16. Tutorial: ScrollView

Create an android project "de.vogella.android.scrollview" with the activity "ScrollView". Create the following layout and class.

   
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:fillViewport="true"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/LinearLayout01"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/TextView01"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingLeft="8dip"
            android:paddingRight="8dip"
            android:paddingTop="8dip"
            android:text="This is a header"
            android:textAppearance="?android:attr/textAppearanceLarge" >
        </TextView>

        <TextView
            android:id="@+id/TextView02"
            android:layout_width="wrap_content"
            android:layout_height="fill_parent"
            android:layout_weight="1.0"
            android:text="@+id/TextView02" >
        </TextView>

        <LinearLayout
            android:id="@+id/LinearLayout02"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" >

            <Button
                android:id="@+id/Button01"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1.0"
                android:text="Submit" >
            </Button>

            <Button
                android:id="@+id/Button02"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1.0"
                android:text="Cancel" >
            </Button>
        </LinearLayout>
    </LinearLayout>

</ScrollView>
  

   
package de.vogella.android.scrollview;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class ScrollView extends Activity {
    

/** Called when the activity is first created. */
@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        TextView view = (TextView) findViewById(R.id.TextView02);
        String s="";
        for (int i=0; i < 100; i++) {
         s += "vogella.com ";
        }
        view.setText(s);
    }
}
  

The attribute "android:fillViewport="true"" ensures that the scrollview is set to the full screen even if the elements are smaller then one screen and the "layout_weight" tell the android system that these elements should be extended.