geekwire.com/wp-content/uploads/2011/04/firefox.png?7794fe",
        "https://ssl.gstatic.com/android/market/com.rovio.angrybirdsseasons/hi-256-9-347dae230614238a639d21508ae492302340b2ba",
        "http://androidblaze.com/wp-content/uploads/2011/12/tablet-pc-256x256.jpg",
        "http://www.theblaze.com/wp-content/uploads/2011/08/Apple.png",
        "http://1.bp.blogspot.com/-y-HQwQ4Kuu0/TdD9_iKIY7I/AAAAAAAAE88/3G4xiclDZD0/s1600/Twitter_Android.png",
        "http://3.bp.blogspot.com/-nAf4IMJGpc8/TdD9OGNUHHI/AAAAAAAAE8E/VM9yU_lIgZ4/s1600/Adobe%2BReader_Android.png",
        "http://cdn.geekwire.com/wp-content/uploads/2011/05/oovoo-android.png?7794fe",
        "http://icons.iconarchive.com/icons/kocco/ndroid/128/android-market-2-icon.png",
        "http://thecustomizewindows.com/wp-content/uploads/2011/11/Nicest-Android-Live-Wallpapers.png",
        "http://c.wrzuta.pl/wm16596/a32f1a47002ab3a949afeb4f",
        "http://macprovid.vo.llnwd.net/o43/hub/media/1090/6882/01_headline_Muse.jpg",
        // Special cases
        "file:///sdcard/Universal Image Loader @#&=+-_.,!()~'%20.png", // Image from SD card with encoded symbols
        "assets://Living Things @#&=+-_.,!()~'%20.jpg", // Image from assets
        "drawable://" + R.drawable.ic_launcher, // Image from drawables

        "https://www.eff.org/sites/default/files/chrome150_0.jpg", // Image from HTTPS
        "http://bit.ly/soBiXr", // Redirect link
        "http://img001.us.expono.com/100001/100001-1bc30-2d736f_m.jpg", // EXIF
        "", // Empty link
        "http://wrong.site.com/corruptedLink", // Wrong link
};

private Constants() {
}

public static class Config {
    public static final boolean DEVELOPER_MODE = false;
}

public static class Extra {
    public static final String IMAGES = "com.example.myapplication.universalimageloader.IMAGES";
    public static final String IMAGE_POSITION = "com.example.myapplication.universalimageloader.IMAGE_POSITION";
}
}

Upvotes: 1

Views: 517

Answers (1)

Juan Cort&#233;s
Juan Cort&#233;s

Reputation: 21122

imageUrls is only initialized if there is bundle data, if there isn't then when you set the adapter, the data is null. What you need to do is ensure (or check) if imageUrls is null before trying to access the properties (for example on the imageUrls.length call).

To be more specific, those lines:

if (bundle != null) {
   imageUrls = bundle.getStringArray(Constants.Extra.IMAGES);
}

Will initilize the imageUrls array only if the bundle is not null, but if it is.. it breaks.

Upvotes: 1

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