android sdcard文件存储 + 媒体库更新方法 @ 自由手記

图片存储

if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
{

     if(image != null)
   {
      String sdardDir = Environment.getExternalStorageDirectory().toString();
            String name = sdardDir+"/appname/images/"+imagename+".jpg";
           java.io.File file = new java.io.File(sdardDir+"/appname/images");
           boolean bool = true;
           if(!file.isDirectory())
           {
                  bool = file.mkdirs() ;
           }

if(bool)

{

              File iamgeFile = new File(path);
         if(!iamgeFile.exists())
          {
              try {iamgeFile.createNewFile();} catch (IOException e1) {e1.printStackTrace();error= "1"+e1.toString(); }
           }
       FileOutputStream fOut = null;
         try { fOut = new FileOutputStream(iamgeFile);   } catch (FileNotFoundException e) { e.printStackTrace();
                 error= "2"+e.toString(); }
image.compress(Bitmap.CompressFormat.JPEG, 100, fOut); // png格式图片 image.compress(Bitmap.CompressFormat.png, 100, fOut);
            try { fOut.flush();    } catch (IOException e) {   e.printStackTrace();
             error="3"+ e.toString(); }
        try { fOut.close();} catch (IOException e) {    e.printStackTrace();
            error= "4"+e.toString(); }

}

else{

Toast t = Toast.makeText(this, "无sdcard", Toast.LENGTH_SHORT);
t.show();

}

媒体库更新

- 通过 Intent.ACTION_MEDIA_MOUNTED 进行全扫描
public void allScan(){
sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"
+ Environment.getExternalStorageDirectory())));
}

-  通过 Intent.ACTION_MEDIA_SCANNER_SCAN_FILE 扫描某个文件
public void fileScan(String fName){
      Uri data = Uri.parse("file:///"+fName);
      sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, data));
}

详细

http://wenku.baidu.com/view/537b9b8ecc22bcd126ff0c97.html

http://devbbs.doit.com.cn/viewthread.php?tid=31528

原文地址：http://hi.baidu.com/%CE%D2%D2%AA_%D1%A7_%CF%B0/blog/item/a108796d4a65f2eff636545c.html