View pager onclick event logic added

app/src/main/java/me/crosswall/coverflow/demo/Normal2Activity.java

@@ -2,24 +2,33 @@
 
 import android.graphics.Color;
 import android.os.Bundle;
+import android.support.v4.view.GestureDetectorCompat;
 import android.support.v4.view.LinkagePager;
 import android.support.v4.view.PagerAdapter;
 import android.support.v4.view.ViewPager;
 import android.support.v7.app.AppCompatActivity;
 import android.util.Log;
+import android.view.GestureDetector;
 import android.view.Gravity;
+import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import java.util.HashMap;
+import java.util.Map;
+
 import me.crosswall.lib.coverflow.CoverFlow;
 import me.crosswall.lib.coverflow.core.LinkageCoverTransformer;
 import me.crosswall.lib.coverflow.core.LinkagePagerContainer;
 import me.crosswall.lib.coverflow.core.PagerContainer;
 
 public class Normal2Activity extends AppCompatActivity {
 
+    GestureDetectorCompat gestureDetectorCompat;
+    MyPagerAdapter adapter;
+
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -30,7 +39,7 @@ protected void onCreate(Bundle savedInstanceState) {
 
         final ViewPager pager = mContainer.getViewPager();
 
-        PagerAdapter adapter = new MyPagerAdapter();
+        adapter = new MyPagerAdapter();
         pager.setAdapter(adapter);
 
         pager.setOffscreenPageLimit(adapter.getCount());
@@ -50,25 +59,76 @@ protected void onCreate(Bundle savedInstanceState) {
                     .build();
         }
 
+        gestureDetectorCompat = new GestureDetectorCompat(this, new GestureDetector.OnGestureListener() {
+            @Override
+            public boolean onDown(MotionEvent e) {
+                return false;
+            }
+
+            @Override
+            public void onShowPress(MotionEvent e) {
+
+            }
+
+            @Override
+            public boolean onSingleTapUp(MotionEvent e) {
+
+                //Handle on click of view pager
+                handleViewPagerClick(e,adapter.viewList);
+
+                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) {
+                return false;
+            }
+        });
+
+        //To handle on touch of view pager with gesture detector
+        pager.setOnTouchListener(new View.OnTouchListener() {
+            @Override
+            public boolean onTouch(View v, MotionEvent event) {
+                gestureDetectorCompat.onTouchEvent(event);
+                return false;
+            }
+        });
+
     }
 
     private class MyPagerAdapter extends PagerAdapter {
 
+        public Map<Integer,View> viewList = new HashMap<Integer,View>();
+
         @Override
         public Object instantiateItem(ViewGroup container, final int position) {
             final TextView view = new TextView(Normal2Activity.this);
             view.setText("Item " + position);
             view.setGravity(Gravity.CENTER);
             view.setBackgroundColor(Color.argb(255, position * 50, position * 10, position * 50));
-            view.setOnClickListener(new View.OnClickListener() {
+            /*view.setOnClickListener(new View.OnClickListener() {
                 @Override
                 public void onClick(View v) {
                     Toast.makeText(Normal2Activity.this, "position: " + position, Toast.LENGTH_SHORT).show();
                     System.out.println("position:::::::::::::" + position);
                 }
-            });
+            });*/
 
             container.addView(view);
+
+            //Adding views to view map
+            viewList.put(position,view);
+
             return view;
         }
 
@@ -88,5 +148,31 @@ public boolean isViewFromObject(View view, Object object) {
         }
     }
 
+    /**
+     * Handle the view pager click
+     * @param event (Single Tap Event)
+     * @param viewMap (List of view pager child views)
+     */
+    private void handleViewPagerClick(MotionEvent event, Map<Integer,View> viewMap){
+        for (Map.Entry<Integer,View> entry : viewMap.entrySet()){
+            int location[] = new int[2];
+            entry.getValue().getLocationOnScreen(location);
+            int viewX = location[0];
+            int viewY = location[1];
+            //point is inside view bounds
+            if(( event.getRawX() > viewX && event.getRawX() < (viewX + entry.getValue().getWidth())) &&
+                    ( event.getRawY() > viewY && event.getRawY() < (viewY + entry.getValue().getHeight()))){
+                //Here you will get clicked position
+                Log.d("Normal2Activity", "Clicked Position " + entry.getKey());
+                onClick(entry.getKey());
+                return ;
+            }
+        }
+    }
+
+    private void onClick(final int position){
+        Toast.makeText(Normal2Activity.this,"Clicked Postion - "+ position,Toast.LENGTH_SHORT).show();
+    }
+
 
 }