一、Layout.xml

1.1 此视图不受垂直约束

This view is not constrained vertically: at runtime it will jump to the top unless you add a 
vertical constraint less... (⌘F1) 

Inspection info:The layout editor allows you to place widgets anywhere on the canvas, and it 
records the current position with designtime attributes (such as layout_editor_absoluteX). 
These attributes are not applied at runtime, so if you push your layout on a device, the 
widgets may appear in a different location than shown in the editor. To fix this, make sure 
a widget has both horizontal and vertical constraints by dragging from the edge connections.

1.2

The layout "activity_subconversationlist" in layout has no declaration in the base layout 
folder; this can lead to crashes when the resource is queried in a configuration that does 
not match this qualifier less... (⌘F1) 
Inspection info:If a resource is only defined in folders with qualifiers like -land or -en,
and there is no default declaration in the base folder (layout or values etc), then the app 
will crash if that resource is accessed on a device where the device is in a configuration 
missing the given qualifier.  As a special case, drawables do not have to be specified in 
the base folder; if there is a match in a density folder (such as drawable-mdpi) that image 
will be used and scaled. Note however that if you only specify a drawable in a folder like 
drawable-en-hdpi, the app will crash in non-English locales.  There may be scenarios where
you have a resource, such as a -fr drawable, which is only referenced from some other 
resource with the same qualifiers (such as a -fr style), which itself has safe fallbacks.
However, this still makes it possible for somebody to accidentally reference the drawable 
and crash, so it is safer to create a default dummy fallback in the base folder. 
Alternatively, you can suppress the issue by adding tools:ignore="MissingDefaultResource" on 
the element.  (This scenario frequently happens with string translations, where you might 
delete code and the corresponding resources, but forget to delete a translation. There is a 
dedicated issue id for that scenario, with the id ExtraTranslation.)  Issue id: 
MissingDefaultResource
©2020 洛易                        皖ICP备15026941号-4 该文件修订时间: 2019-09-17 19:19:10

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