要實現以上效果:當checkbox被選中之後,checkbox的邊框被加粗(顏色改變、字體改變可容易實現,不再贅述)。暫時的解決方案是使用layer-list。
layer-list:圖層的累加,字面上是多個層,也就是你可以把多個layer放在一起,然後一其顯現出來。
tab-widget中自定義的視圖checkbox所處佈局:
[html]
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="40dp"
android:orientation="vertical">
<CheckBox
android:id="@+id/checkMsg"
style="@style/tab_checkbox"
android:layout_width="match_parent"
android:layout_height="40dp" />
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="40dp"
android:orientation="vertical">
<CheckBox
android:id="@+id/checkMsg"
style="@style/tab_checkbox"
android:layout_width="match_parent"
android:layout_height="40dp" />
</LinearLayout>
checkbox style.xml 樣式文件:
[html]
<style name="tab_checkbox">
<item name="android:background">@drawable/msg_tab_widget_sharp</item>
<item name="android:button" >@null</item>
<item name="android:textColor">@color/gray</item>
<item name="android:textSize" >16sp</item>
<item name="android:gravity" >center</item>
</style>
<style name="tab_checkbox">
<item name="android:background">@drawable/msg_tab_widget_sharp</item>
<item name="android:button" >@null</item>
<item name="android:textColor">@color/gray</item>
<item name="android:textSize" >16sp</item>
<item name="android:gravity" >center</item>
</style>
msg_tab_widget_sharp.xml checkbox style.xml 樣式文件中的background 的佈局文件:
[html]
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/msg_tab_widget1" android:state_checked="true"></item>
<item android:drawable="@drawable/msg_tab_widget2" android:state_checked="false"></item>
<item android:drawable="@drawable/msg_tab_widget2"></item>
</selector>
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/msg_tab_widget1" android:state_checked="true"></item>
<item android:drawable="@drawable/msg_tab_widget2" android:state_checked="false"></item>
<item android:drawable="@drawable/msg_tab_widget2"></item>
</selector>
msg_tab_widget1.xml 當checkbox被選中時:
[html]
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<!– This is the border color –>
<shape>
<solid android:color="#0066CC" />
</shape>
</item>
<item android:bottom="3dp" android:right="1dp">
<!– This is the main color –>
<shape>
<solid android:color="#E9F2FC" />
<padding
android:bottom="5dp"
android:left="5dp"
android:right="5dp"
android:top="5dp" />
</shape>
</item>
</layer-list>
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<!– This is the border color –>
<shape>
<solid android:color="#0066CC" />
</shape>
</item>
<item android:bottom="3dp" android:right="1dp">
<!– This is the main color –>
<shape>
<solid android:color="#E9F2FC" />
<padding
android:bottom="5dp"
android:left="5dp"
android:right="5dp"
android:top="5dp" />
</shape>
</item>
</layer-list>
msg_tab_widget2.xml 當checkbox未被選中時,即默認顯示的狀態:
[html]
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<!– This is the border color –>
<shape>
<solid android:color="#0066CC" />
</shape>
</item>
<item
android:bottom="1dp"
android:right="1dp">
<!– This is the main color –>
<shape>
<solid android:color="#E9F2FC" />
<padding
android:bottom="5dp"
android:left="5dp"
android:right="5dp"
android:top="5dp" />
</shape>
</item>
</layer-list>
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<!– This is the border color –>
<shape>
<solid android:color="#0066CC" />
</shape>
</item>
<item
android:bottom="1dp"
android:right="1dp">
<!– This is the main color –>
<shape>
<solid android:color="#E9F2FC" />
<padding
android:bottom="5dp"
android:left="5dp"
android:right="5dp"
android:top="5dp" />
</shape>
</item>
</layer-list>
其他使用demo:如在 android:style/Widget.ProgressBar.Large 或者其他的progressbar風格
[html]
<style
name="progressBarStyleSmall"
parent="android:style/Widget.ProgressBar.Large" >
<item name="android:indeterminateDrawable">@drawable/progress</item>
</style>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<!– <item android:drawable="@android:drawable/progress_circular_background" /> –>
<!–
<item>
<shape android:shape="ring" android:innerRadiusRatio="3.4" android:thicknessRatio="6.0">
<gradient android:useLevel="true" android:type="sweep" android:startColor="#ff000000" android:endColor="#ffffffff" />
</shape>
</item>
–>
<item>
<rotate
android:drawable="@drawable/load2"
android:fromDegrees="0"
android:pivotX="50%"
android:pivotY="50%"
android:toDegrees="370" />
</item>
</layer-list>
<style
name="progressBarStyleSmall"
parent="android:style/Widget.ProgressBar.Large" >
<item name="android:indeterminateDrawable">@drawable/progress</item>
</style>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<!– <item android:drawable="@android:drawable/progress_circular_background" /> –>
<!–
<item>
<shape android:shape="ring" android:innerRadiusRatio="3.4" android:thicknessRatio="6.0">
<gradient android:useLevel="true" android:type="sweep" android:startColor="#ff000000" android:endColor="#ffffffff" />
</shape>
</item>
–>
<item>
<rotate
android:drawable="@drawable/load2"
android:fromDegrees="0"
android:pivotX="50%"
android:pivotY="50%"
android:toDegrees="370" />
</item>
</layer-list>