之前写在CSDN上的文章，现在搬过来。
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;
@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;
}
代码
代码已上传到github上，地址：https://github.com/xiaolifan/EmojiLayout
