/*

 * @Project: GZJK

 * @Author: cmcc

 * @Date: 2015年5月6日

 * @Copyright: 2000-2015 CMCC . All rights reserved.

 */

package com.matrix.appsdk.widget.keyboard;

import android.app.Activity;

import android.content.Context;

import android.util.AttributeSet;

import android.view.Display;

import android.widget.RelativeLayout;

/**

* @ClassName: InputMethodRelativeLayout

* @Description: 监听键盘的现实和隐藏，Activity设置为adjustResize，非全屏

* @author

* @date 2015年5月6日 下午6:48:57

*/

public class InputMethodRelativeLayout extends RelativeLayout {

    private int width;

    protected OnSizeChangedListenner onSizeChangedListenner;

    private boolean sizeChanged = false; // 变化的标志

    private int height;

    private int screenHeight; // 屏幕高度

    public InputMethodRelativeLayout(Context paramContext, AttributeSet paramAttributeSet) {

        super(paramContext, paramAttributeSet);

        Display localDisplay = ((Activity)paramContext).getWindowManager().getDefaultDisplay();

        this.screenHeight = localDisplay.getHeight();

    }

    public InputMethodRelativeLayout(Context paramContext, AttributeSet paramAttributeSet, int paramInt) {

        super(paramContext, paramAttributeSet, paramInt);

    }

    @Override

    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        this.width = widthMeasureSpec;

        this.height = heightMeasureSpec;

        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

    }

    @Override

    public void onSizeChanged(int w, int h, int oldw, int oldh) {

        // 监听不为空、宽度不变、当前高度与历史高度不为0

        if ((this.onSizeChangedListenner != null) && (w == oldw) && (oldw != 0) && (oldh != 0)) {

            if ((h >= oldh) || (Math.abs(h - oldh) <= 1 * this.screenHeight / 4)) {

                if ((h <= oldh) || (Math.abs(h - oldh) <= 1 * this.screenHeight / 4))

                    return;

                this.sizeChanged = false;

            } else {

                this.sizeChanged = true;

            }

            this.onSizeChangedListenner.onSizeChange(this.sizeChanged, oldh, h);

            measure(this.width - w + getWidth(), this.height - h + getHeight());

        }

    }

    /**

     * 设置监听事件

     * @param paramonSizeChangedListenner

     */

    public void setOnSizeChangedListenner(InputMethodRelativeLayout.OnSizeChangedListenner paramonSizeChangedListenner) {

        this.onSizeChangedListenner = paramonSizeChangedListenner;

    }

    /**

     * 大小改变的内部接口

     * @author junjun

     *

     */

    public  interface OnSizeChangedListenner {

        void onSizeChange(boolean showKeyboard, int oldH, int newH);

    }

}

package com.matrix.appsdk.widget.keyboard;

import android.app.Activity;

import android.graphics.Rect;

import android.view.View;

import android.view.ViewTreeObserver;

import android.widget.FrameLayout;

/**

 * @author BMR

 * @ClassName: AndroidBug5497Workaround

 * @Description: 解决Activity为全屏时设置为adjustResize，InputMethodRelativeLayout检测键盘不触发onSizeChanged

 * @date 2016/1/9 21:09

 */

//Workaround to get adjustResize functionality for input methos when the fullscreen mode is on

//found by Ricardo

//taken from http://stackoverflow.com/a/19494006

public class AndroidBug5497Workaround {

    // For more information, see https://code.google.com/p/android/issues/detail?id=5497

    // To use this class, simply invoke assistActivity() on an Activity that already has its content view set.

    public static void assistActivity (Activity activity) {

        new AndroidBug5497Workaround(activity);

    }

    private View mChildOfContent;

    private int usableHeightPrevious;

    private FrameLayout.LayoutParams frameLayoutParams;

    private AndroidBug5497Workaround(Activity activity) {

        FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);

        mChildOfContent = content.getChildAt(0);

        mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

            public void onGlobalLayout() {

                possiblyResizeChildOfContent();

            }

        });

        frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();

    }

    private void possiblyResizeChildOfContent() {

        int usableHeightNow = computeUsableHeight();

        if (usableHeightNow != usableHeightPrevious) {

            int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();

            int heightDifference = usableHeightSansKeyboard - usableHeightNow;

            if (heightDifference > (usableHeightSansKeyboard/4)) {

                // keyboard probably just became visible

                frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;

            } else {

                // keyboard probably just became hidden

                frameLayoutParams.height = usableHeightSansKeyboard;

            }

            mChildOfContent.requestLayout();

            usableHeightPrevious = usableHeightNow;

        }

    }

    private int computeUsableHeight() {

        Rect r = new Rect();

        mChildOfContent.getWindowVisibleDisplayFrame(r);

        return (r.bottom - r.top);

    }

}