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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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android hide actionbar




























public class  MainActivity  extends  Activity  {      ActionBar  actionBar; //声明ActionBar       @Override      protected  void onCreate( Bundle  savedInstanceState) {  super .onCreate(savedInstanceState);  setContentView( R .layout.activity_main);   actionBar = getSupportActionBar(); //得 到ActionBar   actionBar.hide(); //隐藏ActionBar      } }    




















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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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