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diff --git a/docs/html/resources/tutorials/views/hello-linearlayout.jd b/docs/html/resources/tutorials/views/hello-linearlayout.jd new file mode 100644 index 0000000..0e8947c --- /dev/null +++ b/docs/html/resources/tutorials/views/hello-linearlayout.jd @@ -0,0 +1,130 @@ +page.title=Hello, LinearLayout +parent.title=Hello, Views +parent.link=index.html +@jd:body + +<p>A {@link android.widget.LinearLayout} is a GroupView that will lay child View elements +vertically or horizontally.</p> + + +<ol> + <li>Start a new project/Activity called HelloLinearLayout.</li> + <li>Open the layout file. + Make it like so: +<pre> +<?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"> + + <LinearLayout + android:orientation="horizontal" + android:layout_width="fill_parent" + android:layout_height="fill_parent" + android:layout_weight="1"> + + <TextView + android:text="red" + android:gravity="center_horizontal" + android:background="#aa0000" + android:layout_width="wrap_content" + android:layout_height="fill_parent" + android:layout_weight="1"/> + + <TextView + android:text="green" + android:gravity="center_horizontal" + android:background="#00aa00" + android:layout_width="wrap_content" + android:layout_height="fill_parent" + android:layout_weight="1"/> + + <TextView + android:text="blue" + android:gravity="center_horizontal" + android:background="#0000aa" + android:layout_width="wrap_content" + android:layout_height="fill_parent" + android:layout_weight="1"/> + + <TextView + android:text="yellow" + android:gravity="center_horizontal" + android:background="#aaaa00" + android:layout_width="wrap_content" + android:layout_height="fill_parent" + android:layout_weight="1"/> + + </LinearLayout> + + <LinearLayout + android:orientation="vertical" + android:layout_width="fill_parent" + android:layout_height="fill_parent" + android:layout_weight="1"> + + <TextView + android:text="row one" + android:textSize="15pt" + android:layout_width="fill_parent" + android:layout_height="wrap_content" + android:layout_weight="1"/> + + <TextView + android:text="row two" + android:textSize="15pt" + android:layout_width="fill_parent" + android:layout_height="wrap_content" + android:layout_weight="1"/> + + <TextView + android:text="row three" + android:textSize="15pt" + android:layout_width="fill_parent" + android:layout_height="wrap_content" + android:layout_weight="1"/> + + <TextView + android:text="row four" + android:textSize="15pt" + android:layout_width="fill_parent" + android:layout_height="wrap_content" + android:layout_weight="1"/> + + </LinearLayout> + +</LinearLayout> +</pre> + <p>Carefully inspect the XML. You'll notice how this layout works a lot like + an HTML layout. There is one parent LinearLayout that is defined to lay + its child elements vertically. The first child is another LinearLayout that uses a horizontal layout + and the second uses a vertical layout. Each LinearLayout contains several {@link android.widget.TextView} + elements.</p> +</li> +<li>Now open the HelloLinearLayout Activity and be sure it loads this layout in the <code>onCreate()</code> method:</p> +<pre> +public void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + setContentView(R.layout.main); +} +</pre> +<p><code>R.layout.main</code> refers to the <code>main.xml</code> layout file.</p> +</li> +<li>Run it.</li> +</ol> +<p>You should see the following:</p> +<img src="images/hello-linearlayout.png" width="150px" /> + +<p>Notice how the various XML attributes define the View's behavior. +Pay attention to the effect of the <code>layout_weight</code>. Try + experimenting with different values to see how the screen real estate is + distributed based on the weight of each element.</p> + +<h3>References</h3> +<ul> + <li>{@link android.widget.LinearLayout}</li> +<li>{@link android.widget.TextView}</li> +</ul> + + |