user1706819 user1706819 - 4 months ago 22
Android Question

AlertDIalog with two EditText fields

I am trying to create custom AlertDialog with two EditText fields for input. Here is the code:

void newItemInput(){

AlertDialog.Builder builder = new AlertDialog.Builder(this);

LayoutInflater inflater = this.getLayoutInflater();

builder.setView(inflater.inflate(R.layout.dialog_signin, null));

builder.setTitle("");
builder.setMessage("");

builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int whichButton) {

EditText item_name = (EditText)findViewById(R.id.item_name);
EditText item_price =(EditText)findViewById(R.id.item_price);

String text = item_name.getText().toString();
String text_price = item_price.getText().toString();
int price = Integer.parseInt(text_price);

// Do something with value!
products.add(new Product(text, price, R.drawable.unread, false));

}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {

}
});
builder.show();
}


AlertDialog
shows up and I can input data. But when I press OK, while passing text and price as arguments to
products.add(new Product(text, price, R.drawable.unread, false))
, app crashes down.
Here is the layout file:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<EditText
android:id="@+id/item_name"
android:inputType="text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:layout_marginBottom="4dp"/>
<EditText
android:id="@+id/item_price"
android:inputType="number"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:layout_marginBottom="16dp"/>
</LinearLayout>


Please let me know, what am I doing wrong. When I do not use custom Dialog and use only one text field it works fine. But I need two fields, and I am assuming that this crash because of
LayoutInflater
.

Answer

Firstly, in the future, when you receive LogCat errors, please post them.

Best solution is to cast the dialog to an AlertDialog, then use that.

AlertDialog aDialog = (AlertDialog) dialog; // This will ONLY work if (dialog instanceof AlertDialog)
EditText item_name = (EditText) aDialog.findViewById(R.id.item_name);
EditText item_price =(EditText) aDialog.findViewById(R.id.item_price);

Alternatively, if the above doesn't work, you can save the View you give to the builder, then use that instead.

Like so, using a final modifier to access within the OnClickListener:

final View v = inflater.inflate(R.layout.dialog_signin, null);
builder.setView(v);

Then, access v.findViewById within the OnClickListener to find the views.