android multi activity example: add manifest (#6036)

This example needs a custom manifest, the one created by
the PG doeswn't contain the second activity.

Also git unignore manifest and srcJava

Fixes #6036

examples/android/.gitignore

@@ -1,5 +1,3 @@
 **/.gitignore
-**/AndroidManifest.xml
 **/res/
-**/*.gradle
-**/srcJava
+**/*.gradle

examples/android/androidMultiOFActivitiesExample/AndroidManifest.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="cc.openframeworks.androidMultiOFActivitiesExample"
+    android:installLocation="preferExternal">
+
+    <!-- Add custom permissions here, for example -->
+    <!--<uses-permission android:name="android.permission.CAMERA"/>-->
+    <!--<uses-permission android:name="android.permission.INTERNET"/>-->
+
+    <application
+        android:allowBackup="true"
+        android:icon="@drawable/ic_launcher"
+        android:label="@string/app_name"
+        android:theme="@style/AppTheme"
+        >
+
+        <!-- If you want to use a custom android activity, then change the name here -->
+        <activity
+            android:name="cc.openframeworks.androidMultiOFActivitiesExample.OFActivityA"
+            android:label="@string/app_name"  android:configChanges="orientation|screenSize">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <!-- If you want to use a custom android activity, then change the name here -->
+        <activity
+            android:name="cc.openframeworks.androidMultiOFActivitiesExample.OFActivityB"
+            android:label="@string/app_name"  android:configChanges="orientation|screenSize">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

examples/android/androidMultiOFActivitiesExample/srcJava/cc/openframeworks/androidMultiOFActivitiesExample/OFActivityB.java

@@ -1,5 +1,32 @@
 package cc.openframeworks.androidMultiOFActivitiesExample;
 
+import android.content.Intent;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.RelativeLayout;
+
 public class OFActivityB extends cc.openframeworks.OFActivity{
-
+
+    @Override
+    public void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+        Button btn = new Button(this);
+        btn.setText("Go To Activity A");
+        btn.setOnClickListener(new View.OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                startActivity(new Intent(OFActivityB.this, OFActivityA.class));
+            }
+        });
+        RelativeLayout rootView = (RelativeLayout)findViewById(R.id.relativeLayout1);
+        RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
+        params.addRule(RelativeLayout.CENTER_HORIZONTAL);
+        params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
+        rootView.addView(btn, params);
+        Log.d("OFActivityB", "onCreate");
+    }
 }