lock window using android

Server Side Code Using Java

LockWindow.java

package com.deep;

public class LockWindow {

     public void lockWindow(){
           try{
     Runtime rt = Runtime.getRuntime();
     Process pr = rt.exec("C:\\Windows\\System32\\rundll32.exe user32.dll,LockWorkStation");
           }catch (Exception e) {
                System.out.println(e);
           }
     }
}

index.jsp

<%@page import="com.deep.LockWindow"%>
<%
String lock=request.getParameter("lock");
    if(lock!=null){
    new LockWindow().lockWindow();
    out.print("Successfully Lock");
    }else{
    out.print("Lock Failed !");
    }
%>

Android Code

activity.xml

  <xml version="1.0" encoding="utf-8"?>
  <RelativeLayout android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:android="http://schemas.android.com/apk/res/android">


    <LinearLayout android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_centerInParent="true">

        <ImageView
            android:layout_width="200dp"
            android:layout_height="200dp"
            android:id="@+id/imagedata"
            android:background="@drawable/unlock"
            android:layout_gravity="center"/>

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:text="Deep Singh"
            android:typeface="serif"
            android:gravity="center"
            android:textStyle="bold"
            android:textColor="#000000"
            android:id="@+id/textdata"/>
    </LinearLayout>


</RelativeLayout>

MainActivity.java

package com.example.lockwindow;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import java.util.HashMap;
import java.util.Map;

public class MainActivity extends AppCompatActivity {


    ImageView im;
    TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        im=(ImageView)findViewById(R.id.imagedata);

        tv=(TextView)findViewById(R.id.textdata);

        im.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                sendToServer();

            }

        });

    }



    private void sendToServer(){

        StringRequest sr=new StringRequest(Request.Method.POST,

 "http://192.168.42.198:9876/LockWindow/", 


new Response.Listener() {


 @Override
 public void onResponse(String s) {

    if(!s.isEmpty()){

    im.setImageResource(R.drawable.lock);

    tv.setText(s);

}
            }
        },

 new Response.ErrorListener() {


 @Override
 public void onErrorResponse(VolleyError volleyError) {

                Toast.makeText(MainActivity.this,

          "Error : " + volleyError, Toast.LENGTH_SHORT).show();

            }

        }){
       

 @Override
 protected Map getParams() throws AuthFailureError {

            HashMap<String,String> h=new HashMap();

            h.put("lock","lock");

             return h;

            }

        };

        Volley.newRequestQueue(this).add(sr);

    }

}
  

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