How can I get a Dialog style activity window to fi

Question

I am using an activity with the dialog theme set, and I want it to be full screen. I tried all sorts of things, even going through the WindowManager to expand the window to full width and height manually, but nothing works.

Apparently, a dialog window (or an activity with the dialog theme) will only expand according to its contents, but even that doesn't always work. For instance, I show a progress bar circle which has width and height set to FILL_PARENT (so does its layout container), but still, the dialog wraps around the much smaller progress bar instead of filling the screen.

There must be a way of displaying something small inside a dialog window but have it expand to full screen size without its content resizing as well?

Answer 1

This would be helpful for someone like me. Create custom dialog style:

<style name="MyDialog" parent="Theme.AppCompat.Light.Dialog">
    <item name="windowNoTitle">true</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowIsFloating">false</item>
</style>

In AndroidManifest.xml file set theme for wanted activity:

<activity
        android:name=".CustomDialog"
        ...
        android:theme="@style/MyDialog"/>

That is all, no need to call methods programaticaly.

Answer 2

In your manifest file where our activity is defined

<activity
        android:name=".YourPopUpActivity"
        android:theme="@android:style/Theme.Holo.Dialog" >
    </activity>

without action bar

<activity android:name=".YourPopUpActivity"
            android:theme="@android:style/Theme.Holo.Dialog.NoActionBar"/>

Answer 3

I found the solution:

In your activity which has the Theme.Dialog style set, do this:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.your_layout);

    getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
}

It's important that you call Window.setLayout() after you call setContentView(), otherwise it won't work.

Answer 4

Matthias' answer is mostly right but it's still not filling the entire screen as it has a small padding on each side (pointed out by @Holmes). In addition to his code, we could fix this by extending Theme.Dialog style and add some attributes like this.

<style name="MyDialog" parent="@android:style/Theme.Dialog">
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowNoTitle">true</item>
</style>

Then we simply declare Activity with theme set to MyDialog:

<activity
    android:name=".FooActivity"
    android:theme="@style/MyDialog" />

Answer 5

Set a minimum width at the top most layout.

android:minWidth="300dp"

For example:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"
  xmlns:android="http://schemas.android.com/apk/res/android" android:minWidth="300dp">

<!-- Put remaining contents here -->

</LinearLayout>

Answer 6

For Dialog This may helpful for someone. I want a dialog to take full width of screen. searched a lot but nothing found useful. Finally this worked for me:

mDialog.setContentView(R.layout.my_custom_dialog);
mDialog.getWindow().setBackgroundDrawable(null);

after adding this, my dialog appears in full width of screen.