有没有方法检测软键盘是否在Android中打开？

我的应用程序旨在收集数据。但只有在键盘可见时才能收集数据。仅在用户正在输入时才收集数据是不够的，所以我肯定是需要知道键盘是否可见。有没有方法检测软键盘是否在Android中打开？

我知道，类似的问题被（How to check visibility of software keyboard in Android?）之前发布， 但upvotes严重号码的最后答案是，并我想了很多事情发生了Android，因为然后。

那么，我可以检测到键盘是否打开/可见？

来源

2016-10-17 keinabel

正如我所提到的，最后一个“有用的”答案是4年前的，并且从那以后很多已经改变了。我正在寻找一个最新的回答这个问题 – keinabel

目前我们的Androidñ现在还没有直接的方式，如果键盘被打开或不检测。只有像检查屏幕尺寸的解决方案才能解决问题。然而，这并不是全面的，有时会给出虚假的信号，例如在屏幕旋转或进入Android N的多窗口模式。

来源

2016-10-17 15:21:22 MarcinBednarek

正如你可能听说过的那样，没有直接的办法。但是，通过检查屏幕尺寸已经改变，通常可以发现这一点通过：

protected void onSizeChanged(int xNew, int yNew, int xOld, int yOld) { 
    super.onSizeChanged(xNew, yNew, xOld, yOld); 

    if (yOld > yNew) { 
     //Do Stuff Here 
    } 
}

希望我帮助：d

来源

2016-10-17 13:59:39 Rippr

在创建一个类

package com.dubaipolice.app.utils; 

import android.content.Context; 
import android.content.res.Resources; 
import android.graphics.Rect; 
import android.util.TypedValue; 
import android.view.View; 
import android.view.ViewTreeObserver; 

import java.util.LinkedList; 
import java.util.List; 

/** 
* Created by dev101 on 1/13/15. 
*/ 
public class SoftKeyboardStateHelper implements ViewTreeObserver.OnGlobalLayoutListener { 

    float LIMIT = 100; 

    public interface SoftKeyboardStateListener { 
     void onSoftKeyboardOpened(int keyboardHeightInPx); 

     void onSoftKeyboardClosed(); 
    } 

    private final List<SoftKeyboardStateListener> listeners = new LinkedList<SoftKeyboardStateListener>(); 
    private final View activityRootView; 
    private int lastSoftKeyboardHeightInPx; 
    private boolean isSoftKeyboardOpened; 

    public SoftKeyboardStateHelper(Context context, View activityRootView) { 
     this(activityRootView, false); 
     Resources r = context.getResources(); 
     LIMIT = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, r.getDisplayMetrics()); 
    } 

    public SoftKeyboardStateHelper(View activityRootView, boolean isSoftKeyboardOpened) { 
     this.activityRootView = activityRootView; 
     this.isSoftKeyboardOpened = isSoftKeyboardOpened; 
     activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(this); 
    } 

    @Override 
    public void onGlobalLayout() { 
     final Rect r = new Rect(); 
     //r will be populated with the coordinates of your view that area still visible. 
     activityRootView.getWindowVisibleDisplayFrame(r); 

     final int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top); 
     if (!isSoftKeyboardOpened && heightDiff > LIMIT) { // if more than 100 pixels, its probably a keyboard... 
      isSoftKeyboardOpened = true; 
      notifyOnSoftKeyboardOpened(heightDiff); 
     } else if (isSoftKeyboardOpened && heightDiff < LIMIT) { 
      isSoftKeyboardOpened = false; 
      notifyOnSoftKeyboardClosed(); 
     } 
    } 

    public void setIsSoftKeyboardOpened(boolean isSoftKeyboardOpened) { 
     this.isSoftKeyboardOpened = isSoftKeyboardOpened; 
    } 

    public boolean isSoftKeyboardOpened() { 
     return isSoftKeyboardOpened; 
    } 

    /** 
    * Default value is zero (0) 
    * 
    * @return last saved keyboard height in px 
    */ 
    public int getLastSoftKeyboardHeightInPx() { 
     return lastSoftKeyboardHeightInPx; 
    } 

    public void addSoftKeyboardStateListener(SoftKeyboardStateListener listener) { 
     listeners.add(listener); 
    } 

    public void removeSoftKeyboardStateListener(SoftKeyboardStateListener listener) { 
     listeners.remove(listener); 
    } 

    private void notifyOnSoftKeyboardOpened(int keyboardHeightInPx) { 
     this.lastSoftKeyboardHeightInPx = keyboardHeightInPx; 

     for (SoftKeyboardStateListener listener : listeners) { 
      if (listener != null) { 
       listener.onSoftKeyboardOpened(keyboardHeightInPx); 
      } 
     } 
    } 

    private void notifyOnSoftKeyboardClosed() { 
     for (SoftKeyboardStateListener listener : listeners) { 
      if (listener != null) { 
       listener.onSoftKeyboardClosed(); 
      } 
     } 
    } 
}

然后你活动的onCreate，添加以下行

final SoftKeyboardStateHelper softKeyboardStateHelper = new SoftKeyboardStateHelper(context, findViewById(R.id.parent)); 
     softKeyboardStateHelper.addSoftKeyboardStateListener(softKeyboardStateListener);

其中R.id.parent是您的活动的ID父布局和softKeyboardStateListener定义如下

SoftKeyboardStateHelper.SoftKeyboardStateListener softKeyboardStateListener = new SoftKeyboardStateHelper.SoftKeyboardStateListener() { 
     @Override 
     public void onSoftKeyboardOpened(int keyboardHeightInPx) { 

     } 

     @Override 
     public void onSoftKeyboardClosed() { 

     } 
    };

来源

2016-10-17 14:00:38

完美的作品！非常感谢:) – error1337

这个工程。谢谢！ –

我以前遇到过同样的问题。经过大量的试验和错误，并遵循其他人的建议，我想出了对我来说很好的实施方案。这里是link。

来源

2017-11-13 08:08:48

有没有方法检测软键盘是否在Android中打开？

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