Develop Reference

App has stopped - ProgressBar in Android

friends. I started to learn Android app developinng with Android Studio and Java. Now i am trying to make one progressbar. When app is started we have two EditText fields where first is 100 by default(how will be the max value for progressbar ) and one EditText field for increment by(this is step) for progressbar. When we click Start it must show up via dialog.
I write the code, there is no more errors, but app is closing when i hit the Start Button. The progressbar is not working
This is the code:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TextView
android:id="#+id/txt_max"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Max Value" />
<EditText
android:id="#+id/maximum"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="100.0" />
<TextView
android:id="#+id/txt_increment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Increment by"/>
<EditText
android:id="#+id/increment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="5.0" />
<Button
android:id="#+id/butt_Start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Start" />
</LinearLayout>
This is the MainActivity.java:
public class MainActivity extends AppCompatActivity {
int increment;
ProgressDialog dialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button startButton = (Button) findViewById(R.id.butt_Start);
startButton.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
EditText et = (EditText) findViewById(increment);
increment = Integer.parseInt(et.getText().toString());
dialog = new ProgressDialog(MainActivity.this);
dialog.setCancelable(true);
dialog.setMessage("Loading...");
dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
dialog.setProgress(0);
EditText max = (EditText) findViewById(R.id.maximum);
int maximum = Integer.parseInt(max.getText().toString());
dialog.setMax(maximum);
dialog.show();
Thread background = new Thread(new Runnable()
{
public void run()
{
try
{
while (dialog.getProgress() <= dialog.getMax())
{
Thread.sleep(500);
progressHandler.sendMessage(progressHandler.obtainMessage());
}
} catch (java.lang.InterruptedException e)
{
}
}
});
background.start();
}
Handler progressHandler = new Handler() {
public void handleMessage(Message msg) {
dialog.incrementProgressBy(increment);
}
};
});
}
}

There are some error with that code.. I will comment each by reporting your snippet:
public class MainActivity extends AppCompatActivity {
int increment;
ProgressDialog dialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button startButton = (Button) findViewById(R.id.butt_Start);
startButton.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
EditText et = (EditText) findViewById(increment);
Here is the first error: not really a wrong thing, but it's better to istantiate the EditText in your onCreate (outside the onClick), because this way you will re-create the EditText every time you click the button.
The error is double: you are using findViewById(increment) where, in your code, increment is an int variable whose value is actually 0. You have to use (as you did for the button)
findViewById(R.id.increment);
Going on:
increment = Integer.parseInt(et.getText().toString());
dialog = new ProgressDialog(MainActivity.this);
dialog.setCancelable(true);
dialog.setMessage("Loading...");
dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
dialog.setProgress(0);
EditText max = (EditText) findViewById(R.id.maximum);
int maximum = Integer.parseInt(max.getText().toString());
Here the error is xml side: since you are assuming that max.getText().toString() is an Integer, add inputType to your xml with number value.
dialog.setMax(maximum);
dialog.show();
Thread background = new Thread(new Runnable()
{
public void run()
{
try
{
while (dialog.getProgress() <= dialog.getMax())
{
Thread.sleep(500);
progressHandler.sendMessage(progressHandler.obtainMessage());
}
} catch (java.lang.InterruptedException e)
{
}
}
});
background.start();
}
Handler progressHandler = new Handler() {
public void handleMessage(Message msg) {
dialog.incrementProgressBy(increment);
}
};
});
}
}
Another thing is that is better to avoid naming a variable with same name of your id, expecially because id should be representative of the control you are pointing at (for example call it "EditTextMaxValueMainActivity", this is a limit example but it is representative).
If I can suggest you, TheNewBoston channel/site is the best for tutorials, it has a couple of playlist with android basics to advanced and it is simple and really explicative. Good luck!
for other errors, we will need the logtrace

The Answer for me is here:
This line:
EditText et = (EditText) findViewById(increment);
Must be changed to:
EditText et = (EditText) findViewById**(R.id.increment)**;
And i go to design view of activity_main.xml and changed the inputType of increment EditText and maximum EditText to number.
And removed the decimal format from the numbers.
<EditText
android:id="#+id/increment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="5" />
And here i had number with decimal, now i removed them.
<EditText
android:id="#+id/maximum"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="100" />

Java EditText not validating correctly

Can someone help with this? My EditText is not empty but the toast still shows up. My app require users to select Date and Time, then select 1 item on the listview to proceed. A dialog will pop out after that. However for some reason, even though my edittext isn't empty, it still won't allow me to continue. I can't seem to figure out what's wrong, I mean the code is just that simple, nothing complicate.
final String date = textDate1.getText().toString().trim();
final String time = textTime1.getText().toString().trim();
listViewHistory.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
final Team team = teams.get(i);
if(TextUtils.isEmpty(date)){
Toast.makeText(RecreateActivity.this,"Please choose a date.",Toast.LENGTH_LONG).show();
return;
}
if(TextUtils.isEmpty(time)){
Toast.makeText(RecreateActivity.this,"Please choose a time.",Toast.LENGTH_LONG).show();
return;
}
//the rest of the code
final AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(RecreateActivity.this);
LayoutInflater inflater = getLayoutInflater();
final View dialogView = inflater.inflate(R.layout.confirm_layout, null);
dialogBuilder.setView(dialogView);
final Button buttonYes2 = (Button) dialogView.findViewById(R.id.buttonYes2);
final Button buttonNo2 = (Button) dialogView.findViewById(R.id.buttonNo2);
//final Team team = teams.get();
final AlertDialog b = dialogBuilder.create();
b.show();
buttonYes2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
databaseMembers.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
final ArrayList<String> CheckList = new ArrayList<String>();
for (DataSnapshot check : dataSnapshot.child("teams").getChildren()) {
CheckList.add(check.getKey());
}
if (CheckList.contains(team.getTeamName())) {
Toast.makeText(RecreateActivity.this, "Team already exist.", Toast.LENGTH_LONG).show();
return;
}
databaseMembers.child("History").child(team.getTeamName()).child("date").setValue(date);
databaseMembers.child("History").child(team.getTeamName()).child("time").setValue(time);
for (DataSnapshot history : dataSnapshot.child("History").child(encodedEmailAddress).getChildren()) {
String key = history.getKey();
if (key.equals(team.getTeamName())) {
teams.clear();
Team team = history.getValue(Team.class);
teams.add(team);
databaseTeams.child(team.getTeamName()).setValue(team);
}
if (key.equals("teamMember")) {
for (DataSnapshot members : dataSnapshot.child("History").child(encodedEmailAddress).child("teamMember").getChildren()) {
String key2 = members.getKey();
String value = members.getValue(String.class);
Map<String, Object> map = new HashMap<>();
map.put(key2, value);
databaseMembers.child("members").child(team.getTeamName()).child("teamMember").updateChildren(map);
b.dismiss();
}
}
}
Toast.makeText(RecreateActivity.this, "Team created.", Toast.LENGTH_LONG).show();
Intent myIntent = new Intent(RecreateActivity.this,
MainActivity.class);
startActivity(myIntent);
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
});
}
XML:
<TextView
android:id="#+id/textView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Previous Team"
android:textAppearance="#style/TextAppearance.AppCompat.Title"
android:textAlignment="center"/>
<TextView
android:id="#+id/textView3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Select new Date/Time and tap on the Team."
android:textAlignment="center"/>
<ListView
android:id="#+id/listViewHistory"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
</ListView>
<TextView
android:id="#+id/textView5"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Members:"
android:textAppearance="#style/TextAppearance.AppCompat.Headline" />
<TextView
android:id="#+id/textViewList"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text=""
android:textAppearance="#style/TextAppearance.AppCompat.Medium" />
<EditText
android:id="#+id/textDate1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Select Date..."
android:layout_alignParentStart="true" />
<EditText
android:id="#+id/textTime1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Select Time..."
android:layout_below="#+id/textDate"
android:layout_alignParentStart="true" />
<Button
android:id="#+id/buttonAddHistory"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Create Team"
android:textAlignment="center"
android:textAllCaps="false"
tools:textSize="20sp" />

You are getting string from EditText only once - before setting OnItemClickListener. You need to get string inside the listener.
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
final Team team = teams.get(i);
final String date = textDate1.getText().toString().trim();
final String time = textTime1.getText().toString().trim();
if(TextUtils.isEmpty(date)){
Toast.makeText(RecreateActivity.this,"Please choose a date.",Toast.LENGTH_LONG).show();
return;
}
if(TextUtils.isEmpty(time)){
Toast.makeText(RecreateActivity.this,"Please choose a time.",Toast.LENGTH_LONG).show();
return;
}
}

Your field is initialized only once. I don't know the context, this may be actually what you want, but then it doesn't make any sense to validate it every time, those fields have the same value every time the listener code is run. Try to add the code to get date and time in the listener itself.

Your code is setting [date] and [time] outside of the onClickListener. When the user clicks the button, your code isn't resetting the variables. I'd evaluate the EditText directly from your onClickListener code:
listViewHistory.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
final Team team = teams.get(i);
if(TextUtils.isEmpty(textDate1.getText().toString().trim())){
Toast.makeText(RecreateActivity.this,"Please choose a date.",Toast.LENGTH_LONG).show();
return;
}
if(TextUtils.isEmpty(textTime1.getText().toString().trim())){
Toast.makeText(RecreateActivity.this,"Please choose a time.",Toast.LENGTH_LONG).show();
return;
}

Try getting date value of edittext inside the click listener.

listViewHistory.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
final Team team = teams.get(i);
final String date = textDate1.getText().toString().trim();
final String time = textTime1.getText().toString().trim();
if(date.isEmpty()){
Toast.makeText(RecreateActivity.this,"Please choose a date.",Toast.LENGTH_LONG).show();
return;
}
if(time.isEmpty()){
Toast.makeText(RecreateActivity.this,"Please choose a time.",Toast.LENGTH_LONG).show();
return;
}

Inflated layout to alertdialog doesn't work

I have the following method where I must confirm the user's password before he is allowed to access the Setup menu. To do so, I make him login again because Parse (my cloud storage) doesn't allow me to confirm passwords. So far so good. The problem is when I inflate the view to my AlertDialog to use a custom button and EditText. You can see in my code below that I have commented the Button section, because when I try to get the onClickListener it doesn't work. It just does nothing. So I'm currently using the alertDialogPositiveButton and it's ok. The second problem and the real one is that I cannot retrieve the data insert into the editText. The SUpassword3is always equals to blank, not null. Can someone please help?
method:
public void confirmPassword(){
final LayoutInflater inflateSetup = getLayoutInflater();
AlertDialog.Builder alertSetup = new AlertDialog.Builder(this);
alertSetup.setView(inflateSetup.inflate(R.layout.inflate_setup, null));
alertSetup.setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
System.out.println("User has clicked the [confirm] button");
View viewInflate_setup = inflateSetup.inflate(R.layout.inflate_setup, null);
edtPassword3 = (EditText)viewInflate_setup.findViewById(R.id.edtPassword3);
SUpassword3 = edtPassword3.getText().toString();
final ParseUser beforeConfirmPassword = ParseUser.getCurrentUser();
ParseUser.logInInBackground(beforeConfirmPassword.getUsername(), SUpassword3, new LogInCallback() {
#Override
public void done(ParseUser parseUser, ParseException e) {
if(e==null){
//password confirmed, logout last user and go to next setup
System.out.println("Password [" +SUpassword3+ "] and user [" +beforeConfirmPassword.getUsername()+ "] confirmed, logout last user and go to setup");
beforeConfirmPassword.logOut();
}else{
//passwords don't match
System.out.println("Password don't match: [" +SUpassword3 + "] USER [" +beforeConfirmPassword.getUsername()+ "]");
}
}
});
}
});
final AlertDialog dialogSetup = alertSetup.create();
dialogSetup.show();
/**
btnConfirmPassowod = (Button)viewInflate_setup.findViewById(R.id.btnConfirm);
btnConfirmPassowod.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(final View v) {
System.out.println("User has clicked the [confirm] button");
final ParseUser beforeConfirmPassword = ParseUser.getCurrentUser();
ParseUser.logInInBackground(beforeConfirmPassword.getUsername(), SUpassword3, new LogInCallback() {
#Override
public void done(ParseUser parseUser, ParseException e) {
if(e==null){
//password confirmed, logout last user and go to next setup
System.out.println("Password confirmed, logout last user and go to setup");
beforeConfirmPassword.logOut();
}else{
//passwords don't match
dialogSetup.dismiss();
Snackbar.make(v, "Wrong password, try again.", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
}
});
}
}); */
}
inflate_setup.xml(the xml file I inflate on the alertDialog)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:ems="10"
android:id="#+id/edtPassword3"
android:layout_gravity="center_horizontal"
android:hint="#string/EN_txt.confirmPassword"
/>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="New Button"
android:id="#+id/btnConfirm"
android:layout_gravity="center_horizontal" />
</LinearLayout>
Final version(working):
public void confirmPassword(){
final LayoutInflater inflateSetup = getLayoutInflater();
final View viewInflate_setup = inflateSetup.inflate(R.layout.inflate_setup, null);
AlertDialog.Builder alertSetup = new AlertDialog.Builder(this);
alertSetup.setView(viewInflate_setup);
alertSetup.setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
System.out.println("User has clicked the [confirm] button");
edtPassword3 = (EditText)viewInflate_setup.findViewById(R.id.edtPassword3);
SUpassword3 = edtPassword3.getText().toString();
...

You inflate another view inside your onClickListener. That's why you actually check text of another edtPassword3, not that one which visible for user. It should be something like that:
View view = inflateSetup.inflate(R.layout.inflate_setup;
final EditText edtPassword3 = (EditText)viewInflate_setup.findViewById(R.id.edtPassword3);
alertSetup.setView(view, null));
alertSetup.setPositiveButton("Confirm", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
System.out.println("User has clicked the [confirm] button");
SUpassword3 = edtPassword3.getText().toString();
....

Try to use: Dialog class
// custom dialog
final Dialog dialog = new Dialog(context);
dialog.setContentView(R.layout.custom);
dialog.setTitle("Title...");

Get a reference of the inflated view:
View dialogView = inflateSetup.inflate(R.layout.inflate_setup, null);
In dialog use:
alertSetup.setView(dialogView);
Then, access button using:
Button myButton = (Button) dialogView.findViewById(R.id.btnConfirm);

CheckBox doesnt reponse to check state (Android Studio)

Lets suppose I have 2 checkbox ("checkbox1" and "checkbox2") and I set: SetChecked(true) For "checkbox1" and : SetChcked(false) for "checkbox2". my purpose is to relate them and switch between the check state when I click on one of them ,(if "checkbox1" is checked and I checked "checkbox2" then "checkbox2" will be checked and "checkbox1" will be unchecked and by viceversa)
Here is my code :
final CheckBox ChckBoxNo = (CheckBox) promptsView.findViewById(R.id.ChkBoxNo);
final CheckBox ChckBoxYes = (CheckBox) promptsView.findViewById(R.id.ChkBoxYes);
ChckBoxNo.setChecked(true);
ChckBoxYes.setChecked(false);
ChckBoxNo.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (ChckBoxNo.isChecked()) {
ChckBoxYes.setChecked(false);
} else if (!ChckBoxNo.isChecked()) {
ChckBoxYes.setChecked(true);
}
}
});
ChckBoxYes.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (ChckBoxYes.isChecked()) {
ChckBoxNo.setChecked(false);
} else if (!ChckBoxYes.isChecked()) {
ChckBoxNo.setChecked(true);
}
}
});
//these if's allways response to "ChckBoxNo.IsChecked()" ,even if its the
// opposite and "ChckBoxYes.isChcked()"
if(ChckBoxYes.isChecked())
{do ...
}
else if (ChckBoxNo.isChecked()
{ do ...
}
When I run the app by visibility evreything is good When I click on "ChckBoxYes" it's checked and "ChckboxNo" is unchecked and viceversa,but its allways get the default value that I set before implenting the "OnCheckedChangeListener" (ChckBoxNo.SetChcked(true), ChckBoxYes.SetChecked(false) , even if its opposite and "ChckBoxYes" is chcked)
What should I do in order to fix that?
thanks !

This is not the right way to approach your problem. Luckily there is already a built-in component for that called RadioGroup. You could do something like this:
Have your Activity's xml file something like this:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RadioGroup
android:id="#+id/radio_group"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RadioButton
android:id="#+id/radio_button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="CheckBox1" />
<RadioButton
android:id="#+id/radio_button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="CheckBox2" />
</RadioGroup>
</LinearLayout>
And in your Activity you can interact with this component and handle whatever you want when any of the RadioButtons are tapped like this:
public class MainActivity extends Activity {
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
RadioGroup radioGroup = (RadioGroup) findViewById(R.id.radio_group);
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
if (checkedId == R.id.radio_button1) {
//First is checked
} else if (checkedId == R.id.radio_button2) {
// Second is checked
}
}
});
}
}

Trouble with my custom layout for an Alert Dialog

Making a to-do list. Having 2 issues, The not so important issue is that for some reason I can't see the TextView's that I set up as "labels". The more important thing is that when I click the create new task button, my alert pops up, I can put values in my EditText boxes, but when I hit create, it crashes and I get a NullPointer exception saying I'm trying to call getText() on a null object reference. I can't figure out if I'm inflating incorrectly or if I'm not linking the EditTexts to the alert properly. The annoying thing is that my edittext alert box works just fine editing existing list items(that I hardcoded for testing). Here's my layout and activity, I commented the line in which it breaks. Sorry about all the Log.d's I'm really trying to visualize how all this works.
The Layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<EditText
android:layout_width="55dp"
android:layout_height="wrap_content"
android:inputType="number"
android:ems="10"
android:id="#+id/txtCreatePriority"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginLeft="25dp"
android:hint="1"
android:textAlignment="center" />
<EditText
android:layout_width="235dp"
android:layout_height="wrap_content"
android:id="#+id/txtCreateItemContent"
android:layout_centerVertical="true"
android:layout_toRightOf="#+id/txtCreatePriority"
android:layout_toEndOf="#+id/txtCreatePriority"
android:layout_marginLeft="15dp"
android:hint="Do Laundry"
android:textAlignment="center" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Priority"
android:id="#+id/lblPriority"
android:layout_above="#+id/txtCreatePriority"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginLeft="17dp"
android:textStyle="bold"
android:textSize="23dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Task to-do"
android:id="#+id/lblItemContent"
android:layout_above="#+id/txtCreateItemContent"
android:layout_toRightOf="#+id/lblPriority"
android:layout_toEndOf="#+id/lblPriority"
android:layout_marginLeft="65dp"
android:textStyle="bold"
android:textSize="23dp" />
</RelativeLayout>
The Activity
public class MainActivity extends AppCompatActivity {
private ListDataSource ds;
private ListView listViewToDo;
private Button btnAddNew;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Context context = this;
Log.d("MainActivity","Attempting to create data source");
try {
ds = new ListDataSource();
}
catch(Exception e)
{
e.printStackTrace();
Log.d("MainActivity","Failed to create data source");
}
btnAddNew = (Button)findViewById(R.id.btnAddNew);
Log.d("Main Activity","Attempting to link empty list view to on screen view");
listViewToDo = (ListView)findViewById(R.id.listOfLists);
Log.d("Main Activity", "Views linked, Attempting to set adapter to listView");
listViewToDo.setAdapter(new ListDataSourceAdapter(this, ds));
Log.d("Main Activity", "Successfully set Adapter");
btnAddNew.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d("addItem", "Entered onclick, Attempting to create AlertDialog");
AlertDialog.Builder addItem = new AlertDialog.Builder(context);
Log.d("addItem", "AlertDialog Built, attempting to create inflater");
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
addItem.setView(inflater.inflate(R.layout.create_item_layout, null));
Log.d("addItem", "inflater built linking text boxes");
final TextView txtCreatePriority = (TextView)findViewById(R.id.txtCreatePriority);
final TextView txtCreateCellContent = (TextView)findViewById(R.id.txtCreateItemContent);
final TextView lblPriority = (TextView)findViewById(R.id.lblPriority);
final TextView lblItemContent = (TextView)findViewById(R.id.lblItemContent);
addItem.setTitle("Create new item");
addItem
.setCancelable(false)
.setPositiveButton("Create", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Log.d("editText onClick", "in onClick method, preparing to add entry");
// This is where the code breaks
ds.getList().add(Integer.valueOf(txtCreatePriority.getText().toString()), new CellContent(Integer.valueOf(txtCreatePriority.getText().toString()) + 1, txtCreateCellContent.getText().toString().trim()));
Log.d("editText onClick", "added new entry");
ListDataSourceAdapter adapter = new ListDataSourceAdapter(context, ds);
Log.d("editText onClick", "reestablished link to adapter");
listViewToDo.setAdapter(adapter);
Log.d("editText onClick", "adapter set");
adapter.notifyDataSetChanged();
Log.d("editText onClick", "DataSetChanged");
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alertDialog = addItem.create();
alertDialog.show();
}
});
// add button listener
listViewToDo.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view, final int position, long id)
{
AlertDialog.Builder editItem = new AlertDialog.Builder(context);
final EditText edittext = new EditText(context);
editItem.setTitle("Change item");
editItem
.setMessage("Set new todo item")
.setView(edittext)
.setCancelable(false)
.setPositiveButton("Submit", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int id)
{
Log.d("editText onClick","in onClick method, preparing to remove previous entry");
ds.getList().remove(position);
Log.d("editText onClick", "removed previous entry");
ds.getList().add(position, new CellContent(position + 1, edittext.getText().toString().trim()));
Log.d("editText onClick", "added new entry");
ListDataSourceAdapter adapter = new ListDataSourceAdapter(context,ds);
Log.d("editText onClick","reestablished link to adapter");
listViewToDo.setAdapter(adapter);
Log.d("editText onClick", "adapter set");
adapter.notifyDataSetChanged();
Log.d("editText onClick", "DataSetChanged");
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alertDialog = editItem.create();
alertDialog.show();
}
});
}
}
The Error
java.lang.NullPointerException: Attempt to invoke virtual method 'android.text.Editable android.widget.EditText.getText()' on a null object reference

You're calling "(EditText)v.findViewById" on the view v.
The view v is the view passed back in the onClickListener, which is the button itself.
Since that button does not contain the EditTexts within it, those views are null. And crash when you try to access them.
I'm a little uncertain where the layout with the edit texts is in this code. Is it in the same layout as the listview, or in create_item_layout?
If its create_item_layout, that needs to be inflated before getting the EditTexts. Use the view you inflate to findViewById.