我是android开发的新手。在我的应用程序中，我有一个登录页面，我想通过POST方法实现身份验证功能。我有一个根地址，我必须通过该地址登录。我正在提供一个示例网址，因为它是保密的。 “test.sample.com”。我的Protol地址是https。然后我需要首先结合“/ login”。在使用此登录进行身份验证之后。我有更多api像“/ api / users”，“api / image”。如果我使用登录功能进行身份验证，我只能访问此API。我怎样才能做到这一点。到目前为止，我已经创建了一个登录页面，但此时我还没有在这里实现任何POST方法。
public class LoginPage extends AppCompatActivity{
private UserLoginTask mAuthTask = null;
private static final String TAG = "LoginActivity";
private AutoCompleteTextView userEmail;
private EditText userPassword;
private TextView forgotPassword;
private Button login;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
//Set up the login form
userEmail=(AutoCompleteTextView) findViewById(R.id.email);
userPassword=(EditText)findViewById(R.id.password);
forgotPassword=(TextView)findViewById(R.id.forgot_password);
forgotPassword.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(getBaseContext(),"Redirect to forgot password link", Toast.LENGTH_SHORT).show();
}
});
userPassword.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView textView, int id, KeyEvent keyEvent) {
if (id == R.id.password || id == EditorInfo.IME_NULL) {
attemptLogin();
return true;
}
return false;
}
});
login=(Button)findViewById(R.id.btn_login);
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
attemptLogin();
}
});
}
/**
* Attempts to sign in or register the account specified by the login form.
* If there are form errors (invalid email, missing fields, etc.), the
* errors are presented and no actual login attempt is made.
*/
private void attemptLogin() {
if (mAuthTask != null) {
return;
}
// Reset errors.
userEmail.setError(null);
userPassword.setError(null);
String email = userEmail.getText().toString();
String password = userPassword.getText().toString();
boolean cancel = false;
View focusView = null;
// Check for a valid password, if the user entered one.
if (!TextUtils.isEmpty(password) && !isPasswordValid(password)) {
userPassword.setError(getString(R.string.error_invalid_password));
focusView = userPassword;
cancel = true;
}
else if(TextUtils.isEmpty(password)){
userPassword.setError(getString(R.string.error_field_required));
focusView = userPassword;
cancel = true;
}
// Check for a valid email address.
if (TextUtils.isEmpty(email)) {
userEmail.setError(getString(R.string.error_field_required));
focusView = userEmail;
cancel = true;
} else if (!isEmailValid(email)) {
userEmail.setError(getString(R.string.error_invalid_email));
focusView = userEmail;
cancel = true;
}
if (cancel) {
// There was an error; don't attempt login and focus the first
// form field with an error.
focusView.requestFocus();
} else {
// Show a progress spinner, and kick off a background task to
// perform the user login attempt.
mAuthTask = new UserLoginTask(email,password,this);
mAuthTask.execute((Void) null);
}
}
private boolean isEmailValid(String email) {
//TODO: Replace this with other logic
/*attern pattern = Patterns.EMAIL_ADDRESS;
return pattern.matcher(email).matches();*/
return true;
}
private boolean isPasswordValid(String password) {
//TODO: Replace this with your own logic
return password.length() > 4;
}
/**
* Represents an asynchronous login/registration task used to authenticate
* the user.
*/
public boolean isReachable(String address, int port, int timeoutMs) {
try {
Socket sock = new Socket();
SocketAddress sockaddr = new InetSocketAddress(address, port);
sock.connect(sockaddr, timeoutMs); // this will block no more than timeoutMs
sock.close();
return true;
} catch (IOException e) { return false; }
}
public class UserLoginTask extends AsyncTask<Void, Void, Boolean> {
private final String mEmail;
private final String mPassword;
boolean result = false;
Activity instance ;
UserLoginTask(String email, String password , Activity instance) {
mEmail = email;
mPassword = password;
this.instance = instance ;
}
@Override
protected Boolean doInBackground(Void... params) {
// TODO: attempt authentication against a network service.
authenticateUsingServer(mEmail,mPassword);
// TODO: register the new account here.
return true;
}
@Override
protected void onPostExecute(final Boolean success) {
mAuthTask = null;
if (success) {
finish();
Intent loginIntent = new Intent(LoginActivity.this, DummyActivity.class);
startActivity(loginIntent);
} else {
userEmail.setError(getString(R.string.error_incorrect_password));
userPassword.requestFocus();
}
}
}
public boolean authenticateUsingServer(final String mEmail, final String mPassword){
boolean result=false ;
try {
if(isReachable("8.8.8.8", 53, 1000)){
Log.e(TAG,"Authenticate using remote server");
// Instantiate the RequestQueue.
RequestQueue queue = Volley.newRequestQueue(LoginActivity.this);
StringRequest strReq = new StringRequest(Request.Method.POST,
"https://app.com/login", new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.e(TAG, "Login Response: " + response);
//parse your response here
result = true;
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Login Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_LONG).show();
}
}){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Log.e(TAG,"Inside getParams");
// Posting parameters to login url
Map<String, String> params = new HashMap<>();
params.put("email", mEmail);
params.put("password", mPassword);
return params;
}
};
// Adding request to request queue
queue.add(strReq);
Thread.sleep(2000);
}
else{
Log.e(TAG,"Internet connection is required.");
/*Toast.makeText(LoginActivity.this,"Internet connectivity is required",
Toast.LENGTH_LONG).show();*/
result = false;
// TODO: exit the application
}
} catch (InterruptedException e) {
return false;
}
return result;
}
}
答案 0 :(得分：0)
使用以下代码替换您的LoginTask：
public class UserLoginTask extends AsyncTask<Void, Void, Boolean> {
private final String mEmail;
private final String mPassword;
Activity instance ;
UserLoginTask(String email, String password , Activity instance) {
mEmail = email;
mPassword = password;
this.instance = instance ;
}
@Override
protected Boolean doInBackground(Void... params) {
// TODO: attempt authentication against a network service.
JSONObject request = new JSONObject();
request.put("email",mEmail );
request.put("pass",mPassword );
String result = connectWithServer(instance , request);
if(!TextUtils.isEmpty(result)){
return true;
}else{
return false;
}
}
@Override
protected void onPostExecute(final Boolean success) {
mAuthTask = null;
showProgress(true);
if (success) {
finish();
Intent loginIntent = new Intent(LoginPage.this, MainActivity.class);
startActivity(loginIntent);
} else {
userEmail.setError(getString(R.string.error_incorrect_password));
userPassword.requestFocus();
}
}
@Override
protected void onCancelled() {
mAuthTask = null;
showProgress(false);
}
}
在Actvity类中添加connectWithServer（）方法：
public static String connectWithServer(Activity ctx , JSONObject request) {
String result ="";
try {
//Connect
HttpURLConnection urlConnection = (HttpURLConnection) ((new URL(YOUR_SERVICE_URL)).openConnection());
urlConnection.setDoOutput(true);
urlConnection.setRequestProperty("Content-Type", "application/json");
urlConnection.setRequestProperty("Accept", "application/json");
urlConnection.setRequestMethod("POST");
urlConnection.connect();
urlConnection.setConnectTimeout(100000);
//Write
OutputStream outputStream = urlConnection.getOutputStream();
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
writer.write(request.toString());
writer.close();
outputStream.close();
//Read
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), "UTF-8"));
String line = null;
StringBuilder sb = new StringBuilder();
while ((line = bufferedReader.readLine()) != null) {
sb.append(line);
}
bufferedReader.close();
result = sb.toString();
} catch (UnsupportedEncodingException e){
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}catch (JSONException e){
e.printStackTrace();
}
return result;
}
答案 1 :(得分：0)
这里使用：
首先检查互联网是否可用。
public boolean isReachable(String address, int port, int timeoutMs) {
try {
Socket sock = new Socket();
SocketAddress sockaddr = new InetSocketAddress(address, port);
sock.connect(sockaddr, timeoutMs); // this will block no more than timeoutMs
sock.close();
return true;
} catch (IOException e) { return false; }
}
然后使用排球库来点击请求：
public boolean authenticateUsingServer(final String mEmail, final String mPassword){
try {
if(isReachable("8.8.8.8", 53, 1000)){
Log.e(TAG,"Authenticate using remote server");
// Instantiate the RequestQueue.
RequestQueue queue = Volley.newRequestQueue(LoginActivity.this);
StringRequest strReq = new StringRequest(Request.Method.POST,
URL_LOGIN, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.e(TAG, "Login Response: " + response);
//parse your response here
result = true;
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e(TAG, "Login Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_LONG).show();
}
}){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Log.e(TAG,"Inside getParams");
// Posting parameters to login url
Map<String, String> params = new HashMap<>();
params.put("email", mEmail);
params.put("password", mPassword);
return params;
}
};
// Adding request to request queue
queue.add(strReq);
Thread.sleep(2000);
}
else{
Log.e(TAG,"Internet connection is required.");
/*Toast.makeText(LoginActivity.this,"Internet connectivity is required",
Toast.LENGTH_LONG).show();*/
result = false;
// TODO: exit the application
}
} catch (InterruptedException e) {
return false;
}
return result;
}
然后从Async任务中调用它：
@Override
protected Boolean doInBackground(Void... params) {
// TODO: attempt authentication against a network service.
authenticateUsingServer(mEmail,mPassword);
// TODO: register the new account here.
return true;
}