I have a navigationDrawer that I am implementing for the first time, and each time I close the navigationDrawer without selecting an option in the listVIew it reloads a fragment.... I need help on how to reorganize my code so the drawer can close without reloading the fragments each time.
Code:
public class MainDraw extends FragmentActivity {
final String[] data ={"Statistics","Discover","three"};
final String[] fragments ={
"com.beerportfolio.beerportfoliopro.StatisticsPage",
"com.beerportfolio.beerportfoliopro.Discover",
"com.beerportfolio.beerportfoliopro.FragmentThree"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActionBar().getThemedContext(), android.R.layout.simple_list_item_1, data);
final DrawerLayout drawer = (DrawerLayout)findViewById(R.id.drawer_layout);
final ListView navList = (ListView) findViewById(R.id.drawer);
navList.setAdapter(adapter);
navList.setOnItemClickListener(new AdapterView.OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> parent, View view, final int pos,long id){
drawer.setDrawerListener( new DrawerLayout.SimpleDrawerListener(){
@Override
public void onDrawerClosed(View drawerView){
super.onDrawerClosed(drawerView);
FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
tx.replace(R.id.main, Fragment.instantiate(MainDraw.this, fragments[pos]));
tx.commit();
}
});
drawer.closeDrawer(navList);
}
});
FragmentTransaction tx = getSupportFragmentManager().beginTransaction();
tx.replace(R.id.main,Fragment.instantiate(MainDraw.this, fragments[0]));
tx.commit();
}
}
Related
The problem is that the transitions wont work but all over the app is working fine. It's just the transition effects that aren't working. I've already tried all of them but no luck, the slides have their default transition. There are no errors in the codes too so I don't know what I've done wrong so please help. This is also my first app so please be kind. I didn't include the instantiateitem on pageradapter because if I do there will be a nullpointerexception. :/ I'm using JazzyViewPager for the transitions and Fragment State Pager Adapter. I've also searched for possible topics that might help me but none of them worked.
Main Activity:
Code:
public class MainActivity extends FragmentActivity {
private JazzyViewPager mJazzy;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setupJazziness(TransitionEffect.CubeIn);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add("Toggle Fade");
String[] effects = this.getResources().getStringArray(R.array.jazzy_effects);
for (String effect : effects)
menu.add(effect);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getTitle().toString().equals("Toggle Fade")) {
mJazzy.setFadeEnabled(!mJazzy.getFadeEnabled());
} else {
TransitionEffect effect = TransitionEffect.valueOf(item.getTitle().toString());
setupJazziness(effect);
}
return true;
}
private void setupJazziness(TransitionEffect effect) {
mJazzy = (JazzyViewPager) findViewById(R.id.jazzy_pager);
mJazzy.setTransitionEffect(effect);
mJazzy.setAdapter(new FragmentAdapter(getSupportFragmentManager()));
mJazzy.setPageMargin(30);
}
FragmentStatePagerAdapter:
Code:
public class FragmentAdapter extends FragmentStatePagerAdapter{
public FragmentAdapter(FragmentManager fm) {
super(fm);
// TODO Auto-generated constructor stub
}
@Override
public Fragment getItem(int position)
{
// TODO Auto-generated method stub
Fragment fragment = new Fragment1();
switch(position){
case 0:
fragment = new Fragment1();
break;
case 1:
fragment = new Fragment2();
break;
case 2:
fragment = new Fragment3();
break;
}
return fragment;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return 3;
}
@Override
public boolean isViewFromObject(View view, Object object) {
if(object != null){
return ((Fragment)object).getView() == view;
}else{
return false;
}
}
}
Fragment1:
Code:
public class Fragment1 extends Fragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View v = inflater.inflate(R.layout.fragment1_layout, null);
return v;
}
activity_main xml:
Code:
<com.jfeinstein.jazzyviewpager.JazzyViewPager xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:app1="http://schemas.android.com/apk/res/com.eight.yamjay"
android:id="@+id/jazzy_pager"
app1:style="cubeout"
android:layout_width="match_parent"
android:layout_height="match_parent" />
This is the guide that I've been following.
i am using view pager inside a fragment.
Code:
public class TabFragment extends android.support.v4.app.Fragment
{List fragments = new Vector();
PagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
[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 (getActivity().getSupportFragmentManager ());
mViewPager = (ViewPager) rootView.findViewById(R.id.pager);
setHasOptionsMenu(true);
add();
mViewPager.setAdapter(mSectionsPagerAdapter);
return rootView ;
}
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter
{
[user=439709]@override[/user]
public CharSequence getPageTitle(int position)
{Main ma=((Main)fragments.get(mViewPager.getCurrentItem()));
return ma.current;
}
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 add(){
android.support.v4.app.Fragment main=new Main();
Bundle b=new Bundle();
int p=fragments.size();
b.putString("name","");
if(p==0){
b.putInt("pos",1);}
else{
b.putInt("pos",p);}
main.setArguments(b);
fragments.add(main);
mSectionsPagerAdapter.notifyDataSetChanged();
mViewPager.setCurrentItem(p);
}
public void remove(){
int pos=mViewPager.getCurrentItem();
if(pos
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);
}
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.
In my app i just have a splash screen and a main activity. In the main thread i have three EditText boxes and a spinner with a string array. On clicking the Button, input from three EditText and spinner selection is posted to my mysql database. For the button click network operation, i used Volley since its east and i dont have to use AsyncTask which am not familiar with.
Apart from this, on entering the main UI .. app first check for network connectivity using ConnectivityManager class. After onClick app checks for empty/invalid imputs using TextUtils.
Now the problem is that when i run my app, its very slow and taking upto 65mb of RAM. IS something wrong with my code. Should i run something else as AsynTask ? Can someone check my code and refine it .. thank you
SplashActivity.java
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
public class SplashActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
int SPLASH_TIME_OUT = 5000;
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
Intent i = new Intent(SplashActivity.this, MainActivity.class);
startActivity(i);
finish();
}
}, SPLASH_TIME_OUT);
}
}
Click to expand...
Click to collapse
MainActivity.java
Code:
public class MainActivity extends Activity {
EditText name, phonenumber, address;
Button insert;
RequestQueue requestQueue;
Spinner spinner;
String insertUrl = "localhost";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Spinner s = (Spinner) findViewById(R.id.spinner);
s.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
{
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
/* CHECK INTERNET CONNECTION */
boolean mobileNwInfo;
ConnectivityManager conxMgr = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
try { mobileNwInfo = conxMgr.getActiveNetworkInfo().isConnected(); }
catch (NullPointerException e) { mobileNwInfo = false; }
if (!mobileNwInfo) {
Toast.makeText(this, "No Network, please check your connection. ", Toast.LENGTH_LONG).show();
}
/* CHECK INTERNET CONNECTION PROCEDURE DONE */
name = (EditText) findViewById(R.id.editText);
phonenumber= (EditText) findViewById(R.id.editText2);
address = (EditText) findViewById(R.id.editText3);
insert = (Button) findViewById(R.id.insert);
requestQueue = Volley.newRequestQueue(getApplicationContext());
spinner = (Spinner) findViewById(R.id.spinner);
insert.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
/* CHECK EMPTY STRING */
EditText txtUserName = (EditText) findViewById(R.id.editText);
EditText txtUserAddress = (EditText) findViewById(R.id.editText3);
EditText txtUserPhone = (EditText) findViewById(R.id.editText2);
String strUserName = name.getText().toString();
String strUserAddress = address.getText().toString();
String strUserPhone = phonenumber.getText().toString();
if(TextUtils.isEmpty(strUserName)) {
txtUserName.setError("You can't leave this empty.");
return;
}
if(TextUtils.isEmpty(strUserPhone)) {
txtUserPhone.setError("You can't leave this empty.");
return;
}
if(TextUtils.isEmpty(strUserPhone) || strUserPhone.length() < 10) {
txtUserPhone.setError("Enter a valid phone number.");
return;
}
if(TextUtils.isEmpty(strUserAddress)) {
txtUserAddress.setError("You can't leave this empty.");
return;
}
/* LOADING PROCESS DIALOG */
final ProgressDialog pd = new ProgressDialog(MainActivity.this);
pd.setMessage("Booking Service ....");
pd.show();
/* REQUEST RESPONSE/ERROR */
StringRequest request = new StringRequest(Request.Method.POST, insertUrl, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
pd.hide();
System.out.println(response);
name.setText("");
phonenumber.setText("");
address.setText("");
Toast.makeText(getApplicationContext(), "Service successfully booked !!", Toast.LENGTH_LONG).show();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
pd.hide();
Toast.makeText(getApplicationContext(), "Error: Please try again later.", Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> parameters = new HashMap<>();
parameters.put("name", name.getText().toString());
parameters.put("phonenumber", phonenumber.getText().toString());
parameters.put("address", address.getText().toString());
parameters.put("service", spinner.getItemAtPosition(spinner.getSelectedItemPosition()).toString());
return parameters;
}
};
requestQueue.add(request);
}
});
}
}
Well it's hard to say what exactly is wrong with it. Maybe text is to long. You can try to measure each operation performance with System.nanoseconds(easiest) and localize the problem first. It would be easier to say what to do with it.
Yes you should try to figure out what part is causing the problem. Try to cut the code down to essentials and measure the execution time. Maybe you will be able to tell what part exactly is not working as wanted.