Android program to make a Spinner view

To make a spinner we take the spinner in xml file. Directly drag and drop the spinner. Spinner  the way to select any item from the list that we want to choose. Spinner view is like a drop down list on any thing.
In java file we take the array to store the values that we want to see in the drop down list. After storing the values in the array we apply the toast on that values. when a user select any item then the result will show for some period of time. We apply the toast so result will show for certain period of time.
In manifest.xml no need to change any data. All services in the manifest file is already in correct format so no need to change in manifest file.

activity_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"
    >

<Spinner
android:id="@+id/Spinner01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:drawSelectorOnTop = "true"></Spinner>
</LinearLayout>

SpinnerView.java

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.Toast;

import android.widget.AdapterView.OnItemSelectedListener;

public class SpinnerView extends Activity {

String[] androidBooks = 

{

"Cup-Cake",

"Donut",

"Eclair",

"Froyo",

"Gingerbeard",

"Honeycomb",

"Ice-cream sandwitch",

"Jelly bean",

"Kitkat",

                "Lollipop"

};

Spinner sp;

/** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        

        sp = (Spinner)findViewById(R.id.Spinner01); 

        

        ArrayAdapter<String> adapter = new ArrayAdapter<String> (this,android.R.layout.simple_spinner_item,androidBooks);

        

        

        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

        sp.setAdapter(adapter);

       

        sp.setOnItemSelectedListener(new OnItemSelectedListener() {

public void onItemSelected(AdapterView<?> arg0, View arg1,

int arg2, long arg3) {

Toast.makeText(getBaseContext(),arg0.getSelectedItem().toString(),Toast.LENGTH_SHORT).show();

}

public void onNothingSelected(AdapterView<?> arg0) {

}

       

        });

    }

}

manifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

      package="com.sai.samples.views"

      android:versionCode="1"

      android:versionName="1.0">

    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <activity android:name=".SpinnerView"

                  android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

    <uses-sdk android:minSdkVersion="7" />

</manifest> 

Android Program on Alert Dialog box

We use Java file, Xml file and Manifest file to make a app for Alert Dialog box. In xml file we take one text view and three buttons. On the click of any button a dialog box will be open for short period time. We write the message in the toast so it will take some time to show on the screen.In java file every button is performing different actions.

           In manifest file no change will be done. because every permission is ok in manifest file.

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/hello_world" />

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_below="@+id/textView1"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="64dp"

        android:text="Button" />

    <Button

        android:id="@+id/button2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/button1"

        android:layout_below="@+id/button1"

        android:layout_marginTop="28dp"

        android:text="Button" />

    <Button

        android:id="@+id/button3"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/button2"

        android:layout_below="@+id/button2"

        android:layout_marginTop="30dp"

        android:text="Button" />

</RelativeLayout> 

MainActivity.java

package com.example.alertdialogbox;

import android.os.Bundle;

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.view.Menu;

import android.view.View;

import android.widget.Button;

import android.widget.Toast;

public class MainActivity extends Activity {

Button B1,B2,B3;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

B1=(Button) findViewById(R.id.button1);

B2=(Button) findViewById(R.id.button2);

B3=(Button) findViewById(R.id.button3);

B1.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

final AlertDialog  alertDialog = new AlertDialog.Builder(MainActivity.this).create();

alertDialog.setTitle("Alert Dialog");

alertDialog.setMessage("Welcome to AndroidHive.info");

alertDialog.setIcon(R.drawable.icon_smile);

alertDialog.setButton("OK", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

Toast.makeText(getApplicationContext(), "You clicked on OK", Toast.LENGTH_SHORT).show();

}

});

alertDialog.show();

}

});

B2.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

//alertDialog.setButton2(text, listener)

AlertDialog.Builder  alertDialog = new AlertDialog.Builder(MainActivity.this);

alertDialog.setTitle("Alert Dialog");

alertDialog.setMessage("Welcome to google.co.in");

alertDialog.setIcon(R.drawable.icon_smile);

alertDialog.setNegativeButton("NO", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

Toast.makeText(getApplicationContext(), "You clicked on NO", Toast.LENGTH_SHORT).show();

}

});

alertDialog.show();

}

});

B3.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

AlertDialog.Builder  alertDialog = new AlertDialog.Builder(MainActivity.this);

alertDialog.setTitle("Alert Dialog");

alertDialog.setMessage("Welcome to AndroidHive.info");

alertDialog.setIcon(R.drawable.icon_smile);

alertDialog.setPositiveButton("YES", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

Toast.makeText(getApplicationContext(), "You clicked on YES", Toast.LENGTH_SHORT).show();

}

});

alertDialog.setNegativeButton("NO", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

Toast.makeText(getApplicationContext(), "You clicked on NO", Toast.LENGTH_SHORT).show();

}

});

alertDialog.show();

}

});

}

}

manifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.alertdialogbox"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="18" />

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name="com.example.alertdialogbox.MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>