Develop Reference

Test if a user has selected an item from AutoCompleteTextView

My problem is that my code does not react accordingly whenever an user selects an item from an AutoCompleteTextView.
flag is a variable which is set to a value whenever one item from each AutoCompleteTextView has been selected. If it's set to 1, then it means it's right and it should proceed to main activity. Otherwise, a toast is displayed on click of button whose onClick calls the method callMainActivity.
There are no errors. Gradle build is successful, but clicking on that button (mentioned above) does nothing at all.
Code:
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.Toast;
import java.util.Arrays;
import java.util.List;
public class Location extends AppCompatActivity {
private static int flag=0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_location);
int city = android.R.layout.simple_dropdown_item_1line;
int area = android.R.layout.simple_dropdown_item_1line;
int store = android.R.layout.simple_dropdown_item_1line;
String []city_array = getResources().getStringArray(R.array.City);
String []area_array= getResources().getStringArray(R.array.Area);
String []store_array= getResources().getStringArray(R.array.Store);
List<String> city_list= Arrays.asList(city_array);
List<String> area_list= Arrays.asList(area_array);
List<String> store_list= Arrays.asList(store_array);
ArrayAdapter<String> adapter_city = new ArrayAdapter(this,city, city_list);
ArrayAdapter<String> adapter_area = new ArrayAdapter(this, area, area_list);
ArrayAdapter<String> adapter_store = new ArrayAdapter(this, store, store_list);
final AutoCompleteTextView autocompleteView_city =
(AutoCompleteTextView) findViewById(R.id.City);
final AutoCompleteTextView autocompleteView_area =
(AutoCompleteTextView) findViewById(R.id.Area);
final AutoCompleteTextView autocompleteView_store =
(AutoCompleteTextView) findViewById(R.id.Store);
autocompleteView_area.setAdapter(adapter_area);
autocompleteView_city.setAdapter(adapter_city);
autocompleteView_store.setAdapter(adapter_store);
autocompleteView_area.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(final View arg0) {
autocompleteView_area.showDropDown();
if(autocompleteView_area.getListSelection()!= ListView.INVALID_POSITION)
flag=1;
else
flag=0;
}
});
autocompleteView_city.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(final View arg0) {
autocompleteView_city.showDropDown();
if(autocompleteView_area.getListSelection()!= ListView.INVALID_POSITION)
flag=1;
else
flag=0;
}
});
autocompleteView_store.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(final View arg0) {
autocompleteView_store.showDropDown();
if(autocompleteView_area.getListSelection()!= ListView.INVALID_POSITION)
flag=1;
else
flag=0;
}
});
//This is the newly updated part
autocompleteView_area.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick (AdapterView<?> parent, View view, int position, long id) {
//... your stuff
if(autocompleteView_area.getListSelection()>0) {
flag = 1;
System.out.println(flag + "flag at area");
}else
flag=0;
}
});
}
public void callMainActivity(View view){
if(flag==1) {
Intent in = new Intent(getBaseContext(), MainActivity.class);
startActivity(in);
}
else
Toast.makeText(getBaseContext(),"Please select all fields properly",Toast.LENGTH_LONG);
}
}

The reason you are not seeing the Toast or changing activities, is because you are never calling callMainActivity(View view) in your code. Add this line to the end of all your OnClickListeners: callMainActivity(arg0) -- if this does not work, put some log statements in your OnClickListeners to check if they are triggering or not.
Also, if you want to trigger the call when an item from your AutoCompleteTextView result list is selected, you should use an AdapterView.OnItemClickedListener instead. This will notify you when an item is selected from the AutoCompleteTextView list, or when nothing is selected and then you can react accordingly.

How to see text in toast

I'm trying to see text from GridView using a toast when I selected or clicked on GridView's data. I can see position, but don't know what to put to see a text.
Here is a code.
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.Toast;
public class MainActivity extends Activity {
String [] data = {"a","b", "c","d","e","f", "g","h"};
GridView gdView;
ArrayAdapter<String> adapter;
String result;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
adapter = new ArrayAdapter<String>(this, R.layout.item, R.id.tvText, data);
gdView = (GridView) findViewById(R.id.gdView);
gdView.setAdapter(adapter);
gdView.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
Toast.makeText(getBaseContext(), position, Toast.LENGTH_SHORT).show();
}
});
}
}
Could someone suggest me, what I need to use or where to look for it?
Thank you

The parameter int position of the method onItemClick() on AdapterView.OnItemClickListener gives you:
The position of the view in the adapter.
See here: https://developer.android.com/reference/android/widget/AdapterView.OnItemClickListener.html#onItemClick(android.widget.AdapterView, android.view.View, int, long)
You can use this to retrieve the content of this view from your ArrayAdapter with:
adapter.getItem(position)
See here: https://developer.android.com/reference/android/widget/ArrayAdapter.html#getItem(int)
This will return the content of your ArrayAdapter at the given position, in your case as a String, which you can store in a variable if you like or pass directly into Toast.makeText().

Turn last string to
Toast.makeText(getBaseContext(), String.valueOf(position), Toast.LENGTH_SHORT).show();

add two number using spinner in android

i want to add two numbers using spinner view. here in my code two spinners .After i run the emulator it displays straight result only. it does not display spinner control and i'm not able to select the two numbers. Pls give one solution. Thanks in advance. Here code
package com.kk;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.TextView;
import android.R.id;
public class TrckActivity extends Activity {
/** Called when the activity is first created. */
String[] a={"-select-","1","2"};
String[] b={"-select-","2","4"};
int first,second,f,s,c;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ArrayAdapter<String> a1= new ArrayAdapter<String> (this,android.R.layout.simple_dropdown_item_1line,a);
final Spinner sp1=(Spinner)findViewById(R.id.spinner1);
sp1.setAdapter(a1);
sp1.setOnItemSelectedListener(new OnItemSelectedListener(){
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
first=sp1.getSelectedItemPosition();
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
ArrayAdapter<String> a2= new ArrayAdapter<String>(this,android.R.layout.simple_dropdown_item_1line,b);
final Spinner sp2=(Spinner)findViewById(R.id.spinner1);
sp2.setAdapter(a2);
sp2.setOnItemSelectedListener(new OnItemSelectedListener(){
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
second=sp2.getSelectedItemPosition();
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
if(first==1)
{
f=1;
}
else if(first==2)
{
f=2;
}
if(second==1)
{
s=2;
}
else if(second==2)
{
s=3;
}
c=f+s;
TextView tv=new TextView(this);
tv.setText(""+c);
setContentView(tv);
}
}

This might be because the spinner's "onItemSelected" method gets called initially as soon as your code enters the onCreate method. Maybe you have to maintain flag values to do this.
These links might help you get started with it,
Spinner onItemSelected called erroneously (without user action)
Spinner onItemSelected() executes when it is not suppose to

Try to exchange
android.R.layout.simple_dropdown_item_1line
to
android.R.layout.simple_spinner_item

Best way to start a new activity from a clicked listview

I have an array that successfully shows as a listview as the main activity. I've been using many tutorials in the past few days to try to find out the best way to start different activities from items clicked on this listview. I've seen everything from switch statements to calling a class by a variable, but nothing seems to work. I would possibly use an if statement but my list is over 120 entries. Any suggestions?

Why don't you put the class as a parameter of the item ?
package com.ybi;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class YbiListActivity extends ListActivity
{
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
ClickableItem[] values = new ClickableItem[1];
// here you can add your label and your activity
values[0] = new ClickableItem("Hello", YbiListActivity.class);
ArrayAdapter<ClickableItem> adapter = new ArrayAdapter<ClickableItem>(this, android.R.layout.simple_list_item_1, values);
setListAdapter(adapter);
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id)
{
ClickableItem item = (ClickableItem) getListAdapter().getItem(position);
Intent intent = new Intent(YbiListActivity.this, (Class<?>) item.itemClass);
startActivity(intent);
Toast.makeText(this, item + " selected", Toast.LENGTH_LONG).show();
}
private class ClickableItem
{
public String itemLabel;
public Object itemClass;
public ClickableItem(String ilabel, Object iclass)
{
itemLabel = ilabel;
itemClass = iclass;
}
#Override
public String toString()
{
return itemLabel;
}
}
}

You could create two new arrays in arrays.xml (list_items and list_item_activities)
Then, when an item is selected, you can use its index to find the associated activity.
<string-array name="list_items">
<item>ExampleActivity</item>
...
</string-array>
<string-array name="list_item_activities">
<item>com.example.app.ExampleActivity</item>
...
</string-array>
To explain a bit more, you would use the list_items to create the list:
String[] list = getResources().getStringArray("list_items");
for(int i = 0; i < list.length; i++){
// add the item
}
Then when the item is clicked:
public void onListItemClick(ListView l, View v, int position, long id){
String[] activities = getResources().getStringArray("list_item_activities");
// activities[position] is what you would use
}

I want to store the edited spinner value in the database

my coding is working well .But I want to store the edited spinner value in the database how it be done.here is my code
import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
public class tooo extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Spinner localSpinner = (Spinner)findViewById(R.id.color_spinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.color_array, R.layout.my_normal_spinner_item_style);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
localSpinner.setAdapter(adapter);
}
}
my simple_spinner_dropdown_item.xml

Add follwoing after setting the adapter in your code
localSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
{
public void onItemSelected(AdapterView parentView, View childView, int position, long id)
{
String text = localSpinner.getSelectedItem().toString();
//The above text variable has the selected value of spinner
}
public void onNothingSelected(AdapterView parentView)
{
}
});
Why didnt you edited question in your last post rather than creating a new post