一些有效的Android启动优化策略分享

<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <!-- 在此添加你的UI元素 -->
</androidx.constraintlayout.widget.ConstraintLayout>

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <!-- 其他UI元素 -->
    <ViewStub
        android:id="@+id/myViewStub"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout="@layout/my_delayed_layout" />
</RelativeLayout>

ViewStub myViewStub = findViewById(R.id.myViewStub);
View inflatedView = myViewStub.inflate();

<style name="AppTheme.Splash" parent="Theme.AppCompat.NoActionBar">
    <item name="android:windowBackground">@drawable/splash_background</item>
</style>

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@color/splashBackgroundColor" />
    <item>
        <bitmap
            android:src="@drawable/app_logo"
            android:gravity="center" />
    </item>
</layer-list>

<activity
    android:name=".SplashActivity"
    android:theme="@style/AppTheme.Splash">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

public class MyAsyncTask extends AsyncTask<Void, Void, Void> {
    @Override
    protected Void doInBackground(Void... voids) {
        // 执行耗时任务
        return null;
    }
    @Override
    protected void onPostExecute(Void aVoid) {
        // 更新UI或执行其他操作
    }
}

public class StartupTask extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        // 在后台线程中执行初始化工作
        new Thread(() -> {
            // 执行初始化工作
        }).start();
    }
}

<ImageView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:srcCompat="@drawable/ic_vector_image" />

// 定义依赖关系
@Module
@InstallIn(SingletonComponent.class)
public class MyModule {
    @Provides
    public MyDependency provideMyDependency() {
        return new MyDependency();
    }
}
// 在Application中初始化Hilt
@HiltAndroidApp
public class MyApp extends Application {
}

@Composable
fun MyScreen() {
    Column {
        Text(text = "Hello, Jetpack Compose!")
        Button(onClick = { /* Do something */ }) {
            Text(text = "Click me")
        }
    }
}

<application
    android:name=".MyApplication"
    android:label="@string/app_name"
    android:icon="@mipmap/ic_launcher"
    android:process=":background">
    <!-- ... -->
</application>

public class BackgroundProcessService extends Service {
    @Override
    public void onCreate() {
        super.onCreate();
        // 在后台进程中执行耗时任务
        // ...
        stopSelf(); // 任务完成后停止服务
    }
    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

<activity
    android:name=".MainActivity"
    android:launchMode="singleTask">
</activity>

public class SplashActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 执行初始化操作，如预加载数据
        // ...
        startActivity(new Intent(this, MainActivity.class));
        finish();
    }
}

repositories {
    mavenCentral()
}
dependencies {
    implementation 'io.github.idisfkj:android-startup:1.1.0'
}

class SampleSecondStartup : AndroidStartup<Boolean>() {
    override fun callCreateOnMainThread(): Boolean = false
    override fun waitOnMainThread(): Boolean = true
    override fun create(context: Context): Boolean {
        // 模仿执行耗时
        Thread.sleep(5000)
        return true
    }
    override fun dependenciesByName(): List<String> {
        return listOf("com.rousetime.sample.startup.SampleFirstStartup")
    }
}

<provider
    android:name="com.rousetime.android_startup.provider.StartupProvider"
    android:authorities="${applicationId}.android_startup"
    android:exported="false">
    <meta-data
        android:name="com.rousetime.sample.startup.SampleFourthStartup"
        android:value="android.startup" />
</provider>