shape實作漸變背景 selector

1，shape漸變色

<shape xmlns:android="http://schemas.android.com/apk/res/android" >
            <!--
            android:startColor="#aa000000"  漸變起始色值
            android:centerColor=""      漸變中間色值
            android:endColor="#ffffffff"    漸變結束顔色
            android:angle="45"      漸變的方向 預設為0 從做向右 ，90時從下向上 必須為45的整數倍
            android:type="radial"       漸變類型 有三種 線性linear 放射漸變radial 掃描線性漸變sweep
            android:centerX="0.5"       漸變中心相對X坐标隻有漸變類型為放射漸變時有效
            android:centerY="0.5"       漸變中心相對Y坐标隻有漸變類型為放射漸變時有效
            android:gradientRadius="100"    漸變半徑 非線性放射有效
             -->
            <gradient
                android:startColor="#b7bbd9"
                android:endColor="#5CACEE"
                android:angle="90"
                />
        </shape>
           

2， selector 電視選中框

<selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_focused="true">
            <shape android:shape="rectangle">
                <solid android:color="@color/focus_selected" />
                <stroke android:width="@dimen/dp_1080p_4px" android:color="@color/focus_selected" />
                <corners android:radius="@dimen/dp_1080p_18px" />
            </shape>
        </item>
    
    
        <item android:state_focused="false">
            <shape android:shape="rectangle">
                <solid android:color="@color/black" />
                <stroke android:width="@dimen/dp_1080p_4px" android:color="@color/white" />
                <corners android:radius="@dimen/dp_1080p_18px" />
            </shape>
        </item>
    
    </selector>