无障碍
1、判断TalkBack开关状态
AccessibilityManager manager = (AccessibilityManager)context.getSystemService("accessibility");
if (null != manager) {return manager.isTouchExplorationEnabled();
}
isTouchExplorationEnabled() Returns if the touch exploration in the system is enabled. |
返回true，说明TalkBack是开启状态；返回false，则是关闭状态。
2、控件语音朗读
AccessibilityEvent e = AccessibilityEvent.obtain();
e.setEventType(AccessibilityEvent.TYPE_ANNOUNCEMENT);
e.setClassName(view.getClass().getName());
e.setPackageName(context.getPackageName());
e.getText().add(text);
AccessibilityManager manager = (AccessibilityManager)context.getSystemService("accessibility");
if (null != manager) {manager.sendAccessibilityEvent(e);
}
TYPE_ANNOUNCEMENT
Represents the event of an application making an announcement.
Value: 16384
3、控件内容描述，即开启TalkBack时默认的朗读文本
xml：android:contentDescription
代码：setContentDescription 和 getContentDescription