Build android project using ANT Script

1)Set path for Java , Android tools , Android platform tools
2)Install Apache set path for it.You can also set from command prompt like
set ANT_HOME=C:\ANT\Ant\apache-ant-1.9.4-bin\apache-ant-1.9.4

Once Path is set ping for ANT command and check whether you get response.

Following steps to build project using ANT[Debug APK]

1)Following command in command prompt

android update project -p <project path>

Once this command is success  check your project files like build.xml , local.properties ..etc are generated

2)Next step is building an APK.

Following command to build debug version of APK

ant debug

Above command should be entered in the command prompt once you navigate to your project path

3)After this we get  message in command prompt as build successful , if build gets failed due to any reason just try ant clean and again give ant debug

4)Once build is successful you will get an APK in the bin folder of the project

Following steps to build project using ANT[Release Signed APK]

1)Following command in command prompt

android update project -p <project path>

Once this command is success  check your project files like build.xml , local.properties ..etc are generated

2)Add the following lines to your local.properties file

key.store=D:\\Android\\keyStore\\myfile
key.alias=myfile

3)Next step is building an APK.

Following command to build release version of Signed APK

ant release

Above command should be entered in the command prompt once you navigate to your project path

4)You will be prompted to enter password for key store .

Enter the required password and press enter.

5)After this we get  message in command prompt as build successful , if build gets failed due to any reason just try ant clean and again give ant release

6)Once build is successful you will get an Signed APK in the bin folder of the project

Toggle Button

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
import android.widget.ToggleButton;

public class MyAndroidAppActivity extends Activity {

    private ToggleButton toggleButton1, toggleButton2;
    private Button btnDisplay;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        addListenerOnButton();

    }

    public void addListenerOnButton() {

        toggleButton1 = (ToggleButton) findViewById(R.id.toggleButton1);
        toggleButton2 = (ToggleButton) findViewById(R.id.toggleButton2);
        btnDisplay = (Button) findViewById(R.id.btnDisplay);

       
       
        btnDisplay.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                StringBuffer result = new StringBuffer();
                result.append("toggleButton1 : ").append(
                        toggleButton1.getText());
                result.append("\ntoggleButton2 : ").append(
                        toggleButton2.getText());

                Toast.makeText(MyAndroidAppActivity.this, result.toString(),
                        Toast.LENGTH_SHORT).show();

            }

        });
       
        toggleButton1.setOnClickListener(new OnClickListener() {
           
            @Override
            public void onClick(View arg0) {
            if(toggleButton1.isChecked())
            {
                Toast.makeText(getApplicationContext(), "Checked", Toast.LENGTH_LONG).show();
               
            }
            else
            {
                Toast.makeText(getApplicationContext(), "un Checked", Toast.LENGTH_LONG).show();
               
            }
               
            }
        });
       

    }
}

Main.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" >

    <ToggleButton
        android:id="@+id/toggleButton1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textOn="@drawable/power_on"
        android:textOff="@drawable/ic_launcher"
        android:text="ToggleButton" />

    <ToggleButton
        android:id="@+id/toggleButton2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textOn="@string/toggle_turn_on"
        android:textOff="@string/toggle_turn_off"
        android:checked="true" />

    <Button
        android:id="@+id/btnDisplay"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btn_display" />

</LinearLayout>

Hash Map with multiple values

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

/**

 * HashMap - Single Key and Multiple Values using List

 *

 *

 *

 */

public class SingleKeyMultipleValueUsingList {

    public static void main(String[] args) {

        // create map to store

        Map<String, List<String>> map = new HashMap<String, List<String>>();

        // create list one and store values

        List<String> valSetOne = new ArrayList<String>();

        valSetOne.add("Apple");

        valSetOne.add("Aeroplane");

        // create list two and store values

        List<String> valSetTwo = new ArrayList<String>();

        valSetTwo.add("Bat");

        valSetTwo.add("Banana");

        // create list three and store values

        List<String> valSetThree = new ArrayList<String>();

        valSetThree.add("Cat");

        valSetThree.add("Car");

        // put values into map

        map.put("A", valSetOne);

        map.put("B", valSetTwo);

        map.put("C", valSetThree);

        // iterate and display values

        System.out.println("Fetching Keys and corresponding [Multiple] Values n");

        for (Map.Entry<String, List<String>> entry : map.entrySet()) {

            String key = entry.getKey();

            List<String> values = entry.getValue();

            System.out.println("Key = " + key);

            System.out.println("Values = " + values + "n");

        }

    }

}

Check BlueTooth status during App Start and Monitor status using broad cast receiver

Manifest Permissions

<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
 <uses-permission android:name="android.permission.BLUETOOTH" />

Main activity

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.Toast;


public class MainActivity extends ActionBarActivity {
   
        private BluetoothAdapter mBluetoothAdapter = null;
     private static final int REQUEST_ENABLE_BT = 3;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
       
        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

       //register BroadcastReceiver here
         registerReceiver(new BTStateChangedBroadcastReceiver(),
                    new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED));
              if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment()).commit();
        }
       
                   
       
       
    }

    @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 boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

   
   
     @Override
        public void onStart() {
            super.onStart();
        

            // If BT is not on, request that it be enabled.
            // setupChat() will then be called during onActivityResult
            if (!mBluetoothAdapter.isEnabled()) {
                Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
            // Otherwise, setup the chat session
            }
        }
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
           
            switch (requestCode) {
         
            case REQUEST_ENABLE_BT:
                // When the request to enable Bluetooth returns
                if (resultCode == Activity.RESULT_OK) {
                       Toast.makeText(this, R.string.bt_enabled, Toast.LENGTH_SHORT).show();
                
                } else {
                    // User did not enable Bluetooth or an error occurred
                    Toast.makeText(this, R.string.bt_not_enabled_leaving, Toast.LENGTH_SHORT).show();
                    finish();
                }
            }
        }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container,
                    false);
            return rootView;
        }
    }

}

BroadCast Receiver :

This is needed in order to monitor status

import android.bluetooth.BluetoothAdapter;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class BTStateChangedBroadcastReceiver extends BroadcastReceiver {
   
     @Override
     public void onReceive(Context context, Intent intent) {
      int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE,
        -1);
      
      switch(state){
      case BluetoothAdapter.STATE_CONNECTED:
       Toast.makeText(context,
        "BTStateChangedBroadcastReceiver: STATE_CONNECTED",
        Toast.LENGTH_SHORT).show();
       break;
      case BluetoothAdapter.STATE_CONNECTING:
       Toast.makeText(context,
        "BTStateChangedBroadcastReceiver: STATE_CONNECTING",
        Toast.LENGTH_SHORT).show();
       break;
      case BluetoothAdapter.STATE_DISCONNECTED:
       Toast.makeText(context,
        "BTStateChangedBroadcastReceiver: STATE_DISCONNECTED",
        Toast.LENGTH_SHORT).show();
       break;
      case BluetoothAdapter.STATE_DISCONNECTING:
       Toast.makeText(context,
        "BTStateChangedBroadcastReceiver: STATE_DISCONNECTING",
        Toast.LENGTH_SHORT).show();
       break;
      case BluetoothAdapter.STATE_OFF:
       Toast.makeText(context,
        context.getResources().getString(R.string.bluetooth_alert),
        Toast.LENGTH_SHORT).show();
       break;
      case BluetoothAdapter.STATE_ON:
       Toast.makeText(context,
        "BTStateChangedBroadcastReceiver: STATE_ON",
        Toast.LENGTH_SHORT).show();
       break;
      case BluetoothAdapter.STATE_TURNING_OFF:
       Toast.makeText(context,
        "BTStateChangedBroadcastReceiver: STATE_TURNING_OFF",
        Toast.LENGTH_SHORT).show();
       break;
      case BluetoothAdapter.STATE_TURNING_ON:
       Toast.makeText(context,
        "BTStateChangedBroadcastReceiver: STATE_TURNING_ON",
        Toast.LENGTH_SHORT).show();
       break;
      }
     }
   
    }