Android 资源操作

1.获取设备中的文本文件，该文件在raw目录下面。

  String getStringFromAssetFile(Context activity)  throws IOException   {       AssetManager am = activity.getAssets();       InputStream is = am.open("test.txt");       String s = convertStreamToString(is);       is.close();       return s;   }

2.同样获取资源的方式，如下所示：

public void testRawFile(){try{String s = getStringFromRawFile(this.mContext);this.reportString(s);}catch(Throwable t){this.reportString("error:" + t.getMessage());}}private String getStringFromRawFile(Context activity)   throws IOException   {      Resources r = activity.getResources();      InputStream is = r.openRawResource(R.raw.test);      String myText = convertStreamToString(is);      is.close();      return myText;   }   private String convertStreamToString(InputStream is) throws IOException   {      ByteArrayOutputStream baos = new ByteArrayOutputStream();      int i = is.read();      while (i != -1)      {         baos.write(i);         i = is.read();      }      return baos.toString();   }

这样方式同方式一差不多，读取的都是同一个文件。

3.读取XML文件，如下所示：

public void testXML(){try{String x = getEventsFromAnXMLFile(this.mContext);reportString(x); }catch(Throwable t){reportString("error reading xml file:" + t.getMessage());}}private String getEventsFromAnXMLFile(Context activity)throws XmlPullParserException, IOException{   StringBuffer sb = new StringBuffer();   Resources res = activity.getResources();   XmlResourceParser xpp = res.getXml(R.xml.test);      xpp.next();   int eventType = xpp.getEventType();    while (eventType != XmlPullParser.END_DOCUMENT)     {        if(eventType == XmlPullParser.START_DOCUMENT)         {           sb.append("******Start document");        }         else if(eventType == XmlPullParser.START_TAG)         {           sb.append("\nStart tag "+xpp.getName());        }         else if(eventType == XmlPullParser.END_TAG)         {           sb.append("\nEnd tag "+xpp.getName());        }         else if(eventType == XmlPullParser.TEXT)         {           sb.append("\nText "+xpp.getText());        }        eventType = xpp.next();    }//eof-while    sb.append("\n******End document");    return sb.toString();}//eof-function

XML文件如下所示：

         Hello World from an xml sub element

4.android上的颜色.

在 strings.xml文件中申明，

#f00#0000ff#f0f0#ffffff00

然后在JAVA中使用，如下

public void testColor(){Resources res = this.mContext.getResources();int mainBackGroundColor      =  res.getColor(R.color.main_back_ground_color);reportString("mainBackGroundColor:" + mainBackGroundColor);}

5.测试图片

 private void testImage()    {    //Call getDrawable to get the image    Drawable d = getResources().getDrawable(R.drawable.sample_image);    //You can use the drawable then to set the background    this.getTextView().setBackgroundDrawable(d);      //or you can set the background directly from the Resource Id    this.getTextView().setBackgroundResource(R.drawable.sample_image);    }

6.测试Drawable

#f00#0000ff#f0f0

  private void testColorDrawables()    {    // Get a drawable    ColorDrawable redDrawable =     (ColorDrawable)    getResources().getDrawable(R.drawable.red_rectangle);    //Set it as a background to a text view    this.getTextView().setBackgroundDrawable(redDrawable);    }

7.测试Shape

my_rounded_rectangle.xml,如下所示：

圆角文本框效果：

 private void testShape()    {    // Get a drawable    GradientDrawable roundedRectangle =     (GradientDrawable)    getResources().getDrawable(R.drawable.my_rounded_rectangle);    //Set it as a background to a text view    this.getTextView().setBackgroundDrawable(roundedRectangle);        }

8. 测试Array数组

onetwothree

private void reportArray(int arrayId){Resources res = this.mContext.getResources();String strings[] = res.getStringArray(arrayId);for (String s: strings){this.mReportTo.reportBack(tag, s);}}

完.....

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