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我正在运行一个Android应用程序连接与MySQL，我使用PHP文件登录和注册用户，我已经添加到数据库的数据，我是试图使用这些细节进行登录。Android doInBackground任务没有运行...但预执行运行
我有一个名为Background worker的不同类来做asynctask。 doInBackground任务不运行，但预执行任务在应用程序中运行。
这些都是登录并存储在本地主机的PHP寄存器文件......
<?php
require "conn.php";
$user_name = "user_name";
$user_pass = "password";
$mysql_query = "select * from users where Email like '$user_name' and Password like '$user_pass'";
$result = mysqli_query($conn, $mysql_query);
if(mysqli_num_rows($result) > 0){
echo "login success";
}
else {
echo "login not success";
}
?>
Register.php
<?php
require "conn.php";
$name = "name";
$user_name = "user_name";
$user_pass = "password";
$cpass = "cpass";
$mysql_query = "insert into users (Name,Email,Password,ConfirmPass) values ('$name','$user_name','$user_pass','$cpass')";
if($conn->query($mysql_query) === TRUE){
echo "You have successfully registered!";
}
else {
echo "Register failed";
}
$conn->close();
?>
这是在我的Android页面Login.java：
package com.example.user.smartkitchen;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
public class Login extends AppCompatActivity {
public Button login,loginResetPass,RegisterLinkButton;
EditText UserNameTxt, PasswordTxt;
//private FirebaseAuth auth;
public static final String Email = "Email";
public ImageButton exit;
//private ProgressBar progressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/*auth = FirebaseAuth.getInstance();
if (auth.getCurrentUser() != null) {
startActivity(new Intent(Login.this, MainActivity.class));
finish();
}
*/
setContentView(R.layout.activity_login);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
UserNameTxt = (EditText) findViewById(R.id.UserNameTxt);
PasswordTxt = (EditText) findViewById(R.id.PasswordTxt);
//progressBar = (ProgressBar) findViewById(R.id.progressBar);
login = (Button) findViewById(R.id.login);
RegisterLinkButton = (Button) findViewById(R.id.RegisterLinkButton);
RegisterLinkButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(Login.this, Register.class));
}
});
}
public void onLogin(View view) {
String username = UserNameTxt.getText().toString();
String password = PasswordTxt.getText().toString();
String type = "login";
BackgroundWorker backgroundWorker = new BackgroundWorker(this);
backgroundWorker.execute(type,username,password);
}
/* loginResetPass = (Button) findViewById(R.id.loginResetPass);
//Get Firebase auth instance
auth = FirebaseAuth.getInstance();
loginResetPass.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(Login.this, forgotPassword.class));
}
});
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final String email = UserNameTxt.getText().toString();
final String password = PasswordTxt.getText().toString();
String emailPattern = "[a-zA-Z0-9._-][email protected][a-z]+\\.+[a-z]+";
if (TextUtils.isEmpty(email)) {
Toast.makeText(getApplicationContext(), "Enter email address!", Toast.LENGTH_SHORT).show();
return;
}
if (email.matches(emailPattern))
{
Toast.makeText(getApplicationContext(),"valid email address",Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(getApplicationContext(),"Invalid email address", Toast.LENGTH_SHORT).show();
}
if (TextUtils.isEmpty(password)) {
Toast.makeText(getApplicationContext(), "Enter password!", Toast.LENGTH_SHORT).show();
return;
}
//progressBar.setVisibility(View.VISIBLE);
//authenticate user
auth.signInWithEmailAndPassword(email, password)
.addOnCompleteListener(Login.this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
// If sign in fails, display a message to the user. If sign in succeeds
// the auth state listener will be notified and logic to handle the
// signed in user can be handled in the listener.
//progressBar.setVisibility(View.GONE);
if (!task.isSuccessful()) {
// there was an error
if (password.length() < 6) {
PasswordTxt.setError(getString(R.string.minimum_password));
} else {
Toast.makeText(Login.this, getString(R.string.auth_failed), Toast.LENGTH_LONG).show();
}
} else {
Intent intent = new Intent(Login.this, Home.class);
intent.putExtra("Email", email);
startActivity(intent);
finish();
}
}
});
}
});
}
public void onExitTapped(View view) {
exit = (ImageButton) findViewById(R.id.exit);
finish();
}
*/
}
这是我的后台辅助类：
package com.example.user.smartkitchen;
import android.app.AlertDialog;
import android.content.Context;
import android.os.AsyncTask;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
/**
* Created by User on 8/6/2017.
*/
public class BackgroundWorker extends AsyncTask<String,Void,String> {
Context context;
AlertDialog alertDialog;
BackgroundWorker (Context ctx){
context = ctx;
}
@Override
protected String doInBackground(String... params) {
String type = params[0];
String login_URL = "http://192.168.1.7/login.php";
String register_URL = "http://192.168.1.7/register.php";
if(type.equals("login")){
try {
String user_name = params[1];
String password = params[2];
URL url = new URL(login_URL);
HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
OutputStream outputStream = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
String post_data = URLEncoder.encode("user_name", "UTF-8")+"="+URLEncoder.encode(user_name, "UTF-8")+"&"+URLEncoder.encode("password", "UTF-8")+"="+URLEncoder.encode(password, "UTF-8");
bufferedWriter.write(post_data);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "iso-8859-1"));
String result="";
String line="";
while ((line = bufferedReader.readLine())!=null){
result +=line;
}
bufferedReader.close();
inputStream.close();
httpURLConnection.disconnect();
return result;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
} else if(type.equals("register")){
try {
String name = params[1];
String user_name = params[2];
String password = params[3];
String cpass = params[4];
URL url = new URL(register_URL);
HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
OutputStream outputStream = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
String post_data1 = URLEncoder.encode("name", "UTF-8")+"="+URLEncoder.encode(name, "UTF-8")+"&" +
URLEncoder.encode("user_name", "UTF-8")+"="+URLEncoder.encode(user_name, "UTF-8")+"&" +
URLEncoder.encode("password", "UTF-8")+"="+URLEncoder.encode(password, "UTF-8")+"&"
+URLEncoder.encode("cpass", "UTF-8")+"="+URLEncoder.encode(cpass, "UTF-8");
bufferedWriter.write(post_data1);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "iso-8859-1"));
String result="";
String line="";
while ((line = bufferedReader.readLine())!=null){
result +=line;
}
bufferedReader.close();
inputStream.close();
httpURLConnection.disconnect();
return result;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPreExecute() {
alertDialog = new AlertDialog.Builder(context).create();
alertDialog.setTitle("Login Status");
}
@Override
protected void onPostExecute(String result) {
alertDialog.setMessage(result);
alertDialog.show();
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}
我得到标题集的警告对话框，但成功的消息不出现，是PHP页面不运行？有人可以帮助吗？
你可以把一些日志和调试指针来检查时，代码被切换到后台方法会发生什么。它是否甚至没有进入第一线或停止在别的地方？ –
如果警报栏显示它意味着onPostExecute（）正在工作，也doInBackground（）。因为你有调用alertDialog.show（）; onPostExecute（）中的 –