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a minimalist example of Android accessibility service
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$ adb logcat -s RecorderService | |
--------- beginning of /dev/log/system | |
--------- beginning of /dev/log/main | |
V/RecorderService( 1841): onServiceConnected | |
... | |
V/RecorderService( 1841): onAccessibilityEvent: [type] TYPE_VIEW_CLICKED [class] android.widget.Button [package] com.example [time] 7710428 [text] Activity1 | |
V/RecorderService( 1841): onAccessibilityEvent: [type] TYPE_VIEW_FOCUSED [class] android.widget.EditText [package] com.example [time] 7710521 [text] | |
V/RecorderService( 1841): onAccessibilityEvent: [type] TYPE_WINDOW_STATE_CHANGED [class] com.example.Activity1 [package] com.example [time] 7710536 [text] TestRecord | |
V/RecorderService( 1841): onAccessibilityEvent: [type] TYPE_VIEW_FOCUSED [class] android.widget.EditText [package] com.example [time] 7710539 [text] | |
V/RecorderService( 1841): onAccessibilityEvent: [type] TYPE_VIEW_CLICKED [class] android.widget.EditText [package] com.example [time] 7725471 [text] | |
V/RecorderService( 1841): onAccessibilityEvent: [type] TYPE_VIEW_TEXT_CHANGED [class] android.widget.EditText [package] com.example [time] 7728589 [text] f | |
V/RecorderService( 1841): onAccessibilityEvent: [type] TYPE_VIEW_TEXT_CHANGED [class] android.widget.EditText [package] com.example [time] 7728804 [text] fg | |
V/RecorderService( 1841): onAccessibilityEvent: [type] TYPE_VIEW_TEXT_CHANGED [class] android.widget.EditText [package] com.example [time] 7728994 [text] fgj | |
... |
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import android.accessibilityservice.AccessibilityService; | |
import android.accessibilityservice.AccessibilityServiceInfo; | |
import android.util.Log; | |
import android.view.accessibility.AccessibilityEvent; | |
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) { | |
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; | |
info.eventTypes = AccessibilityEvent.TYPES_ALL_MASK; | |
info.feedbackType = AccessibilityServiceInfo.FEEDBACK_GENERIC; | |
setServiceInfo(info); | |
} | |
} |
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