Android AlertDialog with rounded corners

问题:

I have been trying to make my Alert Dialog with rounded corners but somehow I am not able to. I have tried and I failed. I tried to follow this blog http://blog.stylingandroid.com/archives/271 and made my styles based on that.

Btw, to add to my question now. Some of my new finding. The code in the above link just works fine on 2.3.3 (GB) but does not work at all in ICS . Some change made the code to break.

I want to avoid creating 9 patch images and thus I am using shapes. 9 patch image is the last thing that I will try.I know that android alert dialog style is using 9 patch image. I already looked that up before throwing this question.

/res/values/themes.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <style name="MyTheme" parent="@android:style/Theme.Dialog">
        <item name="android:alertDialogStyle">@style/dialog</item>
    </style>


</resources>

/res/values/styles.xml

<resources xmlns:android="http://schemas.android.com/apk/res/android">

    <style name="AppTheme" parent="android:Theme.Light" />

    <style name="myImageView">

        <!-- 3dp so the background border to be visible -->
        <item name="android:padding">3dp</item>
        <item name="android:background">@drawable/image_drawable</item>
        <item name="android:scaleType">fitCenter</item>
    </style>

    <style name="dialog">
        <item name="android:fullDark">@drawable/dialog_body</item>
        <item name="android:topDark">@drawable/dialog_title</item>
        <item name="android:centerDark">@drawable/dialog_body</item>
        <item name="android:bottomDark">@drawable/dialog_footer</item>
        <item name="android:fullBright">@drawable/dialog_body</item>
        <item name="android:centerBright">@drawable/dialog_body</item>
        <item name="android:topBright">@drawable/dialog_title</item>
        <item name="android:bottomBright">@drawable/dialog_footer</item>
        <item name="android:bottomMedium">@drawable/dialog_footer</item>
        <item name="android:centerMedium">@drawable/dialog_body</item>
    </style>

</resources>

/res/drawable/dialog_title.xml

<inset xmlns:android="http://schemas.android.com/apk/res/android"
    android:insetBottom="-1dp">
    <shape android:shape="rectangle">
        <solid android:color="#FFFFFF" />
        <corners android:topLeftRadius="5dp" android:topRightRadius="5dp" />
        <stroke android:color="#FFFFFF" android:width="1dp" />
    </shape>
</inset>

/res/drawable/dialog_body.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <gradient android:startColor="#FFFFFFFF" android:endColor="#FFFFFFFF"
        android:angle="270" />
</shape>

/res/drawable/dialog_footer.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle" >

    <solid android:color="#FFFFFF" />

    <corners
        android:bottomLeftRadius="5dp"
        android:bottomRightRadius="5dp" />

    <stroke
        android:width="1dp"
        android:color="#FFFFFF" />

</shape>

res/layout/dialog_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="45dp"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <Button
        android:id="@+id/button1"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="90dp"
        android:layout_toLeftOf="@+id/textView1"
        android:background="@drawable/button_selector"
        android:text="Ok"
        android:textColor="@android:color/white"
        android:textStyle="bold" />

    <Button
        android:id="@+id/button2"
        style="?android:attr/buttonStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignTop="@+id/button1"
        android:layout_marginRight="48dp"
        android:background="@drawable/button_selector"
        android:text="More"
        android:textColor="@android:color/white"
        android:textStyle="bold" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/button1"
        android:layout_marginTop="41dp"
        android:orientation="vertical" >
    </LinearLayout>

</RelativeLayout>

My code for AlertDialog:

public static void createYesNoDialog(final Context context, String positivebuttonname,
            String negativebuttonname, String message, int messagedrawable, String headermessage,
            final DialogResponse dr) {
        final DialogResponse dialogResponse = dr;
        ContextThemeWrapper ctw = new ContextThemeWrapper(context,
                com.gp4ever.worldlogo.quiz.R.style.MyTheme);

        AlertDialog.Builder builder = new AlertDialog.Builder(ctw);
        LayoutInflater inflater = (LayoutInflater)context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View layout = inflater.inflate(com.gp4ever.worldlogo.quiz.R.layout.dialog_layout, null);
        TextView text = (TextView)layout.findViewById(com.gp4ever.worldlogo.quiz.R.id.textView1);
        Button buttonOk = (Button)layout.findViewById(com.gp4ever.worldlogo.quiz.R.id.button1);
        Button buttonMore = (Button)layout.findViewById(com.gp4ever.worldlogo.quiz.R.id.button2);
        text.setText(message);
        if (messagedrawable > 0) {
            text.setCompoundDrawablesWithIntrinsicBounds(messagedrawable, 0, 0, 0);
        } else if (messagedrawable == 0)
            text.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
        builder.setView(layout);
        builder.setCancelable(false);
        builder.setTitle(headermessage);
        builder.setIcon(android.R.drawable.ic_dialog_alert);
        final AlertDialog dialog = builder.create();

        buttonOk.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                dialog.cancel();
            }
        });
        buttonMore.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                dialog.cancel();
            }
        });

}

My current output:

I do not get any rounded corners. I can see that it is different from the usual style. Even though I change radius on my drawable, the corners does not reflect to those changes.

回答1:

You can do it using the following code:

CustomDialog.java:

public class MainActivity extends Activity{

    private static final int ALERT_DIALOG = 1;

    @Override
    public void onCreate( Bundle savedInstanceState )
    {
        super.onCreate( savedInstanceState );
        setContentView( R.layout.main );

        ( (Button) findViewById( R.id.button1 ) )
            .setOnClickListener( new OnClickListener()
                {
                    public void onClick( View v )
                    {
                        showDialog( ALERT_DIALOG );
                    }
                }
            );
    }

    @Override
    protected Dialog onCreateDialog( int id ){
        Dialog dialog = null;
        if ( id == ALERT_DIALOG )
        {
            ContextThemeWrapper ctw = new ContextThemeWrapper( this, R.style.MyTheme );
            AlertDialog.Builder builder = new AlertDialog.Builder( ctw );
            builder.setMessage( "Hello World" )
                .setTitle( "Alert Dialog" )
                .setIcon( android.R.drawable.ic_dialog_alert )
                .setCancelable( false )
                .setPositiveButton( "Close", new DialogInterface.OnClickListener()
                    {
                        public void onClick( DialogInterface dialog, int which )
                           {
                                dialog.dismiss();
                           }
                        } 
                    );
            dialog = builder.create();
        }
        if ( dialog == null )
        {
            dialog = super.onCreateDialog( id );
        }
        return dialog;
     }
 }

dialog_title.xml

<?xml version="1.0" encoding="utf-8"?>
<inset xmlns:android="http://schemas.android.com/apk/res/android" android:insetBottom="-1dp">
    <shape android:shape="rectangle">
        <solid android:color="#000000" />
        <corners android:topLeftRadius="20dp" android:topRightRadius="20dp" />
        <stroke android:color="#7F7F7F" android:width="1dp" />
    </shape>
</inset>

dialog_footer.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <solid android:color="#7F7F7F" />
    <corners android:bottomLeftRadius="20dp" android:bottomRightRadius="20dp" />
    <stroke android:color="#7F7F7F" android:width="1dp" />
</shape>

Just change the radius amount in:

dialog_title.xml

and

dialog_footer.xml

and that'll generate the following output:

hope this will help you.

---

UPDATE:
I'm not an expert but this is what I found. It may be right or wrong. After many attempts I ended up with the following:

1- ContextThemeWrapper is not applicable for API 14, it works fine on Gingerbread and older versions but with API > 10 it doesn't work.

2- to overcome the above issue and make it work on API > 10 as requested, I replace this line:

ContextThemeWrapper ctw = new ContextThemeWrapper( this, R.style.MyTheme );
AlertDialog.Builder builder= new AlertDialog.Builder( ctw );

with this:

AlertDialog.Builder builder= new AlertDialog.Builder( this,R.style.MyTheme );

but you need to change:

android:minSdkVersion="8"  

to

android:minSdkVersion="11" 

the result will be as shown in the following image on ICS (API 14):

This image is from a Samsung Galaxy S3 running ICS.

Note: modified project initiated with API 14 SO manifest sdk will be:

<uses-sdk
  android:minSdkVersion="11"
  android:targetSdkVersion="15" />

---

FINAL WORD: As my little knowledge in Android development (I'm not an expert),

1- custom alert dialog runs smoothly in API < 10 but not > 10 with the same Java code,

if we want it to run in ICS with the same effect as appeared in API < 10, we need to modify the code, so it will run on ICS but will not run in any version down API 11.

2- even the result in ICS is not satisfactory, the round corner applies only to the title but not the footer.

---

SECOND UPDATE: FINALLY I get all corners round,

JUST apply padding to dialog_footer.xml as follows:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
    <solid android:color="#7F7F7F" />
    <corners android:bottomLeftRadius="20dp" android:bottomRightRadius="20dp" />
    <stroke android:color="#7F7F7F" android:width="1dp" />
    <padding android:left="10dp" android:top="10dp" android:right="10dp"
android:bottom="10dp" /> 
</shape>

Output image:

This image is from a Samsung Galaxy S3 running ICS.

回答2:

Just one more step from @iDroid Explorer answer

add this line when you build the dialog

dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));

and this will get the rectangle disappear (which actually is transparent) and get a perfect rounded dialog box.

回答3:

I have try the same problem with below one and it works for me. Even for ICS also.

1. First i have put the theme to my AlertDialog.

final Dialog  nag = new Dialog(this,android.R.style.Theme_Translucent_NoTitleBar_Fullscreen);
        nag.requestWindowFeature(Window.FEATURE_NO_TITLE);
        nag.setCancelable(true);
        nag.setContentView(R.layout.pop_exit);  
        Button btnNO = (Button)nag.findViewById(R.id.btn_popup_NO);
        Button btnYES = (Button)nag.findViewById(R.id.btn_popup_YES);


        btnNO.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

            nag.cancel();


            }
        });

        btnYES.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                System.exit(0);

            }
        });

        nag.show();

2. Then have implemented the Custom Layout for the Dialog view

pop_exit.xml

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:gravity="center" android:layout_height="fill_parent">

    <!-- <LinearLayout android:orientation="vertical" android:layout_marginLeft="20dp" 
        android:layout_marginRight="20dp" android:background="#95000056" android:layout_width="fill_parent" 
        android:layout_height="wrap_content"> -->

    <LinearLayout android:orientation="vertical"
        android:layout_marginLeft="20dp" android:layout_marginRight="20dp"
        android:background="@drawable/round" android:layout_width="fill_parent"
        android:layout_height="wrap_content">



        <TextView android:text="Exit Application"
            android:layout_width="wrap_content" android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal" android:textStyle="bold"
            android:textColor="#fff" android:textSize="20dp"
            android:layout_marginTop="5dp" />


        <LinearLayout android:layout_width="fill_parent"
            android:layout_height="wrap_content" android:orientation="horizontal"
            android:layout_marginTop="5dp" android:weightSum="2"
            android:layout_marginLeft="10dp" android:layout_marginRight="10dp"
            android:gravity="center">

            <Button android:text="No" android:layout_weight="1"
                android:gravity="center" android:layout_width="wrap_content"
                android:layout_height="wrap_content" android:id="@+id/btn_popup_NO" />

            <Button android:text="Ok" android:layout_weight="1"
                android:layout_width="wrap_content" android:layout_height="wrap_content"
                android:id="@+id/btn_popup_YES" />
        </LinearLayout>


    </LinearLayout>

</LinearLayout>

3. Now add shape to the Background of parent layout of pop_exit.xml

round.xml // shape file

    <?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="#99000056" />
    <corners android:radius="35px" />
    <padding android:left="0dp" android:top="0dp" android:right="0dp"
        android:bottom="0dp" />
</shape>

I just do it. It will works for you also for ICS.

Hope it will help you. If not then let me know.

Enjoy Coding...

:)

回答4:

As you state you dont want to use a 9 patch image, take a look here.

https://stackoverflow.com/a/1683195/940834

The principle is exactly the same, except you assign the background to your layout where this example is to a linear layout.

回答5:

1. create xml in drawable folder with dialog_corner.

   <?xml version="1.0" encoding="utf-8"?>
    <shape xmlns:android="http://schemas.android.com/apk/res/android">
     <solid android:color="@color/main_background"/>
   <corners
       android:topLeftRadius="@dimen/margin_10" android:topRightRadius="@dimen/margin_10"
       android:bottomRightRadius="@dimen/margin_10" android:bottomLeftRadius="@dimen/margin_10" />
   </shape>
   

   2.put in layout

   android:background="@drawable/dialog_corner"

   3.in you java file keep below code

View mView=LayoutInflater.from(mContext).inflate(R.layout.layout_pob,null); alertDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));