Android 6.0 Dialog text doesn't appear

问题

I updated my phone to Android 6.0 and I have these 2 problems with dialogs:

1)The title is shown but the messages isn't for alert dialog(SOLVED):

        new AlertDialog.Builder(context).setTitle("Title").setMessage("Message");

2)Also custom dialog fragment's title is not shown(NOT SOLVED):

        getDialog().setTitle("Title");

There was not such a problem in lollipop or in older versions, the problem appeared only after updating my phone to marshmallow.

How to solve the problem?

回答1:

Use constructor with theme for Lollipop and newer android versions:

Dark theme

    AlertDialog.Builder builder;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        builder = new AlertDialog.Builder(context, android.R.style.Theme_Material_Dialog_Alert);
    } else {
        builder = new AlertDialog.Builder(context);
    }

And for Light theme

    AlertDialog.Builder builder;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        builder = new AlertDialog.Builder(context, android.R.style.Theme_Material_Light_Dialog_Alert);
    } else {
        builder = new AlertDialog.Builder(context);
    }

回答2:

I've come across a few answers that say that you should use the following in your app theme:

<item name="android:alertDialogTheme">@style/Theme.AppCompat.Light.Dialog.Alert</item>

While that is correct, it wasn't working in all places for me. Eventually, I realized that in some places I was using the regular AlertDialog builder and in other places I was using the support builder. If you are using the support AlertDialog, make sure to also include the following in your theme:

<item name="alertDialogTheme">@style/Theme.AppCompat.Light.Dialog.Alert</item>

回答3:

Just put this in your styles file inside your Base Theme style tag and you are good to go

<item name="android:alertDialogTheme">@style/Theme.AppCompat.Light.Dialog.Alert</item>

回答4:

Answer for 2), we need to call setStyle() before onCreateDialog() because theme is used in onCreateDialog()

@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        setStyle(STYLE_NORMAL, android.R.style.Theme_Material_Light_Dialog_Alert);
    }
    Dialog dialog = super.onCreateDialog(savedInstanceState);
    dialog.setTitle(R.string.dialog_title);
    return dialog;
}

回答5:

i tried to fix this problem by making a style of my own.

your dialog object should be like this and your style pointed to this Dialog will be written below

new AlertDialog.Builder(new ContextThemeWrapper(Context, R.style.Dialog))
            .setTitle("Title")
            .setMessage("Sample Message ...").show();

R.style.Dialog ::

<style name="Dialog">
    <item name="android:textColorPrimary">@color/primary_text</item>
    <item name="android:textColor">@color/primary_color</item>
</style>

Colors ::

<color name="primary_text">#212121</color>
<color name="primary_color">#2196f3</color>

finally the output should be something like this

Note : "android:textColorPrimary" goes for dialog setMessage and "android:textColor" goes for dialog setTitle ; i do not use setPositive and setNegative button and listener in my dialog object but you can see them in the picture if you want you can make your own dialog object.

回答6:

new AlertDialog.Builder(context)
    .setTitle("Delete entry")
    .setMessage("Are you sure you want to delete this entry?")
    .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) { 
            // continue with delete
        }
     })
    .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) { 
            // do nothing
        }
     })
    .setIcon(android.R.drawable.ic_dialog_alert)
     .show();

Hope this will help you.............

回答7:

I suspect that you are ending up showing white text on a white background! (Looking at the screenshot, the (i) icon is not showing up well either, suggesting that it was designed to be shown on a background other than white.

You can use the constructor public AlertDialog.Builder (Context context, int themeResId) to ensure you are using a specific theme to style your dialog, where the Theme_Material_Dialog is probably what you want.

回答8:

Maybe your main text color is the same as dialog background color, in that case in your styles.xml use (just an example):

<style name="AlertDialog" parent="@android:style/Theme.Material.Light.Dialog.Alert">
    <item name="android:textColor">#000000</item>
</style>

and in dialog creation:

new AlertDialog.Builder(
        new ContextThemeWrapper(getContext(), R.style.AlertDialog))
).setMessage("test");

回答9:

When using DialogFragment you need to

1. Add style

   <style name="CustomDialog" parent="@style/Theme.AppCompat.Light.Dialog">
       <item name="android:windowNoTitle">false</item>
   </style>
   

2. In your DialogFragment add getTheme

   public class CustomDialogFragment extends DialogFragment{
       public int getTheme() { 
           return R.style.CustomDialogFragment; 
       }
       .
       .
       .
   

And that's it!

回答10:

@Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        // Use the Builder class for convenient dialog construction
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setMessage(R.string.dialog_fire_missiles)
               .setPositiveButton(R.string.fire, new DialogInterface.OnClickListener() {
                   public void onClick(DialogInterface dialog, int id) {
                       // FIRE ZE MISSILES!
                   }
               })
               .setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
                   public void onClick(DialogInterface dialog, int id) {
                       // User cancelled the dialog
                   }
               });
        // Create the AlertDialog object and return it
        return builder.create();
    }

Once check this hope this will work.......

回答11:

In my case all dialogs had the same color as fonts (title & message). What I have done to fix this state was the change of the color attribute in my theme. I copied the xml theme file into the 'res/values-v22' and set different color for marshmallow.

<resources>
    <style name="LywCompatTheme" parent="@style/Theme.AppCompat.Light.NoActionBar">
        <item name="android:textColorPrimary">@android:color/tertiary_text_dark</item>
    </style>
</resources>

or only for dialogs

<resources>
    <style name="LywCompatTheme" parent="@style/Theme.AppCompat.Light.NoActionBar">
        <item name="android:alertDialogTheme">@style/LywAlertDialogStyle</item>
    </style>
    <style name="LywAlertDialogStyle" parent="Base.Theme.AppCompat.Light.Dialog.Alert">
        <item name="android:textColorPrimary">@color/lyw_secondary_text_color</item>
    </style>
</resources>

来源：https://stackoverflow.com/questions/33228454/android-6-0-dialog-text-doesnt-appear