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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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