android 嵌套webview，软键盘遮挡输入框

实际项目中，android需要加载h5，经常遇到软键盘遮盖输入框的情况，h5测试的时候，是没问题的，但是在APP中是不能把页面推上去。经测试完美解决了这个问题。

1. oncreate

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try {
            web();
            layoutParams = (ConstraintLayout.LayoutParams) webView.getLayoutParams();
            decorView = getActivity().getWindow().getDecorView();
            decorView = getActivity().getWindow().getDecorView();
            if (decorView != null) {
                globalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
                    @Override
                    public void onGlobalLayout() {
                        if (webView != null) {
                            Rect rect = new Rect();
                            decorView.getWindowVisibleDisplayFrame(rect);
                            int screenHeight = decorView.getRootView().getHeight();
                            int keyboardHeight = screenHeight - rect.bottom;

                            if (currentHeight != keyboardHeight && keyboardHeight > 100) {
                                currentHeight = keyboardHeight;
                                ConstraintLayout.LayoutParams layoutParams = (ConstraintLayout.LayoutParams) webView.getLayoutParams();
                                if (layoutParams != null) {
                                    layoutParams.bottomMargin = keyboardHeight;
                                    webView.setLayoutParams(layoutParams);
                                }
                            }
                        }
                    }
                };

                ViewTreeObserver viewTreeObserver = decorView.getViewTreeObserver();
                if (viewTreeObserver != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
                    viewTreeObserver.addOnGlobalLayoutListener(globalLayoutListener);
                }
            }

        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
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2. 不要忘记

onDestroyView 销毁资源

public void onDestroyView() {
        super.onDestroyView();
        if (webView != null) {
            webView.stopLoading();
            webView.clearCache(true);
            webView.clearHistory();
            webView.destroy(); // 注意：调用destroy()后，WebView实例就不能再使用了
            webView = null;
        }
        if (decorView != null && decorView.getViewTreeObserver() != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
            decorView.getViewTreeObserver().removeOnGlobalLayoutListener(globalLayoutListener);
        }
    }

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