MapFragment in ScrollView

Question

I have one of the new MapFragments in a ScrollView. Actually it\'s a SupportMapFragment, but anyway. It works, but there are two problems:

Answer 1

For me adding a transparent ImageView did not help remove the black mask completely. The top and bottom parts of map still showed the black mask while scrolling.

So the solution for it, I found in this answer with a small change. I added,

android:layout_marginTop="-100dp"
android:layout_marginBottom="-100dp"

to my map fragment since it was vertical scrollview. So my layout now looked this way:

<RelativeLayout
    android:id="@+id/map_layout"
    android:layout_width="match_parent"
    android:layout_height="300dp">

    <fragment
        android:id="@+id/mapview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="-100dp"
        android:layout_marginBottom="-100dp"
        android:name="com.google.android.gms.maps.MapFragment"/>

    <ImageView
        android:id="@+id/transparent_image"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@color/transparent" />

</RelativeLayout>   

To solve the second part of the question I set requestDisallowInterceptTouchEvent(true) for my main ScrollView. When the user touched the transparent image and moved I disabled the touch on the transparent image for MotionEvent.ACTION_DOWN and MotionEvent.ACTION_MOVE so that map fragment can take Touch Events.

ScrollView mainScrollView = (ScrollView) findViewById(R.id.main_scrollview);
ImageView transparentImageView = (ImageView) findViewById(R.id.transparent_image);

transparentImageView.setOnTouchListener(new View.OnTouchListener() {

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        int action = event.getAction();
        switch (action) {
           case MotionEvent.ACTION_DOWN:
                // Disallow ScrollView to intercept touch events.
                mainScrollView.requestDisallowInterceptTouchEvent(true);
                // Disable touch on transparent view
                return false;

           case MotionEvent.ACTION_UP:
                // Allow ScrollView to intercept touch events.
                mainScrollView.requestDisallowInterceptTouchEvent(false);
                return true;

           case MotionEvent.ACTION_MOVE:
                mainScrollView.requestDisallowInterceptTouchEvent(true);
                return false;

           default: 
                return true;
        }   
    }
});

This worked for me. Hope it helps you..

Answer 2

<ScrollView
            android:layout_width="match_parent"
    ::
    ::
    ::
      <FrameLayout
            android:id="@+id/map_add_business_one_rl"
            android:layout_width="match_parent"
            android:layout_height="100dp"
         >
                        <fragment

                            android:id="@+id/map"
                            android:name="com.google.android.gms.maps.SupportMapFragment"
                            android:layout_width="match_parent"
                            android:layout_height="match_parent"
                            android:layout_marginTop="-100dp"
                            android:layout_marginBottom="-100dp"

                            />

        </FrameLayout>

    ::
    ::
    ::
     </ScrollView>

Answer 3

I used this structures and I overcame the problem.

I used a container view for maps fragment.

<ScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:text="Another elements in scroll view1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />


        <com.erolsoftware.views.MyMapFragmentContainer
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="250dp">

            <fragment
                xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:id="@+id/eventMap"
                tools:context="com.erolsoftware.eventapp.EventDetails"
                android:name="com.google.android.gms.maps.SupportMapFragment"/>

        </com.erolsoftware.views.MyMapFragmentContainer>

        <TextView
            android:text="Another elements in scroll view2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />



    </LinearLayout>




</ScrollView>

The container class:

public class MyMapFragmentContainer extends LinearLayout {


    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev)
    {
        if (ev.getActionMasked() == MotionEvent.ACTION_DOWN)
        {
            ViewParent p = getParent();
            if (p != null)
                p.requestDisallowInterceptTouchEvent(true);
        }

        return false;
    }

    public MyMapFragmentContainer(Context context) {
        super(context);
    }

    public MyMapFragmentContainer(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public MyMapFragmentContainer(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

}

Answer 4

Applying a transparent image over the mapview fragment seems to resolve the issue. It's not the prettiest, but it seems to work. Here's an XML snippet that shows this:

<RelativeLayout
        android:id="@+id/relativeLayout1"
        android:layout_width="match_parent"
        android:layout_height="300dp" >

        <fragment
            android:id="@+id/map"
            android:name="com.google.android.gms.maps.MapFragment"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"/>

        <ImageView
            android:id="@+id/imageView123"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:src="@drawable/temp_transparent" />         
</RelativeLayout>

Answer 5

For the second part of the question - you can derive a fragment class from SupportMapFragment, and use that in your layout instead. You can then override Fragment#onCreateView, and instantiate your custom MapView there.

If that does not work, you can always create your own fragment - then you just need to take care of calling all the lifecycle methods yourself (onCreate, onResume, etc). This answer has some more details.

Answer 6

No need to struggle with customScrollViews and transparent layout files. simply use lighter version of google map and your issue will be resolved.

  map:liteMode="true"

add above property inside map fragment in your layout file. and issue will be fixed.