Demonstrates MyGridView a custom GridView that can be placed inside a Scrollview. Used in ResolutionTweet android app.

main.xml

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

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

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="200dp"
            android:background="@android:color/darker_gray"
           android:gravity="center"
            android:text="@string/hello_world" />

        <com.webileapps.hellogridview.MyGridView
            android:id="@+id/grid"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:numColumns="7" />
    </LinearLayout>

</ScrollView>

MainActivity.java

public class MainActivity extends Activity {

  @Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		GridView gridView = (GridView) findViewById(R.id.grid);
		gridView.setAdapter(new MyArrayAdapter());
	}

	private class MyArrayAdapter extends ArrayAdapter<String> {
		MyArrayAdapter() {
			super(MainActivity.this, android.R.layout.simple_list_item_1, android.R.id.text1);
		}
		
		@Override
		public int getCount() {
			return 20;
		}
		
		@Override
		public String getItem(int position) {
			return "Cell "+position;
		}
	}
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}

MyGridView.java

package com.webileapps.hellogridview;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.GridView;

public class MyGridView extends GridView {
 
  public MyGridView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}
 
	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
		measureChildren(widthMeasureSpec, heightMeasureSpec);
		if(getChildCount() == 0) {
		  super.onMeasure(widthMeasureSpec, heightMeasureSpec);
		  return;
		}
		else {
			//I know my adapter has 7 columns. getNumColumns() works from API level 11.
			int heightOfContent = ((int) Math.ceil(getAdapter().getCount()/7.0)) * getChildAt(0).getMeasuredHeight();
			setMeasuredDimension(getMeasuredWidth(), Math.max(getMeasuredHeight(), heightOfContent));
		}
	}
}