Question

在myapp中遇到了一个非常简单的问题。我有一个自定义对话框，其中包含 EditText ，每当软键盘打开时，我想在对话框布局上显示标题/另一个布局（参见带有三个文本视图的图片）。如果他点击完成。 hidethesoftkeyboard以及标题。

        ettagmsg = (EditText) dialog.findViewById(R.id.etFlyTagName);

弹出标题

        LinearLayout layheader = (LinearLayout)findViewById(R.layout.header_buttons);

enter image description here

Answer 1

你可能想要添加这个监听器！

 ettagmsg.setOnFocusChangeListener(new View.OnFocusChangeListener(){

      @Override
      public void onFocusChange(View v, boolean hasFocus) {
          if(v.hasFocus()){
            layheader.setVisibility(View.VISIBLE);
          }else{
            layheader.setVisibility(View.GONE);
            //hide soft input here
          }
      }
}

希望我有用！

Answer 2

还没有真正测试过这个，但这里有一个很好用的代码片段：http://felhr85.net/2014/05/04/catch-soft-keyboard-showhidden-events-in-android/

tl; dr：因为弹出软键盘需要一些视图变平（高度变小），你可以用它来检查软键盘是否被隐藏/显示。

Answer 3

在Android上，键盘非常烦人。你可以随意使用我之前完成的这门课程：

使用Listener（您的对话框）实例化它，并在onStart / onStop或类似的回调期间将其从视图中附加和分离。请记住，您要将其附加到对话视图。

另外，您可能需要调整DP_KEYBOARD_THRESHOLD值

public class KeyboardObserver implements ViewTreeObserver.OnGlobalLayoutListener, ViewTreeObserver.OnPreDrawListener {

   private static final int DP_KEYBOARD_THRESHOLD = 60;
   private int keyboardThreshold;

   private int currentHeight;
   private View view;
   private final KeyboardListener listener;
   private boolean isKeyboardShown = false;

   public KeyboardObserver(KeyboardListener listener) {
      this.listener = listener;
   }

   public void attachToView(View view) {

      keyboardThreshold = (int) TypedValue.applyDimension(
         TypedValue.COMPLEX_UNIT_DIP, DP_KEYBOARD_THRESHOLD, view.getResources().getDisplayMetrics());

      this.view = view;
      currentHeight = view.getHeight();
      view.getViewTreeObserver().addOnGlobalLayoutListener(this);

      if (currentHeight <= 0) {
         view.getViewTreeObserver().addOnPreDrawListener(this);
      }

   }

   public void detachFromView() {
      if (view != null) view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
   }

   @Override
   public void onGlobalLayout() {
      int newHeight = view.getHeight();
      if (currentHeight > 0) {
         int diff = newHeight - currentHeight;
         if (diff < -keyboardThreshold) {
            Log.d(this, "onGlobalLayout. keyboard is show. height diff = " + -diff);
            // keyboard is show
            isKeyboardShown = true;
            if (listener != null)
               listener.onKeyboardShow(-diff);
         } else if (diff > keyboardThreshold) {
            Log.d(this, "onGlobalLayout.keyboard is hide.  height diff = " + diff);
            // keyboard is hide
            isKeyboardShown = false;
            if (listener != null)
               listener.onKeyboardHide(diff);
         } else {
            Log.v(this, "onGlobalLayout. height diff = " + diff);
         }
      }
      currentHeight = newHeight;
   }

   public boolean isKeyboardShown() {
      return isKeyboardShown;
   }

   @Override
   public boolean onPreDraw() {
      currentHeight = view.getHeight();
      view.getViewTreeObserver().removeOnPreDrawListener(this);
      return true;
   }

   public interface KeyboardListener {
      public void onKeyboardShow(int height);

      public void onKeyboardHide(int height);
   }
}

每当在edittext中显示键盘时弹出标题视图/布局

3 个答案: