Android 游戲開發（一）界面設計

-------------------------布局
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <ImageView
        android:id="@+id/mainMenuBackground"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:adjustViewBounds="true"
        android:gravity="center_vertical"
        android:scaleType="fitXY"
        android:src="@drawable/title_background" />

    <ImageView
        android:id="@+id/mainMenuTitle"
        android:layout_width="336dp"
        android:layout_height="153dp"
        android:layout_gravity="center_horizontal"
        android:layout_marginTop="20dp"
        android:adjustViewBounds="true"
        android:src="@drawable/title" />

    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/mainSectionMenu"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:gravity="bottom"
        android:orientation="vertical" >

        <ImageView
            android:id="@+id/startButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:clickable="true"
        
            android:src="@drawable/ui_button_start" />

        <ImageView
            android:id="@+id/extrasButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:clickable="true"
            android:paddingTop="10dp"
            android:src="@drawable/ui_button_extras" />

        <ImageView
            android:id="@+id/optionButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:clickable="true"
            android:paddingTop="10dp"
          
            android:src="@drawable/ui_button_options" />

        <TextView
            android:id="@+id/ticker"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|left"
            android:background="#99000000"
            android:ellipsize="marquee"
            android:fadingEdge="horizontal"
            android:fadingEdgeLength="5dp"
            android:focusable="false"
            android:lines="1"
            android:marqueeRepeatLimit="marquee_forever"
            android:singleLine="true"
            android:text="independent pixels), sp (scaled pixels based on preferred font size), in (inches), mm (millimeters).This may also be a reference to a resource (in the form"
            android:textColor="#FFFFFF"
            android:textColorHighlight="#FFFFFF"
            android:textSize="14sp" />
    </LinearLayout>

    <ImageView
        android:id="@+id/extrasNew"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingLeft="280dp"
        android:paddingTop="160dp"
        android:src="@drawable/ui_new"
        android:visibility="invisible" />

</FrameLayout>

-----------------------------------------------------.java
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

mTicker = findViewById(R.id.ticker);
if (mTicker != null) {

mTicker.setFocusable(true);
mTicker.requestFocus();
mTicker.setSelected(true);