1 files changed, 64 insertions, 0 deletions
diff --git a/library/src/main/java/moe/yuuta/flow/widgets/FlowPager.java b/library/src/main/java/moe/yuuta/flow/widgets/FlowPager.java
new file mode 100644
index 0000000..c821eef
--- /dev/null
+++ b/library/src/main/java/moe/yuuta/flow/widgets/FlowPager.java
@@ -0,0 +1,64 @@
+package moe.yuuta.flow.widgets;
+
+import android.content.Context;
+import android.os.Build;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.View;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.FragmentPagerAdapter;
+import androidx.viewpager.widget.ViewPager;
+
+public class FlowPager extends ViewPager {
+    public FlowPager(@NonNull Context context) {
+        super(context);
+    }
+
+    public FlowPager(@NonNull Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    // Thanks to https://stackoverflow.com/a/32488566/6792243
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+
+        if(null != getAdapter()) {
+            int height = 0;
+            View child = ((FragmentPagerAdapter) getAdapter()).getItem(getCurrentItem()).getView();
+            if (child != null) {
+                child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
+                height = child.getMeasuredHeight();
+                // TODO: Support api-14 and api-15?
+                if (Build.VERSION.SDK_INT >= 16 && height < getMinimumHeight()) {
+                    height = getMinimumHeight();
+                }
+            }
+
+            int newHeight = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
+            if (getLayoutParams().height != 0 && heightMeasureSpec != newHeight) {
+                getLayoutParams().height = height;
+
+            } else {
+                heightMeasureSpec = newHeight;
+            }
+        }
+
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+    }
+
+    // Thanks to https://stackoverflow.com/a/13437997/6792243
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        return false;
+    }
+
+    // Thanks to https://stackoverflow.com/a/13437997/6792243
+    @Override
+    public boolean onInterceptTouchEvent(MotionEvent event) {
+        return false;
+    }
+
+}