Start Google Maps using intent of ACTION_VIEW, with zoom level.

To start Google Maps using intent of ACTION_VIEW with zoom level, you can use with the Uri:
geo:Latitude,Longitude?z=<zoom level>



Modify the main.xml in last post "Start Google Maps using intent of ACTION_VIEW", include a SeekBar for user to set zoom level.

<?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="@string/hello"
 />
<TextView
 android:id="@+id/gsmcelllocation"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<TextView
 android:id="@+id/mcc"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<TextView
 android:id="@+id/mnc"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<TextView
 android:id="@+id/cid"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<TextView
 android:id="@+id/lac"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<TextView
 android:id="@+id/geo"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<TextView
 android:id="@+id/remark"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 />
<SeekBar
 android:id="@+id/zoom"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:paddingTop="5dp"
 android:paddingLeft="5dp"
 android:paddingRight="5dp"
 android:max="21" />
<TextView
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="Zoom Level" />
<Button
 android:id="@+id/viewmap"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="View Map"
 />
</LinearLayout>

Modify btnViewMap.setOnClickListener() to start activity with Uri with zoom level

package com.AndroidTelephonyManager;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.telephony.TelephonyManager;
import android.telephony.gsm.GsmCellLocation;
import android.view.View;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;

public class AndroidTelephonyManager extends Activity {

public class OpenCellID {
String mcc;  //Mobile Country Code
String mnc;  //mobile network code
String cellid; //Cell ID
String lac;  //Location Area Code

Boolean error;
String strURLSent;
String GetOpenCellID_fullresult;

String latitude;
String longitude;

public Boolean isError(){
 return error;
}

public void setMcc(String value){
 mcc = value;
}

public void setMnc(String value){
 mnc = value;
}

public void setCallID(int value){
 cellid = String.valueOf(value);
}

public void setCallLac(int value){
 lac = String.valueOf(value);
}

public String getLocation(){
 return(latitude + " : " + longitude);
}

public String getLatitude(){
 return latitude;
}

public String getLongitude(){
 return longitude;
}

public void groupURLSent(){
 strURLSent =
  "http://www.opencellid.org/cell/get?mcc=" + mcc
  +"&mnc=" + mnc
  +"&cellid=" + cellid
  +"&lac=" + lac
  +"&fmt=txt";
}

public String getstrURLSent(){
 return strURLSent;
}

public String getGetOpenCellID_fullresult(){
 return GetOpenCellID_fullresult;
}

public void GetOpenCellID() throws Exception {
 groupURLSent();
 HttpClient client = new DefaultHttpClient();
 HttpGet request = new HttpGet(strURLSent);
 HttpResponse response = client.execute(request);
 GetOpenCellID_fullresult = EntityUtils.toString(response.getEntity());
 spliteResult();
}

private void spliteResult(){
 if(GetOpenCellID_fullresult.equalsIgnoreCase("err")){
  error = true;
 }else{
  error = false;
  String[] tResult = GetOpenCellID_fullresult.split(",");
  latitude = tResult[0];
  longitude = tResult[1];
 }


}
}

int myLatitude, myLongitude;
OpenCellID openCellID;


 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.main);
     TextView textGsmCellLocation = (TextView)findViewById(R.id.gsmcelllocation);
     TextView textMCC = (TextView)findViewById(R.id.mcc);
     TextView textMNC = (TextView)findViewById(R.id.mnc);
     TextView textCID = (TextView)findViewById(R.id.cid);
     TextView textLAC = (TextView)findViewById(R.id.lac);
     TextView textGeo = (TextView)findViewById(R.id.geo);
     TextView textRemark = (TextView)findViewById(R.id.remark);
  
     final SeekBar zoomBar = (SeekBar)findViewById(R.id.zoom);
  
     Button btnViewMap = (Button)findViewById(R.id.viewmap);
     btnViewMap.setOnClickListener(new Button.OnClickListener(){

 @Override
 public void onClick(View arg0) {
  // TODO Auto-generated method stub

  int zoom = zoomBar.getProgress()+2; //convert to 2..23
           //set 1 will be Force Closed! I don't know why.

  //geo:Latitude,Longitude?z=<zoom level>
  String stringLoc
   = "geo:"
   + openCellID.getLatitude() + "," + openCellID.getLongitude()
   + "?z=" + String.valueOf(zoom);

  Toast.makeText(AndroidTelephonyManager.this, stringLoc, Toast.LENGTH_LONG).show();

  Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(stringLoc));
  startActivity(intent);
 }});
  
     //retrieve a reference to an instance of TelephonyManager
     TelephonyManager telephonyManager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
     GsmCellLocation cellLocation = (GsmCellLocation)telephonyManager.getCellLocation();
  
     String networkOperator = telephonyManager.getNetworkOperator();
     String mcc = networkOperator.substring(0, 3);
     String mnc = networkOperator.substring(3);
     textMCC.setText("mcc: " + mcc);
     textMNC.setText("mnc: " + mnc);
  
     int cid = cellLocation.getCid();
     int lac = cellLocation.getLac();
     textGsmCellLocation.setText(cellLocation.toString());
     textCID.setText("gsm cell id: " + String.valueOf(cid));
     textLAC.setText("gsm location area code: " + String.valueOf(lac));
  
     openCellID = new OpenCellID();
  
     openCellID.setMcc(mcc);
     openCellID.setMnc(mnc);
     openCellID.setCallID(cid);
     openCellID.setCallLac(lac);
     try {
 openCellID.GetOpenCellID();

 if(!openCellID.isError()){
  textGeo.setText(openCellID.getLocation());
  textRemark.setText( "\n\n"
    + "URL sent: \n" + openCellID.getstrURLSent() + "\n\n"
    + "response: \n" + openCellID.GetOpenCellID_fullresult);
 }else{
  textGeo.setText("Error");
 }
} catch (Exception e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 textGeo.setText("Exception: " + e.toString());
}
 } 
}

next:
- Get neighboring cell information, getNeighboringCellInfo()