CodeK1988

1.dialogfragment 返回事件处理

继承 DialogInterface.OnKeyListener
override fun onKey(dialog: DialogInterface?, keyCode: Int, event: KeyEvent?): Boolean {
    return keyCode == KeyEvent.KEYCODE_BACK //自行修改 我的是禁用返回键
}

donot forget 
dialog.setOnKeyListener(this)

CodeK1988

thanks

https://developer.android.com/studio/build/optimize-your-build?hl=zh-cn

https://developer.android.com/studio/releases/gradle-plugin

CodeK1988

thanks:
[Manage touch events in a ViewGroup](https://developer.android.com/training/gestures/viewgroup）
https://medium.com/@suragch/how-touch-events-are-delivered-in-android-eee3b607b038

焦点问题遇到的比较少 特此记录一下 加深理解和记忆

CodeK1988

/**
 * thanks https://stackoverflow.com/questions/36093384/stop-nestedscrollview-inside-viewpager-to-process-horizontal-scrolls
 */
public class VerticalOnlyNestedScrollView extends NestedScrollView {


    public VerticalOnlyNestedScrollView(Context context) {
        super(context);
    }

CodeK1988

Intent getAlbum = new Intent(Intent.ACTION_GET_CONTENT);
getAlbum.setType("image/*");
startActivityForResult(getAlbum, REQUEST_CODE_PICK_IMAGE);

xiaomi M4 not working
replace 

Intent intent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, REQUEST_CODE_PICK_IMAGE);

CodeK1988

1.NestedScrollView RecyclerView recyclerView always scroll top
add 
  recyclerView.isFocusableInTouchMode = false
  recyclerView.requestFocus()
its working!

2.addItemDecoration 
if (recyclerView.itemDecorationCount > 0) {
    val itemDecorationAt = recyclerView.getItemDecorationAt(0)
    if (itemDecorationAt == null) {

CodeK1988

Bitmap too large to be uploaded into a texture (1080x4153, max=4096x4096)

thanks:
https://medium.com/digio-australia/custom-image-manipulation-crop-and-translate-at-load-time-with-glide-on-android-cb556f5a5aae
https://github.com/mantel-digio/GlideCropper/blob/master/app/src/main/java/au/com/digio/glidecropper/widget/CroppedImageView.kt

https://developer.android.com/topic/performance/graphics/load-bitmap

吐槽：
csdn 上的技术博文大大大大大部分质量真是差劲 一点验证意识都没有。

CodeK1988

private void disAppBarScroll() {
    try {
        CoordinatorLayout.LayoutParams layoutParams = (CoordinatorLayout.LayoutParams) apl_module.getLayoutParams();
        AppBarLayout.Behavior behavior = (AppBarLayout.Behavior) layoutParams.getBehavior();
        if (behavior != null) {
            behavior.setDragCallback(new AppBarLayout.Behavior.DragCallback() {
                @Override
                public boolean canDrag(@NonNull AppBarLayout appBarLayout) {
                    return false;
                }

CodeK1988

thanks: 
https://medium.com/@rygel/stop-repeating-yourself-and-create-custom-views-on-android-with-kotlin-f5b3fc581c0e
https://medium.com/@elye.project/building-custom-component-with-kotlin-fc082678b080
https://medium.com/@mmlodawski/https-medium-com-mmlodawski-do-not-always-trust-jvmoverloads-5251f1ad2cfe
1.
constructor(context: Context) : super(context) {
    init(context)
}

constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {

CodeK1988

hdpi  72x72
mdpi  48x48
xhdpi  96x96
xxhdpi 144x144 
xxxhdpi 192x192


android中的dp在渲染前会将dp转为px，计算公式：
px = density * dp;
density = dpi / 160;