以下代码来自于一位热心的大佬之手，感谢大佬帮忙解决问题！！！
有时候会有些特殊的情况需要监听软件盘的 弹出状态！ 基本上都是 在软键盘弹出的时候，根据布局高度的变化来判断 软键盘的状态！
注意：有时候为了防止软键盘将底部导航栏顶起，需要在Activity中设置一下属性
android:windowSoftInputMode="adjustPan|stateHidden"
但是“adjustPan” 会导致方式一失效，此时方式二课完美解决。
方式一：普通情况OK
public class KeyboardChangeListener implements ViewTreeObserver.OnGlobalLayoutListener {
private static final String TAG = "ListenerHandler";
private View mContentView;
private int mOriginHeight;
private int mPreHeight;
private KeyBoardListener mKeyBoardListen;
public interface KeyBoardListener {
/**
* call back
* @param isShow true is show else hidden
* @param keyboardHeight keyboard height
*/
void onKeyboardChange(boolean isShow, int keyboardHeight);
}
public void setKeyBoardListener(KeyBoardListener keyBoardListen) {
this.mKeyBoardListen = keyBoardListen;
}
public KeyboardChangeListener(Activity contextObj) {
if (contextObj == null) {
Log.i(TAG, "contextObj is null");
return;
}
mContentView = findContentView(contextObj);
if (mContentView != null) {
addContentTreeObserver();
}
}
private View findContentView(Activity contextObj) {
return contextObj.findViewById(android.R.id.content);
}
private void addContentTreeObserver() {
mContentView.getViewTreeObserver().addOnGlobalLayoutListener(this);
}
@Override
public void onGlobalLayout() {
int currHeight = mContentView.getHeight();
if (currHeight == 0) {
Log.i(TAG, "currHeight is 0");
return;
}
boolean hasChange = false;
if (mPreHeight == 0) {
mPreHeight = currHeight;
mOriginHeight = currHeight;
} else {
if (mPreHeight != currHeight) {
hasChange = true;
mPreHeight = currHeight;
} else {
hasChange = false;
}
}
if (hasChange) {
boolean isShow;
int keyboardHeight = 0;
if (mOriginHeight == currHeight) {
//hidden
isShow = false;
} else {
//show
keyboardHeight = mOriginHeight - currHeight;
isShow = true;
}
if (mKeyBoardListen != null) {
mKeyBoardListen.onKeyboardChange(isShow, keyboardHeight);
}
}
}
@SuppressLint("NewApi")
public void destroy() {
if (mContentView != null) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
mContentView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
}
}
}
}
使用方法：
方式二：普通情况，以及特殊情况OK
*/public class KeyboardStatusDetector { private static final int SOFT_KEY_BOARD_MIN_HEIGHT = 100; private KeyboardVisibilityListener mVisibilityListener; boolean keyboardVisible = false; public KeyboardStatusDetector registerFragment(Fragment f) { return registerView(f.getView()); } public KeyboardStatusDetector registerActivity(Activity a) { return registerView(a.getWindow().getDecorView().findViewById(android.R.id.content)); } public KeyboardStatusDetector registerView(final View v) { v.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() { @Override public void onGlobalLayout() { Rect r = new Rect(); v.getWindowVisibleDisplayFrame(r); int heightDiff = v.getRootView().getHeight() - (r.bottom - r.top); if (heightDiff > SOFT_KEY_BOARD_MIN_HEIGHT) { // if more than 100 pixels, its probably a keyboard... if (!keyboardVisible) { keyboardVisible = true; if (mVisibilityListener != null) { mVisibilityListener.onVisibilityChanged(true); } } } else { if (keyboardVisible) { keyboardVisible = false; if (mVisibilityListener != null) { mVisibilityListener.onVisibilityChanged(false); } } } } }); return this; } public KeyboardStatusDetector setmVisibilityListener(KeyboardVisibilityListener listener) { mVisibilityListener = listener; return this; } public interface KeyboardVisibilityListener { void onVisibilityChanged(boolean keyboardVisible); }}
使用方式：
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