基于Bmob平台的账户登录、文件上传及下载逻辑的实现
最近有时间研究了一下Bmob平台的后台数据处理，确实是为应用开发者省去了许多麻烦，让不懂服务器开发的也可以做出棒棒的网络交互应用。
好记性不如烂笔头啊，代码备份一下~
BmobUser实现用户登录和注册：
注册和登录不需要自定义数据表，后台默认—User数据表来保存账户信息（用户名、密码、邮箱、手机）
登录逻辑：
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private
void
login() {
final
ProgressDialog progress =
new
ProgressDialog(MainActivity.
this
);
progress.setMessage(
"登录ing>->->"
);
progress.setCanceledOnTouchOutside(
false
);
progress.show();
BmobUser.loginByAccount(
this
,
"account"
,
"password"
,
new
LogInListener
@Override
public
void
done(Users users, BmobException e) {
progress.dismiss();
if
(e !=
null
){
Toast.makeText(MainActivity.
this
,
"登录失败：code="
+e.getErrorCode()+
"，错误描述："
+e.getLocalizedMessage(), Toast.LENGTH_LONG).show();
}
else
{
Toast.makeText(MainActivity.
this
,
"登录成功！"
, Toast.LENGTH_LONG).show();
}
}
});
}
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private
void
registerUser() {
String account = et_account.getText().toString();
String password = et_password.getText().toString();
String confirmpassword = et_confirmpwd.getText().toString();
if
(TextUtils.isEmpty(account)){
Toast.makeText(RegisterActivity.
this
,
"用户名不可为空"
, Toast.LENGTH_SHORT).show();
return
;
}
if
(TextUtils.isEmpty(password)){
Toast.makeText(RegisterActivity.
this
,
"密码不可以为空"
, Toast.LENGTH_SHORT).show();
return
;
}
if
(!password.equals(confirmpassword)){
Toast.makeText(RegisterActivity.
this
,
"密码不相同"
, Toast.LENGTH_SHORT).show();
return
;
}
final
ProgressDialog progress =
new
ProgressDialog(RegisterActivity.
this
);
progress.setMessage(
"注册ing>->->"
);
progress.setCanceledOnTouchOutside(
false
);
progress.show();
final
Users user =
new
Users();
user.setUsername(account);
user.setPassword(password);
user.signUp(
this
,
new
SaveListener() {
@Override
public
void
onSuccess() {
progress.dismiss();
Toast.makeText(RegisterActivity.
this
,
"成功啦"
,Toast.LENGTH_LONG).show();
Intent intent =
new
Intent(RegisterActivity.
this
,MainActivity.
class
);
intent.putExtra(
"from"
,
"login"
);
startActivity(intent);
finish();
}
@Override
public
void
onFailure(
int
i, String s) {
Toast.makeText(RegisterActivity.
this
,
"注册失败：code="
+i+
"，错误描述："
+s,Toast.LENGTH_LONG).show();
}
});
}
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文件上传及下载实现：
其中上传的文件可以在Bmob控制台-文件选项下进行查看，上传和下载的重点是：上传完成后在onSuccess中会返回所上传文件的url，下载时同样也是需要传入文件的下载地址url。一般在同时实现上传文件和其他类型数据时是先实现文件上传然后在在onSuccess中继续实现数据上传的逻辑，最好是在上传数据时将返回的url一起保存。
文件上传逻辑：
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private
void
upload() {
File f =
new
File(Environment.getExternalStorageDirectory()+
"/image/test.jpg"
);
final
BmobFile file =
new
BmobFile(f);
file.upload(MainActivity.
this
,
new
UploadFileListener() {
@Override
public
void
onSuccess() {
// TODO Auto-generated method stub
url = file.getUrl();
Toast.makeText(MainActivity.
this
,
"上传成功"
, Toast.LENGTH_SHORT).show();
}
@Override
public
void
onFailure(
int
arg0, String arg1) {
// TODO Auto-generated method stub
Toast.makeText(MainActivity.
this
,
"上传失败"
+arg1, Toast.LENGTH_SHORT).show();
}
});
}
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private
void
downLoad(){
new
Thread(
new
Runnable() {
@Override
public
void
run() {
// TODO Auto-generated method stub
Looper.prepare();
try
{
Bitmap bitmap1=
null
;
URL myUrl;
myUrl =
new
URL(url);
HttpURLConnection conn=(HttpURLConnection)myUrl.openConnection();
conn.setConnectTimeout(
5000
);
conn.connect();
InputStream is=conn.getInputStream();
bitmap1=BitmapFactory.decodeStream(is);
//把bitmap转成圆形
BitmapUtil bmuUtil =
new
BitmapUtil(MainActivity.
this
);
mBitmap = bmuUtil.toRoundBitmap(bitmap1);
is.close();
Message msg = mhandler.obtainMessage(
1
, mBitmap);
mhandler.sendMessage(msg);
}
catch
(MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch
(IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Looper.loop();
}
}).start();
}
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