Android 表情面板和软键盘切换时跳闪问题的解决方法

/**
 * 作者： chenZY
 * 时间： 2017/8/26 18:12
 * 描述：
 */
public class EmojiKeyboard {
 private Activity activity;
 //文本输入框
 private EditText editText;
 //表情面板
 private View emojiPanelView;
 //内容View,即除了表情布局和输入框布局以外的布局
 //用于固定输入框一行的高度以防止跳闪
 private View contentView;
 private InputMethodManager inputMethodManager;
 private SharedPreferences sharedPreferences;
 private static final String EMOJI_KEYBOARD = "EmojiKeyboard";
 private static final String KEY_SOFT_KEYBOARD_HEIGHT = "SoftKeyboardHeight";
 private static final int SOFT_KEYBOARD_HEIGHT_DEFAULT = 654;
 private Handler handler;
 public EmojiKeyboard(Activity activity, EditText editText, View emojiPanelView, View emojiPanelSwitchView, View contentView) {
  init(activity, editText, emojiPanelView, emojiPanelSwitchView, contentView);
 }
 private void init(Activity activity, EditText editText, View emojiPanelView, View emojiPanelSwitchView, View contentView) {
  this.activity = activity;
  this.editText = editText;
  this.emojiPanelView = emojiPanelView;
  this.contentView = contentView;
  this.editText.setOnTouchListener(new View.OnTouchListener() {
   @Override
   public boolean onTouch(final View v, MotionEvent event) {
    if (event.getAction() == MotionEvent.ACTION_UP && EmojiKeyboard.this.emojiPanelView.isShown()) {
     lockContentViewHeight();
     hideEmojiPanel(true);
     unlockContentViewHeight();
    }
    return false;
   }
  });
  this.contentView.setOnTouchListener(new View.OnTouchListener() {
   @Override
   public boolean onTouch(View view, MotionEvent motionEvent) {
    if (motionEvent.getAction() == MotionEvent.ACTION_UP) {
     if (EmojiKeyboard.this.emojiPanelView.isShown()) {
      hideEmojiPanel(false);
     } else if (isSoftKeyboardShown()) {
      hideSoftKeyboard();
     }
    }
    return false;
   }
  });
  //用于弹出表情面板的View
  emojiPanelSwitchView.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    if (EmojiKeyboard.this.emojiPanelView.isShown()) {
     lockContentViewHeight();
     hideEmojiPanel(true);
     unlockContentViewHeight();
    } else {
     if (isSoftKeyboardShown()) {
      lockContentViewHeight();
      showEmojiPanel();
      unlockContentViewHeight();
     } else {
      showEmojiPanel();
     }
    }
   }
  });
  this.inputMethodManager = (InputMethodManager) this.activity.getSystemService(Context.INPUT_METHOD_SERVICE);
  this.sharedPreferences = this.activity.getSharedPreferences(EMOJI_KEYBOARD, Context.MODE_PRIVATE);
  this.activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN | WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
  this.handler = new Handler();
  init();
 }
 /**
  * 如果之前没有保存过键盘高度值
  * 则在进入Activity时自动打开键盘，并把高度值保存下来
  */
 private void init() {
  if (!sharedPreferences.contains(KEY_SOFT_KEYBOARD_HEIGHT)) {
   handler.postDelayed(new Runnable() {
    @Override
    public void run() {
     showSoftKeyboard(true);
    }
   }, 200);
  }
 }
 /**
  * 当点击返回键时需要先隐藏表情面板
  */
 public boolean interceptBackPress() {
  if (emojiPanelView.isShown()) {
   hideEmojiPanel(false);
   return true;
  }
  return false;
 }
 /**
  * 锁定内容View以防止跳闪
  */
 private void lockContentViewHeight() {
  LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) contentView.getLayoutParams();
  layoutParams.height = contentView.getHeight();
  layoutParams.weight = 0;
 }
 /**
  * 释放锁定的内容View
  */
 private void unlockContentViewHeight() {
  handler.postDelayed(new Runnable() {
   @Override
   public void run() {
    ((LinearLayout.LayoutParams) contentView.getLayoutParams()).weight = 1;
   }
  }, 200);
 }
 /**
  * 获取键盘的高度
  */
 private int getSoftKeyboardHeight() {
  Rect rect = new Rect();
  activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);
  //屏幕当前可见高度，不包括状态栏
  int displayHeight = rect.bottom - rect.top;
  //屏幕可用高度
  int availableHeight = ScreenUtils.getAvailableScreenHeight(activity);
  //用于计算键盘高度
  int softInputHeight = availableHeight - displayHeight - ScreenUtils.getStatusBarHeight(activity);
  Log.e("TAG-di", displayHeight + "");
  Log.e("TAG-av", availableHeight + "");
  Log.e("TAG-so", softInputHeight + "");
  if (softInputHeight != 0) {
   // 因为考虑到用户可能会主动调整键盘高度，所以只能是每次获取到键盘高度时都将其存储起来
   sharedPreferences.edit().putInt(KEY_SOFT_KEYBOARD_HEIGHT, softInputHeight).apply();
  }
  return softInputHeight;
 }
 /**
  * 获取本地存储的键盘高度值或者是返回默认值
  */
 private int getSoftKeyboardHeightLocalValue() {
  return sharedPreferences.getInt(KEY_SOFT_KEYBOARD_HEIGHT, SOFT_KEYBOARD_HEIGHT_DEFAULT);
 }
 /**
  * 判断是否显示了键盘
  */
 private boolean isSoftKeyboardShown() {
  return getSoftKeyboardHeight() != 0;
 }
 /**
  * 令编辑框获取焦点并显示键盘
  */
 private void showSoftKeyboard(boolean saveSoftKeyboardHeight) {
  editText.requestFocus();
  inputMethodManager.showSoftInput(editText, 0);
  if (saveSoftKeyboardHeight) {
   handler.postDelayed(new Runnable() {
    @Override
    public void run() {
     getSoftKeyboardHeight();
    }
   }, 200);
  }
 }
 /**
  * 隐藏键盘
  */
 private void hideSoftKeyboard() {
  inputMethodManager.hideSoftInputFromWindow(editText.getWindowToken(), 0);
 }
 /**
  * 显示表情面板
  */
 private void showEmojiPanel() {
  int softKeyboardHeight = getSoftKeyboardHeight();
  if (softKeyboardHeight == 0) {
   softKeyboardHeight = getSoftKeyboardHeightLocalValue();
  } else {
   hideSoftKeyboard();
  }
  emojiPanelView.getLayoutParams().height = softKeyboardHeight;
  emojiPanelView.setVisibility(View.VISIBLE);
  if (emojiPanelVisibilityChangeListener != null) {
   emojiPanelVisibilityChangeListener.onShowEmojiPanel();
  }
 }
 /**
  * 隐藏表情面板，同时指定是否随后开启键盘
  */
 private void hideEmojiPanel(boolean showSoftKeyboard) {
  if (emojiPanelView.isShown()) {
   emojiPanelView.setVisibility(View.GONE);
   if (showSoftKeyboard) {
    showSoftKeyboard(false);
   }
   if (emojiPanelVisibilityChangeListener != null) {
    emojiPanelVisibilityChangeListener.onHideEmojiPanel();
   }
  }
 }
 public interface OnEmojiPanelVisibilityChangeListener {
  void onShowEmojiPanel();
  void onHideEmojiPanel();
 }
 private OnEmojiPanelVisibilityChangeListener emojiPanelVisibilityChangeListener;
 public void setEmoticonPanelVisibilityChangeListener(OnEmojiPanelVisibilityChangeListener emojiPanelVisibilityChangeListener) {
  this.emojiPanelVisibilityChangeListener = emojiPanelVisibilityChangeListener;
 }
}