What I want is that when Activity starts first time, it first checks if nimiolemas is true. Since it just starts, then it can't be true. So, it will automatically starts new activity and also asks to get me info. In activity 2 person can type their name and when they press Ok, info will be sent back to activity one. Now, I don't know really how to change there Boolean to true and send that as well, so for now I told to change nimiolemas true before launching activity 2.
After pressing ok, it sends back to activity one and does the check again. Since it should be now true and also able to retrieve information about persons name, then it will go to true condition and print that name on screen in first activity. Now whenever program is launched, it will skip asking name and will straight show the person name :).
But it doesn't work exactly as I want. Before i put boolean, it actually went to second activity, but I couldn't get data so well. I have been working on solution for too long and I really appreciate help. If I find mistakes I can study from that more then searching on solution all over internet for next 10 hours :(.
I might have made some things very wrong, so please let me know and teach me! I really want to get better in this! So far I have done:
package viimane.voimalus;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
public class MainStuff extends Activity {
String tyybinimi;
TextView tere;
Boolean nimiolemas;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.menu);
tere = (TextView) findViewById(R.id.TERE);
Intent i = new Intent(this, nimekysija.class);
tyybinimi = i.getStringExtra("nimi");
if (nimiolemas = true) {
System.out.print(tyybinimi);
} else {
startActivity(i);
nimiolemas = true;
finish();
}
}
}
package viimane.voimalus;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
package viimane.voimalus;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class nimekysija extends Activity {
Intent resultIntent;
EditText nimi;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.nimekysija);
Button kysOk = (Button) findViewById(R.id.bNimekysija);
nimi = (EditText) findViewById(R.id.etNimekysija);
kysOk.setOnClickListener(new View.OnClickListener() {
String nimiS = nimi.getText().toString();
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent i = new Intent();
i.putExtra("nimi", nimiS);
startActivity(new Intent("viimane.voimalus.MAIN"));
finish();
}
});
}
}
Instead of using a boolean, you should be using Shared Preferences.
Related
So I'm fairly new to Java coding and I'm trying to create a simple code to have an edit text value act as a url for an intent internet command. I'm using this in Eclipse and ADT. The following is my java code.
import android.widget.EditText;
import android.widget.Button;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View.OnClickListener;
import android.view.View;
import android.content.Intent;
import android.net.Uri;
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button2 = (Button) findViewById(R.id.button2);
button2.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
EditText UR_L=(EditText) findViewById(R.id.ur_l);
String sUR_L= new String(UR_L.getText().toString());
Intent brwsrintnt = new Intent(Intent.ACTION_VIEW, Uri.parse(sUR_L));
startActivity(brwsrintnt);
}
});
In my layout I have a 2 buttons and an edit box but the edit box reflects a missing input type error. I have no idea how to fix this and I've looked many places.
Thanks,
David
I think your problem might be that the EditText is never intialized until you have already hit the button, so when you go to get text from it, it doesn't know the user has already entered something. Try moving
EditText UR_L=(EditText) findViewById(R.id.ur_l);
to just before you set the OnClickListener and see if anything changes
I wanted to navigate to a new page when clicking a button. Below are my both activities I have created. I am using eclipse and I am getting an error saying The method onClick(View) of type new View.OnClickListener(){} must override a superclass method on the main activity.
This is my main activity.
package com.example.grammer;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.support.v4.app.NavUtils;
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button grammerButton = (Button)findViewById(R.id.grammar);
grammerButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, Grammer.class);
startActivity(intent);
}
});
}
}
This is my second activity.
package com.example.grammer;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.support.v4.app.NavUtils;
import android.annotation.TargetApi;
import android.os.Build;
public class Grammer extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_grammer);
Button grammerButton = (Button) findViewById(R.id.grammar);
grammerButton.setOnClickListener(new View.OnClickListener() {
// #Override
public void onClick(View view) {
finish();
}
});
}
}
Removing the #override will remove the error, but then app is not working as intended.
Check this
OnClickListener() must override a superclass method?
Uncheck "Enable project specific settings", click "Configure Workspace Settings..." and change "Compiler Compliance Level" to 1.6 or above
Have this import statement
import android.view.View.OnClickListener;
There is no need to remove #Override Annotation.
Also calling finish() is not necessary. The hardware back button does the job.
When you press back button in Grammar Activity your current activity is popped from the back stack and the previous activity in the back stack takes focus. So there is no need to call finish() on button click.
http://developer.android.com/guide/components/tasks-and-back-stack.html
Also if you have a Button with id grammar in activity_grammer.xml it is ok.
Make sure you have a button with id grammar in activity_grammer.xml
You can read the topic id
http://developer.android.com/guide/topics/ui/declaring-layout.html
An ID need not be unique throughout the entire tree, but it should be unique within the part of the tree you are searching.
Change "Compiler Compliance Level" to 1.6. of java from project properties.
Place this code::
Just replace then name of layout and button id by your
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.alayout);
Button grammerButton = (Button)findViewById(R.id.aId);
grammerButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, Grammer.class);
startActivity(intent);
}
});
}
}
Just replace then name of layout and button id by your
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class Grammer extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.blayout);
Button grammerButton = (Button) findViewById(R.id.aId);
grammerButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
finish();
}
});
}
}
You are suppose to import the ViewClickListener namespace in your code.
Just Press ctrl + shift + O and it will add the relevant and missing namespaces in your project.
All you need is to import the library for OnClickListener. Just press ctrl + Shift + O in your eclipse and it will import the import android.view.View.OnClickListener file for you.
Try this..
First, You havn't import OnClickListener
import android.view.View.OnClickListener;
and second one
Button grammerButton = (Button) findViewById(R.id.grammar);
you are giving same name for both Button Ids in different layouts. Make sure you have a button with id grammar in activity_grammer.xml present are not.
I am writing a code for going to the next page after clicking a button so I have written the code that I have mentioned below i just want to confirn that it is correct as i cant check it now, I know this is silly but I need help
package com.example.myfirstapp;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class DetailsActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_details);
Button btnNextScreen = (Button) findViewById(R.id.btnNextScreen);
btnNextScreen.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent nextScreen = new Intent(getApplicationContext(), JewelInfo.class);
// TODO Auto-generated method stub
startActivity(nextScreen);
}
});
}
}
Assuming that your JewelInfo extends from an Activty it looks fine.
I think you should use Intent nextScreen = new Intent(DetailsActivity.this, JewelInfo.class); instead of getApplicationContext()
The correctness of code is never checked just by looking at a bit of code. Syntactically, it seems to not contain an error. Semantically, how should we know? You need to define what you want to do, how you want it to look, etc. Basically, what are the requirements?
We can then validate the code against the requirements but not assess the correctness as that is only discerned by executing the code and evaluating the result of the execution on the device it is executed against the requirements.
use DetailsActivity.this instead of getApplicationContext(), and declare your JewelInfo activity on the manifest file : <activity android:name=".JewelInfo" />.Check this tutorial about how to switch between activities and pass data between them
Hoping to get into android app development so I'm doing some basic tutorials just now.
Just trying to get comfortable with the basics at the moment, one of which is using the Typeface class.
package org.me.myandroidstuff;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Typeface;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class HelloWorldActivity extends Activity implements OnClickListener
{
private View mainView;
private TextView tbox1;
private Button exitButton;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mainView=(View)findViewById(R.id.mainView);
mainView.setBackgroundColor(getResources().getColor(R.color.silver));
tbox1 = (TextView)findViewById(R.id.textBox1);
tbox1.setTypeface(Typeface.MONOSPACE);
}
}
The line
tbox1 = (TextView)findViewById(R.id.textBox1);
Has a red cross beside it (I'm using eclipse) with the error
tbox1 cannot be resolved
Its been a while since i have used java, but as i aware the following code
create a new TextView object called tbox1
Assigns the tbox1 object the id specified in the xml for the TextView tag in an external main.xml
Then tbox1 executes the setTypeFace() method on itself?
Obviously I'm going wrong somewhere, any ideas? Something really simple no doubt...
You can't inform us about one error and neglect the others. Look at your code.
Besides what user370305 said, you have other problems. Namely, your Activity, according to the contract, implements OnClickListener but does not override the necessary onClick(View v) method. You must add it for the contract to be met.
So your code should look like:
package org.me.myandroidstuff;
import android.app.Activity;
import android.graphics.Typeface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class HelloWorldActivity extends Activity implements OnClickListener {
private View mainView;
private TextView tbox1;
private Button exitButton;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mainView=(View)findViewById(R.id.mainView);
mainView.setBackgroundColor(getResources().getColor(R.color.silver));
tbox1 = (TextView)findViewById(R.id.textBox1);
tbox1.setTypeface(Typeface.MONOSPACE);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
Remember, you can't talk about errors until you fix every other that might cause other errors to be falsely reported.
First try to set setContentView(R.layout.yourlayoutfilename); in onCreate().
1.) Delete line super.onCreate(savedInstanceState);
2.) Retype super.onCreate(savedInstanceState);
3.) Clean the Project
4.) Build the Project
Ok, thanks to below dude biggest issue is fixed. But whatever I print out, none is printed and I cannot print out the message what is typed in class 2 (nimekysija) as well :(. I really need that it stores name and in future it will write down name every time! Thanks for your help!
Problem must be in 2nd class tho. When I update editor.putString("nimi2", nimiS); nimiS into "plapla", then plapla actually shows up :/. So I have really no idea, what is problem!
(updated below classes too to the newest)
Class 1:
package viimane.voimalus;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.widget.TextView;
public class MainStuff extends Activity {
TextView tere;
String nimi;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.menu);
tere = (TextView) findViewById(R.id.tvTere);
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
boolean nimiOlemas = preferences.getBoolean("nimionolemas", false);
if (nimiOlemas == false){
startActivity(new Intent("viimane.voimalus.NIMEKYSIJA"));
finish();
}
if (nimiOlemas == true){
nimi = preferences.getString("nimi2", "");
System.out.print("töötab!");
tere.setText("Tere " + nimi);
}
System.out.print("töötab2!");
}
}
CLASS 2
package viimane.voimalus;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class nimekysija extends Activity {
EditText nimi;
SharedPreferences preferences;
String nimiS;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.nimekysija);
preferences = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
nimi = (EditText) findViewById(R.id.etNimekysija);
nimiS = nimi.getText().toString();
Button kysOk = (Button) findViewById(R.id.bNimekysija);
kysOk.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
SharedPreferences.Editor editor = preferences.edit();
editor.putString("nimi2", nimiS); // nime kirjutamine
editor.putBoolean("nimionolemas", true); // nimi on kirjutatud!
editor.commit();
startActivity(new Intent("viimane.voimalus.MAINSTUFF"));
finish();
}
});
}
}
Ok I'm guessing you may be new to Java, forgive me if I'm incorrect. You never READ from nimiOlemas.
boolean nimiOlemas = preferences.getBoolean("nimionolemas", false);
nimiOlemas = false;
startActivity(new Intent("viimane.voimalus.NIMEKYSIJA"));
finish();
nimiOlemas = true;
I think what you are trying to do is initialize nimiOlemas and then, if it is false, start an activity, call finish, then set nimiOlemas to true, but this is not what you are doing. Is this what you want?
boolean nimiOlemas = preferences.getBoolean("nimionolemas", false);
if (nimiOlemas == false)
{
startActivity(new Intent("viimane.voimalus.NIMEKYSIJA"));
finish();
nimiOlemas = true;
}
= is an assignment, == is a boolean comparison. You say in your question that you check the value of your boolean, but you never do, you only assign to it.
Assuming that nimiOlemas is inherited from activity and not used in the activity class, or other supper class, then yes it is not used in nimekysija (Class 2). It IS used in class 1. But this should just be a warning... You will get this warning for every class that extends activity and doesn't use nimiOlemas.