Android 中图片和按钮按下状态变化实例代码解析

1、图片设置背景选择器，以便点按或设置选中与否，背景切换

res/drawable/selector_settings_item_back.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:state_focused="true" android:drawable="@color/settingsSelectedItem"/>
  <item android:state_pressed="true" android:drawable="@color/settingsSelectedItem"/>
  <item android:state_selected="true" android:drawable="@color/settingsSelectedItem"/>
  <item android:state_focused="false" android:drawable="@color/settingsItem"/>
</selector > 

颜色值定义：

res/values/colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <color name="settingsItem">#ffffff</color>
  <color name="settingsSelectedItem">#FFA500</color>
</resources> 

2、圆角按钮，按下抬起切换背景，同时切换文字颜色

res/layout/activity_xxx.xml

<Button
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_weight="1"
android:background="@drawable/selector_shape_corner_button"
  android:text="审批中" android:textColor="@drawable/selector_font_style_corner_button"
  android:textSize="13sp"
  /> 

其中引用了 res/drawable/ 下的两个 selector ，

一个是背景图片随点按抬起状态进行切换，一个是文本颜色随点按抬起进行切换。

res/drawable/selector_shape_corner_button.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:state_focused="true" android:drawable="@drawable/shape_corner_button_fill"/>
  <item android:state_pressed="true" android:drawable="@drawable/shape_corner_button_fill"/>
  <item android:state_selected="true" android:drawable="@drawable/shape_corner_button_fill"/>
  <item android:state_focused="false" android:drawable="@drawable/shape_corner_button"/>
</selector >
 res/drawable/selector_font_style_corner_button 

shape_corner_button.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
  android:shape="rectangle">
  <corners
    android:radius="5dp" />
  <solid
    android:color="#001da1f2" />
  <stroke
    android:width="1dp"
    android:color="#1da1f2" />
</shape> 

shape_corner_button_fill.xml

<?xml version="1.0" encoding="utf-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
  android:shape="rectangle">
  <corners
    android:radius="5dp" />
  <solid
    android:color="#ff1da1f2" />
  <stroke
    android:width="1dp"
    android:color="#1da1f2" />
</shape>
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:state_focused="true" android:color="#ffffff"/>
  <item android:state_pressed="true" android:color="#ffffff"/>
  <item android:state_selected="true" android:color="#ffffff"/>
  <item android:state_focused="false" android:color="#1da1f2"/>
</selector > 

总结

以上所述是小编给大家介绍的Android 中图片和按钮按下状态变化实例代码解析，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对我们网站的支持！