Android---Read system resource function getresources () Summary

Turn http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2012/1201/655.html

I. Basic INTRODUCTION

Packet Package:android.content.res
Main categories: Resources
InputStream openrawresource (int id) gets the data stream of the resource, reads the resource data
Put a picture resource, add your file to your project in the res/drawable/directory, you can reference it in the code or XML layout, you can also use the resource number, such as you choose a file as long as the suffix is removed (for example: Mm_image.png refers to it is mm_ Image).
When you need to use the XML resources, you can use Context.getresources (). getdrawable (R .... The address of the resource such as: R.string.ok);
When you do not have a context parameter inside your method, you can This.getcontext (). Getresources (); that's it.
Here is a detailed description of the usage scenario:

1, need to use GetResource () must pay attention to
Must have a context, this General Service or activity is
Can be used as a member variable to construct an incoming or method parameter pass in.


2. When referencing an XML file, you may pass:
Getresources (). GETXML () Gets the XML original file and then obtains the Xmlresourceparser object
Xmlresourceparser XRP = Mres.getxml (r.xml.personal);

The use of R .... You can specify an XML file under the folder to load using

3, some other file read method
A, put the resource files under the/raw/raw of the application, then you can use Getresources in the application to get the resources,

Open this file with the Openrawresource method (resource file name without suffix)

Resources myresources = Getresources ();    InputStream myFile = Myresources.openrawresource (r.raw.xx_filename);

Like normal Java programs, Android provides the Openfileinput and Openfileoutput methods to read files on the device

InputStream fs =this. Getresources (). Openrawresource (r.raw.index.htm); (The resource file is named index.html and does not require a suffix.    htm) New InputStreamReader (FS, "Utf-8");     New BufferedReader (read);

b, read PNG or BMP in the res/drawable directory

// get the Resources    object  This . GetContext (). Getresources ();     // read a resource    in a data flow way InputStream is = R.openrawresource (r.drawable.mm_image);     New bitmapdrawable (IS);     = Bmpdraw.getbitmap ();

If you need to take advantage of the picture decoder, use as follows:

InputStream is = getresources (). Openrawresource (R.drawable.icon);     = Bitmapfactory.decodestream (is);     New Paint ();     Mpaint);

Note When using GetResource ()

1, must have the context Ah 2, can be used as a member variable, construct incoming or method parameters passed in. You can do it.

Android---Read system resource function getresources () Summary