subActivity上的UnityPlayer blackScreen

Question

在android Studio项目中，当我切换到另一个也包含UnityPlayer的活动时，UnityPlayer会在subActivity上显示一个BlackScreen。

我在Arcore项目中，我使用Android studio有一个良好的界面和易于实现，我使用最新的Unity版本和Android studio，以及每一个android librairy(Androidx)。我需要在另一个活动上打开Unity视图，但似乎不起作用。在谷歌上做的每一项研究都会让我回答谁不能解决我的问题，或者在我的manifest.xml上添加一个android:进程，但不可能让它工作。

与这两个活动的mUnityPlayer Manifest.xml相关的每个代码：

[...]
<activity
            android:name=".MainActivity"
            android:configChanges="mcc|mnc|locale|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale|layoutDirection|density"
            android:hardwareAccelerated="false"
            android:label="@string/app_name"
            android:launchMode="singleTask"
            android:screenOrientation="landscape"
            android:theme="@style/AppTheme"
            >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <action android:name="android.intent.action.VIEW" />

                <category android:name="android.intent.category.LAUNCHER" />
                <category android:name="android.intent.category.LEANBACK_LAUNCHER" />
            </intent-filter>
            <meta-data
                android:name="unityplayer.UnityActivity"
                android:value="true" />
        </activity>
        <activity
            android:name=".ViewerPlaneActivity"
android:configChanges="mcc|mnc|locale|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale|layoutDirection|density"
            android:hardwareAccelerated="false"
            android:label=""
            android:screenOrientation="landscape"
            android:theme="@style/AppTheme"
            >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <action android:name="android.intent.action.VIEW" />
            </intent-filter>
            <meta-data
                android:name="unityplayer.UnityActivity"
                android:value="true" />
        </activity>
[...]

我应用程序的MainActivity：

public class MainActivity extends AppCompatActivity {
[...]
    public UnityPlayer mUnityPlayer;
   public static UnityPlayerActivity currentActivity;
    private boolean switchToAnAnotherUnityAct=false;

[...]
 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        mUnityPlayer = new UnityPlayer(this);
        setContentView(R.layout.viewer_view_simple_viewer);
        replaceUnityPlayerOnFrameLayout();
        mUnityPlayer.getView().requestFocus();
        currentActivity = this;
[...]
}
    private void replaceUnityPlayerOnFrameLayout(){
        FrameLayout frameLayout = findViewById(R.id.unity_player_layout);
        if( mUnityPlayer.getView().getParent()==null)
        frameLayout.addView(mUnityPlayer.getView());
    }
    @Override
    protected void onDestroy() {
        if(!switchToAnAnotherUnityAct)mUnityPlayer.destroy();
        super.onDestroy();
    }
    @Override
    protected void onPause() {
        super.onPause();
        if(!switchToAnAnotherUnityAct)mUnityPlayer.pause();
    }
    @Override
    protected void onResume() {
        super.onResume();
        if(!switchToAnAnotherUnityAct){
            mUnityPlayer.resume();
            replaceUnityPlayerOnFrameLayout();
        }
    }

    @Override
    protected void onStart() {
        super.onStart();
        mUnityPlayer.start();
        switchToAnAnotherUnityAct=false;
    }

    @Override
    protected void onStop() {
        super.onStop();
        if(!switchToAnAnotherUnityAct)mUnityPlayer.stop();
    }
    @Override
    public void onLowMemory() {
        super.onLowMemory();
        mUnityPlayer.lowMemory();
    }
    @Override
    public void onTrimMemory(int level) {
        super.onTrimMemory(level);
        if (level == TRIM_MEMORY_RUNNING_CRITICAL) {
            mUnityPlayer.lowMemory();
        }
    }
    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        mUnityPlayer.configurationChanged(newConfig);
    }
    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        mUnityPlayer.windowFocusChanged(hasFocus);
    }
    public void onClickSizeSettings(View view) {
        FrameLayout frameLayout = findViewById(R.id.unity_player_layout);
        frameLayout.removeAllViews();
        switchToAnAnotherUnityAct=true;
        Intent intent = new Intent(this, ViewerPlaneActivity.class);
        this.startActivity(intent);
    }
[...]

子活动：

public class ViewerPlaneActivity extends AppCompatActivity {
    public UnityPlayer mUnityPlayer;
    public static ViewerPlaneActivity currentActivity;
 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        currentActivity = this;
        mUnityPlayer= MainActivity.currentActivity.mUnityPlayer;
        setContentView(R.layout.viewer_plane_unit);
        FrameLayout frameLayout = findViewById(R.id.unity_player_layout);
        frameLayout.addView(mUnityPlayer.getView());
        mUnityPlayer.getView().requestFocus();
[...]
}
    private void replaceUnityPlayerOnFrameLayout(){
        FrameLayout frameLayout = findViewById(R.id.unity_player_layout);
        if( mUnityPlayer.getView().getParent()==null)
            frameLayout.addView(mUnityPlayer.getView());
    }
    @Override
    public void onTrimMemory(int level) {
        super.onTrimMemory(level);
        if (level == TRIM_MEMORY_RUNNING_CRITICAL) {
            mUnityPlayer.lowMemory();
        }
    }
    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        mUnityPlayer.configurationChanged(newConfig);
    }
    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        mUnityPlayer.windowFocusChanged(hasFocus);
    }
    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        return mUnityPlayer.injectEvent(event);
    }
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
         return mUnityPlayer.injectEvent(event);
    }
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        return mUnityPlayer.injectEvent(event);
    }
    public void onClickAnchorPlane(View view){
[...]
        finish();
    }
    @Override
    public void finish() {
        super.finish();
        FrameLayout frameLayout = findViewById(R.id.unity_player_layout);
        frameLayout.removeAllViews();
    }
    @Override
    protected void onPause() {
        super.onPause();
        mUnityPlayer.pause();
    }
    @Override
    protected void onResume() {
        super.onResume();
        replaceUnityPlayerOnFrameLayout();
        mUnityPlayer.resume();
    }
    @Override
    protected void onStart() {
        super.onStart();
        mUnityPlayer.start();
    }

结果比我预期的要显示UnityPlayer，但我得到的只是一个黑屏。零错误。

我精确到我没有在我的MainActivity上返回的问题，在那里UnityPlayer工作并正确显示查看器。只有SecondViewer，在那里我得到了一个黑屏，我希望看到的只是显示我的飞机和相机的统一。

谢谢你的帮助。

Answer 1

对于finish，我没有找到解决问题的方法，所以我在我的主布局上使用了两个ViewStub。