如何在android应用程序中启动unity游戏？

import com.unity3d.player.UnityPlayerActivity;

public class GameActivity extends UnityPlayerActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // 初始化UnityPlayer
        mUnityPlayer = new UnityPlayer(this);

        // 启动Unity游戏
        mUnityPlayer.UnitySendMessage("GameManager", "LoadLevel", "Level1");
        mUnityPlayer.UnityPlayerActivityLoaded(this);

        // 将Unity视图添加到布局中
        setContentView(mUnityPlayer);
    }
}

<activity android:name=".GameActivity"
    android:label="Unity Game"
    android:screenOrientation="landscape">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>