问题描述

安卓软键盘的右上角的那个收起键按钮是那个值呢？

安卓的键盘右上角的那个向下的箭头，点击了以后键盘关闭，点击那个按钮的值是那个呢?

解决方案

4.点击软键盘自带的收起按钮（软键盘收起）

问题卡在此处，经过资料的搜查，还是么能找到软键盘收起按钮事件监听的办法，最后在stackoverflow网站找到了从布局高度的变化来判断软键盘的打开和收起事件。

import android.graphics.Rect;
import android.view.View;
import android.view.ViewTreeObserver;

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

public class SoftKeyboardStateHelper implements ViewTreeObserver.OnGlobalLayoutListener {

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(View activityRootView) {    this(activityRootView false);}public SoftKeyboardStateHelper(View activityRootView boolean isSoftKeyboardOpened) {    this.activityRootView     = activityRootView;    this.isSoftKeyboardOpened = isSoftKeyboardOpened;    activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(this);}@Overridepublic 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 > 100) { // if more than 100 pixels its probably a keyboard...        isSoftKeyboardOpened = true;        notifyOnSoftKeyboardOpened(heightDiff);    } else if (isSoftKeyboardOpened && heightDiff < 100) {        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();        }    }}

}

代码的使用：

final SoftKeyboardStateHelper softKeyboardStateHelper = new SoftKeyboardStateHelper(findViewById(R.id.activity_main_layout);
softKeyboardStateHelper.addSoftKeyboardStateListener(...);
// then just handle callbacks