AlertDialog: How To Remove Black Borders Above and Below View

Question

This question has been asked before: AlertDialog custom title has black border

But was not answered satisfactorily - and is missing some information.

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I

Answer 1

Just to make Steve's answer more clear, this can be done easily. For example in my case the view I was setting in the dialog was a WebView.

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {

    WebView webView = new WebView(getActivity());
    webView.loadUrl(" url to show ");


    OnClickListener clickListenerOk = new OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            ...
        }
    };

    OnClickListener clickListenerCancel = new OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            ...
        }
    };

    AlertDialog dialog = new AlertDialog.Builder(getActivity())

            .setPositiveButton("OK", clickListenerOk)

            .setNegativeButton("Cancel",clickListenerCancel)

            .create();

    dialog.setView(webView, 0, 0, 0, 0);

    return dialog;
}

Answer 2

dialog.setInverseBackgroundForced(true);

use the above in your code to remove the border of the alert dialog.

Refer this LINK for InverseBackgroundForced.

UPDATED Try this code::::

public class Welcome  extends Activity
{
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.welcome);

        AlertDialog.Builder builder = new AlertDialog.Builder(Welcome.this);
        LayoutInflater _inflater = LayoutInflater.from(Welcome.this);
        View view = _inflater.inflate(R.layout.welcomedialog,null);
        builder.setView(view);

        AlertDialog alert = builder.create();
        alert.show();
    }
}

Note:: Also try by removing android:padding="40px" from welcomedialog.xml.

Answer 3

In my case, that border was caused by the theme of the parent Activity for the AlertDialog. To get rid of the border completely, give it a different theme (in this case, Holo):

AlertDialog.Builder builder = new AlertDialog.Builder(
                                new ContextThemeWrapper(this, android.R.style.Theme_Holo)
                              );

This fixed it for me. Hope this helps!

Answer 4

setBackgroundDrawable(new ColorDrawable(0));

Call this in your dialog.

Answer 5

If you look at the AlertDialog class source you'll see most of the methods are simply proxy methods (facade) around private AlertController mAlert.

Looking at the AlertController class source you'll see 4 interesting member variables:

private int mViewSpacingLeft;
private int mViewSpacingTop;
private int mViewSpacingRight;
private int mViewSpacingBottom;
private boolean mViewSpacingSpecified = false;

Setting mViewSpacingSpecified to true will remove the borders on the top and bottom of the dialog.

This is done properly by changing this line:

dialog.setView(layout);

to:

dialog.setView(layout, 0, 0, 0, 0);