Can't get my DialogFragment background to be transparent

问题

I have created a custom DialogFragment like it is described in the developer guide. Now what i am trying to do sounds simple enough, but i cannot get it to work. I have defined: android:background="@android:color/transparent" in my layout xml wich i am loading like this (in my onCreateDialog):

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

LayoutInflater inflater = getActivity().getLayoutInflater();


final View view = inflater.inflate(R.layout.pausedialog, null);
setStyle(STYLE_NO_FRAME, R.style.CustomDialog);

As you can see i also tried to set a custom style in the DialogFragment wich is defined like this:

<style name="CustomDialog" parent="android:style/Theme.Dialog">
    <item name="android:windowBackground">@null</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:windowIsTranslucent">true</item> 
    <item name="android:alwaysDrawnWithCache">false</item>
    <item name="android:windowContentOverlay">@null</item>
</style>

And i also tried getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(0)); which leads to a null pointer exception.

I am using android.support.v4.app.DialogFragment. Can this be the cause? Or am i doing something else wrong?

If you need a screenshot of the dialog please let me know! Thanks

回答1:

Try to set style and theme in onCreate method of your dialogFragment class implementation.

@Override
    public void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
         int style=DialogFragment.STYLE_NO_TITLE;
         int theme=android.R.style.Theme_Translucent;
         setStyle(style, theme);
    }

if you are using Dialog class then you can also set Style and theme on dialog instance.

回答2:

This worked for me. I created a new style:

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

And then set this style in my DialogFragment's onCreate() method like this:

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

    setStyle(DialogFragment.STYLE_NO_TITLE, R.style.CustomDialog);
}

回答3:

This is the style I use to totally remove the Dialog`s background.-

<style name="Theme.Dialog" parent="@android:style/Theme.Translucent.NoTitleBar">
    <item name="android:windowFrame">@null</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowSoftInputMode">stateUnspecified|adjustPan</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:backgroundDimEnabled">true</item>
</style>

As for the Dialog creation, you're creating a DialogBuilder but then you manually inflate a view, I guess that's the problem. Try this instead.-

AlertDialog.Builder builder = new AlertDialog.Builder(new ContextThemeWrapper(this, R.style.customTheme));
AlertDialog dialog = builder.create();
dialog.show();

EDIT

Another approach is extending AlertDialog.-

public class CustomDialog extends AlertDialog {
    public DialogParent(Context context) {
        super(context, R.style.CustomDialog);
        setContentView(R.layout.pausedialog);

        // More initialization stuff    
    }
}

And then 'manually' instantiate it.-

AlertDialog dialog = new CustomDialog(getActivity());
dialog.show();

来源：https://stackoverflow.com/questions/19167185/cant-get-my-dialogfragment-background-to-be-transparent

标签

java

android

android-dialogfragment