Android Unity - change launcher activity

Question

I have just started learning about Unity so this may seem like a stupid question.

I have made a small minigame that renders a character when the device camera sees a specific image. My problem is that I want to show some kind of menu before the unity activity is triggered. For example in my code, I changed my launcher activity to be my main activity and when the start button in pressed then I would like that the unity activity would be triggered (and my device camera will open). Unfortunately it's not working (my app crashes when I press the button) and my logcat doesn't show anything.

This is my manifest

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="imp.diana.samurai"
    android:installLocation="preferExternal"
    android:theme="@android:style/Theme.NoTitleBar"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="23" />

    <uses-feature android:name="android.hardware.camera" />

    <supports-screens
        android:anyDensity="true"
        android:largeScreens="true"
        android:normalScreens="true"
        android:smallScreens="true"
        android:xlargeScreens="true" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <uses-feature android:glEsVersion="0x00020000" />
    <uses-feature
        android:name="android.hardware.camera.autofocus"
        android:required="false" />
    <uses-feature
        android:name="android.hardware.camera.front"
        android:required="false" />
    <uses-feature
        android:name="android.hardware.touchscreen"
        android:required="false" />
    <uses-feature
        android:name="android.hardware.touchscreen.multitouch"
        android:required="false" />
    <uses-feature
        android:name="android.hardware.touchscreen.multitouch.distinct"
        android:required="false" />

    <android:uses-permission android:name="android.permission.READ_PHONE_STATE" />

    <application
        android:debuggable="false"
        android:icon="@drawable/app_icon"
        android:isGame="true"
        android:label="@string/app_name"
        android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
        <activity
            android:name=".UnityPlayerNativeActivity"
            android:configChanges="mcc|mnc|locale|touchscreen|keyboard|keyboardHidden|navigation|orientation|screenLayout|uiMode|screenSize|smallestScreenSize|fontScale"
            android:label="@string/app_name"
            android:launchMode="singleTask"
            android:screenOrientation="fullSensor" >

            <meta-data
                android:name="unityplayer.UnityActivity"
                android:value="true" />
            <meta-data
                android:name="unityplayer.ForwardNativeEventsToDalvik"
                android:value="false" />
        </activity>
        <activity
            android:name="com.unity3d.player.VideoPlayer"
            android:configChanges="fontScale|keyboard|keyboardHidden|locale|mnc|mcc|navigation|orientation|screenLayout|screenSize|smallestScreenSize|uiMode|touchscreen"
            android:label="@string/app_name"
            android:screenOrientation="portrait" >
        </activity>
        <!--
            To support devices using the TI S3D library for stereo mode we must 
            add the following library.
            Devices that require this are: ODG X6 
        -->
        <uses-library
            android:name="com.ti.s3d"
            android:required="false" />
<!--             To support the ODG R7 in stereo mode we must add the following library. -->
        <uses-library
            android:name="com.osterhoutgroup.api.ext"
            android:required="false" />

        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main">

            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        </activity>
    </application>

</manifest> <!-- android:installLocation="preferExternal" -->

Main Activity

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button start = (Button) findViewById(R.id.button);
        start.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(MainActivity.this, UnityPlayer.class));
            }
        });
    }

UnityPlayerActivity

public class UnityPlayerActivity extends Activity
{
    protected UnityPlayer mUnityPlayer; // don't change the name of this variable; referenced from native code

    // Setup activity layout
    @Override protected void onCreate (Bundle savedInstanceState)
    {
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        super.onCreate(savedInstanceState);

        getWindow().setFormat(PixelFormat.RGBX_8888); // <--- This makes xperia play happy

        mUnityPlayer = new UnityPlayer(this);
        if (mUnityPlayer.getSettings().getBoolean("hide_status_bar", true))
        {
            getWindow ().setFlags (WindowManager.LayoutParams.FLAG_FULLSCREEN,
                                   WindowManager.LayoutParams.FLAG_FULLSCREEN);
        }

        setContentView(mUnityPlayer);
        mUnityPlayer.requestFocus();
    }

    // Quit Unity
    @Override protected void onDestroy ()
    {
        mUnityPlayer.quit();
        super.onDestroy();
    }

    // Pause Unity
    @Override protected void onPause()
    {
        super.onPause();
        mUnityPlayer.pause();
    }

    // Resume Unity
    @Override protected void onResume()
    {
        super.onResume();
        mUnityPlayer.resume();
    }

    // This ensures the layout will be correct.
    @Override public void onConfigurationChanged(Configuration newConfig)
    {
        super.onConfigurationChanged(newConfig);
        mUnityPlayer.configurationChanged(newConfig);
    }

    // Notify Unity of the focus change.
    @Override public void onWindowFocusChanged(boolean hasFocus)
    {
        super.onWindowFocusChanged(hasFocus);
        mUnityPlayer.windowFocusChanged(hasFocus);
    }

    // For some reason the multiple keyevent type is not supported by the ndk.
    // Force event injection by overriding dispatchKeyEvent().
    @Override public boolean dispatchKeyEvent(KeyEvent event)
    {
        if (event.getAction() == KeyEvent.ACTION_MULTIPLE)
            return mUnityPlayer.injectEvent(event);
        return super.dispatchKeyEvent(event);
    }

    // Pass any events not handled by (unfocused) views straight to UnityPlayer
    @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); }
    /*API12*/ public boolean onGenericMotionEvent(MotionEvent event)  { return mUnityPlayer.injectEvent(event); }
}

Any idea? Any help would be greatly appreciated!

Answer 1

You probably haven't listed UnityPlayerActivity in the AndroidManifest.xml file using the tags <activity></activity> e.g.

<activity
     android:name=".UnityPlayerActivity"
     android:label="@string/app_name"
     ... 
     >
</activity>