How to set null validation in edittextpreference dialog - android

How to set null validation in edittextpreference dialog so that if it is null, the user should not be able to click ok and some message should be displayed in the dialog itself. I have been trying to find it for a long time but no success....

edttxtpref = (EditTextPreference) getPreferenceScreen().findPreference(
"edttxtkey");
edttxtpref.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
#Override
public boolean onPreferenceChange(
android.preference.Preference preference, Object newValue) {
if (newValue.toString().trim().equals("")) {
Toast.makeText(getActivity(), "Username can not be empty",
Toast.LENGTH_LONG).show();
return false;
}
return true;
}
});
This way the validation is done and if we want to display the message in dialog itself then a custom dialog has to be created as already told by Phil.

I think what you are looking for is this. You are using the predefined PreferenceDialog (with EditText) and want to check if the Text is null. According to my knowledge, the "text" in this case is the changedPreference, therefore you can go with this:
Simply use an onPreferenceChangedListener for that.
yourPreference.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
#Override
public boolean onPreferenceChange(Preference preference, Object changedValue) {
if(changedValue == null) {
// handle it being null
return false;
} else {
return true;
}
}
});
For more advanced requirements, I would recommend that you implement your own Dialog and inside it, do whatever you desire. You can make that happen by defining a Preference list entry in .xml and then spawn the Dialog upon clicking on it.
Preference yourCustomPref = (Preference) findPreference("yourPref");
yourCustomPref.setOnPreferenceClickListener(new OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
// spawn your dialog here
return true;
}
});
This is how you could implement your custom EditText Dialog:
public Builder buildDialog(final Context c) {
AlertDialog.Builder builder = new AlertDialog.Builder(c);
builder.setTitle("EditText Dialog");
builder.setMessage("Enter text:");
LinearLayout llV = new LinearLayout(c);
llV.setOrientation(1); // 1 = vertical
final EditText patName = new EditText(c);
patName.setHint("Enter text...");
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT, 1f);
lp.bottomMargin = 20;
lp.rightMargin = 30;
lp.leftMargin = 15;
patName.setLayoutParams(lp);
llV.addView(patName);
builder.setView(llV);
builder.setPositiveButton("Save", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
if(patName.getText().toString().length() > 0) {
} else {
}
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
return builder;
}
And then call it like this:
buildDialog(yourcontext).show();

When edittext is null then ok button will be disabled and as soon as the text is entered it will be enabled::
public class CustomEditTextPreference extends EditTextPreference implements
OnClickListener {
public CustomEditTextPreference(Context ctx, AttributeSet attrs, int defStyle)
{
super(ctx, attrs, defStyle);
}
public CustomEditTextPreference(Context ctx, AttributeSet attrs)
{
super(ctx, attrs);
}
private class EditTextWatcher implements TextWatcher
{
#Override
public void onTextChanged(CharSequence s, int start, int before, int count){}
#Override
public void beforeTextChanged(CharSequence s, int start, int before, int count){}
#Override
public void afterTextChanged(Editable s)
{
onEditTextChanged();
}
}
EditTextWatcher m_watcher = new EditTextWatcher();
/**
* Return true in order to enable positive button or false to disable it.
*/
protected boolean onCheckValue(String value)
{
if (value.trim().equals(""))
{
return false;
}
return true;
}
protected void onEditTextChanged()
{
boolean enable = onCheckValue(getEditText().getText().toString());
Dialog dlg = getDialog();
if(dlg instanceof AlertDialog)
{
AlertDialog alertDlg = (AlertDialog)dlg;
Button btn = alertDlg.getButton(AlertDialog.BUTTON_POSITIVE);
btn.setEnabled(enable);
}
}
#Override
protected void showDialog(Bundle state)
{
super.showDialog(state);
getEditText().removeTextChangedListener(m_watcher);
getEditText().addTextChangedListener(m_watcher);
onEditTextChanged();
}
}

Related

AlertDialog issue on Android

I ran into some strange UI issues while trying to display a custom content AlertDialog. The dialog asks the user to enter a name and it doesn't allow him to move forward without doing so. It is also the first thing that the user sees when the activity starts.
Sometimes, right after the application gets restarted - let's say I press the home button when the dialog is opened and then I reopen the app, the AlertDialog is being displayed as it should be but the parent activity's layout is not being loaded correctly. It actually keeps the layout from the previous Activity that the user was seeing. Even stranger, this layout is almost always displayed backwards. You can probably see that better in here. Behind the dialog it should be a blank white layout but instead there's a reverted "snapshot" of the launcher activity from the Settings app.
As the official documentation suggests I am wrapping the AlertDialog in a DialogFragment.
public class NicknamePickerDialog extends DialogFragment {
public static final String TAG = NicknamePickerDialog.class.getSimpleName();
public interface NicknameDialogListener {
void onNicknamePicked(String nickname);
void onPickerCanceled();
}
private NicknameDialogListener mListener;
private EditText mNicknameEditText;
private Button mPositiveButton;
public void setNicknameDialogListener(NicknameDialogListener listener) {
mListener = listener;
}
#Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Set the title
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle(R.string.pick_nickname);
// Inflate the custom content
View dialogView = getActivity().getLayoutInflater().inflate(R.layout.nickname_dialog_layout, null);
builder.setView(dialogView);
mNicknameEditText = (EditText) dialogView.findViewById(R.id.nickname);
builder.setPositiveButton(R.string.great, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
if (mListener != null) {
mListener.onNicknamePicked(mNicknameEditText.getText().toString());
}
}
});
builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
if (mListener != null) {
mListener.onPickerCanceled();
}
}
});
final AlertDialog dialog = builder.create();
dialog.setOnShowListener(new DialogInterface.OnShowListener() {
#Override
public void onShow(DialogInterface dialogInterface) {
mPositiveButton = dialog.getButton(Dialog.BUTTON_POSITIVE);
mPositiveButton.setEnabled(false);
}
});
mNicknameEditText.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) { }
#Override
public void afterTextChanged(Editable s) {
mPositiveButton.setEnabled(s.length() != 0);
}
});
return dialog;
}
}
This is the Activity code
public class ChatActivity extends Activity implements NicknamePickerDialog.NicknameDialogListener {
private String mNickname;
private TextView mWelcomeTextView;
private NicknamePickerDialog mDialog;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.chat_activity_layout);
mWelcomeTextView = (TextView) findViewById(R.id.welcome);
mDialog = new NicknamePickerDialog();
mDialog.setNicknameDialogListener(this);
}
private void showNicknamePickerDialog() {
mDialog.show(getFragmentManager(), NicknamePickerDialog.TAG);
}
#Override
public void onNicknamePicked(String nickname) {
mNickname = nickname;
mWelcomeTextView.setText("Welcome " + nickname + "!");
}
#Override
public void onPickerCanceled() {
if (mNickname == null) {
finish();
}
}
#Override
protected void onResume() {
super.onResume();
if (mNickname == null) {
showNicknamePickerDialog();
};
}
#Override
protected void onPause() {
super.onPause();
mDialog.dismiss();
}
}
At first I suspected that it probably happens because I am calling the DialogFragment's show method inside the activity's onCreate() callback (as it might be too soon), but postponing it to as late as onResume() does not solve the problem. This issue also occurs on orientation changes, leaving the background behind the dialog black. I am sure I am doing something wrong but I really can't find out what that is.
I am seriously not getting that what you are trying to do. but one thing you have done the wrong is that.
Do overide method OnCreateView() in class NicknamePickerDialog and do the below
// Inflate the custom content
View dialogView = getActivity().getLayoutInflater().inflate(R.layout.nickname_dialog_layout, null);
builder.setView(dialogView);
mNicknameEditText = (EditText) dialogView.findViewById(R.id.nickname);
mNicknameEditText.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) { }
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) { }
#Override
public void afterTextChanged(Editable s) {
mPositiveButton.setEnabled(s.length() != 0);
}
});
return dialogView;
also your alert dialog will not work . better create buttons and title you can in onCreateDialog().
dialog.setTitle(R.string.pick_nickname);
Hope this will work.

OnClick for Floating Action Button

I'm new to working with floating action button and trying to get a few of the basic things working today. Currently I am stuck on getting the onClick functionality to work. I pulled most of the code from googles FAB basic example, and in there it has an onChecked method which sends a string to a logger to show you have clicked it.
#Override
public void onCheckedChanged(FloatingActionButton fabView, boolean isChecked) {
// When a FAB is toggled, log the action.
switch (fabView.getId()){
case R.id.fab_1:
break;
default:
break;
}
}
I was thinking I'd be able to replace the functionality in there but that had no affect. So I tried to create the onClickListener like you would with any other button but that also had no affect. I am not sure how to continue since neither option worked. my goal is just to produce a dialog when the floating action button is clicked, but for now I am just trying to use a placeholder alert dialog.
This is the FloatingActionButtonFragment class:
public class FloatingActionButtonFragment extends Fragment implements FloatingActionButton.OnCheckedChangeListener {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fab_layout, container, false);
// Make this {#link Fragment} listen for changes in both FABs.
FloatingActionButton fab1 = (FloatingActionButton) rootView.findViewById(R.id.fab_1);
fab1.setOnCheckedChangeListener(this);
fab1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage("Are you sure?")
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
}
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// User cancelled the dialog
}
});
// Create the AlertDialog object and return it
AlertDialog dialog = builder.create();
dialog.show();
}
});
return rootView;
}
#Override
public void onCheckedChanged(FloatingActionButton fabView, boolean isChecked) {
// When a FAB is toggled, log the action.
switch (fabView.getId()){
case R.id.fab_1:
break;
default:
break;
}
}
}
And here is the FloatingActionButton class:
public class FloatingActionButton extends FrameLayout implements Checkable {
/**
* Interface definition for a callback to be invoked when the checked state
* of a compound button changes.
*/
public static interface OnCheckedChangeListener {
/**
* Called when the checked state of a FAB has changed.
*
* #param fabView The FAB view whose state has changed.
* #param isChecked The new checked state of buttonView.
*/
void onCheckedChanged(FloatingActionButton fabView, boolean isChecked);
}
/**
* An array of states.
*/
private static final int[] CHECKED_STATE_SET = {
android.R.attr.state_checked
};
private static final String TAG = "FloatingActionButton";
// A boolean that tells if the FAB is checked or not.
private boolean mChecked;
// A listener to communicate that the FAB has changed it's state
private OnCheckedChangeListener mOnCheckedChangeListener;
public FloatingActionButton(Context context) {
this(context, null, 0, 0);
}
public FloatingActionButton(Context context, AttributeSet attrs) {
this(context, attrs, 0, 0);
}
public FloatingActionButton(Context context, AttributeSet attrs, int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}
public FloatingActionButton(Context context, AttributeSet attrs, int defStyleAttr,
int defStyleRes) {
super(context, attrs, defStyleAttr);
setClickable(true);
// Set the outline provider for this view. The provider is given the outline which it can
// then modify as needed. In this case we set the outline to be an oval fitting the height
// and width.
setOutlineProvider(new ViewOutlineProvider() {
#Override
public void getOutline(View view, Outline outline) {
outline.setOval(0, 0, getWidth(), getHeight());
}
});
// Finally, enable clipping to the outline, using the provider we set above
setClipToOutline(true);
}
/**
* Sets the checked/unchecked state of the FAB.
* #param checked
*/
public void setChecked(boolean checked) {
// If trying to set the current state, ignore.
if (checked == mChecked) {
return;
}
mChecked = checked;
// Now refresh the drawable state (so the icon changes)
refreshDrawableState();
if (mOnCheckedChangeListener != null) {
mOnCheckedChangeListener.onCheckedChanged(this, checked);
}
}
/**
* Register a callback to be invoked when the checked state of this button
* changes.
*
* #param listener the callback to call on checked state change
*/
public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {
mOnCheckedChangeListener = listener;
}
#Override
public boolean isChecked() {
return mChecked;
}
#Override
public void toggle() {
setChecked(!mChecked);
}
/**
* Override performClick() so that we can toggle the checked state when the view is clicked
*/
#Override
public boolean performClick() {
toggle();
return super.performClick();
}
#Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
// As we have changed size, we should invalidate the outline so that is the the
// correct size
invalidateOutline();
}
#Override
protected int[] onCreateDrawableState(int extraSpace) {
final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
if (isChecked()) {
mergeDrawableStates(drawableState, CHECKED_STATE_SET);
}
return drawableState;
}
}
There isn't much to either class at this point, they are mostly husks, but I just want to get this basic functionality down before I continue, and being the noob I am, I don't know why this wouldn't work.
If you are not already heading for deadline, you must change the floating action button to the one provided by google in design library
just follow http://android-developers.blogspot.in/2015/05/android-design-support-library.html
Add to the XML Layout:
<android.support.design.widget.FloatingActionButton
android:id="#+id/myFAB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/your_icon"
app:elevation="4dp"
... />
Add to the code behind:
FloatingActionButton myFab = (FloatingActionButton) myView.findViewById(R.id.myFAB);
myFab.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
doMyThing();
}
});
For more details follow : FloatingActionButton example with Support Library
Actually now with android support library it was very easy to add FAB and to customize it with click listeners
FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// FAB Action goes here
}
});
Reference : http://androidgifts.com/android-material-design-floating-action-button-tutorial/
To use dialog/Alertdialog with the floating action button you're using, try changing your onClick(View v) from this
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
to
AlertDialog.Builder builder = new AlertDialog.Builder(v.getContext());

Passing String values from custom dialog to another activity

A custom dialog is being used to take in user input, and then these values are being passed to another activity using getter methods.
But when I pass the values to a method that outputs the string values to a CSV file, shipName, analystName etc the values appear as empty in the file like this, " " although I have entered the values in the dialog.
I debugged the problem by watching the String values in the debug menu's expression window, shipName and analystName but the values never update in the expression window.
I gather from this that the method i which the input is being passed over is not correct.
Does anyone know why the values being output are empty?
This the dialog class being used:
package ie.gmi.computing;
import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.renderscript.Sampler;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MyMessageDialog {
private Context context;
private EditText shipText, scientistNameText , scientistEmailText , volumeText , colourText ;
private String shipString, scientistNameString , scientistEmailString , volumeString , colourString ;
public AlertDialog displayMessage(Context context, String title, String message){
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle(title);
builder.setMessage(message);
LayoutInflater inflater = LayoutInflater.from(context);
final View v = inflater.inflate(R.layout.custom_view, null);
builder.setView(v);
shipText = (EditText)v.findViewById(R.id.shipNameEditText);
scientistNameText = (EditText)v.findViewById(R.id.scientistEditText);
scientistEmailText = (EditText)v.findViewById(R.id.emailEditText);
volumeText = (EditText)v.findViewById(R.id.volumeEditText);
colourText = (EditText)v.findViewById(R.id.colourEditText);
builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
AlertDialog dialog= builder.create();
dialog.show();
Button tb = dialog.getButton(DialogInterface.BUTTON_POSITIVE);
tb.setOnClickListener(new CustomListener(dialog));
return dialog;
}
//getter/setters to allow access to string values
//in SearchResult class
public EditText getShipText() {
return shipText;
}
public void setShipText(EditText shipText) {
this.shipText = shipText;
}
public EditText getScientistNameText() {
return scientistNameText;
}
public void setScientistNameText(EditText scientistNameText) {
this.scientistNameText = scientistNameText;
}
public EditText getScientistEmailText() {
return scientistEmailText;
}
public void setScientistEmailText(EditText scientistEmailText) {
this.scientistEmailText = scientistEmailText;
}
public String getShipString() {
return shipString;
}
public void setShipString(String shipString) {
this.shipString = shipString;
}
public String getScientistNameString() {
return scientistNameString;
}
public void setScientistNameString(String scientistNameString) {
this.scientistNameString = scientistNameString;
}
public String getScientistEmailString() {
return scientistEmailString;
}
public void setScientistEmailString(String scientistEmailString) {
this.scientistEmailString = scientistEmailString;
}
public String getVolumeString() {
return volumeString;
}
public void setVolumeString(String volumeString) {
this.volumeString = volumeString;
}
public String getColourString() {
return colourString;
}
public void setColourString(String colourString) {
this.colourString = colourString;
}
public EditText getVolumeText() {
return volumeText;
}
public void setVolumeText(EditText volumeText) {
this.volumeText = volumeText;
}
public EditText getColourText() {
return colourText;
}
public void setColourText(EditText colourText) {
this.colourText = colourText;
}
#SuppressLint("NewApi")
class CustomListener implements View.OnClickListener {
private final Dialog dialog;
public CustomListener(Dialog dialog) {
this.dialog = dialog;
}
#SuppressLint("NewApi")
#Override
public void onClick(View v) {
if(shipText.getText().toString().isEmpty() && !shipText.getText().toString().equals(null)){
shipText.setError("The Field is required");
}else if(scientistNameText.getText().toString().isEmpty() && !scientistNameText.getText().toString().equals(null)){
scientistNameText.setError("The Field is required");
}else if(scientistEmailText.getText().toString().isEmpty() && !scientistEmailText.getText().toString().equals(null)){
scientistEmailText.setError("The Field is required");
}else if(volumeText.getText().toString().isEmpty() && !volumeText.getText().toString().equals(null)){
volumeText.setError("The Field is required");
}else if(colourText.getText().toString().isEmpty() && !colourText.getText().toString().equals(null)){
colourText.setError("The Field is required");
}else{
shipText.setError(null);
scientistNameText.setError(null);
scientistEmailText.setError(null);
volumeText.setError(null);
colourText.setError(null);
shipString = shipText.getText().toString();
scientistNameString = scientistNameText.getText().toString();
scientistEmailString = scientistEmailText.getText().toString();
volumeString = volumeText.getText().toString();
colourString = colourText.getText().toString();
Toast.makeText(dialog.getContext(), "The Values you get from : " +
"\n Ship name value: " + shipText.getText().toString() +
"\n Scientist name value: " + scientistNameText.getText().toString() +
"\n email value: " + scientistEmailText.getText().toString() +
"\n sample volume value: " + volumeText.getText().toString() +
"\n sample colour value: " + colourText.getText().toString() , Toast.LENGTH_SHORT).show();
dialog.dismiss();
}
}
}
}
And this is how I'm retrieving the values in my SearchResult class, when i select the settings button:
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_settings:
MyMessageDialog dialog =new MyMessageDialog();
dialog.displayMessage(SearchResult.this, "Sample Info", "Required");
// store / use the values here
shipName = dialog.getShipString();
analystName = dialog.getScientistNameString();
analystEmail = dialog.getScientistEmailString();
sampleVolume = dialog.getVolumeString();
sampleColour = dialog.getColourString();
longitudeValue = String.valueOf(lng);
latitudeValue = String.valueOf(lat);
sampleMaterial = message;
return true;
default:
return super.onOptionsItemSelected(item);
}
}
Your dialog showing is asynchronous; that is, code execution in onOptionsItemSelected() does not pause after the call to dialog.displayMessage(), so the getters are returning the initial values for those fields, which is null in all cases. You should create an interface that the Activity implements to receive a callback after those fields are set in the onClick() method of your CustomListener, and update the Activity's variables then.
In the dialog class, we create an interface. For example:
public class MyMessageDialog {
public interface DialogCallback {
public void onValuesSet();
}
...
}
Be sure to save a reference to the Context:
public AlertDialog displayMessage(Context context, String title, String message){
this.context = context;
...
}
And at the end of the onClick() method, after the fields' values are set:
((DialogCallback) context).onValuesSet();
The Activity needs to implement the interface we created, the dialog should be a class member, and the fields will be set in the interface's callback method:
public class SearchResult extends Activity
implements MyMessageDialog.DialogCallback {
...
MyMessageDialog dialog;
#Override
public void onValuesSet()
{
shipName = dialog.getShipString();
analystName = dialog.getScientistNameString();
...
}
...
}
Does anyone know why the values being output are empty?
Because all statements from getting data from dialog class is executing after dialog.displayMessage on menu option section.
How to get data from MyMessageDialog on Ok button click ?
1. Instead of getting EditText from MyMessageDialog change all getter/setter method return type to String..
2. Create a event Listener using interface for getting event of Alert close on Ok button click in Activity. you can create event listener as:
Android Custom Event Listener
3. call all setter method on Ok button click of Alert. after calling all setter method call event listener method to execute event in Activity after Alert finish.:
#Override
public void onClick(DialogInterface dialog, int which) {
setShipText(shipText.getText().toString());
setScientistNameText(shipText.getText().toString());
....
//..close alert and call event listener method
}
Your getters don't seem to actually call the getText() method on each EditText view. Modify them do that they do (e.g., scientistNameText.getText()).
PS And, yes, Mike M may indeed write about asyncronicity contributing to the problem. Another approach around that would be to add something like this to the code for each EditText view:
myEditTextView.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
#Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
}
#Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
//Set the variable here that you call in your getter. Use `getText()` to get the string (e.g., myGetterVariable = myEditTextView.getText().
}
}

Get and Put extra, DialogFragment

I'm writing an app where the user describes a problem and then receives advice. The user presses a button which shows a dialog with an EditText. Once the user presses OK, I want to get their input, but I'm having trouble with the extras. I've read similar questions, but I can't seem to find the problem. On a summary screen where I display the information, no text ever appears. Any help is appreciated!
I think the problem is when I call getText() on the EditText. Using log.d the mText is just an empty String.
Here is my code:
The fragment AdviceFragment from which the dialog is called:
private static final String DIALOG_TEXT = "text";
private static final int REQUEST_TEXT = 0;
private Advice mAdvice;
private boolean hasText;
...
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState)
{
...
mTextButton = (Button) v.findViewById(R.id.textButton);
mTextButton.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
FragmentManager fm = getActivity().getSupportFragmentManager();
InputTextFragment dialog = new InputTextFragment();
dialog.setTargetFragment(AdviceFragment.this, REQUEST_TEXT);
dialog.show(fm, DIALOG_TEXT);
}
});
}
...
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (resultCode != Activity.RESULT_OK)
{
return;
}
if (resultCode == REQUEST_TEXT)
{
String text = data.getStringExtra(InputTextFragment.EXTRA_TEXT);
if (text.length() > 0)
{
mAdvice.setText(text);
hasText = true;
}
else
{
mAdvice.setText(null);
hasText = false;
}
}
InputTextFragment dialog:
public class InputTextFragment extends DialogFragment
{
public static final String EXTRA_TEXT = "text";
private String mText;
private void sendResult(int resultCode)
{
if (getTargetFragment() == null)
{
return;
}
Intent i = new Intent();
i.putExtra(EXTRA_TEXT, mText.toString());
getTargetFragment().onActivityResult(getTargetRequestCode(), resultCode, i);
}
#Override
public Dialog onCreateDialog(Bundle savedInstanceState)
{
View v = getActivity().getLayoutInflater().inflate(R.layout.dialog_input_text, null);
final EditText editText = new EditText(getActivity());
return new AlertDialog.Builder(getActivity())
.setView(v)
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener()
{
#Override
public void onClick(DialogInterface dialog, int whichButton)
{
String input = editText.getText().toString();
if (input.length() > 0)
{
mText = input;
}
else
{
return;
}
sendResult(Activity.RESULT_OK);
}
})
.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener()
{
...
})
.create();
}
}
final EditText editText = new EditText(getActivity());
You problem is here, your EditText is not added to your Dialog's View Tree. I think you should do like this:
final EditText editText = (EditText)v.findViewById(your_edittext_id);
Thanks, I think this has fixed part of the problem. Using log.d in the
onClick() method of setPositiveButton()shows that it is successfully
assigning the value. However, I'm still not getting anything when I
call onActivityResult(). Do you have any idea what's going wrong?
Look here, another typo problem:
if (resultCode == REQUEST_TEXT)
{
It should be requestCode.
I think this should fix your problem, but you'd better follow bean_droid's suggest and use an interface instead of calling the onActivityResult() method. It's because that method may be called by other part of your code, which you don't want.
Here try this:
Public class AdviceFragment extends Fragment implements OkClickListener{
#Override
Public void onClick(String data){
//DO YOUR CODE HERE
}
}
InputTextFragment
Public Class InputTextFragment extends DialogFragment{
public interface OkClickListener{
public void onClick(String data);
}
#Override
public Dialog onCreateDialog(Bundle savedInstanceState)
{
View v = getActivity().getLayoutInflater().inflate(R.layout.dialog_input_text, null);
final EditText editText = new EditText(getActivity());
return new AlertDialog.Builder(getActivity())
.setView(v)
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener()
{
#Override
public void onClick(DialogInterface dialog, int whichButton)
{
String input = editText.getText().toString();
if (input.length() > 0)
{
mText = input;
}
else
{
return;
}
((OkClicklistener)getTargetFragment()).onClick(data);
}
})
.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener()
{
...
})
.create();
}
}
}
replace sendResult(Activity.RESULT_OK); to getActivity().setResult(resultCode);

How to get selected item in Spinner

I keep going round in circles with this one. I have managed to set the spinner to show item in the list if it matches a record in the database, but now have an issue with getting the selected item from the spinner when I save the record. I instead get something like 'android.database.sqlite.SQLiteCursor#44fa41b0'.
In my saveInspection() method, I am using inspectedBySpinner.getSelectedItem().toString(); (as detailed in second answer in this post How do you get the selected value of a Spinner?) with no success.. (so close yet no banana!).
I'm sure this is something flippin obvious, but help much appreciated:
public class InspectionEdit extends Activity {
final Context context = this;
private EditText inspectionReferenceEditText;
private EditText inspectionCompanyEditText;
private Button inspectionDateButton;
private Spinner inspectedBySpinner;
private Button saveButton;
private Button cancelButton;
protected boolean changesMade;
private AlertDialog unsavedChangesDialog;
private Button addInspectorButton;
private int mYear;
private int mMonth;
private int mDay;
private StringBuilder mToday;
private RMDbAdapter rmDbHelper;
private long inspectionId;
private String inspectedBySpinnerData;
//private String inspectors;
static final int DATE_DIALOG_ID = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
rmDbHelper = new RMDbAdapter(this);
rmDbHelper.open();
Intent i = getIntent();
inspectionId = i.getLongExtra("Intent_InspectionID", -1);
setContentView(R.layout.edit_inspection);
setUpViews();
populateFields();
fillSpinner();
setTextChangedListeners();
}
private void setUpViews() {
inspectionReferenceEditText =(EditText)findViewById(R.id.inspection_reference);
inspectionCompanyEditText =(EditText)findViewById(R.id.inspection_company);
inspectionDateButton =(Button)findViewById(R.id.inspection_date);
inspectedBySpinner =(Spinner)findViewById(R.id.inspected_by_spinner);
addInspectorButton = (Button)findViewById(R.id.add_inspector_button);
saveButton = (Button)findViewById(R.id.inspection_save_button);
cancelButton = (Button)findViewById(R.id.inspection_cancel_button);
}
private void populateFields() {
if (inspectionId > 0) {
Cursor inspectionCursor = rmDbHelper.fetchInspection(inspectionId);
startManagingCursor(inspectionCursor);
inspectionReferenceEditText.setText(inspectionCursor.getString(
inspectionCursor.getColumnIndexOrThrow(RMDbAdapter.INSPECTION_REF)));
inspectionCompanyEditText.setText(inspectionCursor.getString(
inspectionCursor.getColumnIndexOrThrow(RMDbAdapter.INSPECTION_COMPANY)));
inspectionDateButton.setText(inspectionCursor.getString(
inspectionCursor.getColumnIndexOrThrow(RMDbAdapter.INSPECTION_DATE)));
inspectedBySpinnerData = inspectionCursor.getString(
inspectionCursor.getColumnIndexOrThrow(RMDbAdapter.INSPECTION_BY));
Toast.makeText(getApplicationContext(), inspectedBySpinnerData,
Toast.LENGTH_LONG).show();
}
}
private void fillSpinner() {
Cursor inspectorCursor = rmDbHelper.fetchAllInspectors();
startManagingCursor(inspectorCursor);
// create an array to specify which fields we want to display
String[] from = new String[]{RMDbAdapter.INSPECTOR_NAME};
//INSPECTOR_NAME = "inspector_name"
// create an array of the display item we want to bind our data to
int[] to = new int[]{android.R.id.text1};
// create simple cursor adapter
SimpleCursorAdapter spinnerAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_spinner_item, inspectorCursor, from, to );
spinnerAdapter.setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item );
// get reference to our spinner
inspectedBySpinner.setAdapter(spinnerAdapter);
if (inspectionId > 0) {
int spinnerPosition = 0;
for (int i = 0; i < inspectedBySpinner.getCount(); i++)
{
Cursor cur = (Cursor)(inspectedBySpinner.getItemAtPosition(i));
//--When your bind you data to the spinner to begin with, whatever columns you
//--used you will need to reference it in the cursors getString() method...
//--Since "getString()" returns the value of the requested column as a String--
//--(In my case) the 4th column of my spinner contained all of my text values
//--hence why I set the index of "getString()" method to "getString(3)"
String currentSpinnerString = cur.getString(1).toString();
if(currentSpinnerString.equals(inspectedBySpinnerData.toString()))
{
//--get the spinner position--
spinnerPosition = i;
break;
}
}
inspectedBySpinner.setSelection(spinnerPosition);
}
}
private void addInspector() {
// get prompts.xml view
LayoutInflater li = LayoutInflater.from(context);
View promptsView = li.inflate(R.layout.prompt_dialog, null);
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
context);
// set prompts.xml to alertdialog builder
alertDialogBuilder.setView(promptsView);
final EditText userInput = (EditText) promptsView
.findViewById(R.id.editTextDialogUserInput);
// set dialog message
alertDialogBuilder
.setCancelable(false)
.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// get user input and set it to result
// edit text
String inspector = userInput.getText().toString();
rmDbHelper.createInspector(inspector);
}
})
.setNegativeButton("Cancel",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
dialog.cancel();
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
private void setTextChangedListeners() {
changesMade = false;
inspectionReferenceEditText.addTextChangedListener(new TextWatcher(){
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
changesMade = true;
}
});
inspectionCompanyEditText.addTextChangedListener(new TextWatcher(){
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
changesMade = true;
}
});
inspectionDateButton.addTextChangedListener(new TextWatcher(){
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
changesMade = true;
}
});
inspectionDateButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
showDialog(DATE_DIALOG_ID);
}
});
addInspectorButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
addInspector();
}
});
saveButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
saveInspection();
finish();
}
});
cancelButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
cancel();
}
});
}
protected void saveInspection() {
String reference = inspectionReferenceEditText.getText().toString();
String companyName = inspectionCompanyEditText.getText().toString();
String inspectionDate = RMUtilities.compareTwoStringsNullIfSame(inspectionDateButton.getText().toString(), "Click to add");
String inspectedBy = inspectedBySpinner.getSelectedItem().toString();
Toast.makeText(getApplicationContext(), inspectedBy,
Toast.LENGTH_LONG).show();
if (inspectionId > 0) {
rmDbHelper.updateInspection(inspectionId, reference, companyName, inspectionDate, inspectedBy);
Toast.makeText(getApplicationContext(), "Inspection updated",
Toast.LENGTH_LONG).show();
}
else {
rmDbHelper.createInspection(reference, companyName, inspectionDate, inspectedBy);
Toast.makeText(getApplicationContext(), "Inspection created",
Toast.LENGTH_LONG).show();
}
}
As you use a CursorAdapter and not an Adapter based on a List or Array of String, you'll have to use the Cursor to fetch the value of the selected item. The Spinner's getSelectedItem will call the CursorAdapter's getItem(position) which will return the Cursor object. So instead to using toString(), first cast the returned object to a Cursor and then use Cursor's get... methods to fetch the required data of the selected item.
EDIT
Based on how you fill your spinner you'll probably need this:
String inspectedBy = ((Cursor)inspectedBySpinner.getSelectedItem())
.getString(1).toString();

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