Php 我试图在用户注册后登录用户,但我一直得到java.lang.NullPointerException
我正在尝试使用截击和发送POST请求来检查登录后的数据 我试图做的是在检查DonatorLogin中的验证之后,我想在DonatorLogin中创建API实例,并向服务器发送POSTrequest 这是我的AppController类Php 我试图在用户注册后登录用户,但我一直得到java.lang.NullPointerException,php,android,Php,Android,我正在尝试使用截击和发送POST请求来检查登录后的数据 我试图做的是在检查DonatorLogin中的验证之后,我想在DonatorLogin中创建API实例,并向服务器发送POSTrequest 这是我的AppController类 package ng.edu.saveasoul.app; import android.app.Application; import android.text.TextUtils; import com.android.volley.Request; imp
package ng.edu.saveasoul.app;
import android.app.Application;
import android.text.TextUtils;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;
public class AppController extends Application {
public static final String TAG = AppController.class.getSimpleName();
private RequestQueue mRequestQueue;
private static AppController mInstance;
@Override
public void onCreate() {
super.onCreate();
mInstance = this;
}
public static synchronized AppController getInstance() {
return mInstance;
}
public RequestQueue getRequestQueue() {
if (mRequestQueue == null) {
mRequestQueue = Volley.newRequestQueue(getApplicationContext());
}
return mRequestQueue;
}
public <T> void addToRequestQueue(Request<T> req, String tag) {
req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
getRequestQueue().add(req);
}
public <T> void addToRequestQueue(Request<T> req) {
req.setTag(TAG);
getRequestQueue().add(req);
}
public void cancelPendingRequests(Object tag) {
if (mRequestQueue != null) {
mRequestQueue.cancelAll(tag);
}
}
}
这是我的捐赠者登录
package ng.edu.saveasoul;
import androidx.appcompat.app.AppCompatActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import java.util.HashMap;
import java.util.Map;
import org.json.JSONException;
import org.json.JSONObject;
import android.widget.Toast;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import ng.edu.saveasoul.Helper.SessionManager;
import ng.edu.saveasoul.app.AppConfig;
import ng.edu.saveasoul.app.AppController;
public class DonatorLogin extends AppCompatActivity {
private static final String TAG = DonatorLogin.class.getSimpleName();
//initialize variable
EditText eMail, pword;
Button btnSubmit, btnSubmit2;
private ProgressDialog pDialog;
private SessionManager session;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_donator_login);
//assign variable
eMail = (EditText) findViewById(R.id.text1);
pword = (EditText) findViewById(R.id.text2);
btnSubmit = (Button) findViewById(R.id.b1);
btnSubmit2 = (Button) findViewById(R.id.b2);
pDialog = new ProgressDialog(this);
pDialog.setCancelable(false);
// Session manager
session = new SessionManager(getApplicationContext());
// Check if user is already logged in or not
if (session.isLoggedIn()) {
// User is already logged in. Take him to main activity
Intent intent = new Intent(DonatorLogin.this, DonatorProfile.class);
startActivity(intent);
finish();
}
//second button
btnSubmit2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//call activity page
openDonatorRegister();
}
});
//first button
btnSubmit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String email = eMail.getText().toString().trim();
String password = pword.getText().toString().trim();
// Check for empty data in the form
if (!email.isEmpty() && !password.isEmpty()) {
// login user
checkLogin(email, password);
} else {
// Prompt user to enter credentials
Toast.makeText(getApplicationContext(),
"Please enter the credentials!", Toast.LENGTH_LONG)
.show();
}
}
});
}
private void checkLogin(String email, String password) {
// Tag used to cancel the request
String tag_string_req = "req_register";
pDialog.setMessage("Registering ...");
showDialog();
StringRequest strReq = new StringRequest(Request.Method.POST,
AppConfig.URL_API, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Register Response: " + response.toString());
hideDialog();
try {
JSONObject jObj = new JSONObject(response);
boolean error = jObj.getBoolean("error");
if (!error) {
// User successfully stored in MySQL
String uid = jObj.getString("data");
String message = jObj.getString("message");
session.saveUserId(uid);
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();
// Launch login activity
Intent intent = new Intent(
DonatorLogin.this, DonatorProfile.class);
startActivity(intent);
finish();
} else {
// Error occurred in registration. Get the error
// message
String errorMsg = jObj.getString("message");
Toast.makeText(getApplicationContext(),
errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e)
{
e.printStackTrace();
}
}
}, new Response.ErrorListener()
{
@Override
public void onErrorResponse(VolleyError error)
{
Log.e(TAG, "Registration Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_LONG).show();
hideDialog();
}
}) { //api file //sending data to api
@Override
protected Map<String, String> getParams()
{
// Posting params to login url
Map<String, String> params = new HashMap<String, String>();
params.put("login", "login");//api action call
params.put("email", email);
params.put("password", password);
return params;
}
};
// Adding request to request queue
AppController.getInstance().addToRequestQueue(strReq, tag_string_req);
}
private void showDialog() {
if (!pDialog.isShowing())
pDialog.show();
}
private void hideDialog() {
if (pDialog.isShowing())
pDialog.dismiss();
}
//create method
public void openDonatorRegister()
{
//open the class you want to
Intent intent = new Intent(this, DonatorRegister.class);
startActivity(intent);
}
}
包ng.edu.saveasoul;
导入androidx.appcompat.app.appcompat活动;
导入android.app.ProgressDialog;
导入android.content.Intent;
导入android.os.Bundle;
导入android.util.Log;
导入android.view.view;
导入android.widget.Button;
导入android.widget.EditText;
导入java.util.HashMap;
导入java.util.Map;
导入org.json.JSONException;
导入org.json.JSONObject;
导入android.widget.Toast;
导入com.android.volley.Request;
导入com.android.volley.Response;
导入com.android.volley.VolleyError;
导入com.android.volley.toolbox.StringRequest;
导入ng.edu.saveasoul.Helper.SessionManager;
导入ng.edu.saveasoul.app.AppConfig;
导入ng.edu.saveasoul.app.AppController;
公共类DonatorLogin扩展了AppCompatActivity{
私有静态最终字符串标记=DonatorLogin.class.getSimpleName();
//初始化变量
编辑文本电子邮件,pword;
按钮btnSubmit,btnSubmit2;
私人对话;
私人会话管理器会话;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\u donator\u login);
//赋值变量
eMail=(EditText)findViewById(R.id.text1);
pword=(EditText)findViewById(R.id.text2);
btnSubmit=(按钮)findViewById(R.id.b1);
btnSubmit2=(按钮)findViewById(R.id.b2);
pDialog=新建进度对话框(此对话框);
pDialog.setCancelable(假);
//会话管理器
session=newsessionmanager(getApplicationContext());
//检查用户是否已登录
if(session.isLoggedIn()){
//用户已登录。请将其带到主活动
意向意向=新意向(DonatorLogin.this,DonatorProfile.class);
星触觉(意向);
完成();
}
//第二个按钮
btnSubmit2.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
//呼叫活动页面
openDonatorRegister();
}
});
//第一个按钮
btnSubmit.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
字符串email=email.getText().toString().trim();
字符串密码=pword.getText().toString().trim();
//检查表单中是否有空数据
如果(!email.isEmpty()&&!password.isEmpty()){
//登录用户
检查登录(电子邮件、密码);
}否则{
//提示用户输入凭据
Toast.makeText(getApplicationContext(),
“请输入凭据!”,Toast.LENGTH\u LONG)
.show();
}
}
});
}
私有void checkLogin(字符串电子邮件、字符串密码){
//用于取消请求的标记
String tag_String_req=“req_register”;
pDialog.setMessage(“注册…”);
showDialog();
StringRequest strReq=新的StringRequest(Request.Method.POST,
AppConfig.URL_API,新的Response.Listener(){
@凌驾
公共void onResponse(字符串响应){
Log.d(标记,“寄存器响应:+Response.toString());
hideDialog();
试一试{
JSONObject jObj=新的JSONObject(响应);
布尔错误=jObj.getBoolean(“错误”);
如果(!错误){
//用户成功存储在MySQL中
stringuid=jObj.getString(“数据”);
字符串消息=jObj.getString(“消息”);
saveUserId(uid);
Toast.makeText(getApplicationContext(),message,Toast.LENGTH_LONG.show();
//启动登录活动
意图=新意图(
DonatorLogin.this、DonatorProfile.class);
星触觉(意向);
完成();
}否则{
//注册时出错。获取错误信息
//信息
字符串errorMsg=jObj.getString(“消息”);
Toast.makeText(getApplicationContext(),
errorMsg,Toast.LENGTH_LONG).show();
}
}捕获(JSONException e)
{
e、 printStackTrace();
}
}
},new Response.ErrorListener()
{
@凌驾
公共无效onErrorResponse(截击错误)
{
Log.e(标记,“注册错误:+Error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(),Toast.LENGTH_LONG).show();
hideDialog();
}
}){//api文件//向api发送数据
@凌驾
受保护的映射getParams()
{
//将参数发布到登录url
Map params=新的HashMap();
put(“login”、“login”);//api操作调用
参数put(“电子邮件”,电子邮件);
参数put(“密码”,密码);
返回参数;
}
};
//将请求添加到请求队列
package ng.edu.saveasoul;
import androidx.appcompat.app.AppCompatActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import java.util.HashMap;
import java.util.Map;
import org.json.JSONException;
import org.json.JSONObject;
import android.widget.Toast;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import ng.edu.saveasoul.Helper.SessionManager;
import ng.edu.saveasoul.app.AppConfig;
import ng.edu.saveasoul.app.AppController;
public class DonatorLogin extends AppCompatActivity {
private static final String TAG = DonatorLogin.class.getSimpleName();
//initialize variable
EditText eMail, pword;
Button btnSubmit, btnSubmit2;
private ProgressDialog pDialog;
private SessionManager session;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_donator_login);
//assign variable
eMail = (EditText) findViewById(R.id.text1);
pword = (EditText) findViewById(R.id.text2);
btnSubmit = (Button) findViewById(R.id.b1);
btnSubmit2 = (Button) findViewById(R.id.b2);
pDialog = new ProgressDialog(this);
pDialog.setCancelable(false);
// Session manager
session = new SessionManager(getApplicationContext());
// Check if user is already logged in or not
if (session.isLoggedIn()) {
// User is already logged in. Take him to main activity
Intent intent = new Intent(DonatorLogin.this, DonatorProfile.class);
startActivity(intent);
finish();
}
//second button
btnSubmit2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//call activity page
openDonatorRegister();
}
});
//first button
btnSubmit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String email = eMail.getText().toString().trim();
String password = pword.getText().toString().trim();
// Check for empty data in the form
if (!email.isEmpty() && !password.isEmpty()) {
// login user
checkLogin(email, password);
} else {
// Prompt user to enter credentials
Toast.makeText(getApplicationContext(),
"Please enter the credentials!", Toast.LENGTH_LONG)
.show();
}
}
});
}
private void checkLogin(String email, String password) {
// Tag used to cancel the request
String tag_string_req = "req_register";
pDialog.setMessage("Registering ...");
showDialog();
StringRequest strReq = new StringRequest(Request.Method.POST,
AppConfig.URL_API, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Register Response: " + response.toString());
hideDialog();
try {
JSONObject jObj = new JSONObject(response);
boolean error = jObj.getBoolean("error");
if (!error) {
// User successfully stored in MySQL
String uid = jObj.getString("data");
String message = jObj.getString("message");
session.saveUserId(uid);
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();
// Launch login activity
Intent intent = new Intent(
DonatorLogin.this, DonatorProfile.class);
startActivity(intent);
finish();
} else {
// Error occurred in registration. Get the error
// message
String errorMsg = jObj.getString("message");
Toast.makeText(getApplicationContext(),
errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e)
{
e.printStackTrace();
}
}
}, new Response.ErrorListener()
{
@Override
public void onErrorResponse(VolleyError error)
{
Log.e(TAG, "Registration Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
error.getMessage(), Toast.LENGTH_LONG).show();
hideDialog();
}
}) { //api file //sending data to api
@Override
protected Map<String, String> getParams()
{
// Posting params to login url
Map<String, String> params = new HashMap<String, String>();
params.put("login", "login");//api action call
params.put("email", email);
params.put("password", password);
return params;
}
};
// Adding request to request queue
AppController.getInstance().addToRequestQueue(strReq, tag_string_req);
}
private void showDialog() {
if (!pDialog.isShowing())
pDialog.show();
}
private void hideDialog() {
if (pDialog.isShowing())
pDialog.dismiss();
}
//create method
public void openDonatorRegister()
{
//open the class you want to
Intent intent = new Intent(this, DonatorRegister.class);
startActivity(intent);
}
}
btnSubmit = (Button) findViewById(R.id.b1);
btnSubmit2 = (Button) findViewById(R.id.b2);