How to disable copy/paste from/to EditText

Question

In my application, there is a registration screen, where i do not want the user to be able to copy/paste text into the EditText field. I have set an onLon

Answer 1

Who is looking for a solution in Kotlin use the below class as a custom widget and use it in the xml.

class SecureEditText : TextInputEditText {

/** This is a replacement method for the base TextView class' method of the same name. This method
 * is used in hidden class android.widget.Editor to determine whether the PASTE/REPLACE popup
 * appears when triggered from the text insertion handle. Returning false forces this window
 * to never appear.
 * @return false
 */
override fun isSuggestionsEnabled(): Boolean {
    return false
}

override fun getSelectionStart(): Int {
    for (element in Thread.currentThread().stackTrace) {
        if (element.methodName == "canPaste") {
            return -1
        }
    }
    return super.getSelectionStart()
}

public override fun onSelectionChanged(start: Int, end: Int) {

    val text = text
    if (text != null) {
        if (start != text.length || end != text.length) {
            setSelection(text.length, text.length)
            return
        }
    }

    super.onSelectionChanged(start, end)
}

companion object {
    private val EDITTEXT_ATTRIBUTE_COPY_AND_PASTE = "isCopyPasteDisabled"
    private val PACKAGE_NAME = "http://schemas.android.com/apk/res-auto"
}

constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {
    disableCopyAndPaste(context, attrs)
}

/**
 * Disable Copy and Paste functionality on EditText
 *
 * @param context Context object
 * @param attrs   AttributeSet Object
 */
private fun disableCopyAndPaste(context: Context, attrs: AttributeSet) {
    val isDisableCopyAndPaste = attrs.getAttributeBooleanValue(
        PACKAGE_NAME,
        EDITTEXT_ATTRIBUTE_COPY_AND_PASTE, true
    )
    if (isDisableCopyAndPaste && !isInEditMode()) {
        val inputMethodManager =
            context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
        this.setLongClickable(false)
        this.setOnTouchListener(BlockContextMenuTouchListener(inputMethodManager))
    }
}

/**
 * Perform Focus Enabling Task to the widget with the help of handler object
 * with some delay
 * @param inputMethodManager is used to show the key board
 */
private fun performHandlerAction(inputMethodManager: InputMethodManager) {
    val postDelayedIntervalTime: Long = 25
    Handler().postDelayed(Runnable {
        this@SecureEditText.setSelected(true)
        this@SecureEditText.requestFocusFromTouch()
        inputMethodManager.showSoftInput(
            this@SecureEditText,
            InputMethodManager.RESULT_SHOWN
        )
    }, postDelayedIntervalTime)
}

/**
 * Class to Block Context Menu on double Tap
 * A custom TouchListener is being implemented which will clear out the focus
 * and gain the focus for the EditText, in few milliseconds so the selection
 * will be cleared and hence the copy paste option wil not pop up.
 * the respective EditText should be set with this listener
 *
 * @param inputMethodManager is used to show the key board
 */
private inner class BlockContextMenuTouchListener internal constructor(private val inputMethodManager: InputMethodManager) :
    View.OnTouchListener {
    private var lastTapTime: Long = 0
    val TIME_INTERVAL_BETWEEN_DOUBLE_TAP = 30
    override fun onTouch(v: View, event: MotionEvent): Boolean {
        if (event.getAction() === MotionEvent.ACTION_DOWN) {
            val currentTapTime = System.currentTimeMillis()
            if (lastTapTime != 0L && currentTapTime - lastTapTime < TIME_INTERVAL_BETWEEN_DOUBLE_TAP) {
                this@SecureEditText.setSelected(false)
                performHandlerAction(inputMethodManager)
                return true
            } else {
                if (lastTapTime == 0L) {
                    lastTapTime = currentTapTime
                } else {
                    lastTapTime = 0
                }
                performHandlerAction(inputMethodManager)
                return true
            }
        } else if (event.getAction() === MotionEvent.ACTION_MOVE) {
            this@SecureEditText.setSelected(false)
            performHandlerAction(inputMethodManager)
        }
        return false
    }
}

}