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I am creating a simple app to show the images in a kind of gallery but I am unable to show the images in the view by Adapter. Always give this error Nullpointerexception
Adapter class:
public class AdapterGaleriaFragment extends BaseAdapter {
Context ctx;
List<ImageDataModel> lista;
public AdapterGaleriaFragment(Context ctx, List <ImageDataModel> lista){
this.ctx = ctx;
this.lista = lista;
}
@Override
public int getCount() {
return lista != null ? lista.size():0;
}
@Override
public Object getItem(int position) {
return lista.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = LayoutInflater.from(ctx).inflate(R.layout.layout_adapter,parent, false);
//tentativa de mostrar as imagens através do adapter
ImageDataModel img = lista.get(position);
File imgFile = new File(img.getImagePath());
if(imgFile.exists()){
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
ImageView myImage = (ImageView)view.findViewById(R.id.imageView);
myImage.setImageBitmap(myBitmap);
}else{
ImageView imageView = (ImageView)view.findViewById(R.id.imageView);
imageView.setImageResource(R.drawable.bowser2);
}
return view;
}
}
Class to load image path along with title:
public class LoaderImg {
public static List<ImageDataModel> allImages = new ArrayList<ImageDataModel>();
public static List<ImageDataModel> gettAllImages(Context ctx) {
//Remove older images to avoid copying same image twice
allImages.clear();
Uri uri;
Cursor cursor;
int column_index_data, column_index_folder_name;
String absolutePathOfImage = null, imageName;
//get all images from external storage
uri = android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
String[] projection = { MediaStore.MediaColumns.DATA,
MediaStore.Images.Media.DISPLAY_NAME };
cursor = ctx.getContentResolver().query(uri, projection, null,
null, null);
column_index_data = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA);
column_index_folder_name = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DISPLAY_NAME);
while (cursor.moveToNext()) {
absolutePathOfImage = cursor.getString(column_index_data);
imageName = cursor.getString(column_index_folder_name);
allImages.add(new ImageDataModel(imageName, absolutePathOfImage));
}
// Get all Internal storage images
uri = android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI;
cursor = ctx.getContentResolver().query(uri, projection, null,
null, null);
column_index_data = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA);
column_index_folder_name = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DISPLAY_NAME);
while (cursor.moveToNext()) {
absolutePathOfImage = cursor.getString(column_index_data);
imageName = cursor.getString(column_index_folder_name);
allImages.add(new ImageDataModel(imageName, absolutePathOfImage));
}
return allImages;
}
}
log:
Process: com.example.alex_sama.galeriramesmo, PID: 12026 java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setImageBitmap(android.graphics.Bitmap)' on a null object reference at adapter.AdapterGaleriaFragment.getView(AdapterGaleriaFragment.java:63) at android.widget.AbsListView.obtainView(AbsListView.java:2435) at android.widget.ListView.measureHeightOfChildren(ListView.java:1270) at android.widget.ListView.onMeasure(ListView.java:1182) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436) at android.widget.LinearLayout.measureVertical(LinearLayout.java:722) at android.widget.LinearLayout.onMeasure(LinearLayout.java:613) at android.view.View.measure(View.java:17562) at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1071) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:664) at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:731) at android.view.View.measure(View.java:17562) at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1071) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.widget.FrameLayout.onMeasure(FrameLayout.java:436) at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436) at android.widget.LinearLayout.measureVertical(LinearLayout.java:722) at android.widget.LinearLayout.onMeasure(LinearLayout.java:613) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.widget.FrameLayout.onMeasure(FrameLayout.java:436) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436) at android.widget.LinearLayout.measureVertical(LinearLayout.java:722) at android.widget.LinearLayout.onMeasure(LinearLayout.java:613) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.widget.FrameLayout.onMeasure(FrameLayout.java:436) at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2625) at android.view.View.measure(View.java:17562) at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2015) at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1173) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1379) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5891) 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:5281) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:375) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699) Process: com.example.alex_sama.galeriramesmo, PID: 12026 java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setImageBitmap(android.graphics.Bitmap)' on a null object reference at adapter.AdapterGaleriaFragment.getView(AdapterGaleriaFragment.java:63) at android.widget.AbsListView.obtainView(AbsListView.java:2435) at android.widget.ListView.measureHeightOfChildren(ListView.java:1270) at android.widget.ListView.onMeasure(ListView.java:1182) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436) at android.widget.LinearLayout.measureVertical(LinearLayout.java:722) at android.widget.LinearLayout.onMeasure(LinearLayout.java:613) at android.view.View.measure(View.java:17562) at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1071) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:664) at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:731) at android.view.View.measure(View.java:17562) at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:1071) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.widget.FrameLayout.onMeasure(FrameLayout.java:436) at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:135) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436) at android.widget.LinearLayout.measureVertical(LinearLayout.java:722) at android.widget.LinearLayout.onMeasure(LinearLayout.java:613) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.widget.FrameLayout.onMeasure(FrameLayout.java:436) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436) at android.widget.LinearLayout.measureVertical(LinearLayout.java:722) at android.widget.LinearLayout.onMeasure(LinearLayout.java:613) at android.view.View.measure(View.java:17562) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5536) at android.widget.FrameLayout.onMeasure(FrameLayout.java:436) at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2625) at android.view.View.measure(View.java:17562) at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2015) at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1173) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1379) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5891) at android.view.Choreographer$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$FrameDisplayEventReceiver.run(Choreographer.java:753) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5281) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:375) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)
thanks, the error was really in xml!
– AlexSusama