Record - solve a transparent status bar, soft keyboard pops up problems

Disclaimer: This article is a blogger original article, follow the CC 4.0 BY-SA copyright agreement, reproduced, please attach the original source link and this statement.

This link: https://blog.csdn.net/qq_20352713/article/details/102778264

1. Questions ready

Landing page, two input boxes. Root control is ScrollView.

Looking at the layout base, it is a LinearLayout

configuration omitted transparent status bar, own inspection
run it and see the effect
when android:windowSoftInputMode="adjustResize"when the effect is as follows

When you click a password, a soft keyboard pops up. But the interface does not roll online.

When android:windowSoftInputMode="adjustPan"the time following effects

input box displayed, but. Controls at the top also was the top online.
These two results are not what we want.

2. Directly on solutions

public class SoftHideKeyBoardUtil {
    public static void assistActivity (Activity activity) {
        new SoftHideKeyBoardUtil(activity);
    }
    private View mChildOfContent;
    private int usableHeightPrevious;
    private ViewGroup.LayoutParams frameLayoutParams;
    //为适应华为小米等手机键盘上方出现黑条或不适配
    private int contentHeight;//获取setContentView本来view的高度
    private boolean isfirst = true;//只用获取一次
    private  int statusBarHeight;//状态栏高度
    private SoftHideKeyBoardUtil(Activity activity) {
        //1､找到Activity的最外层布局控件，它其实是一个DecorView,它所用的控件就是FrameLayout
        FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);

        statusBarHeight = getStatusBarHeight(((Context) activity));

        //2､获取到setContentView放进去的View
//        mChildOfContent = content.getChildAt(0);
        mChildOfContent = content;
        //3､给Activity的xml布局设置View树监听，当布局有变化，如键盘弹出或收起时，都会回调此监听
        mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            //4､软键盘弹起会使GlobalLayout发生变化
            public void onGlobalLayout() {
                if (isfirst) {
                    contentHeight = mChildOfContent.getHeight();//兼容华为等机型
                    isfirst = false;
                }
                //5､当前布局发生变化时，对Activity的xml布局进行重绘
                possiblyResizeChildOfContent();
            }
        });
        //6､获取到Activity的xml布局的放置参数
        frameLayoutParams = mChildOfContent.getLayoutParams();

        mChildOfContent.setBackgroundColor(Color.RED);
    }

    // 获取界面可用高度，如果软键盘弹起后，Activity的xml布局可用高度需要减去键盘高度
    private void possiblyResizeChildOfContent() {
        //1､获取当前界面可用高度，键盘弹起后，当前界面可用布局会减少键盘的高度
        int usableHeightNow = computeUsableHeight();
        //2､如果当前可用高度和原始值不一样
        if (usableHeightNow != usableHeightPrevious) {
            //3､获取Activity中xml中布局在当前界面显示的高度
            int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();
            //4､Activity中xml布局的高度-当前可用高度
            int heightDifference = usableHeightSansKeyboard - usableHeightNow;
            //5､高度差大于屏幕1/4时，说明键盘弹出
            if (heightDifference > (usableHeightSansKeyboard/4)) {
                // 6､键盘弹出了，Activity的xml布局高度应当减去键盘高度

//                需要注意的是，在不同的SDK版本下，该FrameLayout所指的显示区域也不同。具体如下
//                在sdk 14+(native ActionBar),该显示区域指的是ActionBar下面的部分
//                在Support Library revision lower than 19，使用AppCompat，则显示区域包含ActionBar
//                在Support Library revision 19 (or greater)，使用AppCompat，则显示区域不包含ActionBar，即行为与第一种情况相同。
//                所以如果不使用Support Library或使用Support Library的最新版本，则R.id.content所指的区域都是ActionBar以下

                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
                    frameLayoutParams.height = usableHeightSansKeyboard - heightDifference + statusBarHeight;
                } else {
                    frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;
                }
            } else {
                frameLayoutParams.height = contentHeight;
            }
            //7､ 重绘Activity的xml布局
            mChildOfContent.requestLayout();
            usableHeightPrevious = usableHeightNow;
        }
    }
    private int computeUsableHeight() {
        Rect r = new Rect();
        mChildOfContent.getWindowVisibleDisplayFrame(r);
        // 全屏模式下：直接返回r.bottom，r.top其实是状态栏的高度
        return (r.bottom - r.top);
    }
    /**
     * 获取状态栏高度
     * @param context
     * @return
     */
    public int getStatusBarHeight(Context context) {
        Resources resources = context.getResources();
        int resourceId = resources.getIdentifier("status_bar_height", "dimen", "android");
        int height = resources.getDimensionPixelSize(resourceId);
        return height;
    }
}

This tool also modifies the height of the sub-space in DecorView, plus ScrollView rolling landing pages to ensure that the top is not top up

Specific use only in an Activity

SoftHideKeyBoardUtil.assistActivity(this)

final effect