Android Alert DialogFragment Tutorial

In this tutorial, we are going to create a custom AlertDialog example with custom-made buttons and icons.Previously we learned how to implement DialogFragment.

Let get Started.

Create a new Project in Android Studio by Click File>New Project.
Enter project name as AlertDialogExample.

Select Android SDK Version 14.

Then create Empty MainActivity.

Enter Activity name as MainActivity

MainActivity.java code

package net.techoverload.www.alertdialogexample;

import android.view.View;

import android.widget.Button;

import android.support.v4.app.FragmentActivity;

import android.support.v4.app.FragmentManager;

import android.os.Bundle;

public class MainActivity extends FragmentActivity{

Button alertBt;

FragmentManager fmanager=getSupportFragmentManager();

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

alertBt=(Button)findViewById(R.id.alertButton);

alertBt.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

AlertDialogActivity alertDialogActivity=new AlertDialogActivity();

alertDialogActivity.show(fmanager,"Alert Dialog");

}

});

}

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

xmlns:app="http://schemas.android.com/apk/res-auto"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="net.techoverload.www.alertdialogexample.MainActivity">

<Button

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:id="@+id/alertButton"

android:layout_centerInParent="true"

android:text="Alert Dialog"

/>

</RelativeLayout>

Next step is to create empty activity with no layout.Name it AlertDialogActivity.java

Paste below code.

package net.techoverload.www.alertdialogexample;

import android.os.Bundle;

import android.content.DialogInterface;

import android.support.v4.app.DialogFragment;

import android.app.Dialog;

import android.app.AlertDialog;

/**

 * A simple {@link Fragment} subclass.

 */

public class AlertDialogActivity extends DialogFragment {

public AlertDialogActivity() {

// Required empty public constructor

}

public Dialog onCreateDialog(Bundle savedInstanceState)

{return new AlertDialog.Builder(getActivity())

.setMessage("Alert Dialog Example")

.setTitle("Alert Dialog Example")

.setIcon(R.drawable.ic_launcher_background)

.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialogInterface, int i) {

}

})

.setPositiveButton("Okay", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialogInterface, int i) {

}

}).create();

}

}

AndroidManifest.xml file

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="net.techoverload.www.alertdialogexample" >

<application

android:allowBackup="true"

android:icon="@mipmap/ic_launcher"

android:label="@string/app_name"

android:roundIcon="@mipmap/ic_launcher_round"

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>

strings.xml

<resources>

<string name="app_name">AlertDialogExample</string>

<!-- TODO: Remove or change this placeholder text -->

<string name="hello_blank_fragment">Hello blank fragment</string>

</resources>