Database Users

Help With Grid Views

Hi everyone I'am using to grid view when i click an item on grid view 1 it should be added to grid view 2
It is added but the grid view one is scrambled up
Here is the code
Code:
mImageViews = new ArrayList<WeakReference<ImageView>>();
private ArrayList<String> mImageRepositoryTh = new ArrayList<String>(); //Thumbnails size image paths
private ArrayList<String> mImageRepositoryFu = new ArrayList<String>();//Full size image paths
private ArrayList<WeakReference<ImageView>> mWeakReferences = new ArrayList<WeakReference<ImageView>>();
private GridView mListView;
private GridView mSelected;
mListView = (GridView)findViewById(R.id.images_view);
mListView.setAdapter(new ImageAdapter(this));
mSelected = (GridView)findViewById(R.id.images_view_sel);
mChecked = new boolean[mListView.getCount()];
Log.e("ERR", "Array Length "+String.valueOf(mChecked.length));
mListView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
mChecked[arg2] = !mChecked[arg2];
mWeakReferences.add(new WeakReference<ImageView>((ImageView)arg1));
mSelected.setAdapter(new SelectedImageAdapter());
}
});
Code:
Adapters
public class ImageAdapter extends BaseAdapter
{
public ImageAdapter(@SuppressWarnings("unused")Context c)
{
}
public int getCount() {
return mImageRepositoryTh.size();
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return position;
}
private boolean loadingFailed = false;
public View getView(int position, View convertView, ViewGroup parent) {
final ImageView imageView;
if(convertView != null)
{
try
{
if (mImageViews.get(position).get() != null)
{
return mImageViews.get(position).get();
}
}
catch(IndexOutOfBoundsException E)
{
Log.e("Not Yet Inflate", "Array Index Out \n", E);
}
}
imageView = (ImageView) getLayoutInflater().inflate(R.layout.item_grid_image, parent, false);
mImageLoader.displayImage("file://"+mImageRepositoryTh.get(position), imageView, mOptions,new
ImageLoadingListener() {
public void onLoadingStarted(String imageUri, View view) {
// TODO Auto-generated method stub
}
public void onLoadingFailed(String imageUri, View view,
FailReason failReason) {
// TODO Auto-generated method stub
loadingFailed = true;
}
public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
// TODO Auto-generated method stub
}
public void onLoadingCancelled(String imageUri, View view) {
// TODO Auto-generated method stub
}
});
if (loadingFailed) {
mImageLoader.displayImage("file://"+mImageRepositoryFu.get(position),imageView ,mOptions);
loadingFailed = false;
}
mImageViews.add(new WeakReference<ImageView>(imageView));
return imageView;
}
}
private class SelectedImageAdapter extends BaseAdapter
{
public SelectedImageAdapter()
{
}
[user=439709]@override[/user]
public int getCount() {
return mWeakReferences.size();
}
[user=439709]@override[/user]
public Object getItem(int i) {
return null;
}
[user=439709]@override[/user]
public long getItemId(int i) {
return i;
}
[user=439709]@override[/user]
public View getView(int position, View convertView, ViewGroup parent)
{
WeakReference<ImageView> iViewRef = mWeakReferences.get(position);
return iViewRef.get();
}
}
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[q][solved]View Pager doesnt adds fragments to backstack

i have made a fragment which contains view pager.it uses list of fragments so that fragments can be added or removed dynamically.
each child fragment of viewpager is a listfragment and loads list using asynctask
now my problem is when i have 3-4 child fragments in view pager,after switching to other pages(tabs),the earlier ones in which list is already loaded are reset automatically when i swipe back to them.so i want that they must be added to backstact so that they can be resumed.
Code:
public class TabFragment extends android.support.v4.app.Fragment {
List fragments = new ArrayList();
public PagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
String home;
ActionBar actionBar;
[user=439709]@override[/user]
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.tabfragment,
container, false);
mSectionsPagerAdapter = new ScreenSlidePagerAdapter(getChildFragmentManager());
mViewPager = (ViewPager) rootView.findViewById(R.id.pager);
actionBar = getActivity().getActionBar();
mViewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
public void onPageScrolled(int p1, float p2, int p3) {
// TODO: Implement this method
}
public void onPageSelected(int p1) { // TODO: Implement this// method
Main ma = ((Main) fragments.get(p1));
if (ma.current != null) {
ma.bbar(ma.current);
}
}
public void onPageScrollStateChanged(int p1) {
// TODO: Implement this method
}
});
mViewPager.setAdapter(mSectionsPagerAdapter);
return rootView;
}
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
[user=439709]@override[/user]
public CharSequence getPageTitle(int position) {
//Toast.makeText(getActivity(),""+position,Toast.LENGTH_SHORT).show();
Main ma = ((Main) fragments.get(position));
return new File(ma.current).getName();
}
public int getCount() {
// TODO: Implement this method
return fragments.size();
}
public ScreenSlidePagerAdapter(android.support.v4.app.FragmentManager fm) {
super(fm);
}
[user=439709]@override[/user]
public android.support.v4.app.Fragment getItem(int position) {
android.support.v4.app.Fragment f;
f = fragments.get(position);
return f;
}
}
public void removePage(int position) {
if(position==0){Toast.makeText(getActivity(),"Main Screen Cant be removed",Toast.LENGTH_LONG).show();}else{
fragments.remove(position);
mSectionsPagerAdapter.notifyDataSetChanged();
mViewPager.setCurrentItem(position-1);
}
}
public void add(String text) {
android.support.v4.app.Fragment main = new Main();
Bundle b = new Bundle();
int p = fragments.size();
b.putString("path", text);
b.putInt("pos", p);
main.setArguments(b);
fragments.add(main);
mSectionsPagerAdapter.notifyDataSetChanged();
mViewPager.setCurrentItem(p);
}

[Q] GPS with Fragment

Good day. I start learn Fragment and I want use GPS in my Application. and I use Fragment. in fragment who view coordinate i writed next code
Code:
public class MyFragment2 extends Fragment {
public static final String BUTTON_INDEX = "button_index";
private static final int BUTTON_INDEX_DEFAULT = -1;
static TextView txt;
static TextView txt2;
String[] mCatDescription;
public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle saveInstanceState){
View viewHier = inflater.inflate(R.layout.fragment2, container, false);
txt = (TextView)viewHier.findViewById(R.id.textView1);
txt2 = (TextView)viewHier.findViewById(R.id.textView2);
mCatDescription =getResources().getStringArray(R.array.cats);
Bundle args = getArguments();
int buttonIndex = args != null ? args.getInt(BUTTON_INDEX, BUTTON_INDEX_DEFAULT):BUTTON_INDEX_DEFAULT;
if(buttonIndex != BUTTON_INDEX_DEFAULT){
setDiscription(buttonIndex);
}
return viewHier;
}
public void setDiscription(int buttonIndex){
GPSWork gpsWork = new GPSWork();
switch(buttonIndex){
case 1:
txt2.setText("one");
break;
case 2:
gpsWork.GetCoordinates();
break;
case 3:
txt2.setText("therd");
break;
}
}
}
Ok. when we click on button 2 we call method GetCoordinates(). this class have next code
Code:
public class GPSWork{
LocationManager locationManager;
public GPSWork(){
locationManager = (LocationManager)MainActivity.mContext.getSystemService(Context.LOCATION_SERVICE);
}
public void GetCoordinates(){
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
5000, 5, locationListener);
}
private LocationListener locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
MyFragment2.txt2.setText("OK");
}
@Override
public void onProviderDisabled(String provider) {
MyFragment2.txt2.setText("OK");
}
@Override
public void onProviderEnabled(String provider) {
MyFragment2.txt2.setText("OK");
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
MyFragment2.txt2.setText("OK");
}
};
}
how we see, we should get text OK on TextView on MainActivity. but we don't have text, whats wrong? and if I change code in method GetCoordinates() on
Code:
public void GetCoordinates(){
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
1000, 10, locationListener);
}
all work fine, i see text in TextView (OK )

Passing data between two fragments

Hello guys,
I have a list of fragments created and I want to delete these fragment by long pressing on them. However, before doing so I want dialog fragment to pop up and offer the user the choice to delete or not. I have created the two fragments but I can't get the data across each other. I can't give functionality to the 'OK' button. Here is my code:
Code:
public class CourseListFragment extends Fragment implements
OnItemClickListener, OnItemLongClickListener {
public static final String ARG_ITEM_ID = "course_list";
public static final String YES_NO = "modify";
Activity activity;
ListView courseListView;
ArrayList<Course> courses;
CourseListAdapter courseListAdapter;
CourseDAO courseDAO;
private GetEmpTask task;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
activity = getActivity();
courseDAO = new CourseDAO(activity);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.schedule_fragment_course_list,
container, false);
findViewsById(view);
task = new GetEmpTask(activity);
task.execute((Void) null);
courseListView.setOnItemClickListener(this);
courseListView.setOnItemLongClickListener(this);
return view;
}
private void findViewsById(View view) {
courseListView = (ListView) view.findViewById(R.id.list_course);
}
@Override
public void onItemClick(AdapterView<?> list, View view, int position,
long id) {
Course course = (Course) list.getItemAtPosition(position);
if (course != null) {
Bundle arguments = new Bundle();
arguments.putParcelable("selectedCourse", course);
CustomCourseDialogFragment customEmpDialogFragment = new CustomCourseDialogFragment();
customEmpDialogFragment.setArguments(arguments);
customEmpDialogFragment.show(getFragmentManager(),
CustomCourseDialogFragment.ARG_ITEM_ID);
}
}
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view,
int position, long id) {
// Show dialogFragment
FragmentManager fm = getActivity().getSupportFragmentManager();
CheckDialogFragment dialog = new CheckDialogFragment();
dialog.show(fm, YES_NO);
Course employee = (Course) parent.getItemAtPosition(position);
// Use AsyncTask to delete from database
courseDAO.deleteEmployee(employee);
courseListAdapter.remove(employee);
return true;
}
public class GetEmpTask extends AsyncTask<Void, Void, ArrayList<Course>> {
private final WeakReference<Activity> activityWeakRef;
public GetEmpTask(Activity context) {
this.activityWeakRef = new WeakReference<Activity>(context);
}
@Override
protected ArrayList<Course> doInBackground(Void... arg0) {
ArrayList<Course> courseList = courseDAO.getCourses();
return courseList;
}
@Override
protected void onPostExecute(ArrayList<Course> empList) {
if (activityWeakRef.get() != null
&& !activityWeakRef.get().isFinishing()) {
courses = empList;
if (empList != null) {
if (empList.size() != 0) {
courseListAdapter = new CourseListAdapter(activity,
empList);
courseListView.setAdapter(courseListAdapter);
} else {
Toast.makeText(activity, "No Course Records",
Toast.LENGTH_LONG).show();
}
}
}
}
}
/*
* This method is invoked from MainActivity onFinishDialog() method. It is
* called from CustomEmpDialogFragment when an employee record is updated.
* This is used for communicating between fragments.
*/
public void updateView() {
task = new GetEmpTask(activity);
task.execute((Void) null);
}
@Override
public void onResume() {
getActivity().setTitle("Course Schedule");
getActivity().getActionBar().setTitle("Course Schedule");
super.onResume();
}
}
//Dialog Fragment
Code:
public class CheckDialogFragment extends DialogFragment {
CourseListAdapter courseListAdapter;
CourseDAO courseDAO;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// TODO Auto-generated method stub
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity())
.setTitle("Do you want to delete?")
.setPositiveButton(android.R.string.ok,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
// TODO Auto-generated method stub
}
})
.setNegativeButton(android.R.string.cancel,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
// TODO Auto-generated method stub
dialog.cancel();
}
});
return builder.create();
}
}
I have problems trying to get the data from onItemLongClick() of CourseListFragment to CourseListFragment. Any help would be greatly appreciated.

[SOLVED] Android getParentFragment() returns null in ViewPager within a Fragment

I have an Activity that contains a Fragment with a ViewPager. Then I call a method of a Fragment within the ViewPager. But if that Fragment then calls getParentFragment(), it returns null.
Why is getParentFragment() null?
The main Fragment that contains a ViewPager:
Code:
public class MyFragment extends Fragment {
private TabLayout mTabLayout;
private ViewPager mViewPager;
private ViewPagerAdapter mAdapter;
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
View view = getView();
// Setup the ViewPager
mViewPager = (ViewPager) view.findViewById(R.id.container);
setupViewPager(mViewPager);
// Setup the TabLayout
mTabLayout = (TabLayout) view.findViewById(R.id.tabs);
mTabLayout.setupWithViewPager(mViewPager);
}
// This method is called from Activity
public void callNestedFragment() {
if (isDetached()) {
return;
}
((Fragment0) mViewPager.getItem(0)).testMethod();
}
}
The nested Fragment (inside mViewPager):
Code:
public class Fragment0 extends Fragment {
...
public void testMethod() {
if (isDetached()) {
return;
}
// Why is getParentFragment() null?
Log.i(TAG, "Parent fragment:" + getParentFragment());
return;
}
}
The ViewPagerAdapter:
Code:
public class ViewPagerAdapter extends FragmentPagerAdapter {
private Context mContext;
public ViewPagerAdapter(FragmentManager manager, Context context) {
super(manager);
mContext = context;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new Fragment0();
case 1:
return new Fragment1();
case 2:
return new Fragment2();
case 3:
return new Fragment3();
case 4:
return new Fragment4();
}
return null;
}
@Override
public int getCount() {
return 5;
}
}
If more code is needed, please let me know. Thanks for your help.

Info
SuperThomasLab said:
I have an Activity that contains a Fragment with a ViewPager. Then I call a method of a Fragment within the ViewPager. But if that Fragment then calls getParentFragment(), it returns null.
Why is getParentFragment() null?
The main Fragment that contains a ViewPager:
Code:
public class MyFragment extends Fragment {
private TabLayout mTabLayout;
private ViewPager mViewPager;
private ViewPagerAdapter mAdapter;
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
View view = getView();
// Setup the ViewPager
mViewPager = (ViewPager) view.findViewById(R.id.container);
setupViewPager(mViewPager);
// Setup the TabLayout
mTabLayout = (TabLayout) view.findViewById(R.id.tabs);
mTabLayout.setupWithViewPager(mViewPager);
}
// This method is called from Activity
public void callNestedFragment() {
if (isDetached()) {
return;
}
((Fragment0) mViewPager.getItem(0)).testMethod();
}
}
The nested Fragment (inside mViewPager):
Code:
public class Fragment0 extends Fragment {
...
public void testMethod() {
if (isDetached()) {
return;
}
// Why is getParentFragment() null?
Log.i(TAG, "Parent fragment:" + getParentFragment());
return;
}
}
The ViewPagerAdapter:
Code:
public class ViewPagerAdapter extends FragmentPagerAdapter {
private Context mContext;
public ViewPagerAdapter(FragmentManager manager, Context context) {
super(manager);
mContext = context;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new Fragment0();
case 1:
return new Fragment1();
case 2:
return new Fragment2();
case 3:
return new Fragment3();
case 4:
return new Fragment4();
}
return null;
}
@Override
public int getCount() {
return 5;
}
}
If more code is needed, please let me know. Thanks for your help.
Click to expand...
Click to collapse
Post Full Logcat Error & Fragment Class
:good:

I found the answer. If isDetached() is true, it doesn't mean getParentFragment() is not null.
So instead of the previous check in testMethod(), this is the new code:
Code:
public void testMethod() {
if (isDetached() && getParentFragment() != null) {
return;
}
...
}
I also now call the same method again in the onStart() method within Fragment0, where getParentFragment() should not be null.