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android fresco use webp 


XML:






xmlns:fresco="http://schemas.android.com/apk/res-auto"




<com.facebook.drawee.view.SimpleDraweeView    


android:id="@+id/my_image_view"    


android:layout_width="200dp"    


android:layout_height="200dp"    


fresco:placeholderImage="@color/colorAccent"    />









Java:








super.onCreate(savedInstanceState);
Fresco.initialize(this);
setContentView(R.layout.activity_main);
Uri uri = Uri.parse("res:///"+R.drawable.home);
SimpleDraweeView draweeView = (SimpleDraweeView) findViewById(R.id.my_image_view);
draweeView.setImageURI(uri);















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go url encoding




























 func  QueryUnescape  func QueryUnescape (s string ) ( string , error )   QueryUnescape does the inverse transformation of QueryEscape, converting %AB into the byte 0xAB and '+' into ' ' (space). It returns an error if any % is not followed by two hexadecimal digits.     func  QueryUnescape  func QueryUnescape (s string ) ( string , error )   QueryUnescape does the inverse transformation of QueryEscape, converting %AB into the byte 0xAB and '+' into ' ' (space). It returns an error if any % is not followed by two hexadecimal digits.  




















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go golang get disk usage free space remain info




























package main   import (   "fmt"   "syscall"  )   func main() {   fmt.Println(DiskUsage("./"))  }   func DiskUsage(path string) uint64 {   fs := syscall.Statfs_t{}   err := syscall.Statfs(path, &fs)   if err != nil {    return 0   }   return fs.Bfree * uint64(fs.Bsize)  }   //All space   = fs.Blocks * uint64(fs.Bsize)  //Free space = fs.Bfree * uint64(fs.Bsize)  //Used space= fs.All - disk.Free  




















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go mobile setup




























Preparing:  1.Install NDK  2.Install Android-Studio  &&  SDK (with env ANDROID_HOME)  3.Install Go / git   Step 1:  $ go get golang.org/x/mobile/cmd/gomobile  $gomobile init -ndk ~/Android/Ndk      Native App:   1.Android  basic/main.go  package main  import (  "log"   "golang.org/x/mobile/app"  "golang.org/x/mobile/event/lifecycle"  "golang.org/x/mobile/event/paint" )  func main() {  app.Main(func(a app.App) {   for e := range a.Events() {    switch e := a.Filter(e).(type) {    case lifecycle.Event:     // ...    case paint.Event:     log.Print("Call OpenGL here.")     a.Publish()    }   }  }) }  $gomobile build -target=android  basic/  $adb install basic.apk  2.iOS:  $gomobile build -target=android  basic/    SDK App:   hello/hello.go   package hello  import "fmt"  func Greetings(name string) string {  return fmt.Sprintf("Hello, %s!", name) }       1.Android:   $ gomobile   bind   -target=android    hello/ ...




















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