I'm trying to generate a custom dialog in Android. I create my Dialog like this:
dialog = new Dialog(this); dialog.setContentView(R.layout.my_dialog);
Everythings works fine except for the title of the Dialog. Even if I don't set the title of the dialog the dialog popup has a blank space at the position of the dialog.
Is there any way to hide this part of the Dialog?
I tried it with an AlertDialog but it seems the layout is not set properly:
LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View view = inflater.inflate(R.layout.map_dialog, null); AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setView(view); // dialog = new Dialog(this); // dialog.setContentView(R.layout.map_dialog); dialog = builder.create(); ((TextView) dialog.findViewById(R.id.nr)).setText(number);
If I use this code I get a null Pointer Exception in the last line. The dialog is not null so the TextView I try to retrieve does not exist.
If I uncomment the part where I use the Dialog Constructor everything works fine but for the title above my dialog layout.
You can hide the title of a dialog using:
Previous version of this answer, which is overcomplicated:
You need to use an
AlertDialog. There's a good explanation on the Android Developer's site about custom dialogs.
In very short summary, you do this with code like copied below from the official website. That takes a custom layot file, inflates it, gives it some basic text and icon, then creates it. You'd show it then with
AlertDialog.Builder builder; AlertDialog alertDialog; Context mContext = getApplicationContext(); LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(LAYOUT_INFLATER_SERVICE); View layout = inflater.inflate(R.layout.custom_dialog, (ViewGroup) findViewById(R.id.layout_root)); TextView text = (TextView) layout.findViewById(R.id.text); text.setText("Hello, this is a custom dialog!"); ImageView image = (ImageView) layout.findViewById(R.id.image); image.setImageResource(R.drawable.android); builder = new AlertDialog.Builder(mContext); builder.setView(layout); alertDialog = builder.create();
In response to comment:
I assume that TextView with the id
nr is in the View you are inflating with
View view = inflater..... If so, then you need to change just one bit: instead of
dialog.findView... make it
view.findView.... Then once you've done that, remember to use dialog.show(), or even builder.show() without bothering to do builder.create().
FEATURE_NO_TITLE works when creating a dialog from scratch, as in:
Dialog dialog = new Dialog(context); dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
But it doesn't work when creating an AlertDialog (or using the Builder), because it already disables the title and use a custom one internally.
I have looked at the SDK sources, and I think that it can't be worked around. So to remove the top spacing, the only solution is to create a custom dialog from scratch IMO, by using the Dialog class directly.
Also, one can do that with a style, eg in styles.xml:
<style name="FullHeightDialog" parent="android:style/Theme.Dialog"> <item name="android:windowNoTitle">true</item> </style>
Dialog dialog = new Dialog(context, R.style.FullHeightDialog);