CodeK1988

git init                                                  # 初始化本地git仓库（创建新仓库）
git config --global user.name "xxx"                       # 配置用户名
git config --global user.email "xxx@xxx.com"              # 配置邮件
git config --global color.ui true                         # git status等命令自动着色
git config --global color.status auto
git config --global color.diff auto
git config --global color.branch auto
git config --global color.interactive auto
git config --global --unset http.proxy                    # remove  proxy configuration on git
git clone git+ssh://git@192.168.53.168/VT.git             # clone远程仓库

CodeK1988

var snapHelper: LinearSnapHelper = object : LinearSnapHelper() {
        override fun findTargetSnapPosition(layoutManager: RecyclerView.LayoutManager?, velocityX: Int, velocityY: Int): Int {
            val centerView = findSnapView(layoutManager!!) ?: return RecyclerView.NO_POSITION
            val position = layoutManager.getPosition(centerView)
            var targetPosition = -1
            if (layoutManager.canScrollHorizontally()) {
                targetPosition = if (velocityX < 0) {
                    position - 1
                } else {
                    position + 1

CodeK1988

class CenterZoomLinearLayoutManager(context: Context)
    : LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false) {

    override fun onLayoutCompleted(state: RecyclerView.State?) {
        super.onLayoutCompleted(state)
        scaleChildren()
    }

    override fun scrollHorizontallyBy(dx: Int, recycler: RecyclerView.Recycler?, state: RecyclerView.State?): Int {
        return if (orientation == HORIZONTAL) {

CodeK1988

class SnapOnScrollListener(
        private val snapHelper: SnapHelper,
        var onSnapPositionChangeListener: Utils.OnSnapPositionChangeListener? = null
) : RecyclerView.OnScrollListener() {

    private var snapPosition = RecyclerView.NO_POSITION

    override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
        /*val snapPosition = snapHelper.getSnapPosition(recyclerView)
        val snapPositionChanged = this.snapPosition != snapPosition

CodeK1988

fun RecyclerView.attachSnapHelperWithListener(
        snapHelper: SnapHelper,
        onSnapPositionChangeListener: Utils.OnSnapPositionChangeListener) {
    snapHelper.attachToRecyclerView(this)
    val snapOnScrollListener = SnapOnScrollListener(snapHelper, onSnapPositionChangeListener)
    addOnScrollListener(snapOnScrollListener)
}

fun SnapHelper.getSnapPosition(recyclerView: RecyclerView): Int {
    val layoutManager = recyclerView.layoutManager ?: return RecyclerView.NO_POSITION

CodeK1988

override fun getItemCount(): Int {
    return Int.MAX_VALUE
}

override fun onBindViewHolder(holder: CustomPlanViewHolder, position: Int) {
    if (list.isNotEmpty()) {
        holder.bind(list[position % list.size])
    }
}

CodeK1988

1.AndroidX migrate dependency / libraries
I solved this issue by deleting .idea folder and syncing project again.
https://stackoverflow.com/questions/52518935/androidx-migrate-dependency-libraries


2.After migrating to androidx: Didn't find class “androidx.constraintlayout.ConstraintLayout” on path: DexPathList
https://stackoverflow.com/questions/54757911/after-migrating-to-androidx-didnt-find-class-androidx-constraintlayout-constr


3.Databinding kotlin 

CodeK1988

遇到的问题 
https://stackoverflow.com/questions/17630336/space-between-keyboard-and-edittext-in-android/25400043

1.edittext 试着加paddingBottom 是有用的 但是edittext字体sp ！= dp 不太好写布局
2.stateHidden|adjustResize 或者 adjustPan 选一种 前者是页面允许压缩  但是我的页面比较紧凑不太合适 所以只有用 adjustPan
3.接着想是不是监听键盘展开收起 试着ConstraintLayout外层添加滑动布局让其滑动到一定的高度呢？

ScrollView scrollto (0,height) 不管用 试了很久 忽然想到 是不是ScrollView android:layout_height="match_parent" 导致的？

又尝试了很久。。。

CodeK1988

private var audioManager: AudioManager? = null
audioManager = getSystemService(Context.AUDIO_SERVICE) as AudioManager

override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
    when (keyCode) {
        KeyEvent.KEYCODE_BACK -> {
           
        }
        KeyEvent.KEYCODE_VOLUME_DOWN -> {
            audioManager?.adjustStreamVolume(AudioManager.STREAM_MUSIC, AudioManager.ADJUST_LOWER, AudioManager.FLAG_SHOW_UI)

CodeK1988

Application

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
    StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
    StrictMode.setVmPolicy(builder.build());
}


Uri uri;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {