Android Layout, view height is equal to screen siz

问题:

in Android how to make a view have same height as its screen size, is it possible to achieve this with only the xml? or if it must use script, tell me how

Thanks.

---

Sorry for being not clear, and thanks for your reply

but i think, match_parent and fill_parent attribute is not reliable, because when i put the view inside one container or change the view container hierarchy, it won't work.

Here my complete xml layout.

The element i want to make the height sam with device screen is the last list view inside relative layout

回答1:

No you cannot achieve this in XML only.

As android support multiple screen sizes, At runtime you need to check for each device , the height for each device can be calculated like this

Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int height = size.y;

With above code you will get the height of screen and you need to set this height in dp to your view at runtime.

Do this in your activity

        // get view you want to resize
        LinearLayout mainLayout = (LinearLayout) findViewById(R.id.main); 

        // get layout parameters for that view
        ViewGroup.LayoutParams params = mainLayout.getLayoutParams();

        // change height of the params e.g. 480dp
        params.height = 480;

        // initialize new parameters for my element
        mainLayout.setLayoutParams(new LinearLayout.LayoutParams(params));

回答2:

We can dynamically get device screen height and set as view height

回答3:

Display screenDisplay = getActivity().getWindowManager().getDefaultDisplay();
LayoutHeight = screenDisplay.getHeight();
LinearLayout.LayoutParams listLayoutParams = new LinearLayout.LayoutParams(
                    LayoutHeight, LinearLayout.LayoutParams.WRAP_CONTENT);
view.setLayoutParams(listLayoutParams);

回答4:

use

android:layout_height = "match_parent"

instead of

android:layout_height = "wrap_content"

回答5:

This can be possible from xml layout. To do this make the parent layout height and width fill_parent or match_parent and then set each child view width fill_parent or match_parent. Don't set any padding or margin to parent layout. Hope it will work. Here I am giving you an example:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/btn_swap"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Left or Right" />

    <SurfaceView
        android:id="@+id/my_surface"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

</LinearLayout>

Attention: If you use ScrollView, you have to set fillViewport="true" otherwise it will not work. A Google engineer said about it before. Check it from here