Example ManifestPlaceHolder

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.myapplication" >

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MyActivity"
            android:label="${label}" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
         <meta-data
            android:name="com.google.android.maps.v2.API_KEY"
            android:value="${mapKey}" />
    </application>

</manifest>

build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 20
    buildToolsVersion "20.0.0"

    defaultConfig {
        applicationId "com.myapplication"
        minSdkVersion 15
        targetSdkVersion 20
        versionCode 1
        versionName "1.0"
        manifestPlaceholders = [label: "defaultName"]
        manifestPlaceholders = [mapKey: "your_debug_key"]

    }
    buildTypes {
        release {
            runProguard false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            manifestPlaceholders = [mapKey: "your_release_key"]
        }
    }
    productFlavors {

        flavor1 {
            manifestPlaceholders = [label: "flavor1"]
        }
        flavor2 {
            manifestPlaceholders = [label: "flavor2"]
        }
        flavor3 {
            manifestPlaceholders = [label: "flavor3"]
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
}

@zhEdward, in newer version, manifestPlaceholders is a map. So you should use it as folllowing

manifestPlaceholders = [label: "defaultName", mapKey: "your_debug_key"]

@baole yes it's thanks :)

Do manifestPlaceholders work when declared in a library module? So could i define the manifestPlaceholders in my library module and then would the consuming application would use those place holders?

Thanks, it was helpful!