Spinner has data but doesn't have any preview text/selected text - android-studio

Spinner has data but doesn't have any preview text/selected text I try various things and still doesn't show any text
Im trying to use spinner for some data and I successfully populated some list for spinner data but it doesn't show any in the spinner.
I also try various things i saw from the net and it didnt work.
Here is the link where I based my code for spinner: https://www.youtube.com/watch?v=j7P5k-dHS9Y
JAVA CODE:
public class SpinnerSample extends AppCompatActivity {
Spinner spinner;
boolean isSpinnerTouched = false;
DatabaseReference databaseReference;
String[] status = {"Not Available", "Available", "Under Maintenance"};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_spinner_sample);
spinner = findViewById(R.id.spiiner);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(SpinnerSample.this, R.layout.style_spinner, status);
adapter.setDropDownViewResource(R.layout.style_spinner);
spinner.setAdapter(adapter);
databaseReference = FirebaseDatabase.getInstance().getReference();
spinner.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
isSpinnerTouched = true;
return false;
}
});
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
String value = adapterView.getItemAtPosition(i).toString();
if (!isSpinnerTouched) {
Toast.makeText(SpinnerSample.this, "No Selected", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(SpinnerSample.this, value, Toast.LENGTH_SHORT).show();
}
}
});
}
}
XML CODE:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".SpinnerSample">
<Spinner
android:id="#+id/spiiner"
android:layout_width="240dp"
android:background="#ff0"
android:layout_height="40dp"
android:textColor="#000"
android:hint="Current Password"
android:layout_marginTop="10dp"/>
</LinearLayout>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:text="A"
android:padding="20dp"
android:layout_height="match_parent"
android:textColor="#000"
android:textColorHint="#1e7591">
</TextView>

Related

My app Crashes after creating a button to a RelativeLayout

I want to create a viewpager that uses relative layout.
but before that screen pops out, i have a constraintlayout screen.
So i create a button to direct me to that viewpager, but app crashes and i dont know why...
Java:
public class TelaPrincipal extends AppCompatActivity {
private Button bt_to_treinos;
FirebaseFirestore db = FirebaseFirestore.getInstance();
String usuarioID;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tela_principal);
getSupportActionBar().hide();
IniciarComponentes();
//THIS BUTTON OVER HERE
bt_to_treinos.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(TelaPrincipal.this,SlideAdapter.class);
startActivity(intent);
}
});
}
}
i did 2 RelativeLayouts:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="#+id/slide_image"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_marginLeft="100dp"
android:layout_marginTop="80dp"
android:src="#drawable/segunda" />
<TextView
android:id="#+id/slide_heading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="350dp"
android:layout_marginLeft="110dp"
android:text="Segunda"
android:textColor="#color/white"
android:textSize="50sp"
android:textStyle="bold"
/>
<TextView
android:id="#+id/slide_desc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="500dp"
android:text="#string/example"
android:textColor="#color/white"
android:textSize="15sp"
android:textStyle="bold" />
Second one:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".treinos"
android:background="#drawable/background"
>
<androidx.viewpager.widget.ViewPager
android:id="#+id/slideViewPager"
android:layout_width="match_parent"
android:layout_height="650dp" />
this screen should appear but crashes:
public class treinos extends AppCompatActivity {
private ViewPager mSlideViewPager;
private LinearLayout mDotLayout;
private TextView[] mDots;
private SlideAdapter sliderAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_treinos);
getSupportActionBar().hide();
mSlideViewPager = findViewById(R.id.slideViewPager);
sliderAdapter = new SlideAdapter(this);
mSlideViewPager.setAdapter(sliderAdapter);
}}
Slidepager class other java code:
public class SlideAdapter extends PagerAdapter {
Context context;
LayoutInflater layoutInflater;
public SlideAdapter(Context context){
this.context = context;
}
//Arrays
public int [] slide_images = {
R.drawable.segunda,
R.drawable.terca,
R.drawable.quarta,
R.drawable.quinta,
R.drawable.sexta,
R.drawable.sabado,
R.drawable.domingo
};
public String[] slide_headings = {
"Segunda",
"Terça",
"Quarta",
"Quinta",
"Sexta",
"Sábado",
"Domingo"
};
public String[] slide_descs = {
"Btest1",
"test 2",
"test 3",
"test 4",
"test 5",
"test 6",
"test 7 "
};
#Override
public int getCount() {
return slide_headings.length;
}
#Override
public boolean isViewFromObject(View view, Object o) {
return view == (RelativeLayout) o;
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
layoutInflater = (LayoutInflater)
context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(R.layout.slide_layout, container, false);
ImageView slideImageView = (ImageView) view.findViewById(R.id.slide_image );
TextView slideHeading = (TextView) view.findViewById(R.id.slide_heading );
TextView slideDescription = (TextView) view.findViewById(R.id.slide_desc);
slideImageView.setImageResource(slide_images[position]);
slideHeading.setText(slide_headings[position]);
slideDescription.setText(slide_descs[position]);
container.addView(view);
return view;
}
#Override
public void destroyItem(#NonNull ViewGroup container, int position, #NonNull Object object) {
container.removeView((RelativeLayout) object);
}}
Thankyou Everyone

Recycle View android Studio search well but just shows 1 item

Here a beginner at Android studio.
I'm creating a simple agenda app, where you can add, edit, delete and search contacts.
I used a recycle view but after adding the search option, the recycle view just shows me one contact.
The contacts are being added as appear when I search for them.
Any idea on how to fix it?
It tried changing the layout but nothing works.
My main activity.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<SearchView
android:id="#+id/txtBuscar"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/listacontactos"
android:layout_width="match_parent"
android:layout_height="591dp" />
</LinearLayout>
</LinearLayout>
Here is the Adapter: https://github.com/soymartanegro/agendaApp/blob/main/src/main/java/com/example/agenda/adaptadores/ListaContactosAdapter.java
Main Java: https://github.com/soymartanegro/agendaApp/blob/main/src/main/java/com/example/agenda/MainActivity.java
Thanks a lot.
I have used the below code it's working perfectly. Please check it. Currently, I'm using dummy data for testing purposes.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<SearchView
android:id="#+id/txtBuscar"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/listacontactos"
android:layout_width="match_parent"
android:layout_height="591dp" />
</LinearLayout>
</LinearLayout>
lista_item_contacto.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/viewNombre"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout>
contactos
public class contactos {
String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
ListaContactosAdapter.java
public class ListaContactosAdapter extends RecyclerView.Adapter<ListaContactosAdapter.ContactoViewHolder> {
ArrayList<contactos> listaContactos;
ArrayList<contactos> listaOriginal;
public ListaContactosAdapter(ArrayList<contactos> listaContactos){
this.listaContactos = listaContactos;
listaOriginal = new ArrayList<>();
listaOriginal.addAll(listaContactos);
}
#NonNull
#Override
public ContactoViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.lista_item_contacto, null , false);
return new ContactoViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull ContactoViewHolder holder, int position) {
holder.viewName.setText(listaContactos.get(position).getName());
}
public void filtrado(String txtBuscar){
int longitud = txtBuscar.length();
if (longitud == 0){
listaContactos.clear();
listaContactos.addAll(listaOriginal);
} else {
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
List<contactos> collecion = listaContactos.stream().filter(i->i.getName().toLowerCase().contains(txtBuscar.toLowerCase()))
.collect(Collectors.toList());
listaContactos.clear();
listaContactos.addAll(collecion);
} else {
for(contactos c: listaOriginal){
if (c.getName().toLowerCase().contains(txtBuscar.toLowerCase())){
listaContactos.add(c);
}
}
}
}
notifyDataSetChanged();
}
#Override
public int getItemCount() {
return listaContactos.size();
}
public class ContactoViewHolder extends RecyclerView.ViewHolder {
TextView viewName, viewTelephone, viewEmail;
public ContactoViewHolder(#NonNull View itemView) {
super(itemView);
viewName = itemView.findViewById(R.id.viewNombre);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Context context = view.getContext();
}
});
}
}
}
MainActivity.java
public class MainActivity extends AppCompatActivity implements SearchView.OnQueryTextListener{
SearchView txtBuscar;
RecyclerView listaContactos;
ArrayList<contactos> listaArrayContactos;
ListaContactosAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txtBuscar = findViewById(R.id.txtBuscar);
listaContactos = findViewById(R.id.listacontactos);
listaContactos.setLayoutManager(new LinearLayoutManager(this));
listaArrayContactos = new ArrayList<>();
contactos c1 = new contactos();
c1.setName("Hello");
contactos c2 = new contactos();
c2.setName("Android");
contactos c3 = new contactos();
c3.setName("Studio");
listaArrayContactos.add(c1);
listaArrayContactos.add(c2);
listaArrayContactos.add(c3);
adapter = new ListaContactosAdapter(listaArrayContactos);
listaContactos.setAdapter(adapter);
//Revisar si no funciona y cambiar de lugar
txtBuscar.setOnQueryTextListener(this);
}
#Override
public boolean onQueryTextSubmit(String s) {
return false;
}
#Override
public boolean onQueryTextChange(String s) {
adapter.filtrado(s);
return false;
}
}

Integrating google sign in, sign in button visibility not changing on UpdateUI method

I am trying to integrate a google sign in feature for my app. Its mostly working fine and I can sign in ok.
However, when the user is signed in, the sign in buttons visibility is supposed to be false, and then a LinearLayout which includes two text views and a log out button is supposed to become visible.
Here is the code of the main layout activity which has all the text views, buttons etc
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<LinearLayout
android:id="#+id/prof_section"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginTop="50dp"
android:orientation="horizontal">
<ImageView
android:id="#+id/Prof_Pic"
android:layout_width="90dp"
android:layout_height="wrap_content"
tools:srcCompat="#tools:sample/avatars" />
<LinearLayout
android:layout_width="255dp"
android:layout_height="wrap_content"
android:layout_marginLeft="28dp"
android:layout_marginTop="20dp"
android:layout_marginRight="20dp"
android:orientation="vertical">
<TextView
android:id="#+id/Name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Display name here"
android:textSize="18dp"
android:textStyle="bold" />
<TextView
android:id="#+id/Email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:gravity="center"
android:text="Display email here"
android:textSize="12dp"
android:textStyle="bold" />
<Button
android:id="#+id/SignOut"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Logout"
tools:layout_editor_absoluteX="159dp"
tools:layout_editor_absoluteY="506dp" />
</LinearLayout>
</LinearLayout>
<com.google.android.gms.common.SignInButton
android:id="#+id/sign_in_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="60dp"
android:layout_marginRight="50dp"
android:layout_marginLeft="50dp"/>
</LinearLayout>
Here is the Main Activity file with all the code
private LinearLayout prof_section;
private LinearLayout LsignIn;
private Button SignOut;
private SignInButton SignIn;
private TextView Name,Email;
private ImageView Prof_Pic;
private GoogleApiClient GoogleApiClient;
private static final int REQ_CODE = 9001;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//setting variables as correct object
prof_section = (LinearLayout)findViewById(R.id.prof_section);
SignOut = (Button)findViewById(R.id.SignOut);
SignIn = (SignInButton)findViewById(R.id.sign_in_button);
Name = (TextView)findViewById(R.id.Name);
Email = (TextView)findViewById(R.id.Email);
Prof_Pic = (ImageView)findViewById(R.id.Prof_Pic);
//register buttons for onclick listener
SignIn.setOnClickListener(this);
SignOut.setOnClickListener(this);
//setting linearlayout and button to visible/invisible
prof_section.setVisibility(View.GONE);
SignIn.setVisibility(View.VISIBLE);
GoogleSignInOptions SignInOptions = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN).requestEmail ().build();
GoogleApiClient = new GoogleApiClient.Builder(this).enableAutoManage(this,this).addApi(Auth.GOOGLE_ SIGN_IN_API,SignInOptions).build();
}
protected void onStart() {
super.onStart();
}
#Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.sign_in_button:
SignIn();
break;
case R.id.SignOut:
SignOut();
break;
}
}
#Override
public void onConnectionFailed(#NonNull ConnectionResult connectionResult) {
}
private void SignIn() {
Intent intent = Auth.GoogleSignInApi.getSignInIntent(GoogleApiClient);
startActivityForResult(intent,REQ_CODE);
}
private void SignOut() {
Auth.GoogleSignInApi.signOut(GoogleApiClient).setResultCallback(new ResultCallback<Status>() {
#Override
public void onResult(#NonNull Status status) {
UpdateUI(false);
}
});
}
private void handleResult(GoogleSignInResult result) {
if(result.isSuccess())
{
GoogleSignInAccount account = result.getSignInAccount();
String name = account.getDisplayName();
String email = account.getEmail();
String img_url = account.getPhotoUrl().toString();
Name.setText(name);
Email.setText(email);
//Glide.vith(this).load(img_url).into(Prof_Pic);
UpdateUI(true);
}
else
{
UpdateUI(false);
}
}
private void UpdateUI(boolean isLogin) {
if(isLogin)
{
prof_section.setVisibility(View.VISIBLE);
SignIn.setVisibility(View.GONE);
}
else
{
prof_section.setVisibility(View.GONE);
SignIn.setVisibility(View.VISIBLE);
}
Im getting no error messages when I run the app
Since you are calling activitywithresult() function which returns the result, So you will get the result in onActivityResult(). As you are not having any Result handler you are not able to handle the result. You need to add onActivityResult(). If you get the result their, then you have to call your function handleResult() to know whether user is successfully signed in or not.
Just add this code:
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// Result returned from launching the Intent from GoogleSignInClient.getSignInIntent(...);
if (requestCode == REQ_CODE) {
// The Task returned from this call is always completed, no need to attach
// a listener.
Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
handleResult(task);
}
}
private void handleResult(Task<GoogleSignInAccount> completedTask) {
try {
GoogleSignInAccount account = completedTask.getResult(ApiException.class);
String name = account.getDisplayName();
String email = account.getEmail();
String img_url = account.getPhotoUrl().toString();
Name.setText(name);
Email.setText(email);
//Glide.vith(this).load(img_url).into(Prof_Pic);
UpdateUI(true);
} catch (ApiException e) {
// The ApiException status code indicates the detailed failure reason.
// Please refer to the GoogleSignInStatusCodes class reference for more information.
Log.w(TAG, "signInResult:failed code=" + e.getStatusCode());
UpdateUI(false);
}
}

Strange ListView behavior [faster performance]

I find this very strange behavior of listview and it acts differently on Android 2.1 and 4.1
Here are the 2 classes I wrote which google advises to use for faster performance of ListView.
How to reproduce: Add an entry, check the first checkbox, then add more entries than one page. The checked box floats through the elements!
Here is a small project I wrote: http://tinyurl.com/strange-listview
Anyone can explain the issue or a workaround?
public class AlarmManagerActivity extends Activity {
private PerformanceArrayAdapter mPerformaceArrayAdapter;
private ListView mListView;
private ArrayList<String> mListItems = new ArrayList<String>();
private int mCounter = 0;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mListView = (ListView) findViewById(R.id.listViewCondition);
mPerformaceArrayAdapter = new PerformanceArrayAdapter(this, mListItems);
mListView.setAdapter(mPerformaceArrayAdapter);
}
public void onClickAdd(View view){
mListItems.add("" + mCounter++);
mPerformaceArrayAdapter.notifyDataSetChanged();
}
}
And here is the main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button android:id="#+id/buttonAdd" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="Add New Alarm"
android:onClick="onClickAdd" />
<ListView android:id="#+id/listViewCondition"
android:layout_height="wrap_content" android:layout_width="match_parent"></ListView>
</LinearLayout>
And the performance adapter class.
public class PerformanceArrayAdapter extends ArrayAdapter<String> {
private final Activity context;
private final ArrayList<String> mListItems;
static class ViewHolder {
public TextView textView1;
public TextView textView2;
public CheckBox checkBox;
}
public PerformanceArrayAdapter(Activity context, ArrayList<String> listItems) {
super(context, R.layout.row_layout, listItems);
this.context = context;
this.mListItems = listItems;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View rowView = convertView;
if (rowView == null) {
LayoutInflater inflater = context.getLayoutInflater();
rowView = inflater.inflate(R.layout.row_layout, null);
ViewHolder viewHolder = new ViewHolder();
viewHolder.textView1 = (TextView) rowView.findViewById(R.id.textView1);
viewHolder.textView2 = (TextView) rowView.findViewById(R.id.textView2);
viewHolder.checkBox = (CheckBox) rowView.findViewById(R.id.checkBox1);
rowView.setTag(viewHolder);
}
ViewHolder holder = (ViewHolder) rowView.getTag();
holder.textView1.setText(mListItems.get(position));
return rowView;
}
}
Here is the row_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<TextView android:id="#+id/textView1" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:layout_alignParentTop="true"
android:layout_alignParentLeft="true" android:text="TextView1"></TextView>
<TextView android:id="#+id/textView2" android:layout_below="#+id/textView1"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:text="TextView2"></TextView>
<CheckBox android:layout_width="wrap_content"
android:layout_height="wrap_content" android:id="#+id/checkBox1"
android:layout_alignParentRight="true" android:focusable="false"
android:focusableInTouchMode="false"></CheckBox>
</RelativeLayout>
I found the solution, thanks to Vogella :)
I had to use the Domain Model mentioned here to track both the text view and check box.
http://www.vogella.com/articles/AndroidListView/article.html#listadvanced_interactive

How to Show Different Layouts inside Fragments

I am working with two fragments in Android Honeycomb (Tab). In the left is a ListView and in the right is a preview of the item selected from the list. When one of the buttons is clicked, I want to show different layouts on the left. How is it possible?
Thanks in advance.
You can do this, I made the same thing with use of these links, here is my code which I am sharing with you in the hope that it will be helpful for you... You will first have to create 4 layouts. 2 of which will be for landscape mode, one for portrait mode and another for tablets. You have to create a couple more folders for layouts and their name should be like layout-xlarge and layout-xlarge-port, this way you can create fragments for both mobile devices and tablets.
MasterFragment Activity:
public class MasterFragment extends ListFragment {
Boolean isDualPane;
int position;
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
ArrayList<String> parkNames = new ArrayList<String>();
for (Park park : Resort.PARKS) {
parkNames.add(park.getName());
}
setListAdapter(new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1, parkNames));
View detailFrame = getActivity().findViewById(R.id.detail);
isDualPane = detailFrame != null && detailFrame.getVisibility() == View.VISIBLE;
if (savedInstanceState != null) {
position = savedInstanceState.getInt("position", 0);
}
if (isDualPane) {
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
showDetail(position);
}
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("position", position);
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
showDetail(position);
}
void showDetail(int position) {
this.position = position;
if (isDualPane) {
getListView().setItemChecked(position, true);
DetailFragment detailFragment = (DetailFragment) getFragmentManager()
.findFragmentById(R.id.detail);
if (detailFragment == null || detailFragment.getIndex() != position) {
detailFragment = new DetailFragment(position);
FragmentTransaction ft = getFragmentManager()
.beginTransaction();
ft.replace(R.id.detail, detailFragment);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
} else {
Intent intent = new Intent();
intent.setClass(getActivity(), DetailActivity.class);
intent.putExtra("position", position);
startActivity(intent);
}
}
}
Second Activity - DetailFragment Activity:
public class DetailActivity extends FragmentActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.detail_act);
Bundle bundle = getIntent().getExtras();
int position = bundle.getInt("position");
System.out.println("RR : position is : " + position);
Integer[] images = { R.drawable.pic1, R.drawable.pic2, R.drawable.pic3,
R.drawable.pic4, R.drawable.pic5, R.drawable.pic6,
R.drawable.pic7, R.drawable.pic8, R.drawable.pic9,
R.drawable.pic10, R.drawable.pic11, R.drawable.pic12,
R.drawable.pic13 };
final ImageView imgview = (ImageView) findViewById(R.id.imageView1);
imgview.setImageResource(images[position]);
// DetailFragment detailFragment = new DetailFragment(position);
// FragmentManager fm = getSupportFragmentManager();
// FragmentTransaction ft =fm.beginTransaction();
// ft.add(android.R.id.content, detailFragment).commit();
}
}
Now you have to create a third activity, MasterGridActivity for my images which I am using for showing in fragment in GridView.
public class MasterGridActivity extends Fragment {
Boolean isDualPane;
GridView gridView;
ListView listView;
int position;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.gridview, container, false);
gridView = (GridView) view.findViewById(R.id.gridViewImage);
gridView.setAdapter(new MyAdapter(view.getContext()));
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
View detailFrame = getActivity().findViewById(R.id.detail);
isDualPane = detailFrame != null && detailFrame.getVisibility() == View.VISIBLE;
gridView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int pos, long arg3) {
if (!isDualPane) {
Intent intent = new Intent();
intent.setClass(getActivity(), DetailActivity.class);
intent.putExtra("position", pos);
startActivity(intent);
} else {
DetailFragment detailFragment = (DetailFragment) getFragmentManager().findFragmentById(R.id.detail);
if (detailFragment == null || detailFragment.getIndex() != pos) {
detailFragment = new DetailFragment(pos);
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.detail, detailFragment);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
}
}
});
super.onActivityCreated(savedInstanceState);
}
}
Now here is my image adapter - MyAdapter - for my images which extends a BaseAdapter.
public class MyAdapter extends BaseAdapter {
private Context mContext;
public MyAdapter(Context c) {
mContext = c;
}
#Override
public int getCount() {
return mThumbIds.length;
}
#Override
public Object getItem(int arg0) {
return null;
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(100, 100));
imageView.setImageResource(mThumbIds[position]);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(0, 0, 0, 0);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
static Integer[] mThumbIds = { R.drawable.pic1, R.drawable.pic2,
R.drawable.pic3, R.drawable.pic4, R.drawable.pic5, R.drawable.pic6,
R.drawable.pic7, R.drawable.pic8, R.drawable.pic9,
R.drawable.pic10, R.drawable.pic11, R.drawable.pic12,
R.drawable.pic13,
};
}
Now I am sharing the XML files for these fragments.
Main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<fragment
android:id="#+id/master"
android:layout_width="match_parent"
android:layout_height="match_parent"
class="org.fragment.MasterGridActivity" />
</LinearLayout>
gridview.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/gridViewImage"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:numColumns="auto_fit"
android:columnWidth="90dp"
android:horizontalSpacing="10dp"
android:verticalSpacing="10dp"
android:gravity="center"
android:stretchMode="columnWidth" />
</LinearLayout>
detail_fragment.xml: This XML is for showing the detail in another fragment.
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="#+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="8dp" />
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:padding="8dp" />
</LinearLayout>
</ScrollView>
detail_act.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:src="#drawable/ic_launcher" />
</LinearLayout>
Make the same XML for landscape mode and for tablets. It's working fine for me. Hope it will helpful for you.
You need to define an event callback to the activity activity callback. That is, your left fragment must first notify the container activity that an event occurred (i.e. one of the list items were selected). The container activity will then pass this information to the right fragment, which will then update its UI accordingly.
I could explain this in more detail, but there are several tutorials on the internet that teach just that. I suggest you read through some of them, as the concept will make a lot more sense once you do.

Resources