🚀【Jetpack】Android App Startup 加快 APP 啟動時間 範例💨

Android App Startup 是一個 Android 應用程式的啟動過程。當使用者啟動應用程式時，系統會執行一系列的初始化步驟，並載入相關的資源和數據，最後顯示應用程式的主畫面。這過程保證了應用程式的正確運作，並確保了使用者體驗的流暢性。

文章目錄

1. 定義全域方法
2. 創建 WorkManage
3. 初始化依賴庫
4. 初始化Application
5. AndroidManifest.xml
6. Developer Documents App Startup

1.定義全域方法

Sync.kt

object Sync {

    fun initialize(context: Context) {
        AppInitializer.getInstance(context)
            .initializeComponent(SyncInitializer::class.java)
    }

}

2.創建 WorkManage

TimeWorkManage.kt

class TimeWorkManage(context: Context, workerParameters: WorkerParameters) : Worker(context, workerParameters) {

    override fun doWork(): Result {
        Log.d("LocalDateTime", LocalDateTime.now().toString())
        return Result.success()
    }

}

3.初始化依賴庫

SyncInitializer.kt

class SyncInitializer : Initializer<Sync> {

    override fun create(context: Context): Sync {
        WorkManager.getInstance(context).apply {
            enqueueUniqueWork(
                "timeWork",
                ExistingWorkPolicy.KEEP,
                OneTimeWorkRequest.from(TimeWorkManage::class.java),
            )
        }

        return Sync
    }

    override fun dependencies(): MutableList<Class<out Initializer<*>>> = mutableListOf(WorkManagerInitializer::class.java)

}

4.初始化Application

MyApplication.kt

class MyApplication : Application() {

    override fun onCreate() {
        super.onCreate()
        Sync.initialize(this)
    }

}

5.AndroidManifest.xml

application name 指定為 MyApplication

provider 聲明 meta-data

<application
        android:name=".MyApplication"
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.JetpackDemo"
        tools:targetApi="31">

        <activity
            android:name=".MainActivity"
            android:configChanges="orientation|keyboard|layoutDirection|screenSize"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <provider
            android:name="androidx.startup.InitializationProvider"
            android:authorities="${applicationId}.androidx-startup"
            android:exported="false"
            tools:node="merge">

            <meta-data
                android:name="com.example.jetpackdemo.SyncInitializer"
                android:value="androidx.startup"
                tools:node="remove" />

        </provider>

    </application>

6.Developer Documents App Startup

Open in Documents App Startup