File file=newFile(Environment.getExternalStorageDirectory(), name);

                                                 try{

                                                           FileOutputStream   fos=newFileOutputStream(file);

                                                           fos.write(content.getBytes());

                                                           fos.close();

                                                              Toast.makeText(getApplicationContext(), "保存成功", 200).show();

                                                 }  catch(Exception e) {

                                                              Toast.makeText(getApplicationContext(), "保存失败", 200).show();

                                                           e.printStackTrace();

                                                 }

File file=newFile(Environment.getExternalStorageDirectory(), name);

                                                 try{

                                                           FileOutputStream   fos=newFileOutputStream(file);

                                                           fos.write(content.getBytes());

                                                           fos.close();

                                                              Toast.makeText(getApplicationContext(), "保存成功", 200).show();

                                                 }  catch(Exception e) {

                                                              Toast.makeText(getApplicationContext(), "保存失败", 200).show();

                                                           e.printStackTrace();

                                                 }

      btn_ok.setOnClickListener(newOnClickListener() {

                             @Override

                             publicvoidonClick(View v) {

                                                 String  user = et_user.getText().toString().trim();

                                                 String  pwd = et_pwd.getText().toString().trim();

                                                 if(user.isEmpty()||pwd.isEmpty()){

                                                           Toast.makeText(getApplicationContext(), "不能为空", 200).show();

                                                           //获取编辑器

                                                    Editor edit = sp.edit();

                                                                //保存数据

                                                    edit.putString("name", user);

                                                    edit.putString("pwd", pwd);

                                                    //提交保存

                                                    edit.commit();  

                                                 }                                

                             }

                   });