screens (ldpi) small screen medium density screen (MDPI) medium high density screens (hdpi) Large screen x px32 x px48 x px5. Android Bottom or top tab tab icon1. Large screen (hdpi)Screens:1. Full picture (red): x px2. Icon (blue): x px1.Medium screen (MDPI) screens:1.Full Picture: x px2.Icon: x px1.Small screen (ldpi) screens:1.Full Picture: x px2. Icon: X × px6. Android Bottom status bar iconLDPI (+ dpi) small screen mdpi (approx. dpi) Mid-screen
a property animation needs to close the animation in a timely manner when the activity exits, or it will cause a memory leak due to activity not being released.3. Compatibility issues4. Do not use PX5. Animation element interactionAfter API11, the effect of the property animation is to change the view's position, and the view only changes the effect, so the event response can be problematic.6, the problem of view animationBecause the view animation i
first, some basic concepts1, Length (true length): inches, inch2. Resolution: density pixels per inch dpi (density)3, Pixels: px4, Dip formula: px/dip=dpi/160 so dip similar to inches, length (dp=dip,sp similar to dip) dip=160*inchdip= 160/dpi * pxWhen the dip is certain, the larger the DPI, the greater the PX5, generalized resolution = long px* width pxsecond, the common law1, usually we say that the resolution of the cell phone is 320*480, in fact,
Style operations. CSS () and element data storage.1. The CSS () method is used to get the calculated value of the element style property or to set the element's CSS properties2. CSS () 2 ways to get the calculated value of an element style attribute. CSS (PropertyName) Gets the computed value of the style attribute that matches the first element in the collection of elements. CSS (propertynames) passes a set of arrays, returning an object result 3 . CSS () 3 ways to set CSS properties for an ele
component when the user taps the Start button are uploaded immediately. Set the Autoupload value to True to automatically upload.Type:booleanDefault:true5. Acceptfiletypes: Types of files that are allowed to be uploadedExample:/(\.| \/) (GIF|JPE?G|PNG|XLSX) $/i6. MaxFileSize: Maximum upload file sizeexample:999000 (999KB)//unit: B7. Minfilesize: Minimum upload file sizeexample:100000 (100KB)//unit: B8.previewMaxWidth: Maximum width of picture preview areaEXAMPLE:100//unit:
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