Continuously delete contents of EditText on button hold Android [duplicate]

问题

How do I delete one by one the current text of edit text when I press a button and continuously delete the text one by one when I hold the press of button. Similar to what a backspace button does.

Sending a backspace event won't work on my needs because it will only work if the keyboard is active. Im not using any keyboards.

回答1:

You have to use the Timer for this.It continuously checks the button state pressed or not. Like:

private Timer _timer;

final Button _button = (Button) findViewById(R.id.button1);
final EditText _editText = (EditText) findViewById(R.id.editText1);
_timer = new Timer();
TimerTask _task = new TimerTask() {

@Override
public void run() {
runOnUiThread(new Runnable() {

 @Override
 public void run() {
    Editable _editable = _editText.getText();
    int length = _editable.length();
    _editText.setSelection(length);
    if (_button.isPressed() && length > 0) {
        _editable.delete(length - 1, length);
        }

    }
 });
}
};
_timer.schedule(_task, 0, 60);

Just cancel the Timer in onDestroy() method, Like:

_timer.cancel();

回答2:

You can send a BACKSPACEKEY EVENT to your EditText.

Here is the sample for what you want Send backspace key event to edit text.

Edit

Manually you can do like this

Get the String from edittext.
Delete the char at last index. For this you can use method subString of String class.

Recursively do this process until your String becomes empty.

来源：https://stackoverflow.com/questions/20987540/continuously-delete-contents-of-edittext-on-button-hold-android

标签

android

android-edittext

backspace