efunboxModel/app-base/src/main/java/com/edufound/base/util/ShowUpdateUrlByKey.java

package com.edufound.base.util;

import android.app.Activity;
import android.os.Handler;
import android.os.Handler.Callback;
import android.os.Message;
import android.view.KeyEvent;
import android.webkit.WebView;

import com.edufound.base.callback.UpdateUrlCallback;
import com.edufound.base.popupwindow.BasePopWindowUtil;

public final class ShowUpdateUrlByKey implements Callback {

    private static final int MSG_SHOW_EFKEY = Integer.MIN_VALUE;
    private Handler mHandlerUi = new Handler(this);
    private Handler mHandlerBackground = new Handler(this);
    private static final int[] EFKEY = {KeyEvent.KEYCODE_VOLUME_DOWN, KeyEvent.KEYCODE_VOLUME_UP,
            KeyEvent.KEYCODE_VOLUME_UP, KeyEvent.KEYCODE_VOLUME_DOWN, KeyEvent.KEYCODE_VOLUME_UP,
            KeyEvent.KEYCODE_VOLUME_UP, KeyEvent.KEYCODE_VOLUME_UP};
    private static final int EFKEY_LENGTH = EFKEY.length;
    private static final long INPUT_INTERVAL = 10 * 1000L;
    private long mLastInputTime;
    private int mIndex;
    private static Activity mContext;

    private static UpdateUrlCallback mCallBack;

    private void input(int keyCode) {
        if (System.currentTimeMillis() - mLastInputTime > INPUT_INTERVAL) {
            mIndex = 0;
        }
        if (mIndex >= EFKEY_LENGTH || mIndex < 0) {
            mIndex = 0;
        }
        if (EFKEY[mIndex] == keyCode) {
            mLastInputTime = System.currentTimeMillis();
            mIndex++;
            if (mIndex == EFKEY_LENGTH) {
                mHandlerUi.sendEmptyMessage(MSG_SHOW_EFKEY);
            }
        } else {

            mLastInputTime = System.currentTimeMillis();
            mIndex = 0;
        }
    }


    private static final ShowUpdateUrlByKey INSTANCE = new ShowUpdateUrlByKey();

    public static void dispatchKeyEvent(KeyEvent e, Activity context, UpdateUrlCallback callback) {
        try {
            mContext = context;
            mCallBack = callback;
            getInstance().dispathInput(e);
        } catch (final Exception ex) {
            ex.printStackTrace();
        }
    }

    private static ShowUpdateUrlByKey getInstance() {
        return INSTANCE;
    }

    private void dispathInput(final KeyEvent e) {
        mHandlerBackground.sendEmptyMessage(e.getKeyCode());
    }

    @Override
    public boolean handleMessage(Message msg) {
        try {
            switch (msg.what) {
                case MSG_SHOW_EFKEY:
                    BasePopWindowUtil.showUpdateUrlWindow(mContext, mCallBack);
                    break;
                default:
                    input(msg.what);
                    break;
            }
        } catch (final Exception ex) {
            ex.printStackTrace();
        }
        return true;
    }

}