CODEWITHSUNDEEP
androidaccessibilityservice
Rahul Chowdhury
Rahul Chowdhury

Reputation: 1110

AccessibilityNodeInfo.performAction() Method not working sometimes

I am using an AccessibilityService in my app to paste some text in the EditText of another app.

I am using the following code to achieve the same,

Bundle bundle = new Bundle();

bundle.putInt(AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT,
            AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD);
bundle.putBoolean(AccessibilityNodeInfo.ACTION_ARGUMENT_EXTEND_SELECTION_BOOLEAN,
            true);

eventSource.performAction(AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY,
            bundle);

ClipboardManager clipboard = (ClipboardManager) context.getSystemService(Context.CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("text", stringToCopy);
clipboard.setPrimaryClip(clip);

eventSource.performAction(AccessibilityNodeInfo.ACTION_PASTE);

This works fine for normal cases. However, when I open up an AlertDialog from the AccessibilityService using 

WindowManager.LayoutParams.TYPE_SYSTEM_ALERT

and execute the above code on dialog button press, it behaves abnormally.

Case 1: Works fine and text gets pasted from dialog

Case 2: Text gets pasted but selection is not made and therefore the previous word remains in the field

Case 3: Nothing happens, just the dialog dismisses.

However, in all cases the text is getting copied to Clipboard and can be pasted manually.

Any clues?

Upvotes: 3

Views: 2121

Answers (1)

Rahul Chowdhury
Rahul Chowdhury

Reputation: 1110

I finally got it to work, and this is how,

Initially I was calling, Dialog.dismiss() and AccessibilityNodeInfo.performAction() at the same time, which was causing a conflict as the Window was holding the view of the Dialog as the current active view and thus was not able to link to the AccessibilityNode.

I modified my code to this, 

mDialog.dismiss();

new Handler().postDelayed(() -> {
     Bundle bundle = new Bundle();

     bundle.putInt(AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT,
            AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD);
     bundle.putBoolean(AccessibilityNodeInfo.ACTION_ARGUMENT_EXTEND_SELECTION_BOOLEAN,
            true);

     eventSource.performAction(AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY,
            bundle);

     ClipboardManager clipboard = (ClipboardManager) context.getSystemService(Context.CLIPBOARD_SERVICE);
     ClipData clip = ClipData.newPlainText("text", stringToCopy);
     clipboard.setPrimaryClip(clip);

     eventSource.performAction(AccessibilityNodeInfo.ACTION_PASTE);
}, 300);

Now it works every time properly, after providing a delay in calling the performAction() and give enough time for the Dialog to dismiss completely.

Upvotes: 4

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