Custom Alert in android.

We can create any type of alert in android.
Today I will show a simple example showing how to create a custom alert in android.

i.e you can provide any layout to your alert dialog.

Now we will start.

First create an xml for your alert dialog.
Here I am creating an xml that contains a textView, an imageView, two editText, a ratingbar and a button.
All these are placed inside a scrollview.
create a new xml file named “custom_alert.xml” in the res/layout folder and copy this code into it.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center|center_horizontal" >

<ScrollView
	android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:scrollbars="vertical"
    android:fadeScrollbars="true">

    <LinearLayout
    android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center|center_horizontal" >

		<TextView
			android:text="Custom Alert"
			android:id="@+id/TextView01"
			android:layout_width="fill_parent"
			android:gravity="center"
			android:layout_gravity="center|center_horizontal"
			android:layout_height="wrap_content">
		</TextView>

		<ImageView
			android:id="@+id/ImageView01"
			android:layout_width="wrap_content"
			android:layout_height="wrap_content"
			android:layout_gravity="center|center_horizontal">
		</ImageView>

		<EditText
			android:text="CoderzHeaven"
			android:id="@+id/EditText01"
			android:layout_margin="5dp"
			android:layout_width="fill_parent"
			android:layout_height="wrap_content">
		</EditText>

		<EditText
			android:text=""
			android:id="@+id/EditText02"
			android:layout_margin="5dp"
			android:layout_width="fill_parent"
			android:layout_height="wrap_content">
		</EditText>

		<RatingBar
			android:id="@+id/RatingBar01"
			android:layout_width="wrap_content"
			android:layout_margin="5dp"
			android:layout_height="wrap_content">
		</RatingBar>

		<Button
			android:text="Close App"
			android:id="@+id/Button01"
			android:layout_gravity="center|center_horizontal"
			android:layout_width="fill_parent"
			android:layout_margin="5dp"
			android:layout_height="wrap_content">
		</Button>

	</LinearLayout>
</ScrollView>
</LinearLayout>

Now in your main java file copy this code.

package com.coderzheaven.pack;

import android.app.Activity;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

public class CustomAlertDemo extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        showAlert();
    }

    public void showAlert(){
    	 Dialog dialog = new Dialog(this);
         dialog.setContentView(R.layout.custom_alert);
         dialog.setTitle("This is a custom dialog box");
         dialog.setCancelable(true);

         TextView text = (TextView) dialog.findViewById(R.id.TextView01);
         text.setText("Custom alert demo");

         ImageView img = (ImageView) dialog.findViewById(R.id.ImageView01);
         img.setImageResource(R.drawable.android_3);

         Button button = (Button) dialog.findViewById(R.id.Button01);
         button.setOnClickListener(new OnClickListener() {
         @Override
             public void onClick(View v) {
                 finish();
             }
         });
         dialog.show();
    }
}

The showAlert function will create the Dialog with the custom layout and show it.

This is the main.xml. Actually we dont need this .

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />
</LinearLayout>

Here is the AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.coderzheaven.pack"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".CustomAlertDemo"
                  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>

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