使用Android studio，我创建了一个Activity，其中有2个按钮和2个editText。 用户输入姓名和姓氏，然后按下两个按钮之一，一个用于注册，另一个用于登录。
根据用户按下的按钮，他将被定向到另一个活动。
我只想在一个按钮中使用2个注册和登录按钮。
即，用户输入他/她的姓名，如果输入的信息在数据库中然后登录，否则通过将数据保存在数据库中来保存
AndroidStudio文件是：
数据库信息：
表名：UserTable
表字段：id，nome，cognome
我希望你能帮助我，我很感激。
下面我会告诉你我的代码。
-HttpParse.java
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
/**
* Created by Juned on 3/3/2017.
*/
public class HttpParse {
String FinalHttpData = "";
String Result ;
BufferedWriter bufferedWriter ;
OutputStream outputStream ;
BufferedReader bufferedReader ;
StringBuilder stringBuilder = new StringBuilder();
URL url;
public String postRequest(HashMap<String, String> Data, String HttpUrlHolder) {
try {
url = new URL(HttpUrlHolder);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setReadTimeout(14000);
httpURLConnection.setConnectTimeout(14000);
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoInput(true);
httpURLConnection.setDoOutput(true);
outputStream = httpURLConnection.getOutputStream();
bufferedWriter = new BufferedWriter(
new OutputStreamWriter(outputStream, "UTF-8"));
bufferedWriter.write(FinalDataParse(Data));
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
if (httpURLConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
bufferedReader = new BufferedReader(
new InputStreamReader(
httpURLConnection.getInputStream()
)
);
FinalHttpData = bufferedReader.readLine();
}
else {
FinalHttpData = "Something Went Wrong";
}
} catch (Exception e) {
e.printStackTrace();
}
return FinalHttpData;
}
public String FinalDataParse(HashMap<String,String> hashMap2) throws UnsupportedEncodingException {
for(Map.Entry<String,String> map_entry : hashMap2.entrySet()){
stringBuilder.append("&");
stringBuilder.append(URLEncoder.encode(map_entry.getKey(), "UTF-8"));
stringBuilder.append("=");
stringBuilder.append(URLEncoder.encode(map_entry.getValue(), "UTF-8"));
}
Result = stringBuilder.toString();
return Result ;
}
}
MainActivity.java：
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import java.net.FileNameMap;
import java.util.HashMap;
public class MainActivity extends AppCompatActivity {
Button register, LogIn, tutto;
EditText First_Name, Last_Name ;
String F_Name_Holder, L_Name_Holder;
String finalResult ;
String HttpURLRegister = "http://oae.altervista.org/DB/registrazione.php";
String HttpURLLogin = "http://oae.altervista.org/DB/login.php";
Boolean CheckEditText ;
ProgressDialog progressDialog;
HashMap<String,String> hashMap = new HashMap<>();
HttpParse httpParse = new HttpParse();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//REGISTRATION
//Assign Id'S
First_Name = (EditText)findViewById(R.id.name);
Last_Name = (EditText)findViewById(R.id.surname);
//REGISTRATION
register = (Button)findViewById(R.id.buttonReg);
//LOGIN
LogIn = (Button)findViewById(R.id.buttonLog);
//REGISTRATION
//Adding Click Listener on button.
register.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Checking whether EditText is Empty or Not
CheckEditTextIsEmptyOrNot();
if(CheckEditText){
// If EditText is not empty and CheckEditText = True then this block will execute.
UserRegisterFunction(F_Name_Holder,L_Name_Holder);
}
else {
// If EditText is empty then this block will execute.
Toast.makeText(MainActivity.this, "Please fill all form fields.", Toast.LENGTH_LONG).show();
}
}
});
//LOGIN
LogIn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
CheckEditTextIsEmptyOrNot();
if(CheckEditText){
UserLoginFunction(F_Name_Holder, L_Name_Holder);
}
else {
Toast.makeText(MainActivity.this, "Please fill all form fields.", Toast.LENGTH_LONG).show();
}
}
});
}
//REGISTRAZIONE
public void CheckEditTextIsEmptyOrNot(){
F_Name_Holder = First_Name.getText().toString();
L_Name_Holder = Last_Name.getText().toString();
if(TextUtils.isEmpty(F_Name_Holder) || TextUtils.isEmpty(L_Name_Holder) )
{
CheckEditText = false;
}
else {
CheckEditText = true ;
}
}
//REGISTRATION
@RequiresApi(api = Build.VERSION_CODES.CUPCAKE)
public void UserRegisterFunction(final String F_Name, final String L_Name){
class UserRegisterFunctionClass extends AsyncTask<String,Void,String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog = ProgressDialog.show(MainActivity.this,"Loading Data",null,true,true);
}
@Override
protected void onPostExecute(String httpResponseMsg) {
super.onPostExecute(httpResponseMsg);
progressDialog.dismiss();
Toast.makeText(MainActivity.this,httpResponseMsg.toString(), Toast.LENGTH_LONG).show();
if(httpResponseMsg.equalsIgnoreCase("Registration Successfully")){
finish();
Intent intent = new Intent(MainActivity.this, RegisterActivity.class);
startActivity(intent);
}
}
//REGISTRATION
@Override
protected String doInBackground(String... params) {
hashMap.put("f_name",params[0]);
hashMap.put("L_name",params[1]);
finalResult = httpParse.postRequest(hashMap, HttpURLRegister);
return finalResult;
}
}
UserRegisterFunctionClass userRegisterFunctionClass = new UserRegisterFunctionClass();
userRegisterFunctionClass.execute(F_Name,L_Name);
}
public void UserLoginFunction(final String F_name, final String L_name){
class UserLoginClass extends AsyncTask<String,Void,String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog = ProgressDialog.show(MainActivity.this,"Loading Data",null,true,true);
}
@Override
protected void onPostExecute(String httpResponseMsg) {
super.onPostExecute(httpResponseMsg);
progressDialog.dismiss();
if(httpResponseMsg.equalsIgnoreCase("Data Matched")){
finish();
Intent intent = new Intent(MainActivity.this, LoginActivity.class);
startActivity(intent);
}
else{
Toast.makeText(MainActivity.this,httpResponseMsg,Toast.LENGTH_LONG).show();
}
}
@Override
protected String doInBackground(String... params) {
hashMap.put("f_name",params[0]);
hashMap.put("L_name",params[1]);
finalResult = httpParse.postRequest(hashMap, HttpURLLogin);
return finalResult;
}
}
UserLoginClass userLoginClass = new UserLoginClass();
userLoginClass.execute(F_name,L_name);
}
}
Activity_Main.xml：
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="visible"
tools:context="com.example.bruzi.db4.MainActivity">
<Button
android:id="@+id/buttonReg"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="32dp"
android:layout_marginStart="32dp"
android:layout_marginTop="50dp"
android:background="@color/colorAccent"
android:text="Register"
android:textColor="@android:color/background_light"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/surname" />
<EditText
android:id="@+id/surname"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="32dp"
android:layout_marginStart="32dp"
android:layout_marginTop="32dp"
android:ems="10"
android:hint="Surname"
android:inputType="textPersonName"
android:textAlignment="center"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/name" />
<EditText
android:id="@+id/name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="32dp"
android:layout_marginStart="32dp"
android:layout_marginTop="48dp"
android:ems="10"
android:hint="Name"
android:inputType="textPersonName"
android:textAlignment="center"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/buttonLog"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="32dp"
android:layout_marginStart="32dp"
android:layout_marginTop="32dp"
android:background="@color/colorAccent"
android:text="Login"
android:textColor="@android:color/background_light"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/buttonReg" />
</android.support.constraint.ConstraintLayout>
RegisterActivity.java和LoginActivity.java它们是空的，因为我只是在该活动的.xml文件中放置了一个Text View。
Register.php
<?php
if($_SERVER['REQUEST_METHOD']=='POST'){
include 'db4config.php';
$con = mysqli_connect($HostName,$HostUser,$HostPass,$DatabaseName);
$F_name = $_POST['f_name'];
$L_name = $_POST['L_name'];
$CheckSQL = "SELECT * FROM UserTable WHERE nome='$F_name'";
$check = mysqli_fetch_array(mysqli_query($con,$CheckSQL));
if(isset($check)){
echo 'Email Already Exist';
}
else{
$Sql_Query = "INSERT INTO UserLoginTable (nome,cognome) values ('$F_name','$L_name')";
if(mysqli_query($con,$Sql_Query))
{
echo 'Registration Successfully';
}
else
{
echo 'Something went wrong';
}
}
}
mysqli_close($con);
?>
的login.php
<?php
if($_SERVER['REQUEST_METHOD']=='POST'){
include 'db4config.php';
$con = mysqli_connect($HostName,$HostUser,$HostPass,$DatabaseName);
$F_name = $_POST['f_name'];
$L_name = $_POST['L_name'];
$Sql_Query = "select * from UserTable where nome = '$F_name' and cognome = '$L_name' ";
$check = mysqli_fetch_array(mysqli_query($con,$Sql_Query));
if(isset($check)){
echo "Data Matched";
}
else{
echo "Invalid Username or Password Please Try Again";
}
}else{
echo "Check Again";
}
mysqli_close($con);
?>
db4config.php
<?php
//Define your host here.
$HostName = "DB4";
//Define your database username here.
$HostUser = "oae";
//Define your database password here.
$HostPass = "*********";
//Define your database name here.
$DatabaseName = "my_oae";
?>
答案 0 :(得分：0)
每当用户按下按钮时，您必须首先检查这是否是现有用户。如果他然后登录他，否则首先将他的信息保存到db然后登录。