onItemClick added

Author: swanhtet1992

library/src/main/java/com/etsy/android/grid/ExtendableListView.java

@@ -143,6 +143,7 @@ public abstract class ExtendableListView extends AbsListView {
     private FlingRunnable mFlingRunnable;
 
     protected boolean mClipToPadding;
+    private PerformClick mPerformClick;
 
     /**
      * A class that represents a fixed view in a list, for example a header at the top
@@ -939,7 +940,15 @@ private boolean onTouchUpScrolling(final MotionEvent event) {
     }
 
     private boolean onTouchUpTap(final MotionEvent event) {
-        // TODO : implement onListItemClick stuff here
+        if (mPerformClick == null) {
+            invalidate();
+            mPerformClick = new PerformClick();
+        }
+        final PerformClick performClick = mPerformClick;
+        performClick.mClickMotionPosition = mMotionPosition;
+        performClick.rememberWindowAttachCount();
+
+        performClick.run();
         return true;
     }
 
@@ -2674,4 +2683,40 @@ public void onRestoreInstanceState(Parcelable state) {
         }
         requestLayout();
     }
+
+    private class PerformClick extends WindowRunnnable implements Runnable {
+        int mClickMotionPosition;
+
+        public void run() {
+            if (mDataChanged) return;
+
+            final ListAdapter adapter = mAdapter;
+            final int motionPosition = mClickMotionPosition;
+            if (adapter != null && mItemCount > 0 &&
+                    motionPosition != INVALID_POSITION &&
+                    motionPosition < adapter.getCount() && sameWindow()) {
+                final View view = getChildAt(motionPosition); // a fix by @pboos
+
+                if (view != null) {
+                    performItemClick(view, motionPosition + mFirstPosition, adapter.getItemId(motionPosition));
+                }
+            }
+        }
+    }
+
+    /**
+     * A base class for Runnables that will check that their view is still attached to
+     * the original window as when the Runnable was created.
+     */
+    private class WindowRunnnable {
+        private int mOriginalAttachCount;
+
+        public void rememberWindowAttachCount() {
+            mOriginalAttachCount = getWindowAttachCount();
+        }
+
+        public boolean sameWindow() {
+            return hasWindowFocus() && getWindowAttachCount() == mOriginalAttachCount;
+        }
+    }
 }

sample/src/main/java/com/etsy/android/sample/StaggeredGridActivity.java

@@ -8,11 +8,13 @@
 import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.AbsListView;
+import android.widget.AdapterView;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import com.etsy.android.grid.StaggeredGridView;
 
-public class StaggeredGridActivity extends Activity implements AbsListView.OnScrollListener {
+public class StaggeredGridActivity extends Activity implements AbsListView.OnScrollListener, AbsListView.OnItemClickListener {
 
     private static final String TAG = "StaggeredGridActivity";
     public static final String SAVED_DATA_KEY = "SAVED_DATA";
@@ -60,6 +62,8 @@ protected void onCreate(Bundle savedInstanceState) {
         mGridView.setAdapter(mAdapter);
 
         mGridView.setOnScrollListener(this);
+
+        mGridView.setOnItemClickListener(this);
     }
 
     @Override
@@ -100,4 +104,9 @@ private void onLoadMoreItems() {
         mAdapter.notifyDataSetChanged();
         mHasRequestedMore = false;
     }
+
+    @Override
+    public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
+        Toast.makeText(getApplicationContext(), "Clicked: " + position, Toast.LENGTH_LONG).show();
+    }
 }