Main Menue

package com.hatinc.priem_ali.a20linesquran;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.InputType;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import java.io.File;
import java.io.IOException;

public class Main_menu extends AppCompatActivity implements View.OnClickListener {

    private Button button1;
    private Button button2;
    private Button button3;
    private Button button4;
    private Button button5;

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

        button1 = (Button)findViewById( R.id.button1 );
        button2 = (Button)findViewById( R.id.button2 );
        button3 = (Button)findViewById( R.id.button3 );
        button4 = (Button)findViewById( R.id.button4 );
        button5 = (Button)findViewById( R.id.button5 );

        button1.setOnClickListener( this );
        button2.setOnClickListener( this );
        button3.setOnClickListener( this );
        button4.setOnClickListener( this );
        button5.setOnClickListener( this );

    }

    @Override
    public void onClick(View v) {

        if ( v == button1 ) {
            // Handle clicks for button1
            Intent i = new Intent(this,MainActivity.class);
            startActivity(i);
        } else if ( v == button2 ) {

        save_in_extrenal_file db = new save_in_extrenal_file();
            db.datasaver("");
        } else if ( v == button3 ) {
            // Handle clicks for button3
        } else if ( v == button4 ) {
            // Handle clicks for button4
        } else if ( v == button5 ) {
            // Handle clicks for Go TO Page

            try {
                // Handle clicks for button2
                AlertDialog.Builder alert = new AlertDialog.Builder(this);
                final EditText edittext = new EditText(this);
                alert.setMessage("Go To Page No#\n  اذهب إلى رقم الصفحة");
                alert.setTitle("HOLY QURAN القرآن الكريم");

                edittext.setInputType(InputType.TYPE_CLASS_NUMBER);

                alert.setView(edittext);

                alert.setPositiveButton("Search بحث", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        //What ever you want to do with the value
                        Editable YouEditTextValue = edittext.getText();

                        Toast.makeText(getApplicationContext(),"You Entered "+YouEditTextValue,Toast.LENGTH_LONG).show();
                    }
                });

                alert.setNegativeButton("Cancel إلغاء", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        // what ever you want to do with No option.
                    }
                });

                alert.show();
            } catch (Exception e) {
                Toast.makeText(getApplicationContext(),e.toString(),Toast.LENGTH_LONG).show();
                e.printStackTrace();
            }
        }
    }
}