我正在尝试使用 AccessibilityNodeInfo 但当我使用 event.getSource() 时它总是返回 null，我尝试读取浏览器的编辑框，这是我的代码：
public class MainActivity extends Activity {
static final String TAG = "RecorderService";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent i = new Intent(this, RecorderService.class);
startService(i);
}}
作为服务的accessibilityService代码：
public class RecorderService extends AccessibilityService {
static final String TAG = "RecorderService";
private String getEventType(AccessibilityEvent event) {
switch (event.getEventType()) {
case AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED:
return "TYPE_NOTIFICATION_STATE_CHANGED";
case AccessibilityEvent.TYPE_VIEW_CLICKED:
return "TYPE_VIEW_CLICKED";
case AccessibilityEvent.TYPE_VIEW_FOCUSED:
return "TYPE_VIEW_FOCUSED";
case AccessibilityEvent.TYPE_VIEW_LONG_CLICKED:
return "TYPE_VIEW_LONG_CLICKED";
case AccessibilityEvent.TYPE_VIEW_SELECTED:
return "TYPE_VIEW_SELECTED";
case AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED:
return "TYPE_WINDOW_STATE_CHANGED";
case AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED:
return "TYPE_VIEW_TEXT_CHANGED";
}
return "default";
}
private String getEventText(AccessibilityEvent event) {
StringBuilder sb = new StringBuilder();
for (CharSequence s : event.getText()) {
sb.append(s);
}
return sb.toString();
}
@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
AccessibilityNodeInfo source = null;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
source = event.getSource();
Log.v(TAG, "Source Accessibility node info: " + source);
}
Log.v(TAG, String.format(
"onAccessibilityEvent: [type] %s [class] %s [package] %s [time] %s [text] %s",
getEventType(event), event.getClassName(), event.getPackageName(),
event.getEventTime(), getEventText(event)));
}
@Override
public void onInterrupt() {
Log.v(TAG, "onInterrupt");
}
@Override
protected void onServiceConnected() {
super.onServiceConnected();
Log.v(TAG, "***********onServiceConnected");
AccessibilityServiceInfo info = new AccessibilityServiceInfo();
info.flags = AccessibilityServiceInfo.DEFAULT |
AccessibilityServiceInfo.FLAG_RETRIEVE_INTERACTIVE_WINDOWS |
AccessibilityServiceInfo.FLAG_REQUEST_ENHANCED_WEB_ACCESSIBILITY |
AccessibilityServiceInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS |
AccessibilityServiceInfo.FLAG_REPORT_VIEW_IDS;
info.eventTypes = AccessibilityEvent.TYPES_ALL_MASK;
info.feedbackType = AccessibilityServiceInfo.FEEDBACK_GENERIC;
setServiceInfo(info);}}
accessbibility.xml：
<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
android:accessibilityEventTypes="typeWindowStateChanged|typeViewHoverEnter|typeViewHoverExit|typeWindowContentChanged"
android:accessibilityFeedbackType="feedbackSpoken"
android:accessibilityFlags="flagDefault|flagIncludeNotImportantViews|flagRequestTouchExplorationMode|flagRequestEnhancedWebAccessibility|flagReportViewIds|flagRequestFilterKeyEvents"
android:canRetrieveWindowContent="true"
android:canRequestTouchExplorationMode="true"
android:canRequestFilterKeyEvents="true"
android:canRequestEnhancedWebAccessibility="true"
android:settingsActivity="com.recorderservice"
/>
