android-using Getidentifier () to get the resource ID

Use Getidentifier () to get the resource ID

int i=  getresources (). Getidentifier ("icon", "drawable", Getpackagename ()); if (i>0)        {log.i ("AA", "AA");} Else         {log.i ("VBV", "AA");}

Or

int ResID = getresources (). Getidentifier ("org.loveandroid.androidtest:drawable/gallery_photo_1",null ,nullintnullnull//int ResID = Getresources (). Getidentifier ("Bug", "drawable", "Org.anddev.android.testproject"// The first parameter: full_package:type/filename_without_ending is this format and the other can be null

int NULL NULL );      // or      int idflag = getresources (). Getidentifier ("Flag", "drawable", Getpackagename ());    

New Drawable[10];           for (int i = 1; I <=; i++) {       int id = getresources (). Getidentifier ("flag" + I,  "Drawa Ble ", Getpackagename ());       Dw[i-1] = getresources (). getdrawable (ID);}  

//All resources can be obtained by reflection method.Private void_dumpallresourceids (Class<?>ClassType)throwsillegalargumentexception {field[] fIDs=Classtype.getfields (); Try {          for(inti = 0; i < fids.length; i++) {Field fld=Fids[i]; intNID = Fld.getint (NULL); LOG.D ("DBG", Classtype.getsimplename ()+ " " +I+ ": " +Fld.getname ()+ "=" +NID); }       } Catch(Exception e) {Throw Newillegalargumentexception (); }     }   

Import Java.lang.reflect.Field;     ...       _dumpallresourceids (r.layout. class );       _dumpallresourceids (r.drawable. class);   

// Results R$layout 0:main=2130903040    1:small_spinner_dropdown_item=2130903041    0:icon= 2130837504  

Sometimes we need to dynamically get the ID of a control, and then do the operation, after searching the web, find a way

Getresources (). Getidentifier ("textView01", "id", "cn.xxx.xxx");

The first parameter is the ID name, the second is the resource attribute is the ID or the drawable, and the third is the package name.

A problem encountered during the project, read the image name from the database, and then call the picture. Directly with R.drawable.? cannot be called. Check a lot of places finally found a way to share to everyone, hope to help.
Mainly by two methods, individuals suggest the second kind.
1. Instead of placing the image under Res/drawable, it is stored in a SRC package (for example: Com.drawable.resource), in which case the call method is:
String Path = "Com/drawable/resource/imagename.png";
InputStream is = getClassLoader (). getResourceAsStream (path);
Drawable.createfromstream (IS, "src");

2. If you still want to use the image in res/drawable directly, you need to go through the following method:
Assuming that the project was created, the completed package name is: Com.test.image
int resID = Getresources (). Getidentifier ("ImageName", "drawable", "com.test.image");
drawable image = Getresources (). getdrawable (ResID);

This article transferred from: http://wen66.iteye.com/blog/1224201

android-using Getidentifier () to get the resource ID