如何创建没有标题的DialogFragment？

Question

我正在创建一个DialogFragment来显示有关我的应用程序的一些帮助消息.一切工作正常,除了一两件事:有一个在,显示DialogFragment窗口顶部的黑色条纹,那我相信是留给冠军,这是我不想用.

这是特别痛苦的,因为我的自定义DialogFragment使用白色背景,所以这种变化太臭名昭着,不能放在一边.

让我以更加图形化的方式向您展示:

现在我的DialogFragment的XML代码如下:

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <LinearLayout
        android:id="@+id/holding" 
        android:orientation="vertical" 
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent"
        android:background="@drawable/dialog_fragment_bg"
        >
        <!-- Usamos un LinearLayout para que la imagen y el texto esten bien alineados -->
        <LinearLayout
            android:id="@+id/confirmationToast" 
            android:orientation="horizontal" 
            android:layout_width="wrap_content" 
            android:layout_height="wrap_content"
            >

            <TextView android:id="@+id/confirmationToastText" 
            android:layout_width="wrap_content"
            android:layout_height="fill_parent" 
            android:text="@string/help_dialog_fragment"
            android:textColor="#AE0000"
            android:gravity="center_vertical"
            />

        </LinearLayout>
        <LinearLayout
            android:id="@+id/confirmationButtonLL" 
            android:orientation="horizontal" 
            android:layout_width="fill_parent" 
            android:layout_height="fill_parent"
            android:gravity="center_horizontal"
            >    
            <Button android:id="@+id/confirmationDialogButton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:layout_marginBottom="60dp"
                android:background="@drawable/ok_button">
            </Button>
        </LinearLayout>
    </LinearLayout>
</ScrollView>

以及实现DialogFragment的类的代码:

public class HelpDialog extends DialogFragment {

    public HelpDialog() {
        // Empty constructor required for DialogFragment
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        //Inflate the XML view for the help dialog fragment
        View view = inflater.inflate(R.layout.help_dialog_fragment, container);
        TextView text = (TextView)view.findViewById(R.id.confirmationToastText);
        text.setText(Html.fromHtml(getString(R.string.help_dialog_fragment)));
        //get the OK button and add a Listener
        ((Button) view.findViewById(R.id.confirmationDialogButton)).setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                 // When button is clicked, call up to owning activity.
                HelpDialog.this.dismiss();
             }
         });
        return view;
    }

}

而主要活动中的创建过程:

/**
 * Shows the HelpDialog Fragment
 */
private void showHelpDialog() {
    android.support.v4.app.FragmentManager fm = getSupportFragmentManager();
    HelpDialog helpDialog = new HelpDialog();
    helpDialog.show(fm, "fragment_help");
}

我真的不知道这个与Dialog相关的答案是否适合Android:如何创建没有标题的Dialog？

我怎样才能摆脱这个标题区域？

Answer 1

只需在您的代码中添加此行代码即可 HelpDialog.onCreateView(...)

getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);

这样你明确要求得到一个没有标题的窗口:)

编辑

由于@DataGraham和@Blundell指出,在下面的意见,它的安全添加请求标题无窗的onCreateDialog()方法,而不是onCreateView().这样,当您不使用片段时,可以防止令人讨厌的NPE Dialog:

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
  Dialog dialog = super.onCreateDialog(savedInstanceState);

  // request a window without the title
  dialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
  return dialog;
}

Answer 2

Dialog片段有setStyle方法,应该在视图创建Java Doc之前调用.也可以使用相同的方法设置对话框的样式

public static MyDialogFragment newInstance() {
        MyDialogFragment mDialogFragment = new MyDialogFragment();
        //Set Arguments here if needed for dialog auto recreation on screen rotation
        mDialogFragment.setStyle(DialogFragment.STYLE_NO_TITLE, 0);
        return mDialogFragment;
}

Answer 3

FragmentManager manager = getSupportFragmentManager();
SettingsDialog sd = new SettingsDialog();
sd.setStyle(DialogFragment.STYLE_NO_TITLE, 0);
sd.show(manager, "settings_dialog");

Answer 4

尝试简单的方法

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setStyle(STYLE_NO_TITLE, 0);
}

Answer 5

public class LoginDialog extends DialogFragment {   
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.login_dialog, null);
        getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);
        return view;
    }   
}

Answer 6

将样式设置为Theme_Holo_Dialog_NoActionBar:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setStyle(STYLE_NORMAL, android.R.style.Theme_Holo_Dialog_NoActionBar);
}