Telephony Manager (Blacklist/Whitelist/Picks up call automatically/Emergency Call) for Android

This is the main java code for implementing a blacklist/whitelist telephone manager for android. Additional features include picking up the call automatically as well as sending emergency calls.. If any doubts please do comment. I'll upload the XML scripts on request.
JAVA CODE
package com.example.phone;

import java.lang.reflect.Method;



import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
int i=0;
RelativeLayout back;
ArrayAdapter<String> listAdapter;
ListView listView;
ArrayAdapter<String> listAdapter1;
ListView listView1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TelephonyManager TelephonyMgr = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
TelephonyMgr.listen(new TeleListener(), PhoneStateListener.LISTEN_CALL_STATE);
listView=(ListView) findViewById(R.id.black);
listView1=(ListView) findViewById(R.id.ListView01);
listAdapter= new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,0);
listAdapter1= new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,0);
listView.setAdapter(listAdapter);
listView1.setAdapter(listAdapter1);
back=(RelativeLayout) findViewById(R.id.back1);

}


@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;
}
public void wl(View v)
{
EditText ed=(EditText) findViewById(R.id.editText1);
String s= ed.getText().toString();
listAdapter.add(s);


}
public void bl(View v)
{
EditText ed=(EditText) findViewById(R.id.editText1);
String s= ed.getText().toString();
listAdapter1.add(s);


}
public void accept(View v)
{
TextView tv=(TextView) findViewById(R.id.tv);
tv.setText("ACCEPTING CALLS\nOnly Numbers on the\nBlackList will not be\nautomatically accepted");
i=2;
back.setBackgroundResource(R.drawable.accept);
}
public void reject(View v)
{
i=1;
TextView tv=(TextView) findViewById(R.id.tv);
tv.setText("REJECTING CALLS\nOnly Numbers on the\nWhiteList will be Accepted");
back.setBackgroundResource(R.drawable.reject);
}
public void emer(View v)
{
Uri number = Uri.parse("tel:5551234");
Intent callIntent = new Intent(Intent.ACTION_CALL, number);

startActivity(callIntent);
}
// public class PhoneCallReceiver extends BroadcastReceiver {
// private ITelephony telephonyService;
//}

class TeleListener extends PhoneStateListener {
 public void onCallStateChanged(int state, String incomingNumber) {
  super.onCallStateChanged(state, incomingNumber);
  switch (state) {
  case TelephonyManager.CALL_STATE_IDLE:
   // CALL_STATE_IDLE;
   Toast.makeText(getApplicationContext(), "CALL_STATE_IDLE",
     Toast.LENGTH_LONG).show();
   break;
  case TelephonyManager.CALL_STATE_OFFHOOK:
   // CALL_STATE_OFFHOOK;
   Toast.makeText(getApplicationContext(), "CALL_STATE_OFFHOOK",
     Toast.LENGTH_LONG).show();
   break;
  case TelephonyManager.CALL_STATE_RINGING:
   // CALL_STATE_RINGING
  if(i==1)
  {


  if(listAdapter.getCount()>=0)
  {
  Toast.makeText(getApplicationContext(), ""+listAdapter.getPosition(incomingNumber), Toast.LENGTH_SHORT).show();
  if(listAdapter.getPosition(incomingNumber)!=-1)
  Toast.makeText(getApplicationContext(), "Call is on WhiteList", Toast.LENGTH_SHORT).show();

  else
  endcal();
  }
else

  endcal();

  }
  else if(i==2)
  {

  if(listAdapter1.getCount()>=0)
  {
  Toast.makeText(getApplicationContext(), ""+listAdapter1.getPosition(incomingNumber), Toast.LENGTH_SHORT).show();
  if(listAdapter1.getPosition(incomingNumber)!=-1)
  Toast.makeText(getApplicationContext(), "Call is on BlackList", Toast.LENGTH_SHORT).show();
  else
  acceptcall();
  }
else


  acceptcall();
  }
   Toast.makeText(getApplicationContext(), incomingNumber,
     Toast.LENGTH_LONG).show();
   Toast.makeText(getApplicationContext(), "CALL_STATE_RINGING",
     Toast.LENGTH_LONG).show();
   break;
  default:
   break;
  }
 }

private void endcal() {
TelephonyManager tm = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
try{

Class c = Class.forName(tm.getClass().getName());
Method m = c.getDeclaredMethod("getITelephony");
m.setAccessible(true);
Object telephonyService = m.invoke(tm); // Get the internal ITelephony object
c = Class.forName(telephonyService.getClass().getName()); // Get its class
m = c.getDeclaredMethod("endCall"); // Get the "endCall()" method
m.setAccessible(true); // Make it accessible
m.invoke(telephonyService); // invoke endCall()
Toast.makeText(getApplicationContext(), "CALL IS REJECTED", Toast.LENGTH_SHORT).show();
}
catch (Exception e){}// TODO Auto-generated method stub

}
private void acceptcall() {
TelephonyManager tm = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);

try{
Intent buttonUp = new Intent(Intent.ACTION_MEDIA_BUTTON);
   buttonUp.putExtra(Intent.EXTRA_KEY_EVENT,
     new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_HEADSETHOOK));
   getApplicationContext().sendOrderedBroadcast(buttonUp, "android.permission.CALL_PRIVILEGED");
Toast.makeText(getApplicationContext(), "CALL IS accepted", Toast.LENGTH_SHORT).show();
}
catch (Exception e){}// TODO Auto-generated method stub

}
}
}