-1
所以我試圖上傳一些數據到MySQL。我相信我有效地將LoginActivity.java中的電子郵件的價值傳遞給了PartySetup.java，但是這個值顯然在這個過程中丟失了。我試着用相同的結果使用sharedPreferences。有沒有人有任何想法，爲什麼發生這種情況？謝謝！Android - 獲取未定義的索引JSONException，但我不知道爲什麼
LoginActivity.java：
public class LoginActivity extends AppCompatActivity{
public static ArrayList<String> emailSaver = new ArrayList<String>();
@Override
protected void onCreate(Bundle savedInstancedState){
super.onCreate(savedInstancedState);
setContentView(R.layout.activity_login);
final EditText tempEmail = (EditText) findViewById(R.id.email);
final EditText tempPassword = (EditText) findViewById(R.id.password);
final Button loginButton = (Button) findViewById(R.id.btnLogin);
final Button toRegisterScreen = (Button) findViewById(R.id.btnLinkToRegisterScreen);
if (SaveSharedPreference.getUserName(LoginActivity.this).length() != 0){
// If the user's already been logged in, skip the login screen
Intent intent = new Intent(LoginActivity.this, OneTimeWelcome.class);
startActivity(intent);
finish();
}
toRegisterScreen.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
Intent registerIntent = new Intent(LoginActivity.this, RegisterActivity.class);
LoginActivity.this.startActivity(registerIntent);
}
});
loginButton.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
final String email = tempEmail.getText().toString();
emailSaver.add(0, email);
final String password = tempPassword.getText().toString();
//Response received from the server
Response.Listener<String> responseListener = new Response.Listener<String>(){
@Override
public void onResponse(String response){
try{
Log.i("TAG", response);
JSONObject jsonResponse = new JSONObject(response);
boolean success = jsonResponse.getBoolean("success");
if(success){
String name = jsonResponse.getString("name");
Intent intent = new Intent(LoginActivity.this, OneTimeWelcome.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.putExtra("name", name);
intent.putExtra("email", email);
LoginActivity.this.startActivity(intent);
finish();
}
else{
AlertDialog.Builder builder = new AlertDialog.Builder(LoginActivity.this);
builder.setMessage("Login Failed")
.setNegativeButton("Retry", null)
.create()
.show();
}
}
catch(JSONException e){
e.printStackTrace();
}
SaveSharedPreference.setUserName(LoginActivity.this, email);
}
};
LoginRequest loginRequest = new LoginRequest(email, password, responseListener);
RequestQueue queue = Volley.newRequestQueue(LoginActivity.this);
queue.add(loginRequest);
}
});
}
}
PartySetup.java：
public class PartySetup extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
private GoogleApiClient mGoogleApiClient;
private Location location;
private TextView tempLatitude;
private TextView tempLongitude;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_party_setup);
final EditText tempPartyName = (EditText) findViewById(R.id.party_name);
final EditText tempHostName = (EditText) findViewById(R.id.host_name);
final Button startParty = (Button) findViewById(R.id.create_party);
final CheckBox locationButton = (CheckBox) findViewById(R.id.set_location);
tempLatitude = (TextView) findViewById(R.id.latitude_text);
tempLongitude = (TextView) findViewById(R.id.longitude_text);
if (mGoogleApiClient == null) {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
mGoogleApiClient.connect();
startParty.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
if (locationButton.isChecked() && tempPartyName != null){
final String partyName = tempPartyName.getText().toString();
final String hostName;
if (tempHostName == null){
hostName = "";
}
else hostName = tempHostName.getText().toString();
final String latitude = tempLatitude.getText().toString();
final String longitude = tempLongitude.getText().toString();
final String publicEmail = LoginActivity.emailSaver.get(0);
Response.Listener<String> responseListener = new Response.Listener<String>(){
@Override
public void onResponse(String response){
try{
Log.i("TAG", response);
JSONObject jsonResponse = new JSONObject(response);
boolean success = jsonResponse.getBoolean("success");
if(success){
Intent intent = new Intent(PartySetup.this, HomePage.class);
startActivity(intent);
}
else{
AlertDialog.Builder builder = new AlertDialog.Builder(PartySetup.this);
builder.setMessage("Invalid Party Nickname")
.setNegativeButton("Try Again", null)
.create()
.show();
}
} catch (JSONException e){
e.printStackTrace();
}
}
};
CreatePartyRequest createPartyRequest = new CreatePartyRequest(partyName, hostName, latitude, longitude, publicEmail, responseListener);
RequestQueue queue = Volley.newRequestQueue(PartySetup.this);
queue.add(createPartyRequest);
}
else {
AlertDialog.Builder builder = new AlertDialog.Builder(PartySetup.this);
builder.setMessage("Please check the location box")
.setNegativeButton("Try Again", null)
.create()
.show();
}
}
});
}
protected void onStart() {
mGoogleApiClient.connect();
super.onStart();
}
protected void onStop() {
mGoogleApiClient.disconnect();
super.onStop();
}
@Override
public void onConnected(@Nullable Bundle bundle) {
try{
location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
}
catch (SecurityException e){
e.printStackTrace();
}
if (location != null){
tempLatitude.setText(String.valueOf(location.getLatitude()));
tempLongitude.setText(String.valueOf(location.getLongitude()));
}
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
}
CreatePartyRequest.java：
public class CreatePartyRequest extends StringRequest {
private static final String CREATE_PARTY_REQUEST_URL = "http://10.0.2.2:8080/android_login_api/create_party_request.php";
private Map<String, String> params;
public CreatePartyRequest(String partyName, String hostName, String latitude, String longitude, String email, Response.Listener<String> listener){
super(Method.POST, CREATE_PARTY_REQUEST_URL, listener, null);
params = new HashMap<>();
params.put("partyName", partyName);
params.put("hostName", hostName);
params.put("latitude", latitude);
params.put("longitude", longitude);
params.put("user", email);
}
@Override
public Map<String, String> getParams(){
return params;
}
}
create_party_request.php：
<?php
$con = mysqli_connect("127.0.0.1" , "(my username)" , "(my password)" , "android_api");
$partyName = $_POST["partyName"];
$hostName = $_POST["hostName"];
$latitude = $_POST["latitude"];
$longitude = $_POST["longitude"];
$publicEmail = $_POST["publicEmail"];
global $con, $partyName, $hostName, $latitude, $longitude;
$statement = mysqli_prepare($con, "INSERT INTO parties (party_name, host_name, latitude, longitude, email) VALUES (?, ?, ?, ?, ?)");
mysqli_stmt_bind_param($statement, "sssss", $partyName, $hostName, $latitude, $longitude, $publicEmail);
mysqli_stmt_execute($statement);
mysqli_stmt_close($statement);
$response = array();
$response["success"] = true;
echo json_encode($response);
?>
請注意，我的sql表中的字段是party_name，host_name，緯度，經度，用戶。
這是我收到的錯誤。該日誌已有點切斷，但正如標題所說，對變量publicEmail一個未定義的索引錯誤在PHP的第9行：
哪一行你得到錯誤？ – Sush
對不起 - 錯誤是在線9 –
發佈錯誤日誌 – Sush