仅意图在一个活动中给出错误的意图中获取数据
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我正在尝试从适配器中传递意图并将其加入我的活动中。
当我每次这样做时，它都会处于else状态。
它没有得到值，我也不是为什么。当我在任何其他活动中尝试相同的代码时，它工作得很好，但是在此活动中，它总是给出null意图价值。
我知道如何获得和传递意图的答案很多，但就我而言，它在一项活动中不起作用，我也不知道为什么。
我的适配器类：
holder.getSurvey.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
Intent intent = new Intent(context,AuthorMainScreen.class);
intent.putExtra("work", "getting");
context.startActivity(intent);
我的AuthorMainScreen活动：
public class AuthorMainScreen extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener
Button newSurveyBtn, surveyWithRef, surveyResult;
ArrayList<JSONObject> jsonObjects = new ArrayList<JSONObject>();
public static TextView textView;
DatabaseReference databaseReference, surveyReference;
String referenceNo, loggedInUserId;
AlertDialog dialog;
ProgressDialog progressDialog;
DrawerLayout drawerLayout;
NavigationView navigationView;
LinearLayout linearLayout;
FirebaseAuth firebaseAuth;
TextView headerEmailView, rateOk;
Button headerLogout;
EditText reference;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_author_navigation);
progressDialog = new ProgressDialog(this);
progressDialog.setMessage("Processing your request...");
viewDeclaration();
clickFunctionalities();
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawerLayout, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawerLayout.setDrawerListener(toggle);
toggle.syncState();
// drawerLayout.addDrawerListener(actionBarDrawerToggle);
navigationView.setNavigationItemSelectedListener(this);
private void clickFunctionalities()
newSurveyBtn.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
surveyTitleDialog();
);
surveyWithRef.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
referenceDialog();
rateOk.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
referenceNo = reference.getText().toString().trim();
if (!referenceNo.isEmpty())
progressDialog.show();
getSurvey();
dialog.dismiss();
else
progressDialog.dismiss();
reference.setError("Reference # is required");
);
);
surveyResult.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
referenceDialog();
rateOk.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
referenceNo = reference.getText().toString().trim();
if (!referenceNo.isEmpty())
progressDialog.show();
getSurveyResultFile();
dialog.dismiss();
else
progressDialog.dismiss();
reference.setError("Reference # is required");
);
);
linearLayout.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
if (drawerLayout.isDrawerOpen(GravityCompat.START))
drawerLayout.closeDrawer(GravityCompat.START);
else
drawerLayout.openDrawer(GravityCompat.START);
);
headerLogout.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
FirebaseAuth.getInstance().signOut();
Intent intent = new Intent(AuthorMainScreen.this, LoginSignupActivity.class);
startActivity(intent);
finish();
);
private void surveyTitleDialog()
final AlertDialog.Builder textBuilder = new AlertDialog.Builder(this);
LayoutInflater inflater = this.getLayoutInflater();
View view = inflater.inflate(R.layout.survey_name_dialog, null);
final EditText surveyName = view.findViewById(R.id.edt_set_survey_name);
TextView ok = view.findViewById(R.id.survey_name_btn);
ok.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
String surveyTitleName = surveyName.getText().toString().trim();
if (!surveyTitleName.equals(""))
dialog.dismiss();
Intent intent = new Intent(AuthorMainScreen.this, MakeSurvey.class);
intent.putExtra("surveyname", surveyTitleName);
Toast.makeText(AuthorMainScreen.this, surveyTitleName, Toast.LENGTH_SHORT).show();
startActivity(intent);
else
surveyName.setError("Title is Required");
);
TextView cancelBtn = view.findViewById(R.id.dismiss_dialog);
cancelBtn.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
dialog.dismiss();
);
textBuilder.setView(view);
dialog = textBuilder.create();
dialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
dialog.show();
Window window = dialog.getWindow();
window.setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
dialog.setCancelable(false);
private void getSurvey()
surveyReference = FirebaseDatabase.getInstance().getReference().child(Constants.content).child(Constants.survey).child(referenceNo);
surveyReference.addValueEventListener(new ValueEventListener()
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot)
System.out.println(dataSnapshot);
if (dataSnapshot.hasChildren())
progressDialog.dismiss();
Intent intent = new Intent(getApplicationContext(), GetSurveys.class);
intent.putExtra(Constants.ref_no, referenceNo);
startActivity(intent);
else
progressDialog.dismiss();
Toast.makeText(getApplicationContext(), "Reference number is not valid !!!", Toast.LENGTH_LONG).show();
@Override
public void onCancelled(@NonNull DatabaseError databaseError)
progressDialog.dismiss();
Toast.makeText(getApplicationContext(), "Something went wrong!!!", Toast.LENGTH_SHORT).show();
);
public void getSurveyResultFile()
databaseReference = FirebaseDatabase.getInstance().getReference().child(Constants.content).child(Constants.Answers).child(loggedInUserId).child(referenceNo);
databaseReference.addValueEventListener(new ValueEventListener()
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot)
if (dataSnapshot.exists())
progressDialog.dismiss();
JSONArray dataSnapshotArray = new JSONArray();
JSONArray dataSnapshotChildrenArray;
JSONObject dataSnapshotChildrenAnswer;
JSONArray dataSnapshotChildrenAnswerValues;
for (DataSnapshot ds : dataSnapshot.getChildren())
System.out.println("sdsd" + ds);
dataSnapshotChildrenArray = new JSONArray();
ArrayList<Object> list = (ArrayList<Object>) ds.getValue();
for (int i = 0; i < list.size(); i++)
HashMap<String, Object> map = (HashMap<String, Object>) list.get(i);
Iterator<Map.Entry<String, Object>> finalIterator = map.entrySet().iterator();
dataSnapshotChildrenAnswer = new JSONObject();
while (finalIterator.hasNext())
Map.Entry<String, Object> entry = finalIterator.next();
Object value = entry.getValue();
String key = entry.getKey();
try
dataSnapshotChildrenAnswer.put(key, value);
if (value instanceof ArrayList)
dataSnapshotChildrenAnswerValues = new JSONArray();
ArrayList<String> answers = (ArrayList<String>) value;
for (int j = 0; j < answers.size(); j++)
dataSnapshotChildrenAnswerValues.put(answers.get(j));
dataSnapshotChildrenAnswer.put(key, dataSnapshotChildrenAnswerValues);
catch (JSONException e)
e.printStackTrace();
dataSnapshotChildrenArray.put(dataSnapshotChildrenAnswer);
dataSnapshotArray.put(dataSnapshotChildrenArray);
System.out.println("jso " + dataSnapshotArray);
try
saveCsv(dataSnapshotArray);
catch (IOException e)
e.printStackTrace();
catch (JSONException e)
e.printStackTrace();
else
Toast.makeText(AuthorMainScreen.this, "Sorry!!user or survey not found.", Toast.LENGTH_LONG).show();
progressDialog.dismiss();
@Override
public void onCancelled(@NonNull DatabaseError databaseError)
);
public void saveCsv(JSONArray outerArray) throws IOException, JSONException
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
if (checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)
ActivityCompat.requestPermissions(this, new String[]Manifest.permission.WRITE_EXTERNAL_STORAGE, 1);
String fileName = referenceNo + " Result";
String rootPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/test/";
File dir = new File(rootPath);
if (!dir.exists())
dir.mkdir();
File file = null;
file = new File(rootPath, fileName);
if (!file.exists())
progressDialog.dismiss();
file.createNewFile();
if (file.exists())
progressDialog.dismiss();
CSVWriter writer = new CSVWriter(new FileWriter(file), ',');
for (int i = 0; i < outerArray.length(); i++)
JSONArray innerJsonArray = (JSONArray) outerArray.getJSONArray(i);
for (int k = 0; k < innerJsonArray.length(); k++)
String[][] arrayOfArrays = new String[innerJsonArray.length()][];
JSONObject innerJsonObject = (JSONObject) innerJsonArray.getJSONObject(k);
String[] stringArray1 = new String[innerJsonObject.length()];
// stringArray1[0]= (String) innerJsonObject.getString("type");
stringArray1[1] = "Questions";
stringArray1[2] = "Answers";
stringArray1[1] = (String) innerJsonObject.getString("title");
stringArray1[2] = "";
JSONArray jsonArray = (JSONArray) innerJsonObject.getJSONArray("answer");
for (int j = 0; j < jsonArray.length(); j++)
stringArray1[2] += jsonArray.get(j).toString();
stringArray1[2] += ",";
arrayOfArrays[k] = stringArray1;
writer.writeNext(arrayOfArrays[k]);
System.out.println("aa " + Arrays.toString(arrayOfArrays[k]));
writer.close();
Toast.makeText(this, fileName + " is been saved at " + rootPath, Toast.LENGTH_LONG).show();
public void referenceDialog()
final AlertDialog.Builder rateBuilder = new AlertDialog.Builder(this);
LayoutInflater inflater = this.getLayoutInflater();
View view = inflater.inflate(R.layout.survey_refno_dialog, null);
reference = view.findViewById(R.id.edt_survey_ref_no);
rateOk = view.findViewById(R.id.ref_btnOk);
TextView rateCancel = view.findViewById(R.id.ref_btnCancel);
rateBuilder.setView(view);
rateCancel.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
dialog.dismiss();
);
dialog = rateBuilder.create();
dialog.show();
Window rateWindow = dialog.getWindow();
rateWindow.setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
dialog.setCancelable(false);
private void viewDeclaration()
newSurveyBtn = findViewById(R.id.new_surveys_button);
surveyWithRef = findViewById(R.id.get_survey_button);
surveyResult = findViewById(R.id.analyze_survey);
linearLayout = findViewById(R.id.hamburg_icon_layout);
drawerLayout = findViewById(R.id.drawer_layout);
navigationView = findViewById(R.id.navigation_view);
View view = navigationView.getHeaderView(0);
headerEmailView = view.findViewById(R.id.header_email);
headerLogout = findViewById(R.id.nav_logout);
firebaseAuth = FirebaseAuth.getInstance();
if (firebaseAuth.getCurrentUser() != null)
String userEmail = firebaseAuth.getCurrentUser().getEmail();
headerEmailView.setText(userEmail);
if (firebaseAuth.getCurrentUser() != null && firebaseAuth.getCurrentUser().getUid() != null)
loggedInUserId = firebaseAuth.getCurrentUser().getUid();
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem menuItem)
switch (menuItem.getItemId())
case R.id.menu_share:
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_SUBJECT, "DataPro");
intent.putExtra(Intent.EXTRA_TEXT, Constants.shareMessage);
startActivity(Intent.createChooser(intent, "Share Via"));
drawerLayout.closeDrawer(GravityCompat.START);
break;
case R.id.menu_survey_count:
startActivity(new Intent(getApplicationContext(), UserAllSurveys.class));
drawerLayout.closeDrawer(GravityCompat.START);
break;
case R.id.menu_new_instruments:
startActivity(new Intent(getApplicationContext(), CreateInstrument.class));
drawerLayout.closeDrawer(GravityCompat.START);
break;
case R.id.menu_about_us:
Toast.makeText(getApplicationContext(), "About us", Toast.LENGTH_SHORT).show();
drawerLayout.closeDrawer(GravityCompat.START);
break;
return true;
@Override
protected void onStart()
super.onStart();
Intent intent = getIntent();
/*if (intent.hasExtra("work") )
String k = getIntent().getStringExtra("work");
Toast.makeText(this, k, Toast.LENGTH_SHORT).show();
else
Toast.makeText(this, "eroor" , Toast.LENGTH_SHORT).show();
*/
Bundle bundle = getIntent().getExtras();
if (bundle != null )
String k = bundle.getString("work");
Toast.makeText(this, k, Toast.LENGTH_SHORT).show();
else
Toast.makeText(this, "error" , Toast.LENGTH_SHORT).show();
@Override
public void onBackPressed()
super.onBackPressed();
答案
尝试这样
Bundle bundle = getIntent().getExtras();
if (bundle != null )
String k = bundle.getString("work");
Toast.makeText(this, k, Toast.LENGTH_SHORT).show();
else
Toast.makeText(this, "error" , Toast.LENGTH_SHORT).show();
另一答案
您是否有另一个具有相同类名但包名称不同的类？因为您的接收方活动（AuthorMainScreen）中似乎没有多余的参数。有时这样的错误比其他逻辑错误要花更多的时间。或者您也可以通过注释其余代码来尝试在onCreate（）上调用它。
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