Custom Dialog With Call Back in Android

What is Dialog in Android :

A dialog is a small window that prompts the user to make a decision or enter additional information. A dialog does not fill the screen and is normally used for modal events that require users to take an action before they can proceed.

Create Custom Layout : 

 If you want a custom layout in a dialog, create a layout and add it to an AlertDialog by calling setView() on your AlertDialog.Builder object or add it to 
Dialod by calling setContentView() on your Dialog object.
.
Dialog Methods :

• cancel() : Cancel the dialog.
• dismiss() : Dismiss the dialog. Removing it from screen .
• setContentView(int resId) : Set the screen content from layout resource.
• setCanceledOnTouchOutside(boolean cancel) : Sets whether this dialog is canceled when touched outside the window's bounds. 
• setCancelable(boolean value) : Sets whether this dialog is cancelable with the BACK key. 
• requestWindowFeature(int featuredId) : Enable extended window features. 
• show() : Start the dialog and display it on screen. 

Let's go to create an example in android studio.

Create Project :

          a) Open Android Studio

          b) Go to File >New> New Project  > Project Name  > Next > Next > Next > Finish 

Layout Design :

         open activity_main.xml file and replace the given bellow code

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#31877B"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="10dp"
        android:text="Apna Java"
        android:textColor="#41f4ca"
        android:textSize="30dp" />

    <TextView
        android:id="@+id/custom_tvButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="10dp"
        android:text="Single Button"
        android:textColor="#000"
        android:textSize="20dp" />

    <TextView
        android:id="@+id/custom_tvButton2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="10dp"
        android:text="Double Button"
        android:textColor="#FFF"
        android:textSize="20dp" />

</LinearLayout>

create custom_dialog_with_callback_button.xml file within layout folder and replace 

the given bellow code.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#31877B">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:orientation="vertical"
        android:background="#FFF"
        android:layout_margin="2dp">

        <TextView
            android:id="@+id/customDialog_tvHeader"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#E80E39"
            android:text="Do you want to login"
            android:textSize="15dp"
            android:layout_margin="15dp"/>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="15dp"
            android:orientation="horizontal">

            <TextView
                android:id="@+id/customDialog_tvButton1"
                android:layout_width="match_parent"
                android:layout_height="40dp"
                android:layout_weight="1"
                android:gravity="center"
                android:layout_marginLeft="10dp"
                android:layout_marginRight="10dp"
                android:textColor="#FFF"
                android:textSize="15dp"
                android:background="#31877B"
                android:text="Login"/>

            <TextView
                android:id="@+id/customDialog_tvButton2"
                android:layout_width="match_parent"
                android:layout_height="40dp"
                android:layout_weight="1"
                android:gravity="center"
                android:layout_marginLeft="10dp"
                android:layout_marginRight="10dp"
                android:textColor="#FFF"
                android:textSize="15dp"
                android:background="#31877B"
                android:text="Register"/>

        </LinearLayout>

    </LinearLayout>

</RelativeLayout>

 open manifest.xml file and replace the given bellow code .

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="your package name">
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
      
    </application>

</manifest>

Code:  
 

Create CustomDialogWithCallBackButton.java file and replace the given bellow code.

import android.app.Dialog;
import android.content.Context;
import android.view.View;
import android.view.Window;
import android.widget.TextView;

/**
 * Created by anupam on 15/9/17.
 */

public class CustomDialogWithCallBackButton {

    private String strTag, strHeader, strButton1, strButton2;
    private Context mContext;
    private CallBackButtonClick clickCallBackButton;
    private TextView tvHeader, tvButton1, tvButton2;
    private View.OnClickListener mOnClick;
    Dialog dialog;

    public CustomDialogWithCallBackButton(Context mContext, String strTag,
     String strHeader, String strButton1, String strButton2,
     CallBackButtonClick clickCallBackButton) {
        this.strTag = strTag;
        this.strHeader = strHeader;
        this.strButton1 = strButton1;
        this.strButton2 = strButton2;
        this.mContext = mContext;
        this.clickCallBackButton = clickCallBackButton;

        dialog = new Dialog(mContext);
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        dialog.setContentView(R.layout.custom_dialog_with_callback_button);

        initUi();
        initUiListener();
        attachListener();
        dialog.show();
    }

    public void initUi() {
        tvHeader = (TextView) dialog.findViewById(R.id.customDialog_tvHeader);
        tvButton1 = (TextView) dialog.findViewById(R.id.customDialog_tvButton1);
        tvButton2 = (TextView) dialog.findViewById(R.id.customDialog_tvButton2);
        tvHeader.setText(strHeader);
        /* TAG is used for hide or display button*/
        if (strTag.equals("0")) {
            tvButton1.setText(strButton1);
            tvButton2.setVisibility(View.GONE);
        } else {
            tvButton1.setText(strButton1);
            tvButton2.setText(strButton2);
            tvButton2.setVisibility(View.VISIBLE);
        }
    }

    public void initUiListener() {
        mOnClick = new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                switch (v.getId()) {
                    case R.id.customDialog_tvButton1:
                        clickCallBackButton.onButtonClick(strButton1);
                        dialog.dismiss();
                        break;
                    case R.id.customDialog_tvButton2:
                        clickCallBackButton.onButtonClick(strButton2);
                        dialog.dismiss();
                        break;
                }
            }
        };
    }

    public void attachListener() {
        tvButton1.setOnClickListener(mOnClick);
        tvButton2.setOnClickListener(mOnClick);
    }

    public interface CallBackButtonClick {
        public void onButtonClick(String strButtonText);
    }
}

 Open MainActivity.java file and replace the given bellow code.

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements CustomDialogWithCallBackButton.CallBackButtonClick {

    Context context;
    TextView tvCallDialog,tvCallDialog2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        context=this;
        tvCallDialog=(TextView)findViewById(R.id.custom_tvButton);
        tvCallDialog.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new CustomDialogWithCallBackButton(context, "0", "This is Apna Java tutorial blog for all Java and Android developers.", "Okay", "", MainActivity.this);
            }
        });

        tvCallDialog2=(TextView)findViewById(R.id.custom_tvButton2);
        tvCallDialog2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                 new CustomDialogWithCallBackButton(context, "1", "Like this page on Facebook(Apna Android) to get more info in details.", "Like", "Dislike", MainActivity.this);

            }
        });

    }

    @Override
    public void onButtonClick(String strButtonText) {
        Toast.makeText(context,strButtonText,Toast.LENGTH_LONG).show();
    }
}

Note :
          If you want to call the CustomDialogWithCallBackButton class from fragment use the bellow given code.

// for fragment calling
new CustomDialogWithCallBackButton(context, "1", "Like this page on Facebook(Apna Android) to get more info in details.", "Like", "Dislike", 

(CustomDialogWithCallBackButton.CallBackButtonClick) "put your fragment class name".this

);



Output :

             

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