项目中有时候需要监听keyboard的显示与隐藏，特此备注，方便使用。
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public class {
private ViewTreeObserver.OnGlobalLayoutListener onGlobalLayoutListener;
private View rootView;
private int viewSize = -1;
private boolean isShowing = false;
private OnKeyboardListener onKeyboardListener;
public (Activity activity){
rootView = activity.getWindow().getDecorView().getRootView();
}
public KeyboardWatcher register(OnKeyboardListener listener){
onKeyboardListener = listener;
if(onGlobalLayoutListener == null) {
onGlobalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
public void onGlobalLayout() {
Rect r = new Rect();
rootView.getWindowVisibleDisplayFrame(r);
int viewHeight = r.bottom - r.top;
if(viewSize < 0){
viewSize = viewHeight;
return;
}
if(viewHeight != viewSize){
if(Math.abs(viewHeight - viewSize) > dpToPx(rootView.getContext(),100)) {
if (viewHeight < viewSize && !isShowing) {
onKeyboardListener.onShow(viewHeight);
isShowing = true;
} else if(isShowing){
onKeyboardListener.onHide();
isShowing = false;
}
}
viewSize = viewHeight;
}
}
};
}
rootView.post(new Runnable() {
public void run() {
viewSize = rootView.getHeight();
rootView.getViewTreeObserver().addOnGlobalLayoutListener(onGlobalLayoutListener);
}
});
return this;
}
public void unRegister(){
rootView.getViewTreeObserver().removeGlobalOnLayoutListener(onGlobalLayoutListener);
rootView = null;
}
public interface OnKeyboardListener{
void onShow(int viewSize);
void onHide();
}
private int dpToPx(Context context,int dp) {
return (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP, dp, context.getResources().getDisplayMetrics()
);
}
}
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KeyBoardWatcher keyboardWatcher = new KeyboardWatcher()
keyboardWatcher.register(this)
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