I'm new to Android Studio and Java, currently I'm learning about intents and sending data/text from one activity to another. On the second activity I get "Cannot resolve symbol 'intent'" even though it's in onCreate field. What I'm trying to do is to have two text fields for first and last name, sending the text from first activity to the second one which will read it, and all done with onButtonClick method. I'm only trying to do the first name and the code looks like this MainAcitivty
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void onButtonClicked(View view) {
EditText nameText = (EditText)findViewById(R.id.firstName);
TextView messageText = (TextView) findViewById(R.id.messageTextView);
if(nameText.getText().toString().trim().length() == 0){
messageText.setText("text here");
} else {
String textForSecondAcitivity = "your name is: " + nameText.getText();
Intent intent = new Intent(this, SecondActivity.class);
intent.putExtra(Intent.EXTRA_TEXT, textForSecondAcitivity);
startActivity(intent);
`
The problem is the second Activity that gives me the error "Cannot resolve symbol 'intent'". And here is the code:
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
public class SecondActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
Intent scIntent = getIntent();
String messageText = intent.getStringExtra("EXTRA_TEXT");
TextView messageView = (TextView)findViewById(R.id.textView);
messageView.setText(messageText);
}
It wont show the error here but it's int this line
String messageText = intent.getStringExtra("EXTRA_TEXT");
I apologize in advance because surely I messed up something bad, I'm a beginner and if you have some advice on what's the best way to do what I'm actually trying to accomplish feel free to tell me.
The app should look like this in the end 1.The first activity
1.The second one showing first name and last name
You have no local variable named intent
Replace it with scIntent
Here you are making it wrong
intent.putExtra(Intent.EXTRA_TEXT, textForSecondAcitivity);
instead you use this
intent.putExtra("EXTRA_TEXT", textForSecondAcitivity);
Related
I'm a beginner in android studio and i want to write a code with 3 activities.
1st is for starting the app.2nd is for showing an English word and 3rd is for showing the English word and a description of it in two texts.
I want to transfer data of English word itself and its description and the number of the word to show the words one by one.
I wrote the code with help of tutorial clips but it ain't work and in 3rd activity shows nothing.
these are my codes:
main activity:
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void start(View view)
{
Intent i = new Intent(this,ActivityOne.class);
startActivity(i);
}
}
ActivityOne
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class ActivityOne extends AppCompatActivity {
int a=0;
String E , P;
private Button show;
private TextView Eword;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_one);
Eword = (TextView) findViewById(R.id.Eword);
show = (Button) findViewById(R.id.show);
}
public void show(View view)
{
Intent intent = new Intent(this,ActivityTwo.class);
startActivity(intent);
int a = getIntent().getIntExtra("counter",0);
Eword.setText(Eng[a]);
E = Eword.getText().toString();
P = Fa[a];
a++;
intent.putExtra("counter",a);
intent.putExtra("EWord",E);
intent.putExtra("PWord",P);
}
private String[] Eng = {
"Abundance",
"Anxiety",
"Bruxism",
"Discipline",
"Drug Addiction"
};
private String[] Fa = {
"Abundance Description",
"Anxiety Description",
"Bruxism Description",
"Discipline Description",
"Drug Addiction Description"
};
}
ActivityTwo
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;
public class ActivityTwo extends AppCompatActivity {
TextView Eng , Fa;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_two);
Eng = (TextView) findViewById(R.id.eng);
Fa = (TextView) findViewById(R.id.fa);
// recieve data from activity one
String EWord = getIntent().getStringExtra("EWord");
String PWord = getIntent().getStringExtra("PWord");
int a = getIntent().getIntExtra("counter",0);
Eng.setText(EWord);
Fa.setText(PWord);
}
public void iknow(View view)
{
Intent myIntent = new Intent(this,ActivityOne.class);
startActivity(myIntent);
int a = getIntent().getIntExtra("counter",0);
myIntent.putExtra("counter",a);
}
public void idknow(View view)
{
Intent myIntentTwo = new Intent(this,ActivityOne.class);
startActivity(myIntentTwo);
int a = getIntent().getIntExtra("counter",0);
myIntentTwo.putExtra("counter",a);
}
}
And it shows this result:
It is the third activity and it can clear the pretext that was set in design page but can not replace EWord or PWord
Can someone help me?????
(1) To get you started, you need to put your variables into the intent before you start the activity. (2). I don't think its a good idea to have activity one start two, which then can start one. It is better to just close second activity which then automatically returns to one. (3) To pass data back to the activity you are returning you need to startActivityForResult https://developer.android.com/training/basics/intents/result.html
activity one starts activity two using startActivityForResult. Activity Two returns an intent (which is the result intent) and activity one recieves this in onActivityResult.
check out this: Android: how to make an activity return results to the activity which calls it?
I am trying to finish off the first tutorial in the Android Studio documentation, but I can't even seem to do that.
I keep getting a:
Error:(17, 60) error: cannot find symbol variable EXTRA_MESSAGE
Here is the code to my DisplayMessageActivity.java file:
package com.example.myfirstapp;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.ViewGroup;
import android.widget.TextView;
public class DisplayMessageActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_message);
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
ViewGroup layout = (ViewGroup) findViewById(R.id.activity_display_message);
layout.addView(textView);
}
}
The tutorial I am trying to follow is here:
https://developer.android.com/training/basics/firstapp/starting-activity.html
There is no static variable with name EXTRA_MESSAGE. Add public static String EXTRA_MESSAGE = <Some Message String>. And this error will be resolved
There is no static variable with name EXTRA_MESSAGE. Add public static String EXTRA_MESSAGE = .
Hi I have been racking my brain for hours, did research online but nobody seems to have an answer. My emulator was running my code no problem then I ran it again and I get "Session 'MainActivity': error". I looked through this main activity about 10 times but there is no error sign anywhere and it looks like it should be working fine, I mean it was working before no problem. So I'm not sure if there really is a problem I don't see that Android Studio is not pointing out properly or if this is a different problem all together.
Any help would be greatly appreciated. Thank you.
package tekvision.codedecrypter;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.Toast;
import gameInfo.GameDatabase;
public class MainActivity extends ActionBarActivity {
//Runs before the application is created
private Button mCampaignButton;
private final Context context = this;
//When the application is created
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Instantiate a GameDatabase object (this activity)
final GameDatabase gDB = new GameDatabase(context);
gDB.fillGameDatabase();
//Keeps screen on so it doesn't fall asleep
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
//Finding button by button id after application is created
mCampaignButton = (Button)findViewById(R.id.campaignButtonID);
//Checks if the campaign button is clicked
mCampaignButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String ans = gDB.getAnswer("Ancient",1);
//Toast pop up message
Toast toast = Toast.makeText(getApplicationContext(),
ans ,
Toast.LENGTH_SHORT);
toast.show();
//Intent to go from main activity to campaign Level Select Activity
final Intent intent = new Intent(MainActivity.this, CampaignSelectLevel.class);
startActivity(intent);
}
});
}
}
Try rebuilding and cleaning your project.
Build > Rebuild Project
and
Build > Clean Project
so I've been going through a beginner's guide for creating Android Applications (http://developer.android.com/training/basics/firstapp/index.html). It has worked fine except for one step which I keep getting errors at.
The MainActivity.java does not work for me. I am getting errors of all kinds on 3 different places.
This is what my code looks like:
package com.fredde.myfirstapp;
public class MainActivity extends Activity {
public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
import android.app.Activity;enter code here
import android.content.Intent;
import android.view.View;
import android.widget.EditText;
import android.view.View;
/** Called when the user clicks the Send button */
public void sendMessage(View view) {
Intent intent = new Intent(this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
So I'm hoping that someone who has gone through this guide can help me out, or just someone who can see what's wrong despite not having done this particular project. Thanks in advance!
Go easy on me, I'm a complete beginner.
import statements should be out of the class.
package com.fredde.myfirstapp;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.widget.EditText;
import android.view.View;
public class MainActivity extends Activity {
public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
/** Called when the user clicks the Send button */
public void sendMessage(View view) {
Intent intent = new Intent(this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
For your main activity:
Intent intent = new Intent(this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
the following has to be defined in strings.xml under res->values->
<resources>
...
<string name="title_activity_display_message">My Message</string>
</resources>
for R can not be resolved:
make sure you have defined edit_message as an id for edit view in your xml file like the following:
<EditText android:id="#+id/edit_message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="#string/edit_message" />
this should solve your problem
Ok, so after copying G V's code there is only one error left: On this
line ditText editText = (EditText) findViewById(R.id.edit_message); it
says "R cannot be resolved to a variable"
Clean the project and then build it again.
You need to call onCreate and inside, setCustomView, to inflate a layout to that activity.
#override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setCustomView(R.layout.yourLayoutXMLfile);
}
If you do not write this the app doesn't know where to find objects like EditText, etc.
I just compiled the following and didn't get any errors.
This is what I did, under onCreate method..
setCustomView(R.layout.file.xml);
for this create a file called file.xml under res->layout->file.xml.
I assigned an id for Edit view in the xml like :`
<EditText
android:id="#+id/edit_mssg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/msg"/>
I am sure you have a java file called DisplayMesageActivity.java
package com.fredde.myfirstapp;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.widget.EditText;
import android.view.View;
public class MainActivity extends Activity {
public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
#override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setCustomView(R.layout.file.xml);
}
/** Called when the user clicks the Send button */
public void sendMessage(View view) {
Intent intent = new Intent(this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById(R.id.edit_mssg);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
Ive got my email intent working well as in it posts emails. Im now getting an issue where once I click 'send email' on my custom template, which sets the 'To', 'subject' and 'message' fields of the GMail template it loads fine but then when i click 'send' on the GMail template it loops back to the custom template. As shown:
This is my custom made email template:
Once 'send email' is clicked then the Gmail template is loaded:
Once the 'Send' button of the GMail template is cliked it loops back to the custom template and they loop between each other continuously. Hoping someone can give me an idea of how I can stop this looping!
Here is my code with my intent within the 'onClick':
package com.example.flybase2;
import android.app.Activity;
import android.app.Dialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class ContactsEmail extends Activity implements OnClickListener{
String emailPassed;
String emailAdd;
String emailSub;
String emailMess;
EditText setEmailAddress;
EditText setEmailSubject;
EditText setEmailMessage;
Button btnSendEmail;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.emaillayout);
Bundle extras = getIntent().getExtras();
if (extras != null) {
emailPassed = extras.getString("passedEmailAdd");
}
setEmailAddress = (EditText) findViewById (R.id.inputEmailAddress);
setEmailAddress.setText(emailPassed);
setEmailSubject = (EditText) findViewById (R.id.inputEmailSubject);
setEmailMessage = (EditText) findViewById (R.id.inputEmailMessage);
btnSendEmail = (Button)findViewById(R.id.btnSendEmail);
btnSendEmail.setOnClickListener(this);
}
#Override
public void onClick(View sendEmailClick) {
emailAdd = setEmailAddress.getText().toString();
emailSub = setEmailSubject.getText().toString();
emailMess = setEmailMessage.getText().toString();
Intent sendEmailIntent = new Intent(Intent.ACTION_SEND);
sendEmailIntent.setType("plain/text");
sendEmailIntent.putExtra(Intent.EXTRA_EMAIL,new String[] {emailAdd});
sendEmailIntent.putExtra(Intent.EXTRA_SUBJECT, emailSub);
sendEmailIntent.putExtra(Intent.EXTRA_TEXT, emailMess);
startActivity(Intent.createChooser(sendEmailIntent, "Send mail..."));
}
}
It looks like you simply want to call finish() at the end of onClick(). This will close ContactsEmail allowing the user to return to a more useful Activity from the GMail app.