Android软键盘状态弹出与消失的示例

最近遇到了关于软键盘的问题,需要获取到软键盘的状态,是否在显示 ,记录一下,方便以后查阅。网上常见的判定状态方法

复制代码 代码如下:

getWindow().getAttributes().softInputMode== WindowManager.LayoutParams.SOFT_INPUT_STATE_UNSPECIFIED 

来判断软键盘是否打开,若相等则为打开。试了之后,发现这个只对手机自带的键盘有作用,对安装的第三方的输入法没有效果。

还有介绍使用InputMethodManager 来获取键盘状态,代码如下

 InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
 boolean isOpen=imm.isActive();//isOpen若返回true,则表示输入法打开

这种并不能实时获取到键盘的状态,对我依然没有效果。

后来找到的解决方法,监听屏幕的变化,代码如下:

import android.app.Activity;
import android.content.Context;
import android.graphics.Rect;
import android.os.Build;
import android.util.Log;
import android.util.TypedValue;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;

/**
 * 
 * 软键盘的监听
 */

public class KeyBoardShowListener {
  private Context ctx;

  public KeyBoardShowListener(Context ctx) {
    this.ctx = ctx;
  }
  OnKeyboardVisibilityListener keyboardListener;

  public OnKeyboardVisibilityListener getKeyboardListener() {
    return keyboardListener;
  }

  public interface OnKeyboardVisibilityListener {


    void onVisibilityChanged(boolean visible);
  }

  public void setKeyboardListener(final OnKeyboardVisibilityListener listener, Activity activity) {
    final View activityRootView = ((ViewGroup) activity.findViewById(android.R.id.content)).getChildAt(0);

    activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

      private boolean wasOpened;

      private final int DefaultKeyboardDP = 100;

      // From @nathanielwolf answer... Lollipop includes button bar in the root. Add height of button bar (48dp) to maxDiff
      private final int EstimatedKeyboardDP = DefaultKeyboardDP + (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ? 48 : 0);

      private final Rect r = new Rect();

      @Override
      public void onGlobalLayout() {
        // Convert the dp to pixels.
        int estimatedKeyboardHeight = (int) TypedValue
            .applyDimension(TypedValue.COMPLEX_UNIT_DIP, EstimatedKeyboardDP, activityRootView.getResources().getDisplayMetrics());

        // Conclude whether the keyboard is shown or not.
        activityRootView.getWindowVisibleDisplayFrame(r);
        int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top);
        boolean isShown = heightDiff >= estimatedKeyboardHeight;

        if (isShown == wasOpened) {
          Log.e("Keyboard state", "Ignoring global layout change...");
          return;
        }

        wasOpened = isShown;
        listener.onVisibilityChanged(isShown);
      }
    });
  }
}

用法如下:

//监听软键盘的状态
new KeyBoardShowListener(Activity.this).setKeyboardListener(
    new KeyBoardShowListener.OnKeyboardVisibilityListener() {
      @Override
      public void onVisibilityChanged(boolean visible) {
        if (visible) {
          //软键盘已弹出
          
        } else {
          //软键盘未弹出
          
        }
      }
    }, Activity.this);

以下是可能会遇到的一些情况:

绑定软键盘到EditText

edit.setFocusable(true);
edit.setFocusableInTouchMode(true);
edit.requestFocus();
InputMethodManager inputManager = (InputMethodManager)edit.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
inputManager.showSoftInput(edit, 0);

去除软键盘显示:

editMsgView.setText("");
editMsgView.clearFocus();
//close InputMethodManager
InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(editMsgView.getWindowToken(), 0);

始终不弹出软件键盘

复制代码 代码如下:

EditText edit=(EditText)findViewById(R.id.edit); edit.setInputType(InputType.TYPE_NULL);

也可以:

InputMethodManager imm = (InputMethodManager)v.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
if(imm.isActive()){ //这里可以判断也可以不判断
imm.hideSoftInputFromWindow(v.getApplicationWindowToken(), 0 );
}

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

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