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Creating an Alert Dialog Box in Android
Ehtesham Mehmood
Mar 31, 2020
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In this article you will learn how to make an Alert Dialog Box in Android.
Introduction
Hey guys how are you? Today I will show you how to make an alert dialog box in Android. In this tutorial, I am using the class reference here
Android. Builder
. Let's start.
Figure 1
Figure 2
Figure 3
AndroidManifest.xml File
This is your AndroidManifest File; replace it with your own:
<?
xml
version
=
"1.0"
encoding
=
"utf-8"
?>
<
manifest
xmlns:android
=
"http://schemas.android.com/apk/res/android"
package
=
"com.example.alertdialog"
android:versionCode
=
"1"
android:versionName
=
"1.0"
>
<
uses-sdk
android:minSdkVersion
=
"8"
android:targetSdkVersion
=
"19"
/>
<
application
android:allowBackup
=
"true"
android:icon
=
"@drawable/ic_launcher"
android:label
=
"@string/app_name"
android:theme
=
"@style/AppTheme"
>
<
activity
android:name
=
"com.example.alertdialog.MainActivity"
android:label
=
"@string/app_name"
>
<
intent-filter
>
<
action
android:name
=
"android.intent.action.MAIN"
/>
<
category
android:name
=
"android.intent.category.LAUNCHER"
/>
</
intent-filter
>
</
activity
>
</
application
>
</
manifest
>
Main.xml(Layout File)
This is your layout file:
<?
xml
version
=
"1.0"
encoding
=
"utf-8"
?>
<
RelativeLayout
xmlns:android
=
"http://schemas.android.com/apk/res/android"
android:layout_width
=
"match_parent"
android:layout_height
=
"match_parent"
>
<
EditText
android:id
=
"@+id/EditText01"
android:text
=
"I Love Android"
android:layout_height
=
"50dip"
android:layout_width
=
"180dip"
>
</
EditText
>
<
Button
android:id
=
"@+id/Button01"
android:layout_width
=
"wrap_content"
android:layout_height
=
"wrap_content"
android:layout_below
=
"@+id/EditText01"
android:text
=
"Clear Screen"
>
</
Button
>
</
RelativeLayout
>
MainActivity.java File
This is your main Java file in which you will code it:
package com.example.alertdialog;
package
com.example.alertdialog;
import
android.support.v7.app.ActionBarActivity;
import
android.support.v7.app.ActionBar;
import
android.support.v4.app.Fragment;
import
android.app.AlertDialog;
import
android.app.Dialog;
import
android.content.DialogInterface;
import
android.os.Bundle;
import
android.view.LayoutInflater;
import
android.view.Menu;
import
android.view.MenuItem;
import
android.view.View;
import
android.view.ViewGroup;
import
android.widget.Button;
import
android.widget.EditText;
import
android.widget.Toast;
import
android.os.Build;
public
class
MainActivity
extends
ActionBarActivity
{
Button Clear;
EditText edit_data;
//Called when the activity is first created
@Override
public
void
onCreate(Bundle savedInstanceState)
{
super
.onCreate(savedInstanceState);
setContentView(R.layout.main);
Clear=(Button)findViewById(R.id.Button01);
edit_data=(EditText)findViewById(R.id.EditText01);
Clear.setOnClickListener(
new
View.OnClickListener()
{
@Override
public
void
onClick(View v)
{
AlertDialog.Builder builder=
new
AlertDialog.Builder(v.getContext());
//Set a title
builder.setTitle(
"Confirm"
);
//Set a message
builder.setMessage(
"Do you want to Clear?"
);
////Here Set a listener to be called when the positive button of the dialog is pressed.
builder.setPositiveButton(
"OK"
,
new
DialogInterface.OnClickListener()
{
@Override
public
void
onClick(DialogInterface dialog,
int
which)
{
//clearing the contents of edittext on click of OK button
edit_data.setText(
""
);
//Displaying a toast message
Toast.makeText(getApplicationContext(),
"Your text has been cleared"
, Toast.LENGTH_LONG).show();
}
});
//Here Set a listener to be called when the negative button of the dialog is pressed.
builder.setNegativeButton(
"Cancel"
,
new
DialogInterface.OnClickListener()
{
@Override
public
void
onClick(DialogInterface dialog,
int
which)
{
// TODO Auto-generated method stub
dialog.cancel();
}
});
//Create the dialog
AlertDialog alertdialog=builder.create();
//show the alertdialog
alertdialog.show();
}
});
}
}
Summary
For any queries please comment. I hope you guys will like this article and share this article with the world for sharing knowledge.
Android Programming
Dialog Box in Android
make an alert dialog box
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