Android Database Programming basics (FIRST STEP)

 

First, create an Android project, throw in an Activity class during creation. Compose the UI, the res/layout/main.xml might look like this

 

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

    <EditText

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:id="@+id/todoedit"

        android:layout_weight="0"

    />

    <ScrollView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_weight="10"

    >

        <TextView 

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:text="I have nothing"

            android:id="@+id/tododisplay"

        />

    </ScrollView>

    <Button

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="Add item"

        android:id="@+id/btnadd"

        android:onClick="recAdd"

        android:layout_weight="0"

/>

</LinearLayout>

The TextView component is embedded in a ScrollView component so that we can scroll through the contents of the TextView. The ScrollView acts like a viewport. We also used weight property of the layout so that our viewport is given the most screen real-estate. See the note on how to use weights to maximize screen space

The Button's onClick property is a method called recAdd which we need to define inside the Activity class.