How to Get Image using Name from Raw or drawable folder in Android.

ImageView mIv = (ImageView) findViewById(R.id.xidIma);

 // create context Object for  to Fetch  image from resourse

   Context mContext=getApplicationContext();

 // getResources().getIdentifier("image_name","res_folder_name", package_name);

 // find out below example

inti=mContext.getResources().getIdentifier("ic_launcher","raw",mContext.getPackageName());

 // now we will get contsant id for that image 

 mIv.setBackgroundResource(i);

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Check Sdcard is available in device in Android

*Check Whether Sd card is available on Device*

       public boolean isSDCardMounted()

             {

              return android.os.Environment.getExternalStorageState().equals(

                                 android.os.Environment.MEDIA_MOUNTED);

             }

             if(isSDCardMounted)

             {

                    //you code here...

             }

             else

             {

                    //No sdcard

             }

*Create Folder in Sdcard*

           File SDCardRoot = Environment.getExternalStorageDirectory();

            SDCardRoot = new File(SDCardRoot,"FolderName");

            if (!SDCardRoot.exists())

            {

                  SDCardRoot.mkdir();

            }

*Create File in Sdcard*

            file = new File(SDCardRoot,filename);

            if(file.createNewFile())

            {

                  file.createNewFile();

            }

Permission:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

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