Android 删除SD卡文件和文件及创建文件夹和文件

packagecom.jiub.client.mobile.addphoto;

 

importjava.io.File;

importjava.io.FileNotFoundException;

importjava.io.FileOutputStream;

importjava.io.IOException;

 

importandroid.graphics.Bitmap;

importandroid.os.Environment;

importandroid.util.Log;

 

publicclass FileUtils {

     

    publicstatic String SDPATH = Environment.getExternalStorageDirectory()

            +"/formats/";//获取文件夹

    //保存图片

    publicstatic void saveBitmap(Bitmap bm, String picName) {

        Log.e("","保存图片");

        Log.d("text", SDPATH);

        try{

            if(!isFileExist("")) {

                File tempf = createSDDir("");

            }

            File f = newFile(SDPATH, picName + ".JPEG");

            if(f.exists()) {

                f.delete();

            }

            FileOutputStream out = newFileOutputStream(f);

            bm.compress(Bitmap.CompressFormat.JPEG,90, out);

            out.flush();

            out.close();

            Log.e("","已经保存");

        }catch(FileNotFoundException e) {

            e.printStackTrace();

        }catch(IOException e) {

            e.printStackTrace();

        }

    }

 

    publicstatic File createSDDir(String dirName) throwsIOException {

        File dir = newFile(SDPATH + dirName);

        if(Environment.getExternalStorageState().equals(

                Environment.MEDIA_MOUNTED)) {

 

            System.out.println("createSDDir:"+ dir.getAbsolutePath());

            System.out.println("createSDDir:"+ dir.mkdir());

        }

        returndir;

    }

 

    publicstatic boolean isFileExist(String fileName) {

        File file = newFile(SDPATH + fileName);

        file.isFile();

        returnfile.exists();

    }

    //删除文件

    publicstatic void delFile(String fileName){

        File file = newFile(SDPATH + fileName);

        if(file.isFile()){

            file.delete();

        }

        file.exists();

    }

    //删除文件夹和文件夹里面的文件

    publicstatic void deleteDir() {

        File dir = newFile(SDPATH);

        if(dir == null|| !dir.exists() || !dir.isDirectory())

            return;

         

        for(File file : dir.listFiles()) {

            if(file.isFile())

                file.delete();// 删除所有文件

            elseif (file.isDirectory())

                deleteDir();// 递规的方式删除文件夹

        }

        dir.delete();// 删除目录本身

    }

 

    publicstatic boolean fileIsExists(String path) {

        try{

            File f = newFile(path);

            if(!f.exists()) {

                returnfalse;

            }

        }catch(Exception e) {

 

            returnfalse;

        }

        returntrue;

    }

 

}