I am working on an android app that needs to load a UnityPlayer instance in an activiy, using code from the following forum post as a guide:
http://forum.unity3d.com/threads/98315-Using-Unity-Android-In-a-Sub-View .
Initially the application is correctly displaying the UnityPlayer inside an activity called "UnityActivity.java".
The problem starts when the user navigates back to the MainActivity (by either pressing the hardware back button or clicking on the ActionBar back button) and then tries to re-open the UnityActivity - in which case a black screen is shown instead of the UnityPlayer. A user in the forums suggested forwarding the onPause and onResume lifecycle events to the UnityPlayer, as shown in the code bellow. When doing that, however, the following errors show up and the app crashes.
This is logged when navigating to the UnityActivity for the first time:
W/libc(21095): pthread_create sched_setscheduler call failed: Operation not permitted
This error is logged when clicking the back button:
W/Choreographer(20963): Already have a pending vsync event. There should only be one at a time.
This error is logged when navigating to the UnityActivity for the second time:
A/libc(21095): Fatal signal 11 (SIGSEGV) at 0x00000000 (code=1), thread 21176 (Thread-5073)
...at which point I get kicked out of the application.
Code
This is an excerpt of the main activity MainActivity.java :
public void startUnityActivity(View view) {
Intent intent = new Intent(this, UnityActivity.class);
startActivity(intent);
}
This is an excerpt of the Unity activity UnityActivity.java :
public class UnityActivity extends ActionBarActivity {
UnityPlayer m_UnityPlayer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_unity);
m_UnityPlayer = new UnityPlayer(this);
int glesMode = m_UnityPlayer.getSettings().getInt("gles_mode", 1);
m_UnityPlayer.init(glesMode, false);
FrameLayout layout = (FrameLayout) findViewById(R.id.unityView);
FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);
layout.addView(m_UnityPlayer, 0, lp);
m_UnityPlayer.windowFocusChanged(true);
m_UnityPlayer.resume();
}
@Override
public void onWindowFocusChanged(boolean hasFocus)
{
super.onWindowFocusChanged(hasFocus);
m_UnityPlayer.windowFocusChanged(hasFocus);
}
@Override
public void onPause() {
super.onPause();
m_UnityPlayer.pause();
}
@Override
public void onResume() {
super.onResume();
m_UnityPlayer.resume();
}
This is how the activities are described in the manifest ../AndroidManifest.xml:
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.package.example.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.package.example.UnityActivity"
android:label="@string/title_activity_unity"
android:screenOrientation="portrait"
android:launchMode="singleTask"
android:parentActivityName="com.package.example.MainActivity"
android:configChanges="mcc|mnc|locale|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale">
<meta-data android:name="unityplayer.UnityActivity" android:value="true" />
<meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="true" />
</activity>
</application>
This is how the layout of the UnityActivity is defined ../res/layout/activity_unity.xml:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.package.example.UnityActivity"
tools:ignore="MergeRootFrame" >
<FrameLayout
android:id="@+id/unityView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
</FrameLayout>
</FrameLayout>
I'd be thankful for any tips and solutions pointing me in the right direction.
