软键盘挡住

当软键盘出现遮挡住布局后，如果修改成SOFT_INPUT_ADJUST_PAN或SOFT_INPUT_ADJUST_RESIZE依然解决不了想要的需求，那么下面这个就是最合适解决软键盘挡住的方案了。
解决方案大概要述：把布局修改成滑动式布局，当出现软键盘后，将最外面的布局高度缩至软键盘上面，并且整体布局依然可以保持滑动。

对本身代码侵略性也少，一句代码放在Activity即可。

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        ```
        Softkeyboard.assistActivity(rlContent);
        ```
    }

布局

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/rlContent"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <include layout="@layout/newui_title_bar" />

        <ScrollView
            android:id="@+id/scrollView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_below="@+id/title_layout"
            android:animateLayoutChanges="true"
            android:orientation="vertical">

        </ScrollView>

    </RelativeLayout>

Softkeyboard

public class Softkeyboard {

    // For more information, see https://issuetracker.google.com/issues/36911528
    // To use this class, simply invoke assistActivity() on an Activity that already has its content view set.

    public static void assistActivity(Activity activity) {
        new Softkeyboard(activity);
    }

    public static void assistActivity(RelativeLayout rlContent) {
        new Softkeyboard(rlContent);
    }

    private View mChildOfContent;
    private int usableHeightPrevious;
    private FrameLayout.LayoutParams frameLayoutParams;

    private Softkeyboard(Activity activity) {
        FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);
        mChildOfContent = content.getChildAt(0);
        mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(() -> possiblyResizeChildOfContent());
        frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();
    }

    private Softkeyboard(RelativeLayout rlContent) {
        mChildOfContent = rlContent;
        mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(() -> possiblyResizeChildOfContent());
        frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();
    }

    private void possiblyResizeChildOfContent() {
        int usableHeightNow = computeUsableHeight();
        if (usableHeightNow != usableHeightPrevious) {
            int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();
            int heightDifference = usableHeightSansKeyboard - usableHeightNow;
            if (heightDifference > (usableHeightSansKeyboard / 5)) {
                // keyboard probably just became visible
                frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
            } else {
                // keyboard probably just became hidden
                frameLayoutParams.height = usableHeightSansKeyboard;
            }
            mChildOfContent.requestLayout();
            usableHeightPrevious = usableHeightNow;
        }
    }

    private int computeUsableHeight() {
        Rect r = new Rect();
        mChildOfContent.getWindowVisibleDisplayFrame(r);
        return (r.bottom - r.top);
    }

}

在这里对Softkeyboard的一段代码usableHeightSansKeyboard / 5说一下，如果包含导航栏也加入滑动布局的话，就 usableHeightSansKeyboard / 4