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Clickable custom array list

How can I make this custom array list clickable to go to the others activities because I tried the intents but it doesn't work
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ArrayList<Names> namesArrayList = new ArrayList<Names>();
namesArrayList.add(new Names(R.drawable.call_centre, "Call Centre"));
namesArrayList.add(new Names(R.drawable.soco_academy_icon, "Academy"));
NamesAdapter NamesListAdapter = new NamesAdapter(this, namesArrayList);
ListView list = (ListView) findViewById(R.id.List_View);
list.setAdapter(NamesListAdapter);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
}
});
}
}

In onItemClick() you can determine which item was clicked by doing this:
Name selectedName = NamesListAdapter.getItem(position);
Then you can do whatever you want with that.

Cannot resolve setAdapter and setOnItemSelectedListener

I am not able to resolve setAdapter and setOnItemSelectedListener. Can anyone solve the problem.
Cannot resolve setAdapter and setOnItemSelectedListener
public class Spinner extends AppCompatActivity{
private ArrayList<CountryItem> mCountryList;
private CountryAdapter mAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.spinner);
initList();
Spinner spinnerCountries = (Spinner)findViewById(R.id.spinner_countries);
mAdapter = new CountryAdapter(this, mCountryList);
spinnerCountries.setAdapter(mAdapter);
spinnerCountries.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
CountryItem clickedItem = (CountryItem) parent.getItemAtPosition(position);
String clickedCountryName = clickedItem.getCountryName();
Toast.makeText(Spinner.this, clickedCountryName + " selected", Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
private void initList() {
mCountryList = new ArrayList<>();
mCountryList.add(new CountryItem("India", R.drawable.app_logo));
mCountryList.add(new CountryItem("China", R.drawable.app_logo));
mCountryList.add(new CountryItem("USA", R.drawable.app_logo));
mCountryList.add(new CountryItem("Germany", R.drawable.app_logo));
}

Its the same class name 'Spinner' same as the widget - Spinner that may be the cause of the issue, make sure u have imported the widget Spinner correctly, like-:
import android.widget.Spinner;

Just change your own class name from Spinner to SpinnerActivity. There's a simple conflict between your class and android.widget.Spinner

ArrayList doesn't show up on Spinner

I was trying to create a spinner which display a list of data from array list.
When I clicked on the dropdown it displays the list, but when I clicked on an item inside the dropdown list it doesn't show up the value on the spinner.
Am I missing something here?
Note: Yesterday I have tried to check using Log.d() and System.out.println, itemOnSelected() doesn't but today it works fine. Maybe I rebuilding the project or I have changed something in the code but the value on the spinner still doesn't show up after I clicked on the item inside the spinner.
Spinner spnSubjectIDInfo;
ArrayList<String> subjectList;
ArrayAdapter<String> adpSubj;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
subjectList = new ArrayList<String>();
subjectList .add("John");
subjectList .add("Maxi");
subjectList .add("Jeni");
spnSubjectIDInfo = (Spinner) v.findViewById(R.id.spnSubjectIDInfo);
adpSubj = new ArrayAdapter<String>(MyActivity.this, android.R.layout.simple_spinner_item, subjectList);
adpSubj.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spnSubjectIDInfo.setAdapter(adpSubj);
spnSubjectIDInfo.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(this, parent.getItemAtPosition(position)+ " selected", Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
XML
<Spinner
android:id="#+id/spnSubjectIDInfo"
android:layout_width="30dp"
android:layout_height="wrap_content"
android:layout_marginTop="54dp"
android:layout_centerHorizontal="true" />

Try this
AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(ActivityName.this, subjectList.get(position).toString() " selected", Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});

You are passing the wrong context to Toast instance:
If your code is in Activity then replace this by YourActivity.this or if it's in Fragment then use getActivity() or use Application context getApplicationContext(). Because currently, this is representing Spinner's onItemSelected listener context.
Do :
Toast.makeText(/*Your activity/application context*/, parent.getItemAtPosition(position)+ " selected", Toast.LENGTH_SHORT).show();
instead of:
Toast.makeText(this, parent.getItemAtPosition(position)+ " selected", Toast.LENGTH_SHORT).show();

Change the "this" to "ActvityName.this" or use "getApplicationContext()" in the Toast, you are passing anonymous class context in the toast.
Like below:
spnSubjectIDInfo.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(ActivityName.this,parent.getItemAtPosition(position)+ " selected", Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});

Hope this will help you.
public class SpinnerTest extends AppCompatActivity {
private ArrayList<String> subjectList;
private ArrayAdapter<String> adpSubj;
private Spinner spinner;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_spinner_test);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
spinner= (Spinner) findViewById(R.id.spnSubjectIDInfo);
subjectList = new ArrayList<String>();
subjectList .add("John");
subjectList .add("Maxi");
subjectList .add("Jeni");
adpSubj = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, subjectList);
adpSubj.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adpSubj);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getApplicationContext(), spinner.getItemAtPosition(position).toString() + " selected", Toast.LENGTH_SHORT).show();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
}

in Spinner setOnItemSelectedListener methord not work. if you want to get selected value show in toast use this line
String Text = mySpinner.getSelectedItem().toString();
Toast.makeText(this,Text,Toast.LENGTH_LONG).show();
it will return the selected value and will be displayed on Toast.

After few more searching I realized that I have to set the width size of the spinner to wrap_content as the length of the value doesn't support to display it on the spinner after the item being clicked at.
<Spinner
android:id="#+id/spnSubjectIDInfo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="54dp"
android:layout_centerHorizontal="true" />

how do i preserve item selected from spinner even after exiting app?

Here is my code below, which is getting item from spinner on click
public class SpinnerActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
private Spinner spinner1,spinner2,spinner3;
private static final String[] sports = {
"Hockey","Cricket","Football","Basketball","Badminton","Tennis"
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_spinner);
spinner1 = (Spinner)findViewById(R.id.drop_down);
spinner2 = (Spinner)findViewById(R.id.drop_down2);
spinner3 = (Spinner)findViewById(R.id.drop_down3);
ArrayAdapter<String> adapter;
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item,sports);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(adapter);
spinner2.setAdapter(adapter);
spinner3.setAdapter(adapter);
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String item = parent.getItemAtPosition(position).toString();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
}
How do I preserve the selected spinners' item even after exiting the application?

You can use SharedPreference to store the selected value position/id/string.
Simply add this line when you get String item
Editor edit = context.getSharedPreferences("Name_of_sf",Context.MODE_PRIVATE).edit();
edit.putString("selected_item", item);
edit.commit();
And can simply retrieve the value as
context.getSharedPreferences("Name_of_sf",Context.MODE_PRIVATE).getString("selected_item", "");

For more info #AnirudhSohil you could see the official documentation, it has a very detail examples, I hope that it helps you.
http://developer.android.com/training/basics/data-storage/shared-preferences.html

Android: Changing a textview with in a different Activity

I am trying to change textview properties of a textview that looks like this:
In a seperate Activity that looks like this:
I tried to do this with bundles but I can't get it to work.
This is how my BookActivity looks like:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.book_activity);
//this is where the size property comes in
Integer size = getIntent().getExtras().getInt("SGRkey");
TextView test2 = (TextView) findViewById(R.id.booktext);
test2.setTextSize(size);
Spinner spinner = (Spinner) findViewById(R.id.kapitelspinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
this, R.array.kapitel_array, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(new MyOnItemSelectedListener());
}
public class MyOnItemSelectedListener implements OnItemSelectedListener {
public void onItemSelected(AdapterView<?> parent,
View view, int pos, long id) {
Toast.makeText(parent.getContext(),
parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
final String[] theporn = getResources().getStringArray(R.array.allkapitel);
TextView text = (TextView) findViewById(R.id.booktext);
text.setText(theporn[pos]);
}
public void onNothingSelected(AdapterView parent) {
// Do nothing.
}
(i pick the chapter string in the spinner and that works just fine.)
And this is how my SettingsActivity looks like:
public class SettingsActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_view);
Spinner SGRspinner = (Spinner) findViewById(R.id.schriftgroeße_spinner);
ArrayAdapter<CharSequence> SGRadapter = ArrayAdapter.createFromResource(
this, R.array.schriftgroesse_list, android.R.layout.simple_spinner_item);
SGRadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
SGRspinner.setAdapter(SGRadapter);
}
public class SGROnItemSelectedListener implements OnItemSelectedListener {
public void onItemSelected(AdapterView<?> parent,
View view, int pos, long id) {
Intent answer = new Intent();
Toast.makeText(parent.getContext(),
parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
final String[] SGRstring = getResources().getStringArray(R.array.schriftgroesse_list);
int SGRint = Integer.parseInt(SGRstring[pos]);
Bundle size = new Bundle();
size.putInt("SGRkey", SGRint);
Intent nextActivity = new Intent(com.asm.reader.SettingsActivity.this, com.asm.reader.BookActivity.class);
nextActivity.putExtras(size);
com.asm.reader.SettingsActivity.this.startActivity(nextActivity);
}
public void onNothingSelected(AdapterView parent) {
// Do nothing.
}
}
I get an error when I try this. All activities are declared in the manifest. I really don't know how to go on. I'm pretty new to this, so sorry if this is something simple, but any help would be greatly appreciated!! :-)

Make your textview static. That is, declare it as a public static class variable. Then you can call it directly from the other activity like this: firstActivity.myTextView.setText("foo");