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Git 项目推荐 | Android 键盘弹出显示 Emoji 按钮

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; @Override protected 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：

@Override public 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

@Override public 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; }