Disable a whole activity from user action

Question

Is there a simple way to disable a user interacting with an activity. To be done when there is an action running (and a spinning progress bar in the title bar)

EDIT:

Answer 1

I solved this by adding an full screen blank image with a null click handler at the end on the XML layout.

Create a transparent PNG file in the drawables folder.

Add a full screen ImageView at the end of the XML layout referencing the image:

...
 <ImageView
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     app:srcCompat="@drawable/img_mask"
     android:id="@+id/imgMask"
     android:scaleType="fitXY"
 android:visibility="gone"
     android:onClick="doNothingClick"
 />

Add the null click hander for the image to capture user touches:

public void doNothingClick(View v){
    // do nothing with the click
}

Add the code to disable the user touches:

private void StopTouches(int duration){
    findViewById(R.id.imgMask).setVisibility(View.VISIBLE);
    Handler handler = new Handler();
    handler.postDelayed(new Runnable() {
        @Override
        public void run() {
            findViewById(R.id.imgMask).setVisibility(View.GONE);
        }
    }, duration);
}

Answer 2

In order to block user touch events, use:

getWindow().setFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE,
WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE);

To get touch events back, use:

getWindow().clearFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE);

EDIT: If you want to add a feature of disable and greyed out display, you need to add in your xml layout file a linear layout that fills the parent. Set its background to #B0000000 and its visibilty to Gone. Than programicly set its visibility to Visible.

Answer 3

If you need to disable event processing for a period of time (for instance, while you run an animation, show a waiting dialog), you can override the activity's dispatch functions.

To disable touch/clicks on any buttons, add these members/functions to your activity:

protected boolean enabled = true;

public void enable(boolean b) {
    enabled = b;
}

@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
    return enabled ? 
        super.dispatchTouchEvent(ev) : 
        true;        
}

Then just call enable(true/false) when you need to disable and enable the activity's normal event handling.

Answer 4

I have solved this using a custom method - which I did not want to do:

public static void setViewGroupEnabled(ViewGroup view, boolean enabled)
    {
        int childern = view.getChildCount();

        for (int i = 0; i< childern ; i++)
        {
            View child = view.getChildAt(i);
            if (child instanceof ViewGroup)
            {
                setViewGroupEnabled((ViewGroup) child, enabled);
            }
            child.setEnabled(enabled);
        }
        view.setEnabled(enabled);
    }

If anyone finds a better way I'd like to hear about it! Thanks.

Answer 5

Use AsyncTask with ProgressDialog bundled.

1. AsyncTask

2. Progress Dialog

another useful example:

http://www.screaming-penguin.com/node/7746

Answer 6

The code of Uriel Frankel (accepted response), works good, but in my case works after my request it's done :(. I want to block before it happend. Some one knows what is wrong in my code (I'm beginning in this..)

(this is a fragment)

   login_login_btn.setOnClickListener {

    if (validateInputs()){
        showSpinner()
        thread {
            doLogin()
        }
    } else {
        validationError("Validation Error","Checkout your inputs. Common errors: \npassword (at least 8 characters)")
    }

}

}

Function after OnViewCreated

fun showSpinner(){
    activity?.window?.setFlags(
        WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE,
        WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE)
    spinner.visibility = View.VISIBLE
}

Thank you (Y)