Material Style for dialogs in Android application

Today I'm talking about material style for dialogs in Android application.

STEP 1: Add libraries to the project

Firstly need to add libraries to gradle file for a project.

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.0.1'
}

STEP 2: Create dialog in application

For creating dialog in application you can use AlertDialog component. The best way way is to use android.support.v7.app.AlertDialog.

Next snippet of code show how you can create a dialog:

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle(R.string.info_title);
builder.setMessage(R.string.info_description);
builder.setPositiveButton(R.string.ok, null);
builder.setNegativeButton(R.string.cancel, null);
builder.show();

In this example we don't use click action for dialog, if you want do it you must change null to

new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        //SOME CODE
    }
}

This source code use resources from string file.

STEP 3: Add strings to the application

The best way is to use string resources instead of strings in source code. It's better for supporting multiple languages. We need to open file strings.xml from res/values folder.

<resources>
    <string name="ok">OK</string>
    <string name="cancel">Cancel</string>
    <string name="info_title">Information</string>
    <string name="info_description">Android is a mobile operating system (OS) currently developed by Google, based on the Linux kernel and designed primarily for touchscreen mobile devices such as smartphones and tablets.
From Wikipedia</string>
</resources>

After these steps you can run the application and check dialog.

STEP 4: Create style for Dialog and apply this style for the application

We need to open file styles.xml from res/values folder and add style.

<style name="AppCompatAlertDialogStyle" parent="Theme.AppCompat.Light.Dialog.Alert">
    <item name="colorAccent">#546E7A</item>
    <item name="android:textColorPrimary">#37474F</item>
    <item name="android:background">#B0BEC5</item>
</style>

• colorAccent - color of buttons
• textColorPrimary - color of text
• background - color of background of dialog

You can set style just for dialog or for all dialogs in application.

1. If you want to set style for dialog you can setup it during creating of AlertDialog.Builder. We need to change this line:

AlertDialog.Builder builder = new AlertDialog.Builder(this);

to

AlertDialog.Builder builder = new AlertDialog.Builder(this, R.style.AppCompatAlertDialogStyle);

In this case AppCompatAlertDialogStyle it's a name of style.

2. If you want add some style for all dialogs in your application you can add your style to application style, as example:

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="alertDialogTheme">@style/AppCompatAlertDialogStyle</item>
</style>

<style name="AppCompatAlertDialogStyle" parent="Theme.AppCompat.Light.Dialog.Alert">
    <item name="colorAccent">#546E7A</item>
    <item name="android:textColorPrimary">#37474F</item>
    <item name="android:background">#B0BEC5</item>
</style>