I've been recyclerview in my app and on scrolling it gets crashed, not under any certain use case..it just gets crashed randomly. Below is my adapter and View Holder code.
class CustomListView_Base_Adapter extends BaseExpandableListAdapter {
Context context;
private LayoutInflater inflater = null;
public CustomListView_Base_Adapter(Context context) {
this.inflater = LayoutInflater.from(context);
this.context = context;
}
@Override
public int getGroupCount() {
return dataforSubcategoryItem.size();
}
@Override
public int getChildrenCount(int groupPosition) {
return 1;
}
@Override
public Object getGroup(int groupPosition) {
return dataforSubcategoryItem.get(groupPosition);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return dataforSubcategoryItem.get(groupPosition);
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
View resultView = convertView;
final ViewHolder holder;
if (resultView == null) {
resultView = inflater.inflate(R.layout.add_subcategory_list_item, null); //TODO change layout id
holder = new ViewHolder(resultView);
resultView.setTag(holder);
} else {
holder = (ViewHolder) resultView.getTag();
}
final SubcategoryItemBean beanObj = (SubcategoryItemBean) getGroup(groupPosition);
holder.tvColumnTitle.setText(beanObj.getName());
holder.checkBox.setOnCheckedChangeListener(null);
CustomWatcher oldWatcher = (CustomWatcher) holder.etInput.getTag();
if (oldWatcher != null)
holder.etInput.removeTextChangedListener(oldWatcher);
if (beanObj.isColumnSelected()) {
holder.checkBox.setChecked(true);
holder.etInput.setText(dataforSubcategoryItem.get(groupPosition).getLabel());
holder.etInput.setEnabled(true);
listView.expandGroup(groupPosition);
} else {
holder.checkBox.setChecked(false);
holder.etInput.setText("");
holder.etInput.setEnabled(false);
listView.collapseGroup(groupPosition);
}
CustomWatcher newWatcher = new CustomWatcher(groupPosition, holder.etInput);
holder.etInput.setTag(newWatcher);
holder.etInput.addTextChangedListener(newWatcher);
holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
dataforSubcategoryItem.get(groupPosition).setColumnSelected(true);
} else {
dataforSubcategoryItem.get(groupPosition).setColumnSelected(false);
}
notifyDataSetChanged();
}
});
return resultView;
}
@Override
public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
View resultView = convertView;
final ViewHolder holder;
if (resultView == null) {
resultView = inflater.inflate(R.layout.child_list_item, null); //TODO change layout id
holder = new ViewHolder(resultView, context);
resultView.setTag(holder);
} else {
holder = (ViewHolder) resultView.getTag();
}
final SubcategoryItemBean beanObj = (SubcategoryItemBean) getChild(groupPosition, childPosition);
CustomWatcher oldWatcher = (CustomWatcher) holder.defaultValues.getTag();
if (oldWatcher != null)
holder.defaultValues.removeTextChangedListener(oldWatcher);
holder.radiogroup.setOnCheckedChangeListener(null);
holder.defaultValues.setText(beanObj.getValue());
if (beanObj.getInput_type().equalsIgnoreCase(getString(R.string.column_type_text))) {
holder.defaultValues.setInputType(InputType.TYPE_CLASS_TEXT);
holder.defaultValues.setHint("Enter Default Value");
holder.rbText.setChecked(true);
} else if (beanObj.getInput_type().equalsIgnoreCase(getString(R.string.column_type_number))) {
holder.defaultValues.setInputType(InputType.TYPE_CLASS_NUMBER);
holder.defaultValues.setHint("Enter Default Value");
holder.rbNumber.setChecked(true);
} else if (beanObj.getInput_type().equalsIgnoreCase(getString(R.string.column_type_radiobutton))) {
holder.defaultValues.setInputType(InputType.TYPE_CLASS_TEXT);
holder.defaultValues.setHint("Enter comma separated values");
holder.rbRadioButton.setChecked(true);
} else if (beanObj.getInput_type().equalsIgnoreCase(getString(R.string.column_type_checkbox))) {
holder.rbCheckbox.setChecked(true);
holder.defaultValues.setHint("Enter comma separated values");
holder.defaultValues.setInputType(InputType.TYPE_CLASS_TEXT);
} else {
holder.rbDropdown.setChecked(true);
holder.defaultValues.setHint("Enter comma separated values");
holder.defaultValues.setInputType(InputType.TYPE_CLASS_TEXT);
}
holder.radiogroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, @IdRes int checkedId) {
RadioButton button = (RadioButton) group.findViewById(group.getCheckedRadioButtonId());
dataforSubcategoryItem.get(groupPosition).setInput_type(button.getText().toString());
holder.defaultValues.setText("");
notifyDataSetChanged();
}
});
CustomWatcher newWatcher = new CustomWatcher(groupPosition, holder.defaultValues);
holder.defaultValues.setTag(newWatcher);
holder.defaultValues.addTextChangedListener(newWatcher);
return resultView;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return false;
}
private class CustomWatcher implements TextWatcher {
private int position;
private EditText editText;
private CustomWatcher(int position, EditText editText) {
this.position = position;
this.editText = editText;
}
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
if (editText.getId() == R.id.addCategory_chooseItem_EditText) {
dataforSubcategoryItem.get(position).setLabel(editable.toString().trim());
System.out.println("CustomWatcher.onTextChanged label" + editable.toString());
}
if (editText.getId() == R.id.defaultValues_addSubCategory_chooseItem) {
dataforSubcategoryItem.get(position).setValue(editable.toString().trim());
System.out.println("CustomWatcher.afterTextChanged default value " + editable.toString());
}
}
}
}
class ViewHolder {
CheckBox checkBox;
TextView tvColumnTitle;
EditText etInput;
RadioGroup radiogroup;
RadioButton rbText, rbNumber, rbRadioButton, rbCheckbox, rbDropdown;
EditText defaultValues;
LinearLayout columnDetailsLayout;
public ViewHolder(View view) {
checkBox = (CheckBox) view.findViewById(R.id.addCategory_chooseItem_Checkbox);
tvColumnTitle = (TextView) view.findViewById(R.id.addCategory_chooseItem_TextView);
etInput = (EditText) view.findViewById(R.id.addCategory_chooseItem_EditText);
}
public ViewHolder(View view, Context context) {
columnDetailsLayout = (LinearLayout) view.findViewById(R.id.columnDetailsLayout);
radiogroup = (RadioGroup) view.findViewById(R.id.radiogroup_addSubCategory_chooseItem);
rbText = (RadioButton) view.findViewById(R.id.rbText_addSubCategory_chooseItem);
rbNumber = (RadioButton) view.findViewById(R.id.rbNumber_addSubCategory_chooseItem);
rbRadioButton = (RadioButton) view.findViewById(R.id.rbRadioButton_addSubCategory_chooseItem);
rbCheckbox = (RadioButton) view.findViewById(R.id.rbCheckbox_addSubCategory_chooseItem);
rbDropdown = (RadioButton) view.findViewById(R.id.rbDropdown_addSubCategory_chooseItem);
defaultValues = (EditText) view.findViewById(R.id.defaultValues_addSubCategory_chooseItem);
rbText.setChecked(true);
}
}
This is the output:
This is the error I'm getting after app gets crashed
E/AndroidRuntime: FATAL EXCEPTION: main
Process: global.edios.inventorymanagementtabletapp, PID: 2927
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.drawable.Drawable.setBounds(android.graphics.Rect)' on a null object reference
at android.widget.ExpandableListView.drawDivider(ExpandableListView.java:536)
at android.widget.ListView.dispatchDraw(ListView.java:3288)
at android.widget.ExpandableListView.dispatchDraw(ExpandableListView.java:353)
at android.view.View.draw(View.java:15234)
at android.widget.AbsListView.draw(AbsListView.java:4110)
at android.view.View.updateDisplayListIfDirty(View.java:14167)
at android.view.View.getDisplayList(View.java:14189)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3389)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3368)
at android.view.View.updateDisplayListIfDirty(View.java:14127)
at android.view.View.getDisplayList(View.java:14189)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3389)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3368)
at android.view.View.updateDisplayListIfDirty(View.java:14127)
at android.view.View.getDisplayList(View.java:14189)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3389)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3368)
at android.view.View.updateDisplayListIfDirty(View.java:14127)
at android.view.View.getDisplayList(View.java:14189)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3389)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3368)
at android.view.View.updateDisplayListIfDirty(View.java:14127)
at android.view.View.getDisplayList(View.java:14189)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:273)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:279)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:318)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2530)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2352)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1982)
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$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Please help. Thanks.
