佈局檔案。外層用RelativeLayout 最後使用一張圖片 並且android:keepScreenOn="true"

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


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/mycouponlisttoplayout"
        android:background="@color/loginbgcolor"
        android:orientation="vertical" >

        <LinearLayout
            android:id="@+id/loadingmycouponLayout"
            android:layout_width="fill_parent"
            android:layout_height="30dp"
            android:background="@color/loginbgcolor"
            android:gravity="center"
            android:orientation="horizontal" >

            <ImageView
                android:id="@+id/mycouponfootprogress"
                style="?android:progressBarStyleSmallInverse"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center_vertical"
                android:background="@drawable/spinner_small"
                android:contentDescription="@string/contentdesption"
                android:indeterminateBehavior="repeat" />

            <TextView
                android:id="@+id/mycouponTipMsg"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:gravity="left|center"
                android:padding="3.0px"
                android:text="@string/Loading"
                android:textColor="#ff000000" />
        </LinearLayout>

        <com.ejoy.customcontrol.XListView
            android:id="@+id/mycouponusalist"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@color/loginbgcolor"
            android:cacheColorHint="#00000000"
            android:scrollbars="none" >
        </com.ejoy.customcontrol.XListView>
    </LinearLayout>

    <RelativeLayout
        android:id="@+id/mycouponlisttoplayout"
        android:layout_width="match_parent"
        android:layout_height="48dp"
        android:background="@color/black" >

        <TextView
            android:id="@+id/txtMyCouponTitle"
            style="@style/TopBarTextStyle"
            android:text="@string/mycentermyCoupon" />

        <Button
            android:id="@+id/mycoupondetails_normal_Btnreturn"
            style="@style/TopBtnReturnStyle"
            android:layout_alignParentLeft="true"
            android:layout_centerVertical="true" />
    </RelativeLayout>

    <ImageView
        android:id="@+id/mycouponhelpTip"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_alignParentBottom="true"
        android:contentDescription="@string/contentdesption"
        android:keepScreenOn="true"
        android:scaleType="fitXY"
        android:src="@drawable/mycoupontip" />

</RelativeLayout>
 

helpImageView = (ImageView) findViewById(R.id.mycouponhelpTip);
		SharedPreferences sharedata = getSharedPreferences("fristrun", 0);
		Boolean isSoupon = sharedata.getBoolean("isSoupon", true);
		if (isSoupon) {
			helpImageView.setVisibility(View.VISIBLE);
		} else {
			helpImageView.setVisibility(View.GONE);
		}
		helpImageView.setOnClickListener(new View.OnClickListener() {
			public void onClick(View v) {
				helpImageView.setVisibility(View.GONE);
				Editor sharedata = getSharedPreferences("fristrun", 0).edit();
				sharedata.putBoolean("isSoupon", false);
				sharedata.commit();
			}
		});