我对android上的可访问性很陌生。在浏览类和文档时,我在TYPE_ACCESSIBILITY_OVERLAY
类中遇到了WindowManager
。
documentation表示(仅相关文本)
例如,如果有全屏辅助功能覆盖
可触摸,下面的窗口将由
无障碍服务,即使它们被一个可触摸的
窗户。
所以我开始实现这个目标,一个全屏的可访问性覆盖,并尝试反省它下面的窗口
扩展AccessibilityService
并在调用onServiceConnected
时添加我的全屏覆盖(添加覆盖的灵感来自here)
@Override
protected void onServiceConnected() {
WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
FrameLayout mLayout = new FrameLayout(this);
WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
lp.type = WindowManager.LayoutParams.TYPE_ACCESSIBILITY_OVERLAY;
lp.format = PixelFormat.TRANSLUCENT;
lp.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;
lp.width = WindowManager.LayoutParams.MATCH_PARENT;
lp.height = WindowManager.LayoutParams.MATCH_PARENT;
lp.gravity = Gravity.TOP;
wm.addView(mLayout, lp);
mLayout.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// Here I'm getting the touch events on the overlay I added
return false;
}
});
}
现在,问题是,我该如何反省或找到这个覆盖层下面的窗口?即使在
onAccessibilityEvent
回调中,我也只得到这个覆盖窗口。getWindows()总是有一个size of 1
。它是否反驳了上述关于TYPE_ACCESSIBILITY_OVERLAY
的断言?相关信息:要接收覆盖上的触摸事件,我已在服务设置中禁用了TouchExplorationMode
android:canRequestTouchExplorationMode="false"
最佳答案
您似乎缺少的是配置上的flagRetrieveInteractiveWindows。这些属性和窗口布局参数配置应该可以工作,而不需要您禁用canRequestTouchExplorationMode
来获取事件,并且让getWindows
返回您下面的可访问的indowinfo实例:
<?xml version="1.0" encoding="utf-8"?>
<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
android:packageNames="test.demo.com.tests"
android:accessibilityEventTypes="typeAllMask"
android:accessibilityFlags="flagRetrieveInteractiveWindows|flagReportViewIds|flagIncludeNotImportantViews"
android:accessibilityFeedbackType="feedbackAllMask"
android:notificationTimeout="100"
android:canRetrieveWindowContent="true"
/>
在连接的服务上:
@Override
protected void onServiceConnected() {
WindowManager windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
FrameLayout layout = new FrameLayout(this);
WindowManager.LayoutParams params = new WindowManager.LayoutParams(WindowManager.LayoutParams.MATCH_PARENT,
WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.TYPE_ACCESSIBILITY_OVERLAY,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE| WindowManager.LayoutParams.FLAG_FULLSCREEN |
WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE|
WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS|
WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
PixelFormat.TRANSLUCENT);
params.gravity = Gravity.TOP;
windowManager.addView(layout, params);
layout.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
//You can either get the information here or on onAccessibilityEvent
return false;
}
});
}
编辑:
添加
FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS
以完成全屏显示,删除canRequestTouchExplorationMode
,因为与此属性相关联的标志不应包括在内,因此没有任何用处。