我正在学习如何构建Android应用程序,我正在尝试使用Java和PHP将值插入到我的数据库中。但NameValuePair给了我多个错误。
我已经导入了必要的文件。我做错了什么?
我的PHP文件:
$connect = mysqli_connect("localhost","root","","users");
if(mysqli_connect_errno($connect))
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
else
{
echo "success";
}
$username=$_REQUEST['username'];
$password=$_REQUEST['password'];
$result = mysql_query(" insert into users(username,password) values('$username','$password')" );
if($result == 1)
{
// successfully inserted
$response["success"] = 1;
$response["message"] = "User created.";
// echoing JSON response
echo json_encode($response);
}
else
{
// failed to insert row
$response["success"] = 0;
$response["message"] = "Oops! An error occurred.";
// echoing JSON response
echo json_encode($response);
}
Java XML:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.registro.MainActivity" >
<EditText
android:id="@+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/editText1"
android:layout_below="@+id/editText1"
android:layout_marginTop="70dp"
android:ems="10"
android:text="Password"
>
</EditText>
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginLeft="18dp"
android:layout_marginTop="18dp"
android:ems="10"
android:text="Username" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/editText2"
android:layout_below="@+id/editText2"
android:layout_marginTop="40dp"
android:text="Button"
android:onClick="create"
/>
</RelativeLayout>
主要活动文件
package com.example.registro;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import java.util.ArrayList;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
public class MainActivity extends ActionBarActivity {
private EditText usernameField,passwordField;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
usernameField = (EditText)findViewById(R.id.editText1);
passwordField = (EditText)findViewById(R.id.editText2);
}
public void create(){
String username = usernameField.getText().toString();
String password = passwordField.getText().toString();
// TODO Auto-generated method stub
HttpClient client = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://localhost/example/insert.php");
try
{
nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("username", username));
nameValuePairs.add(new BasicNameValuePair("password", password));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
response = httpclient.execute(httppost);
}
catch(Exception e)
{
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
答案 0 :(得分:0)
尝试更改
public void create(){
String username = usernameField.getText().toString();
String password = passwordField.getText().toString();
// TODO Auto-generated method stub
HttpClient client = new DefaultHttpClient();
HttpPost request = new HttpPost("http://localhost/example/insert.php");
try
{
List<NameValuePair> postparam = new ArrayList<NameValuePair>();
postparam.add(new BasicNameValuePair("username", username));
postparam.add(new BasicNameValuePair("password", password));
httppost.setEntity(new UrlEncodedFormEntity(postparam));
HttpResponse response = client.execute(request);
}
catch(Exception e)
{
e.printStackTrace();
}
}