EditText输入框自动顶上去2种解决方案

1、用一个Space顶上去。
2、用ScrollView解决。

遇到的坑：
1、使用方案1时，部分手机有虚拟键盘，需判断在有虚拟键盘上的手机加一个虚拟键盘的高度。

方案1：用一个Space顶上去。

xml：

<FrameLayout>
     <主内容/>
     <LinearLayout>
         <EditText/>
         </Space>
     </LinearLayout>
</FrameLayout>

java：

private KeyboardChangeListener mKeyboardChangeListener;
private boolean isVisiableForLast;

private void initListener(){
        mKeyboardChangeListener = new KeyboardChangeListener(_mActivity);
        mKeyboardChangeListener.setKeyBoardListener((isShow, keyboardHeight) -> ALog.e(TAG, "isShow = [" + isShow + "], keyboardHeight = [" + keyboardHeight + "]"));

        final View decorView = _mActivity.getWindow().getDecorView();
        //计算出可见屏幕的高度
        //获得屏幕整体的高度
        //获得键盘高度
        globalLayoutListener = () -> {
            Rect rect = new Rect();
            decorView.getWindowVisibleDisplayFrame(rect);
            //计算出可见屏幕的高度
            int displayHight = rect.bottom - rect.top;
            //获得屏幕整体的高度
            int hight = decorView.getHeight();
            //获得键盘高度
            int keyboardHeight = hight - displayHight;
            boolean visible = (double) displayHight / hight < 0.8;
            if (visible != isVisiableForLast) {
                listener.onSoftKeyBoardVisible(visible, keyboardHeight);
            }
            isVisiableForLast = visible;
        };
        //注册布局变化监听
        decorView.getViewTreeObserver().addOnGlobalLayoutListener(globalLayoutListener);
}


IKeyBoardVisibleListener listener = new IKeyBoardVisibleListener() {
        @Override
        public void onSoftKeyBoardVisible(boolean visible, int windowBottom) {
            windowBottom -= ScreenUtils.getStatusBarHeight(InputFromActivity.this);
            if (checkDeviceHasNavigationBar(InputFromActivity.this)) {
                windowBottom -= getBottomKeyboardHeight();
            }
            if (visible) {
                LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, windowBottom);
                spaceInput.setLayoutParams(lp);
            } else {
                LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 0);
                spaceInput.setLayoutParams(lp);
            }
            Log.d(TAG, "onSoftKeyBoardVisible ---- visible:" + visible + " windowBottom:" + windowBottom);
        }
    };

interface IKeyBoardVisibleListener {
        void onSoftKeyBoardVisible(boolean visible, int windowBottom);
}

//------------------------ 检测虚拟键盘部分----------------------
//获取是否存在NavigationBar
    public static boolean checkDeviceHasNavigationBar(Context context) {
        boolean hasNavigationBar = false;
        Resources rs = context.getResources();
        int id = rs.getIdentifier("config_showNavigationBar", "bool", "android");
        if (id > 0) {
            hasNavigationBar = rs.getBoolean(id);
        }
        try {
            Class systemPropertiesClass = Class.forName("android.os.SystemProperties");
            Method m = systemPropertiesClass.getMethod("get", String.class);
            String navBarOverride = (String) m.invoke(systemPropertiesClass, "qemu.hw.mainkeys");
            if ("1".equals(navBarOverride)) {
                hasNavigationBar = false;
            } else if ("0".equals(navBarOverride)) {
                hasNavigationBar = true;
            }
        } catch (Exception e) {

        }
        return hasNavigationBar;
    }

    //获取虚拟键盘高度
    public int getBottomKeyboardHeight() {
        int screenHeight = getAccurateScreenDpi()[1];
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        int heightDifference = screenHeight - dm.heightPixels;
        return heightDifference;
    }

    /**
     * 获取精确的屏幕大小
     */
    public int[] getAccurateScreenDpi() {
        int[] screenWH = new int[2];
        Display display = getWindowManager().getDefaultDisplay();
        DisplayMetrics dm = new DisplayMetrics();
        try {
            Class<?> c = Class.forName("android.view.Display");
            Method method = c.getMethod("getRealMetrics", DisplayMetrics.class);
            method.invoke(display, dm);
            screenWH[0] = dm.widthPixels;
            screenWH[1] = dm.heightPixels;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return screenWH;
    }

方案2：用ScrollView解决。

xml：

<Fragment>
    <ScrollView>
        </主内容>
    </ScrollView>
    <LinearLayout>
         <EditText/>
     </LinearLayout>
</Fragment>

注：采用第二种方案无序写java代码

建议：

方案1最好用在主内容是RecyclerView或ListView的布局，原因是防止和ScrollView发生冲突。