Added transition on swipe right.

app/src/main/java/pl/tpolgrabia/urbanexplorer/MainActivity.java

@@ -1,10 +1,16 @@
 package pl.tpolgrabia.urbanexplorer;
 
 import android.os.Bundle;
+import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentTransaction;
+import android.support.v4.view.GestureDetectorCompat;
 import android.support.v7.app.ActionBarActivity;
+import android.util.Log;
+import android.view.GestureDetector;
 import android.view.MenuItem;
+import android.view.MotionEvent;
+import android.widget.LinearLayout;
 import com.nostra13.universalimageloader.cache.memory.impl.WeakMemoryCache;
 import com.nostra13.universalimageloader.core.DisplayImageOptions;
 import com.nostra13.universalimageloader.core.ImageLoader;
@@ -12,13 +18,28 @@ import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
 import pl.tpolgrabia.urbanexplorer.dto.PanoramioImageInfo;
 import pl.tpolgrabia.urbanexplorer.fragments.HomeFragment;
 import pl.tpolgrabia.urbanexplorer.fragments.PanoramioShowerFragment;
+import pl.tpolgrabia.urbanexplorer.fragments.WikiLocationsFragment;
 import pl.tpolgrabia.urbanexplorer.utils.ImageLoaderUtils;
 
-public class MainActivity extends ActionBarActivity  {
+public class MainActivity extends ActionBarActivity implements GestureDetector.OnGestureListener {
 
     private static final String CLASS_TAG = MainActivity.class.getSimpleName();
     private static final String PHOTO_BACKSTACK = "PHOTO_BACKSTACK";
+    private static final float SWIPE_VELOCITY_THRESHOLD = 20;
+    private static final int HOME_FRAGMENT_ID = 0;
+    private static final int WIKI_FRAGMENT_ID = 1;
+    private static final double MAX_FRAGMENT_ID = WIKI_FRAGMENT_ID;
+    private static final double MIN_FRAGMENT_ID = HOME_FRAGMENT_ID;
     public static DisplayImageOptions options;
+    private GestureDetectorCompat gestureDetector;
+    private float SWIPE_THRESHOLD = 50;
+    private int currentFragmentId = 0;
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        gestureDetector.onTouchEvent(event);
+        return super.onTouchEvent(event);
+    }
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -45,6 +66,9 @@ public class MainActivity extends ActionBarActivity  {
             .add(R.id.fragments, new HomeFragment())
             .commit();
 
+        LinearLayout locations = (LinearLayout) findViewById(R.id.locations);
+        // locations.setOnTouchListener(new OnSwipeTouchListener);
+        gestureDetector = new GestureDetectorCompat(this, this);
     }
 
     @Override
@@ -76,4 +100,121 @@ public class MainActivity extends ActionBarActivity  {
         ctx.commit();
 
     }
+
+    @Override
+    public boolean onDown(MotionEvent e) {
+        return false;
+    }
+
+    @Override
+    public void onShowPress(MotionEvent e) {
+
+    }
+
+    @Override
+    public boolean onSingleTapUp(MotionEvent e) {
+        return false;
+    }
+
+    @Override
+    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
+        return false;
+    }
+
+    @Override
+    public void onLongPress(MotionEvent e) {
+
+    }
+
+    @Override
+    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
+
+        float diffx = e2.getX() - e1.getX();
+        float diffy = e2.getY() - e1.getY();
+        Log.d(CLASS_TAG, "Flinging... diffx: " + diffx + " diffy" + diffy
+        + ", velocityx: " + velocityX + ", velocityY: " + velocityY);
+
+        if (Math.abs(diffx) > Math.abs(diffy)) {
+            // horizontal moves
+            if (Math.abs(diffx) < SWIPE_THRESHOLD) {
+                return true;
+            }
+
+            if (Math.abs(velocityX) < SWIPE_VELOCITY_THRESHOLD) {
+                return true;
+            }
+
+            if (diffx > 0) {
+                // swipe right
+                swipeRight();
+            } else {
+                // swipe left
+                swipeLeft();
+            }
+
+        } else {
+            // vertical moves
+
+            if (Math.abs(diffy) < SWIPE_THRESHOLD) {
+                return true;
+            }
+
+            if (Math.abs(velocityY) < SWIPE_VELOCITY_THRESHOLD) {
+                return true;
+            }
+
+            if (diffy > 0) {
+                // swipe down
+                swipeDown();
+            } else {
+                // swipe up
+                swipeUp();
+            }
+        }
+
+        return true;
+    }
+
+    private void swipeDown() {
+
+    }
+
+    private void swipeUp() {
+
+    }
+
+    private void swipeLeft() {
+        currentFragmentId = (int)Math.max(MIN_FRAGMENT_ID, currentFragmentId-1);
+        switchFragment();
+    }
+
+    private void switchFragment() {
+        switch (currentFragmentId) {
+            case HOME_FRAGMENT_ID:
+                // switch to home fragment
+                Log.d(CLASS_TAG, "Switching to home fragment");
+                switchFragment(new HomeFragment());
+                break;
+            case WIKI_FRAGMENT_ID:
+                // switch to wiki fragment
+                Log.d(CLASS_TAG, "Switching to wiki fragment");
+                switchFragment(new WikiLocationsFragment());
+                break;
+        }
+
+    }
+
+    private void switchFragment(Fragment fragment) {
+
+        FragmentManager fragmentManager = getSupportFragmentManager();
+        FragmentTransaction ctx = fragmentManager.beginTransaction();
+        ctx.replace(R.id.fragments, fragment);
+        ctx.addToBackStack(null);
+        ctx.commit();
+    }
+
+    private void swipeRight() {
+        currentFragmentId = (int)Math.min(MAX_FRAGMENT_ID, currentFragmentId+1);
+        switchFragment();
+    }
 }

app/src/main/res/layout/activity_main.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout
+<FrameLayout
         android:id="@+id/fragments"
         xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:tools="http://schemas.android.com/tools"
@@ -11,17 +11,5 @@
         android:paddingBottom="@dimen/activity_vertical_margin"
         tools:context="pl.tpolgrabia.urbanexplorer.MainActivity" android:orientation="horizontal">
 
-    <!--<Toolbar android:id="@+id/navbar"-->
-             <!--android:layout_width="match_parent"-->
-             <!--android:layout_height="wrap_content">-->
 
-    <!--</Toolbar>-->
+</FrameLayout>
-
-    <!--<fragment-->
-            <!--android:layout_width="match_parent"-->
-            <!--android:layout_height="wrap_content"-->
-            <!--android:name="pl.tpolgrabia.urbanexplorer.fragments.HomeFragment"-->
-            <!--android:id="@+id/home_frag"-->
-            <!--tools:layout="@layout/fragment_home"/>-->
-
-</LinearLayout>