I want to change the color of items in spinner to say 3 different colors and all the items should be added dynamically.
I am adding items in the spinner through list.
Suppose i have 2 lists and i want to merge both list items in single spinner item but
both should be of different colors.
My xml file is :
<?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" >`
<TextView
android:id="#+id/textView1"
android:layout_width="fill_parent"
android:layout_height="50dp"
android:background="#66CCFF"
android:gravity="center"
android:text="abcd"
android:textColor="#android:color/white"
android:textAppearance="?android:attr/textAppearanceLarge" />
<TextView
android:id="#+id/tvMaterial"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/material"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Spinner
android:id="#+id/spinMaterial"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
<TextView
android:id="#+id/tvWeight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/Weight"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="#+id/etWeight"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="text"
android:hint="Enter Weight"
>
</EditText>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="#+id/bAddCat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Add" />
<Button
android:id="#+id/bCancelCat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Cancel" />
</LinearLayout>
</LinearLayout>
and Java class is
package com.androidui;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
public class AddCategory extends Activity {
TextView tv1;
String cat = null;
Spinner spin;
Button add;
Button cancel;
EditText etWt;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.add_category);
tv1 = (TextView)findViewById(R.id.textView1);
add = (Button)findViewById(R.id.bAddCat);
cancel = (Button)findViewById(R.id.bCancelCat);
etWt = (EditText)findViewById(R.id.etWeight);
Bundle extras = getIntent().getExtras();
if (extras != null) {
cat = extras.getString("name");
tv1.setText(cat);
}
addItemsOnSpinner();
//Onclick listners to buttons
add.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(AddCategory.this,
"Material : "+ spin.getSelectedItem().toString() + "\nWeight : " + etWt.getText().toString(),
Toast.LENGTH_LONG).show();
}
});
cancel.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
finish();
}
});
}
public void addItemsOnSpinner() {
spin = (Spinner) findViewById(R.id.spinMaterial);
List<String> list = new ArrayList<String>();
list.add("Material 1");
list.add("Material 2");
list.add("Material 3");
list.add("Material 4");
list.add("Material 5");
list.add("Material 6");
//Second List
List<String> list2 = new ArrayList<String>();
list2.add("Mat 7");
list2.add("Mat 8");
list2.add("Mat 9");
//Combined List
List<String> listCombine = new ArrayList<String>();
listCombine.addAll(list);
listCombine.addAll(list2);
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, listCombine);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spin.setAdapter(dataAdapter);
}
}
Please suggest a method.
Thanx
You can try SpannableString for coloring your text http://developer.android.com/reference/android/text/SpannableString.html
Related
I'm trying to create a kind of game using Android Studio. Till now I have done a gridview wich shows players stored in a database. I have had some problems with gridView.setOnItemClickListener, I have had to do it by putting the code into gridView's Adparter.class so if you know how I can do that into gridView's activity please tell me.
My problem now is that when you click on a player a popup window appears in which you could change the player's name or his genre. When you click on Confirm's button the database will automatically been updated, but it doesn't works. I have try to do it step by step by using Toast in order to know if it run that part or not, the problem could be the context, but maybe I'm crazy.
I left you some pics and the code related to it.
Gridview's pic -> http://i.stack.imgur.com/GO4ms.png
PopUp windos's pic -> http://i.stack.imgur.com/aAvcm.png
gridView's adapter class
package es.fingerlabs.gamecohol;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
public class AdaptadorAmigos extends BaseAdapter {
private Context context;
private ArrayList<Amigo> misAmigos = new ArrayList<Amigo>();
public AdaptadorAmigos(ArrayList<Amigo> list, Context context) {
this.misAmigos = list;
this.context = context;
}
public View getView(final int position, View convertView, ViewGroup parent) {
View gridView = convertView;
if (gridView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
gridView = inflater.inflate(R.layout.item_amigo, null);
}
TextView TextoNombreJugador = (TextView)gridView.findViewById(R.id.tvNombreAmigo);
TextoNombreJugador.setText(misAmigos.get(position).getNombre());
//Handle buttons and add onClickListeners
ImageButton deleteBtn = (ImageButton)gridView.findViewById(R.id.btEliminarAmigo);
deleteBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//do something
AmigosSQLiteHelper amigosdbh = new AmigosSQLiteHelper(context, "DBAmigos", null, 1);
SQLiteDatabase db = amigosdbh.getWritableDatabase();
db.delete("Amigos", "id_amigo="+misAmigos.get(position).getId(), null);
misAmigos.remove(position); //or some other task
//Eliminar de la base de datos **************
notifyDataSetChanged();
}
});
// ******* THIS IS WHAT I REFER TO PUT IT ON GRIDVIEW'S ACTIVITY *******
gridView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Toast.makeText(context,"Id "+misAmigos.get(position).getId()+" Vidas "+misAmigos.get(position).getVidas(), Toast.LENGTH_SHORT).show();
Intent intent = new Intent(context, VistaAmigo.class);
intent.putExtra("Id", (misAmigos.get(position).getId()));
intent.putExtra("Nombre", (misAmigos.get(position)).getNombre());
intent.putExtra("Genero", (misAmigos.get(position)).getGenero());
context.startActivity(intent);
}
});
return gridView;
}
#Override
public int getCount() {
return misAmigos.size();
}
#Override
public Object getItem(int position) {
return null;
}
#Override
public long getItemId(int position) {
return 0;
}
}
gridView's class
package es.fingerlabs.gamecohol;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
public class SeleccionarAmigos extends AppCompatActivity {
private ArrayList<Amigo> misAmigos;
private GridView gridView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_amigos);
gridView = (GridView) findViewById(R.id.gvAmigos);
refrescarLista();
/* IF I PUT THAT HERE IT DOES NOTHING
gridView.setOnItemClickListener(new OnItemClickListener() {
#Override public void onItemClick(AdapterView<?> arg0, View v, int position, long arg3) {
Toast.makeText(getApplicationContext(),misAmigos.get(position).getNombre(), Toast.LENGTH_SHORT).show();
}
});*/
/*gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// get the data to pass to the activity based on the position clicked
Intent intent = new Intent(SeleccionarAmigos.this, VistaAmigo.class);
intent.putExtra("Id", (misAmigos.get(position).getId()));
intent.putExtra("Nombre", (misAmigos.get(position)).getNombre());
intent.putExtra("Genero", (misAmigos.get(position)).getGenero());
startActivity(intent);
}
});*/
}
public void obtenerAmigos(){
misAmigos = new ArrayList<Amigo>();
AmigosSQLiteHelper amigosdbh = new AmigosSQLiteHelper(this, "DBAmigos", null, 1);
SQLiteDatabase db = amigosdbh.getReadableDatabase();
Cursor c = db.rawQuery(" SELECT Id_amigo,Nombre,Genero FROM Amigos ", null);
//Nos aseguramos de que existe al menos un registro
if (c.moveToFirst()) {
//Recorremos el cursor hasta que no haya más registros
do {
int id = c.getInt(0);
String nombre= c.getString(1);
String genero= c.getString(2);
Amigo nuevoAmigo = new Amigo(nombre,genero,null);
nuevoAmigo.setId(id);
this.misAmigos.add(nuevoAmigo);
} while(c.moveToNext());
}
db.close();
}
public void refrescarLista(){
obtenerAmigos();
AdaptadorAmigos adapter = new AdaptadorAmigos(misAmigos, this);
gridView.setAdapter(adapter);
}
}
PopUp window class
package es.fingerlabs.gamecohol;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.PopupWindow;
import android.widget.Toast;
public class VistaAmigo extends Activity {
private int id;
private String nombre;
private String genero;
private EditText etNombre;
private EditText etGenero;
private Button btConfirmar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_vistaamigo);
etNombre = (EditText) findViewById(R.id.etNombreVistaAmigo);
etGenero = (EditText) findViewById(R.id.etGeneroVistaAmigo);
btConfirmar = (Button) findViewById(R.id.btConfirmarAmigo);
Intent i = getIntent();
i.getIntExtra("Id", id);
nombre = i.getStringExtra("Nombre");
genero = i.getStringExtra("Genero");
etNombre.setHint(nombre);
etGenero.setHint(genero);
btConfirmar.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
AmigosSQLiteHelper amigosdbh = new AmigosSQLiteHelper(VistaAmigo.this, "DBAmigos", null, 1);
SQLiteDatabase db = amigosdbh.getWritableDatabase();
ContentValues valores = new ContentValues();
valores.put("nombre", etNombre.getText().toString());
valores.put("genero", etGenero.getText().toString());
db.update("Amigos", valores, "id_amigo="+id, null);
Toast.makeText(VistaAmigo.this.getBaseContext(),"Nombre: "+etNombre.getText().toString()+" Genero: "+etGenero.getText().toString()+
"Cambios realizados",Toast.LENGTH_LONG);
}
});
}
}
gridView's layout
<?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="match_parent"
android:background="#drawable/fondogamecohol">
<GridView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/gvAmigos"
android:layout_gravity="center_horizontal"
android:numColumns="auto_fit"
android:layout_margin="10dp"
android:verticalSpacing="20dp"
android:horizontalSpacing="20dp" />
</LinearLayout>
Gridview's item layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/rounded_corners_white"
android:id="#+id/lyItemAmigo">
<ImageView
android:layout_width="124dp"
android:layout_height="95dp"
android:id="#+id/ivFotoAmigo"
android:background="#d8d8d8"
android:layout_marginTop="10dp"
android:layout_marginLeft="12dp"
android:layout_marginRight="12dp"
android:clickable="false"
android:src="#drawable/ic_tag_faces_white_36dp" />
<TextView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="Chrisitan"
android:id="#+id/tvNombreAmigo"
android:layout_gravity="center"
android:textColor="#333333"
android:textStyle="bold"
android:textSize="18dp"
android:layout_marginTop="5dp"
android:layout_marginRight="12dp"
android:clickable="false"
android:layout_marginLeft="14dp" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
android:gravity="right"
android:id="#+id/lyBotonesAmigo"
android:layout_marginTop="5dp"
android:layout_marginRight="12dp">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/btEditarAmigo"
android:clickable="false"
android:background="#drawable/ic_edit_black_18dp" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/btEliminarAmigo"
android:clickable="false"
android:background="#drawable/ic_delete_forever_black_18dp" />
</LinearLayout>
</LinearLayout>
PopUp window layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:theme="#style/PopUp1">
<LinearLayout
android:layout_width="300dp"
android:layout_height="300dp"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:background="#drawable/rounded_corners_white"
android:orientation="vertical">
<TextView
android:layout_width="fill_parent"
android:layout_height="40dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Modificar amigo"
android:id="#+id/tvModificarAmigo"
android:layout_gravity="center_horizontal"
android:background="#c9ed5a"
android:gravity="center_vertical|center_horizontal"
android:textStyle="bold"
android:textColor="#ffffff" />
<RelativeLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Nombre: "
android:id="#+id/tvNombreVistaAmigo"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:layout_marginStart="28dp"
android:layout_marginTop="51dp"
android:textStyle="bold"
android:textColor="#333333"
android:textSize="20dp" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/etNombreVistaAmigo"
android:layout_marginStart="10dp"
android:hint="Jugador 1"
android:textColorHint="#333333"
android:textColor="#333333"
android:textStyle="bold"
android:layout_alignParentTop="true"
android:layout_toEndOf="#+id/tvNombreVistaAmigo"
android:layout_toRightOf="#+id/tvNombreVistaAmigo"
android:layout_marginTop="41dp"
android:textSize="20dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Genero:"
android:id="#+id/tvGeneroVistaAmigo"
android:layout_centerVertical="true"
android:layout_alignStart="#+id/tvNombreVistaAmigo"
android:textColor="#333333"
android:textStyle="bold" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/etGeneroVistaAmigo"
android:hint="Hombre"
android:textColorHint="#333333"
android:textColor="#333333"
android:textStyle="bold"
android:layout_alignStart="#+id/etNombreVistaAmigo"
android:layout_below="#+id/etNombreVistaAmigo"
android:layout_marginTop="23dp"
android:textSize="20dp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Confirmar"
android:id="#+id/btConfirmarAmigo"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:background="#drawable/rounded_corners_green"
android:layout_marginBottom="20dp"
android:textStyle="bold"
android:paddingLeft="20dp"
android:paddingRight="20dp"
android:textSize="20dp" />
</RelativeLayout>
</LinearLayout>
</RelativeLayout>
From what I´ve seen in your code is, that you try to get the id from an intent in your PopUp window class. You have made one thing wrong:
Intent i = getIntent();
i.getIntExtra("Id", id);
it must be:
Intent i = getIntent();
id = i.getIntExtra("Id", id); //forgott id = here
and you should give a default value to id for example id=-1 . The problem is, by updating your database, you give a non value integer and so it is not possible to update your table.
What does the error mean?
package conde.app;
import android.app.Activity;
import android.os.Bundle;
import android.widget.*;
import android.app.*;
import android.view.*;
import android.util.*;
import android.database.sqlite.*;
import android.content.*;
import java.util.*;
import android.database.*;
import android.R.*;
public class MKBApplication extends Activity
{
/** Called when the activity is first created. */
Button aBtn = (Button) findViewById(R.id.addBtn);
Button dBtn = (Button) findViewById(R.id.deleteBtn);
private GroceryDataSource datasource;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
datasource = new GroceryDataSource(this);
datasource.open();
List<Grocery> values = datasource.getAllGroceryItems();
ArrayAdapter<Grocery> adapter = new ArrayAdapter<Grocery>(this,
android.R.layout.simple_list_item_2, values);
setListAdapter(adapter);
}
public void onClick(View view) {
#SuppressWarnings("unchecked")
ArrayAdapter<Grocery> adapter = (ArrayAdapter<Grocery>) getListAdapter();
Grocery grocery = null;
switch(view.getId()){
case R.id.addBtn:
String[] name = new String[] { "Pork", "Chicken", "Onion" };
String[] quantity = new String[] { "1/2 kilo", "3 kilos", "1 kilo" };
int nextInt = new Random().nextInt(3);
grocery = datasource.createGroceryItem(name[nextInt], quantity[nextInt]);
adapter.add(grocery);
break;
case R.id.deleteBtn:
if (getListAdapter().getCount() > 0) {
grocery = (Grocery) getListAdapter().getItem(0);
datasource.deleteGroceryItem(grocery);
adapter.remove(grocery);
}
break;
}
adapter.notifyDataSetChanged();
}
#Override
protected void onResume() {
datasource.open();
super.onResume();
}
#Override
protected void onPause() {
datasource.close();
super.onPause();
}
}
Here is my xml file:
<?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"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Hello World, MKBApplication"
/>
<Button
android:id="#+id/addBtn"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="ADD"
/>
<Button
android:id="#+id/deleteBtn"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="DELETE"
/>
<ListView
android:id="#android:id=list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
<ListView
android:id="#android:id=list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
should be
<ListView
android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
I am a beginner and I want the user to select three fields from a spinner, and using conditional statements to test all the three fields with an if condition and the and operator to decide which activity to be started using a button and intent.
activity level_menu
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/choose_txt"
android:textSize="30sp"
android:textStyle="bold"
android:layout_gravity="center"
android:textColor="#ff000000"
android:layout_marginBottom="30dp"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/prog"
android:textSize="32sp"
android:textStyle="bold"
android:textColor="#ff000000"
/>
<Spinner
android:id="#+id/program_spinner"
android:layout_width="match_parent"
android:layout_height="40dp"
android:entries="#array/program_list"
android:prompt="#string/programm_prompt"
android:layout_marginBottom="30sp"
android:backgroundTint="#e9ffc1"
android:background="#e9ffc1" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/lev"
android:textSize="32sp"
android:textStyle="bold"
android:textColor="#ff000000"
/>
<Spinner
android:id="#+id/level_spinner"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginBottom="30sp"
android:backgroundTint="#e9ffc1"
android:background="#e9ffc1" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/sem"
android:textSize="32sp"
android:textStyle="bold"
android:textColor="#ff000000"/>
<Spinner
android:id="#+id/sem_spinner"
android:layout_width="match_parent"
android:layout_height="40dp"
android:backgroundTint="#e9ffc1"
android:background="#e9ffc1"
android:layout_marginBottom="20dp"></Spinner>
<Button
android:id="#+id/btnEnter"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/enter"
android:textSize="25sp"
android:textStyle="bold"
android:textColor="#ff000000"
/>
level_menu.java
package inc.zibit.com.conware;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.app.Activity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.Toast;
import android.widget.AdapterView.OnItemSelectedListener;
public class Level_menu extends ActionBarActivity implements OnItemSelectedListener {
private Spinner program_spinner;
private Spinner level_spinner;
private Spinner sem_spinner;
private Button btnEnter;
ArrayAdapter<String> program_adapter;
List<String> program_list = new ArrayList<String>(Arrays.asList(getResources().getStringArray(R.array.program_list)));
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_level_menu);
addItemsOnSpinner2();
addItemsOnSpinner3();
addListenerOnButton();
// addListenerOnSpinnerItemSelection();
program_spinner = (Spinner) findViewById(R.id.program_spinner);
level_spinner = (Spinner) findViewById(R.id.level_spinner);
sem_spinner = (Spinner) findViewById(R.id.sem_spinner);
program_spinner.setOnItemSelectedListener(this);
level_spinner.setOnItemSelectedListener(this);
sem_spinner.setOnItemSelectedListener(this);
program_adapter=new ArrayAdapter<String>(getBaseContext(),android.R.layout.simple_spinner_item, program_list);
program_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
program_spinner.setAdapter(program_adapter);
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
if (!(program_spinner.getSelectedItem().toString().trim().equals("Bsc. Computer Science"))) {
if (level_spinner.getSelectedItem().toString().trim().equals("Level 100")) {
if (sem_spinner.getSelectedItem().toString().trim().equals("1st Semester")) {
startActivity(new Intent(Level_menu.this, CompScience.class));
}
}
}
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
// add items into spinner dynamically
public void addItemsOnSpinner2() {
level_spinner = (Spinner)findViewById(R.id.level_spinner);
List<String> list = new ArrayList<String>();
list.add("Level 100");
list.add("Level 200");
list.add("Level 300");
list.add("Level 400");
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, list);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
level_spinner.setAdapter(dataAdapter);
}
public void addItemsOnSpinner3() {
sem_spinner = (Spinner)findViewById(R.id.sem_spinner);
List<String> list = new ArrayList<String>();
list.add("1st Semester");
list.add("2nd Semester");
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, list);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
sem_spinner.setAdapter(dataAdapter);
}
public void addListenerOnButton() {
btnEnter = (Button) findViewById(R.id.btnEnter);
btnEnter.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if ( v.getId()==R.id.btnEnter){
Intent intent = new Intent(Level_menu.this,CompScience.class);
startActivity(intent);
}
}
});
}
}
When i run it crashes.. what am I not doing right?
Without any logs provided, my best guess would be that NullPointerException causes your crash inside onItemSelected() callback. If any of those 3 spinners have nothing selected, you will get NPE.
I suggest you first make sure that spinner.getSelectedItem() is not null, before comparing strings.
I have activities
1> mainactivity
which creates SQLite table and add stores data from edittext to mysql table
2> viewdatabse activity
which retrieves data from SQLite table and displayes in listview.
the problem is The same DATA is shown multiple time.
ex.
if i write something in edittext1 the listview will show only data of edittext1 multiple time.
here is the code of mainactivity
package com.example.androiddatabase;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener {
EditText name,password,date,other;
Button save,show;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
name=(EditText)findViewById(R.id.nametext);
password=(EditText)findViewById(R.id.password);
date=(EditText)findViewById(R.id.time);
other=(EditText)findViewById(R.id.other);
save=(Button)findViewById(R.id.button1);
show=(Button)findViewById(R.id.button2);
save.setOnClickListener(this);
show.setOnClickListener(this);
SQLiteDatabase db=null;
try{
db=openOrCreateDatabase("MyIds",MODE_PRIVATE , null);
db.execSQL("create table if not exists MyInfo(names VARCHAR(30),passwords VARCHAR(10),dates INTEGER,others VARCHAR(500))");
}
catch(Exception e){
Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show();
}
finally{
if(db.isOpen()){
db.close();
}
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(v==save)
{
String n= name.getText().toString();
String p= password.getText().toString();
String d= date.getText().toString();
String o =other.getText().toString();
SQLiteDatabase db=null;
try{
db=openOrCreateDatabase("MyIds", MODE_PRIVATE, null);
db.execSQL("insert into MyInfo(names,passwords,dates,others)values('"+n+"','"+p+"','"+d+"','"+o+"')");
}
catch(Exception e)
{
Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
}
finally
{
if(db.isOpen())
{
db.close();
}
}
}
else if (v==show)
{
Intent i = new Intent(this, viewdatabse.class);
startActivity(i);
}
}
}
here is the another activity which represens the listview which show data from mysql
package com.example.androiddatabase;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.Activity;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
public class viewdatabse extends Activity{
ListView lv;
ArrayList<HashMap<String, String>> aa;
String name,password,date,other;
HashMap<String, String> hh;
String n,p,d,o;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.listdatabse);
lv=(ListView)findViewById(R.id.listView1);
aa = new ArrayList<HashMap<String,String>>();
SQLiteDatabase db=null;
try{
db=openOrCreateDatabase("MyIds",MODE_PRIVATE , null);
Cursor c = db.rawQuery("select * from MyInfo", null);
while(c.moveToNext())
{
hh= new HashMap<String, String>();
name=c.getString(c.getColumnIndex("names"));
hh.put(n, name);
password=c.getString(c.getColumnIndex("passwords"));
hh.put(p, password);
date=c.getString(c.getColumnIndex("dates"));
hh.put(d, date);
other=c.getString(c.getColumnIndex("others"));
hh.put(o, other);
aa.add(hh);
}
}
catch(Exception e){
Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show();
}
finally{
if(db.isOpen()){
db.close();
}
}
String s[]={n,p,d,o};
int i[]={R.id.textView1,R.id.textView2,R.id.textView3,R.id.textView4};
SimpleAdapter sa = new SimpleAdapter(this, aa, R.layout.customlist, s, i);
lv.setAdapter(sa);
}
}
here is the mainactivity xml file which has 4 edittext to take user input
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<EditText
android:id="#+id/nametext"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPersonName">
<requestFocus />
</EditText>
<EditText
android:id="#+id/password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPassword" />
<EditText
android:id="#+id/time"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="time" />
<EditText
android:id="#+id/other"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10" >
</EditText>
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="save" />
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="show" />
</LinearLayout>
here is xml for view database activity which has listview to show data.
<?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" >
<ListView
android:id="#+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
here is the xml to create custom listview which is directly used in simpleadapter
<?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" >
<TextView
android:id="#+id/textView1"
android:textSize="30dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:id="#+id/textView2"
android:textSize="30dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout>
I am trying to make a TO DO LIST. I have a EditText, Button, and ListView. On button click I want to add, what I typed into the EditText into a ListView.
main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<EditText
android:id="#+id/editText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="Enter task"
android:textSize="24dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<Button
android:id="#+id/addTaskBtn"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Add Task"
android:layout_below="#+id/editText"
android:layout_alignParentLeft="true" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text=" Task"
android:id="#+id/header"
android:layout_below="#+id/addTaskBtn"
android:background="#5e5e5e"
android:textColor="#FFFFFF"
android:textSize="14dp"/>
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/list"
android:layout_below="#+id/header"
android:layout_centerHorizontal="true" />
Main_ToDoList.java
package com.example.todolist;
import android.app.Activity;
import android.app.ListActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import java.util.ArrayList;
public class Main_ToDoList extends Activity implements OnClickListener
{
private Button btnAdd;
private EditText et;
private ListView lv;
ArrayList<String> list = new ArrayList<String>();
ArrayAdapter<String> adapter;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
btnAdd = (Button)findViewById(R.id.addTaskBtn);
btnAdd.setOnClickListener(this);
et = (EditText)findViewById(R.id.editText);
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1, list);
lv.setAdapter(adapter);
}
public void onClick(View v)
{
String input = et.getText().toString();
if(input.length() > 0)
{
list.add(input);
adapter.notifyDataSetChanged();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu)
{
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main__to_do_list, menu);
return true;
}
}
The code doesn't work, new to android developing, and just trying to create a simple To Do List. Thanks for your help!
This should do it.
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
btnAdd = (Button)findViewById(R.id.addTaskBtn);
btnAdd.setOnClickListener(this);
et = (EditText)findViewById(R.id.editText);
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1, list);
// set the lv variable to your list in the xml
lv=(ListView)findViewById(R.id.list);
lv.setAdapter(adapter);
}
public void onClick(View v)
{
String input = et.getText().toString();
if(input.length() > 0)
{
// add string to the adapter, not the listview
adapter.add(input);
// no need to call adapter.notifyDataSetChanged(); as it is done by the adapter.add() method
}
}
you need to find your listview and then set the adapter:
lv=(ListView)findViewById(android.R.id.yourlistview);
lv.setAdapter(adapter);