leo9r leo9r - 6 months ago 17
Android Question

Dialogs and Popups in Android

The Android design documentation in http://developer.android.com/design/building-blocks/dialogs.html makes a clear differentiation between Dialogs, Alerts, Popups and Toasts. It also recommends the implementation of Dialogs by means of the

DialogFragment
class and Toasts by means of the
Toast
class. However it's not clear to me whether Popups should be implemented with
PopupWindow
or with
DialogFragment
.

I know that
DialogFragments
usually come with Ok/Cancel buttons and that the location of
PopupWindows
can be defined, but:


Answer

If you want dialog as shown in the link, just make them by making custom dialog as mentioned below:

Make a dialog object:

Dialog dialog = new Dialog(context,android.R.style.Theme_Translucent_NoTitleBar);

Set custom view to this dialog:

show_dialog(){
    dialog.setContentView(R.layout.custom_dialog);//your custom dialog layout.
}

Your custom layout should be like this:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="fill_parent"
    android:layout_width="fill_parent"
    android:id="@+id/custom_dialog_first_rl"
    android:background="@android:color/black">
<!-- write code for rest of your UI here -->
</RelativeLayout>

Now set alpha for your first relative layout in show_dialog() like this:

show_dialog(){
    dialog.setContentView(R.layout.custom_dialog);//your custom dialog layout.
    RelativeLayout custom_dialog_first_rl=(RelativeLayout)dialog.findViewById(R.id.custom_dialog_first_rl);
        custom_dialog_first_rl.getBackground().setAlpha(170);
}

Call show_dialog() where you wanna show this dialog