开源软件名称：

EmojiLayout

开源软件地址：

https://gitee.com/laomengzhu/EmojiLayout

开源软件介绍：

#效果预览

效果预览

#说明

本项目中使用了https://github.com/rockerhieu/emojicon作为Emoji显示和编辑控件

#原理

通过布局高度变化监控键盘弹出，键盘弹出时显示Emoji按钮，键盘收起时隐藏Emoji按钮；

#实现

##使键盘弹出时，布局高度变化，显示或者隐藏Emoji按钮

参照这篇博客：http://blog.csdn.net/bear_huangzhen/article/details/45896333

要想让键盘弹出时，布局高度发生变化，就得将Activity的android:windowSoftInputMode属性设置为adjustResize，这样键盘弹出时总是调整屏幕的大小以便留出软键盘的空间，这样布局高度就会发生变化。

<activity    android:name=".MainActivity"    android:screenOrientation="portrait"    android:windowSoftInputMode="stateAlwaysHidden|adjustResize">    <intent-filter>        <action android:name="android.intent.action.MAIN" />        <category android:name="android.intent.category.LAUNCHER" />    </intent-filter></activity>

##监控布局高度变化

参照这篇博客：http://blog.csdn.net/bear_huangzhen/article/details/45896333

Activity或者Fragment实现View.OnLayoutChangeListener接口，给根布局设置布局变化监听器：

private EmojiconEditText etContent;private View vEmojiContainer, vEmojiBar;private ImageView ivEmojiSwitch;/** * 键盘高度 */private int softKeyboardHeight = 0;/** * emoji视图是否显示 */private boolean emojiContainerShown = false;/** * 软键盘关闭时是否显示emoji视图 */private boolean showEmojiView = false;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    View contentView = View.inflate(this, R.layout.activity_main, null);    setContentView(contentView);    //给根部局设置布局变化监听器    contentView.addOnLayoutChangeListener(this);    etContent = (EmojiconEditText) findViewById(R.id.et_content);    vEmojiBar = findViewById(R.id.ll_emoji_bar);    vEmojiContainer = findViewById(R.id.fl_emoji_container);    ivEmojiSwitch = (ImageView) findViewById(R.id.iv_emojicon);    ivEmojiSwitch.setOnClickListener(this);    //添加Emoji控件    getSupportFragmentManager().beginTransaction().replace(R.id.fl_emoji_container, new EmojiconsFragment()).commitAllowingStateLoss();}

键盘弹出时显示Emoji按钮，键盘收起时隐藏Emoji按钮：

@Overridepublic void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {        //现在认为只要控件将Activity向上推的高度超过了1/3屏幕高，就认为软键盘弹起        int keyHeight = getResources().getDisplayMetrics().widthPixels / 3;        if (oldBottom != 0 && bottom != 0 && (oldBottom - bottom > keyHeight)) {            //监听到软键盘弹起            if (softKeyboardHeight == 0) {                softKeyboardHeight = oldBottom - bottom;            }            //隐藏Emoji视图            hideEmojiLayout(false);            ivEmojiSwitch.setImageResource(R.drawable.ic_emoji);            vEmojiBar.setVisibility(View.VISIBLE);        } else if (oldBottom != 0 && bottom != 0 && (bottom - oldBottom > keyHeight)) {            //监听到软件盘关闭            if (showEmojiView) {                //如果是通过点击Emoji按钮使键盘隐藏的则显示Emoji视图                showEmojiView = false;                RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams)   vEmojiBar.getLayoutParams();                lp.bottomMargin = softKeyboardHeight;                vEmojiBar.setLayoutParams(lp);                lp = (RelativeLayout.LayoutParams) vEmojiContainer.getLayoutParams();                lp.height = softKeyboardHeight;                vEmojiContainer.setVisibility(View.VISIBLE);                emojiContainerShown = true;            } else {                //其他方式使键盘收起，则隐藏Emoji按钮                ivEmojiSwitch.setImageResource(R.drawable.ic_emoji);                vEmojiBar.setVisibility(View.GONE);            }        }    }

##处理Emoji按钮的点击

@Overridepublic void onClick(View v) {    switch (v.getId()) {        case R.id.iv_emojicon: {            if (emojiContainerShown) {                //如果Emoji视图已经显示，再次点击Emoji按钮时显示键盘                ivEmojiSwitch.setImageResource(R.drawable.ic_emoji);                hideEmojiLayout(false);                showSoftInput(this, etContent);            } else {                //否则显示Emoji视图                ivEmojiSwitch.setImageResource(R.drawable.ic_keyboard);                showEmojiView = true;                hideSoftInput(this, etContent);            }            break;        }    }}/** * 隐藏Emoji视图 * * @param hideEmojiBar 是否隐藏Emoji按钮 */private void hideEmojiLayout(boolean hideEmojiBar) {    RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams) vEmojiBar.getLayoutParams();    lp.bottomMargin = 0;    vEmojiBar.setLayoutParams(lp);    vEmojiContainer.setVisibility(View.GONE);    if (hideEmojiBar) {        ivEmojiSwitch.setImageResource(R.drawable.ic_emoji);        vEmojiBar.setVisibility(View.GONE);    }    emojiContainerShown = false;}