MainActivity.java

package com.example.jim_m.myapplication;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import cz.msebera.android.httpclient.Header;
import org.json.*;
import com.loopj.android.http.*;
import android.widget.Toast;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import java.io.UnsupportedEncodingException;


public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    }
    public void Search(View view) {
        Intent intent = new Intent(this, SearchActivity.class);
        startActivity(intent);

    }

    public void Update(View view) {
        Intent intent = new Intent(this, UpdateActivity.class);
        startActivity(intent);

    }


    public void Delete(View view) {
        Intent intent = new Intent(this, DeleteActivity.class);
        startActivity(intent);

    }

    public void Post(View view) {
        Intent intent = new Intent(this, PostActivity.class);
        startActivity(intent);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.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();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}