com.facebook.react.devsupport.DoubleTapReloadRecognizer.java Source code

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Here is the source code for com.facebook.react.devsupport.DoubleTapReloadRecognizer.java

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/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

package com.facebook.react.devsupport;

import android.os.Handler;
import android.view.KeyEvent;
import android.view.View;
import android.widget.EditText;

/**
 * A class allows recognizing double key tap of "R", used to reload JS in {@link
 * AbstractReactActivity}, {@link RedBoxDialog} and {@link ReactActivity}.
 */
public class DoubleTapReloadRecognizer {
    private boolean mDoRefresh = false;
    private static final long DOUBLE_TAP_DELAY = 200;

    public boolean didDoubleTapR(int keyCode, View view) {
        if (keyCode == KeyEvent.KEYCODE_R && !(view instanceof EditText)) {
            if (mDoRefresh) {
                mDoRefresh = false;
                return true;
            } else {
                mDoRefresh = true;
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        mDoRefresh = false;
                    }
                }, DOUBLE_TAP_DELAY);
            }
        }
        return false;
    }
}