CODEWITHSUNDEEP
androidandroid-layoutsurfaceviewslidingdrawer
Richard Lewin
Richard Lewin

Reputation: 1870

SlidingDrawer hidden by image in SurfaceView

I have both a SlidingDrawer and a custom SurfaceView that renders an image. I have just tried to drag the SlidingDrawer up and in doing so have discovered that it goes behind the image in the SurfaceView and is completely hidden.

As you can imagine this won't be much use to the user and therefore need the image to always fall behind the SlidingDrawer when it is pulled up. Is this possible?

Incase it helps this is the SlidingDrawer in the xml:

<SlidingDrawer
             android:id="@+id/drawer"
             android:layout_width="fill_parent"
             android:layout_height="wrap_content"
             android:handle="@+id/handle"
             android:content="@+id/content"
             android:layout_alignParentBottom="true">

             <TextView
                 android:id="@id/handle"
                 android:layout_width="fill_parent"
                 android:layout_height="wrap_content"
                 android:gravity="center"
                 android:paddingTop="5dip"
                 android:paddingBottom="5dip"
                 android:textStyle="bold"
                 android:text="text"/>


            <include layout="@layout/content"
                 android:id="@id/content"
                 android:layout_width="fill_parent"
                 android:layout_height="fill_parent"/>

         </SlidingDrawer>

And this is the SurfaceView in xml:

<FrameLayout android:id="@+id/FrameLayout01" 
        android:layout_width="fill_parent" android:layout_height="fill_parent">
        <com.android.imagemagic.widgets.ImageManipulationSurfaceView
        android:id="@+id/surfaceArea"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" android:layout_gravity="center"/> 
    </FrameLayout>

The SurfaceView is custom and uses the following code in the onDraw() method:

@Override
public void onDraw(Canvas canvas) { 
    super.onDraw(canvas);

    //Clear canvas
    Paint paint = new Paint();
    paint.setXfermode(new PorterDuffXfermode(Mode.CLEAR));
    canvas.drawPaint(paint);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC));

    // Draw image
    canvas.drawBitmap(image, imageX, imageY, null);
}

Upvotes: 5

Views: 2934

Answers (3)

Sunil
Sunil

Reputation: 864

Even I faced the similar problem. But I found a workaround for this.
Just do slideHandleButton.setText(""); when the drawer is closed. This will make the button appear :)

Upvotes: 0

Richard Lewin
Richard Lewin

Reputation: 1870

After much scanning around I have found the (simple) answer to my problem from the following Stack Overflow page: Android: SlidingDrawer disappears under SurfaceView. Quite simply in the SlidingDrawer xml element add:

android:background="#00000000";

Edit

Having reverted back to the my original code after implimenting the background it stopped working again. In the end I found where the other issue I had was that stopped the above solution from working. For everyone else’s benefit, ensure you don't set the SurfaceView z-index to the top via:

sv.setZOrderOnTop(true);

Upvotes: 5

Blundell
Blundell

Reputation: 76466

Have you tried letting your super class draw last so that you draw below it?

@Override
public void onDraw(Canvas canvas) { 
    //Clear canvas
    Paint paint = new Paint();
    paint.setXfermode(new PorterDuffXfermode(Mode.CLEAR));
    canvas.drawPaint(paint);
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC));

    // Draw image
    canvas.drawBitmap(image, imageX, imageY, null);

    super.onDraw(canvas);
}

An alernative to using a sliding draw is to have a button that start's a new activity, then you call overridependingtransition(int enterAnim, int exitAnim) before setContentView() to animate the activity to slide in and out.

Upvotes: 0

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