Android: can height of SlidingDrawer be set with wrap_content?

Android Problem Overview

I'm trying to implement a SlidingDrawer that will occupy the full screen width, but whose height is determined dynamically by its contents: in other words, standard fill_parent layout behaviour for the width and wrap_content for the height. That's exactly how I've specified it in the layout XML (see below) but the sliding drawer always opens to the full screen height. The height of my content varies, but typically it's only about half the screen height, so I end up with a big gap underneath it. What I'd like is for the content to sit neatly on the bottom of the screen.

I've tried everything I can think of to fix it but nothing's worked so far. If I set the SlidingDrawer's layout_height to a specific value (e.g. 160dip) it works, but that's not what I need: it has to be dynamic. Of course I've made sure all the child elements have their height set to wrap_content too.

The documentation on SlidingDrawer is a bit vague on this and I haven't been able to find any examples that do what I'm after either. If anyone can see where I'm going wrong I'd really appreciate your help!

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <ViewFlipper
        android:id="@+id/ImageFlipper"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <ImageView
            android:id="@+id/imageView0"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:scaleType="centerCrop" />
    
        <ImageView
            android:id="@+id/imageView1"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:scaleType="centerCrop" />
    
        <ImageView
            android:id="@+id/imageView2"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:scaleType="centerCrop" />
    
    </ViewFlipper>

    <SlidingDrawer
        android:id="@+id/infoDrawer"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:handle="@+id/infoDrawerHandle"
        android:content="@+id/infoDrawerContent"
        android:allowSingleTap="false"
        android:layout_alignParentBottom="true"
        android:orientation="vertical" >
        
        <!-- Sliding drawer handle -->
        <ImageView
            android:id="@id/infoDrawerHandle"
            android:src="@drawable/info_handle_closed"
            android:layout_width="wrap_content" 
            android:layout_height="wrap_content" />
        
        <!-- Sliding drawer content: a scroller containing a group of text views
        laid out in a LinearLayout -->
        <ScrollView
            android:id="@id/infoDrawerContent"
            android:background="@drawable/info_background"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:fillViewport="false" >

            <LinearLayout
                android:id="@id/infoDrawerContent"
                android:orientation="vertical"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:paddingRight="5dip" >
            
                <TextView
                    android:id="@+id/infoTitle"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textColor="#ffffff"
                    android:textSize="16dip"
                    android:textStyle="bold" />
            
                <TextView
                    android:id="@+id/infoCreator"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textColor="#ffffff"
                    android:textSize="14dip"
                    android:textStyle="italic"
                    android:paddingBottom="10dip" />
            
                <TextView
                    android:id="@+id/infoDescription"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textColor="#ffffff"
                    android:textSize="14dip"
                    android:paddingBottom="10dip" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textColor="#ffcc00"
                    android:textSize="14dip"
                    android:textStyle="bold"
                    android:text="@string/heading_pro_tip" />
            
                <TextView
                    android:id="@+id/infoProTip"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textColor="#ffcc00"
                    android:textSize="14dip" />

            </LinearLayout>    

        </ScrollView>

    </SlidingDrawer>

</RelativeLayout>

Android Solutions

Solution 1 - Android

The onMeasure() method of the SlidingDrawer class basically overrides the layout modes to fill_parent, this is why layout_height="wrap_content" is not working.

To get around this, you can extend SlidingDrawer with a re-implemented onMeasure() method that honors the layout_width and layout_height attributes. You can then use this custom class in your XML layout by replacing <SlidingDrawer ...> with <fully.qualified.package.ClassName ...>.

Note that since the drawer will no longer be filling the parent layout, you will have to enclose it in a LinearLayout with the gravity attribute set to the edge where the drawer should be.

Below are a class I have created for this purpose and an example layout.

WrappingSlidingDrawer class :

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.SlidingDrawer;


public class WrappingSlidingDrawer extends SlidingDrawer {

	public WrappingSlidingDrawer(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		
		int orientation = attrs.getAttributeIntValue("android", "orientation", ORIENTATION_VERTICAL);
		mTopOffset = attrs.getAttributeIntValue("android", "topOffset", 0);
		mVertical = (orientation == SlidingDrawer.ORIENTATION_VERTICAL);
	}

	public WrappingSlidingDrawer(Context context, AttributeSet attrs) {
		super(context, attrs);
		
		int orientation = attrs.getAttributeIntValue("android", "orientation", ORIENTATION_VERTICAL);
		mTopOffset = attrs.getAttributeIntValue("android", "topOffset", 0);
		mVertical = (orientation == SlidingDrawer.ORIENTATION_VERTICAL);
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
        int widthSpecSize =  MeasureSpec.getSize(widthMeasureSpec);

        int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
        int heightSpecSize =  MeasureSpec.getSize(heightMeasureSpec);

        if (widthSpecMode == MeasureSpec.UNSPECIFIED || heightSpecMode == MeasureSpec.UNSPECIFIED) {
            throw new RuntimeException("SlidingDrawer cannot have UNSPECIFIED dimensions");
        }

        final View handle = getHandle();
        final View content = getContent();
        measureChild(handle, widthMeasureSpec, heightMeasureSpec);

        if (mVertical) {
            int height = heightSpecSize - handle.getMeasuredHeight() - mTopOffset;
            content.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(height, heightSpecMode));
            heightSpecSize = handle.getMeasuredHeight() + mTopOffset + content.getMeasuredHeight();
            widthSpecSize = content.getMeasuredWidth();
            if (handle.getMeasuredWidth() > widthSpecSize) widthSpecSize = handle.getMeasuredWidth();
        }
        else {
            int width = widthSpecSize - handle.getMeasuredWidth() - mTopOffset;
            getContent().measure(MeasureSpec.makeMeasureSpec(width, widthSpecMode), heightMeasureSpec);
            widthSpecSize = handle.getMeasuredWidth() + mTopOffset + content.getMeasuredWidth();
            heightSpecSize = content.getMeasuredHeight();
            if (handle.getMeasuredHeight() > heightSpecSize) heightSpecSize = handle.getMeasuredHeight();
        }

        setMeasuredDimension(widthSpecSize, heightSpecSize);
	}
	
	private boolean mVertical;
	private int mTopOffset;
}

Example layout (assuming WrappingSlidingDrawer is in package com.package) :

<FrameLayout android:layout_width="fill_parent"
	         android:layout_height="fill_parent">
	... stuff you want to cover at full-size ...
	<LinearLayout android:layout_width="fill_parent"
		      android:layout_height="fill_parent"
		      android:gravity="bottom"
		      android:orientation="vertical">
		<com.package.WrappingSlidingDrawer android:layout_width="fill_parent"
						   android:layout_height="wrap_content"
						   android:content="@+id/content"
						   android:handle="@+id/handle">
			... handle and content views ...
		</com.package.WrappingSlidingDrawer>
	</LinearLayout>
</FrameLayout>

Solution 2 - Android

just set to pmargin in sliding drawer in your xml

android:layout_marginTop="50dip"

Solution 3 - Android

seydhe's answer has a small issue.

The first argument to the getAttributeIntValue needs to be the full namespace, not just "android". So the code snippet should be:

final String xmlns="http://schemas.android.com/apk/res/android";
int orientation = attrs.getAttributeIntValue(xmlns, "orientation", SlidingDrawer.ORIENTATION_VERTICAL);
 mTopOffset = attrs.getAttributeIntValue(xmlns, "topOffset", 0);

I was having trouble getting this to work with a horizontal sliding drawer until I realized that it was not finding the orientation attribute and was therefore treating it as vertical.

Solution 4 - Android

it is better to read the parameter without hardcoding the string:

	int attrOrientation = android.R.attr.orientation;
	int attrTopOffset = android.R.attr.topOffset;
		
	int[] attrIds = new int [] {attrOrientation, attrTopOffset}; 
		
    TypedArray a = context.obtainStyledAttributes(attrs, attrIds);
    int orientation = a.getInt(0, SlidingDrawer.ORIENTATION_VERTICAL);
    topOffset = a.getDimension(1, 0);
    a.recycle(); 
		
    isVertical = (orientation == SlidingDrawer.ORIENTATION_VERTICAL);

Another issus is in the onMeasure.

I used the following code:

	if (isVertical) {
		int height = heightSpecSize - handle.getMeasuredHeight() - topOffset;
		getContent().measure(MeasureSpec.makeMeasureSpec(widthSpecSize, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
		heightSpecSize = handle.getMeasuredHeight() + topOffset + content.getMeasuredHeight();
		widthSpecSize = content.getMeasuredWidth();
		if (handle.getMeasuredWidth() > widthSpecSize) widthSpecSize = handle.getMeasuredWidth();
	} else {
		int width = widthSpecSize - handle.getMeasuredWidth() - topOffset;
		getContent().measure(MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(heightSpecSize, MeasureSpec.UNSPECIFIED));
		widthSpecSize = handle.getMeasuredWidth() + topOffset + content.getMeasuredWidth();
		heightSpecSize = content.getMeasuredHeight();
		if (handle.getMeasuredHeight() > heightSpecSize) heightSpecSize = handle.getMeasuredHeight();
	}

Solution 5 - Android

unfortunately you can't set the height, but rather the opposite of that. the topOffset attribute will determine how tall to make the sliding drawer, but its what to shave off rather than how tall it will be.

Solution 6 - Android

It works for me:

private SlidingDrawer rightSlidingPanel = null;

 @Override 
public void onCreate( Bundle savedInstanceState )
{
...
    rightSlidingPanel = (SlidingDrawer) findViewById( R.id.rightSlidingPanel );
	rightSlidingPanel.post( new Runnable() 
			{
				@Override
				public void run()
				{
					rightSlidingPanel.getLayoutParams().width = findViewById( R.id.sliding_content2 ).getMeasuredWidth() + findViewById( R.id.sliding_handle ).getMeasuredWidth();
				}

			});
}

XML Layout:

...
    <SlidingDrawer
            android:id="@+id/rightSlidingPanel"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_alignParentRight="true"
            android:layout_alignParentTop="true"
            android:allowSingleTap="true"
            android:animateOnClick="true"
            android:content="@+id/sliding_content"
            android:handle="@+id/sliding_handle"
            android:orientation="horizontal" >

            <Button
                android:id="@+id/sliding_handle"
                style="@style/toolbar_button"
                android:layout_width="30dp"
                android:layout_height="wrap_content"
                android:height="40dp"
                android:text="&lt;"
                android:width="25dp" />

            <LinearLayout
                android:id="@+id/sliding_content"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:gravity="top"
                android:orientation="vertical" >

                <LinearLayout
                    android:id="@+id/sliding_content2"
                    android:layout_width="wrap_content"
                    android:layout_height="match_parent"
                    android:layout_gravity="center_vertical"
                    android:layout_weight="1"
                    android:gravity="center_horizontal" >

...
                </LinearLayout>
            </LinearLayout>
        </SlidingDrawer>
...

Content Type	Original Author	Original Content on Stackoverflow
Question	Mark Whitaker	View Question on Stackoverflow
Solution 1 - Android	seydhe	View Answer on Stackoverflow
Solution 2 - Android	A B	View Answer on Stackoverflow
Solution 3 - Android	museofwater	View Answer on Stackoverflow
Solution 4 - Android	kingston	View Answer on Stackoverflow
Solution 5 - Android	Nathan Schwermann	View Answer on Stackoverflow
Solution 6 - Android	Alex K	View Answer on Stackoverflow