I get this error while debugging. I put a breakpoint somewhere in the code.
The project is built and run on my device, but in debugging I get this code, which is looking for android.jar
My target version of android is 2.2. I chose /appcompat_v7/bin/appcompat_v7.jar instead of android.jar, assuming this version of Android is based on appcompat_v7.jar. I don't know.... I was just assuming. Nevertheless, it's not working.
I checked some of Similar Questions and I couldn't find the exactly my answer, this was the most similar problem, yet my problem wasn't solved:
Eclipse java debugging: source not found
This is a screenshot of the error:
http://i.stack.imgur.com/6m45J.png
Thhanks. :)
package com.thenewboston.travis;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.TextView;
public class OpenedClass extends Activity implements OnClickListener,
OnCheckedChangeListener {
TextView question, test;
Button returnData;
RadioGroup selectionList;
String gotBread;
String setData;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.send);
initialize();
// Bundle gotBasket = getIntent().getExtras();
// gotBread = gotBasket.getString("key");
// question.setText(gotBread);
}
private void initialize() {
// TODO Auto-generated method stub
question = (TextView) findViewById(R.id.tvQuestion);
test = (TextView) findViewById(R.id.tvText);
returnData = (Button) findViewById(R.id.bReturn);
returnData.setOnClickListener(this);
selectionList = (RadioGroup) findViewById(R.id.rgAnswers);
selectionList.setOnCheckedChangeListener(this);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent person = new Intent();
Bundle backpack = new Bundle();
backpack.putString("answer", setData);
person.putExtras(backpack);
setResult(RESULT_OK, person);
finish();
}
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
switch (checkedId) {
case R.id.rCrazy:
setData = "Probably right!";
break;
case R.id.rSexy:
setData = "Definitely right!";
break;
case R.id.rBoth:
setData = "Spot On!";
break;
default:
break;
}
test.setText(setData);
}
}
This is not an error.
You try to open the source of the class, but you only have access to the .class file (which is all you need to run it).
You can attach the code (for instance by clicking the Change attached sources button), but this is in no way mandatory.
You have skip that point by pressing F8 instead of F6 cause you have limitation of it. So try this one.
Related
I want to make password protected android app, but when in this simple program system is not matching two strings.
package com.pokmgr;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.text.Editable;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class MainPM extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.pm_layout);
final EditText pin = (EditText) findViewById(R.id.pinET);
final String pass = pin.getText().toString();
final String code = "ajaj";
Button enter = (Button) findViewById(R.id.enterBtn);
enter.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if (pass.equals(code)) {
Intent in = new Intent(MainPM.this, Menu.class);
startActivity(in);
}
else {
Intent in = new Intent(MainPM.this, Menu2.class);
startActivity(in);
}
}
});
}
/*#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.pm_layout, menu);
return true;
}*/
}
I have made Menu and Menu2 class, but every time Menu2 class is accessed. Even if I enter same pass that is "ajaj" [in this code to test]
i have defined both activities in manifest file.
Can't understand why pass.eqals(code) is not working
The problem is that you are setting pass to the contents of the EditText when the activity gets created. Instead you have to retrieve the contents of your EditText inside the OnClickListener.
Like this:
public void onClick(View v) {
final String pass = pin.getText().toString();
if (pass.equals(code)) {
// do something
} else {
// do something different
}
}
Put pin.getText().toString(); inside onClick of button. You are setting variable pass before the user actually entered something in pinEt EditText.
I have a button that leads to another page. And whenever I click it I get this info code in logcat :
12-07 16:09:45.073: I/ActivityManager(273): Displayed com.example.prva/.button: +1s764ms
Seconds and ms vary of course each time between 1-3 seconds. The problem is that I noticed that it takes a while for that button to open that page. It has some kind of pause or whatever and this is the only relevant thing I have found in the logcat that could be connected to it. How can I fix this, why is this button acting "slow"?
This is where the button code is :
package com.example.prva;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class Meni_Splash extends Activity{
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btnv = (Button) findViewById(R.id.buttonv);
btnv.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity(new Intent(Meni_Splash.this, button.class));
}
});
}
}
And this is the class that opens :
package com.example.prva;
import android.app.Activity;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
public class button extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.button);
//Button click sound
final MediaPlayer MPRadio1 = MediaPlayer.create(this, R.raw.radio1);
final MediaPlayer MPRadio2 = MediaPlayer.create(this, R.raw.radio2);
final MediaPlayer MPRadio3 = MediaPlayer.create(this, R.raw.radio3);
final RadioButton rb1, rb2, rb3;
rb1 = (RadioButton) findViewById(R.id.radio1);
rb2 = (RadioButton) findViewById(R.id.radio2);
rb3 = (RadioButton) findViewById(R.id.radio3);
Button btn = (Button) findViewById(R.id.buttonplay);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(rb1.isChecked())
{
MPRadio1.start();
}
else
{
if(rb2.isChecked())
{
MPRadio2.start();
}
else
{
if(rb3.isChecked())
{
MPRadio3.start();
}
}
}
}
}
);}}
I don't know what thing could make it so slow from these activities?
Your code looks pretty decent to be honest. Not sure entirely what could be causing it to intialise slowly.
But there are two areas to look at.
The first, most likely, is your layout loading:
setContentView(R.layout.button);
I dont imagine your layout to be complex though. But if it is, aka, lots of nested views (linear layouts within other linear layouts), or lots of views (textviews etc) in general on the page, then it could be taking a while to "inflate" the Layout.
Alternatively and less likely, is that MediaPlayer.create takes a fair while to load. The reason I suggest this, is I have no idea how it works, as I've not used it before.
//Button click sound
final MediaPlayer MPRadio1 = MediaPlayer.create(this, R.raw.radio1);
final MediaPlayer MPRadio2 = MediaPlayer.create(this, R.raw.radio2);
final MediaPlayer MPRadio3 = MediaPlayer.create(this, R.raw.radio3);
The best thing to do, would be to profile it with the DDMS profiler. Or put a timer around it, and print the results to logcat.
Also, on a quick note, is it just 2-3 seconds loading? And is it really that bad for what its trying to do?
I am learning android so I wrote this code just to toggle phone ringer mode. The code compiles with no problem, I made entry in Android Manifest, set content view to the required Layout but I run this app, I get Force close error. Can somebody tell me why Force Close errors occur so that in future I should be to figure out the problem myself.Here is the code:
package com.umer.practice2;
import android.R.bool;
import android.app.Activity;
import android.media.AudioManager;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.ToggleButton;
public class RingerMode extends Activity implements View.OnClickListener {
ToggleButton tb;
ImageView Riv;
TextView tv;
AudioManager mRing;
boolean silent;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.ringermode);
tb.setOnClickListener(this);
InitializeShit();
mRing=(AudioManager) getSystemService(AUDIO_SERVICE);
}
private void InitializeShit() {
// TODO Auto-generated method stub
tb= (ToggleButton) findViewById(R.id.ringTB);
tv= (TextView) findViewById(R.id.ringTV);
Riv= (ImageView) findViewById(R.id.ringIV);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
checkMode();
if(silent)
{
Riv.setImageResource(R.drawable.mysplash);
}else
{
Riv.setImageResource(R.drawable.myscreen);
}
}
#Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
checkMode();
}
private void checkMode() {
// TODO Auto-generated method stub
int temp = mRing.getRingerMode();
if(temp==AudioManager.RINGER_MODE_SILENT)
{
tv.setText("Silent");
Riv.setImageResource(R.drawable.mysplash);
silent= true;
}else
if(temp==AudioManager.RINGER_MODE_NORMAL)
{
tv.setText("Normal");
Riv.setImageResource(R.drawable.myscreen);
silent= false;
}
}
Many Thanks
You need to take a look at the logcat to see what happens. See Logcat | Android Developers.
Find the stacktrace of the crash, which points to your problem. If you can't figure it out yourself, please copy/paste the logcat in your question.
In this very case, you are referencing tb before initializing it:
tb.setOnClickListener(this);
At this point, tb is still null, so a NullPointerException occurs. To resolve this, change your code like this:
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.ringermode);
InitializeShit();
tb.setOnClickListener(this);
mRing=(AudioManager) getSystemService(AUDIO_SERVICE);
}
Also, I recommend using Java's conventions regarding methods and variable naming:
Classes start with a capital: e.g. MyClass
Variables start with a lowercase: e.g. myVariable
Methods start with a lowercase: e.g. myMethod()
This will save you from confusion later on.
My question is if it is possible to write code before setContentView() in the onCreate() method of the main Activity. In the code below I want to call the setVariables() before setContentView() but this causes my application to crash. If I call setVariables() after setContentView(), it works fine. Why is this?
package com.oxinos.android.moc;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;
public class mocActivity extends Activity {
/** Called when the activity is first created. */
public static String prefsFile = "mocPrefs";
SharedPreferences mocPrefs;
public Resources res;
public CheckBox cafesCB, barsRestCB, clothingCB, groceriesCB, miscCB;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setVariables();
setContentView(R.layout.main);
mocPrefs = getSharedPreferences(prefsFile,0);
}
private void setVariables(){
res = getResources();
cafesCB = (CheckBox) findViewById(R.id.cafesCheckBox);
barsRestCB = (CheckBox) findViewById(R.id.barsRestCheckBox);
clothingCB = (CheckBox) findViewById(R.id.clothingCheckBox);
groceriesCB = (CheckBox) findViewById(R.id.groceriesCheckBox);
miscCB = (CheckBox) findViewById(R.id.miscCheckBox);
}
public void submitHandler(View view){
switch (view.getId()) {
case R.id.submitButton:
boolean cafes = cafesCB.isChecked();
boolean barsRest = barsRestCB.isChecked();
boolean clothing = clothingCB.isChecked();
boolean groceries = groceriesCB.isChecked();
boolean misc = miscCB.isChecked();
SharedPreferences.Editor editor = mocPrefs.edit();
editor.putBoolean(res.getString(R.string.cafesBool), cafes);
editor.putBoolean(res.getString(R.string.barsRestBool), barsRest);
editor.putBoolean(res.getString(R.string.clothingBool), clothing);
editor.putBoolean(res.getString(R.string.groceriesBool), groceries);
editor.putBoolean(res.getString(R.string.miscBool), misc);
editor.commit();
startActivity(new Intent(this, mocActivity2.class));
break;
}
}
}
You can execute any code you want before the setContentView() method as long as it doesn't refer to (parts of) the View, which isn't set yet.
Since your setVariables() method refers to the contents of the View, it can't be executed.
The setContentView() method sets the content of your XML file as the View, which is shown by the Activity.
You're calling setVariables() before you've specified any View to be shown.
That's why the error raises. The compiler doesn't know where that View belongs to. If you want to use a ResourceView, you have to set it first.
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.