如何更改AlertDialog的主题

Question

我想知道是否有人可以帮助我.我正在尝试创建自定义AlertDialog.为此,我在styles.xml中添加了以下代码行

<resources>
 <style name="CustomAlertDialog" parent="android:Theme.Dialog.Alert">
  <item name="android:windowBackground">@drawable/color_panel_background</item>
 </style>
</resources>

• color_panel_background.9.png位于drawable文件夹中.这也可以在Android SDK res文件夹中找到.

以下是主要活动.

package com.customdialog;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;

public class CustomDialog extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        this.setTheme(R.style.CustomAlertDialog);
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("HELLO!");
        builder .setCancelable(false)
          .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int id) {
               //MyActivity.this.finish();
           }
       })
       .setNegativeButton("No", new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int id) {
               //dialog.cancel();
           }
       });

        AlertDialog alertdialog = builder.create();
        alertdialog.show();
    }
}

为了将主题应用于AlertDialog,我必须将主题设置为当前上下文.

但是,我似乎无法让应用程序显示自定义的AlertDialog.任何人都可以帮我解决这个问题吗？

Answer 1

在Dialog.java(Android src)中使用ContextThemeWrapper.所以你可以复制这个想法并做类似的事情:

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

然后按照你想要的样式:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="AlertDialogCustom" parent="@android:style/Theme.Dialog">
        <item name="android:textColor">#00FF00</item>
        <item name="android:typeface">monospace</item>
        <item name="android:textSize">10sp</item>
    </style>
</resources>

Answer 2

我正在AlertDialog使用sdk 1.6来解决这个与主题相关的问题,如下所述:http://markmail.org/message/mj5ut56irkrkc4nr

我通过以下方式解决了这个问题:

  new AlertDialog.Builder(
  new ContextThemeWrapper(context, android.R.style.Theme_Dialog))

希望这可以帮助.

Answer 3

我在博客中写了一篇关于如何使用XML样式文件配置AlertDialog布局的文章.主要问题是您需要为不同的布局参数设置不同的样式.这是一个基于AlertDialog样式的Holo Light Platform版本19的样板文件的样板文件,应该涵盖一系列标准布局方面,如文本大小和背景颜色.

<style name="AppBaseTheme" parent="android:Theme.Holo.Light">
    ...
    <item name="android:alertDialogTheme">@style/MyAlertDialogTheme</item>
    <item name="android:alertDialogStyle">@style/MyAlertDialogStyle</item>
    ...
</style>

<style name="MyBorderlessButton">
    <!-- Set background drawable and text size of the buttons here -->
    <item name="android:background">...</item>
    <item name="android:textSize">...</item>
</style>

<style name="MyButtonBar">
    <!-- Define a background for the button bar and a divider between the buttons here -->
    <item name="android:divider">....</item>
    <item name="android:dividerPadding">...</item>
    <item name="android:showDividers">...</item>
    <item name="android:background">...</item>
</style>

<style name="MyAlertDialogTitle">
    <item name="android:maxLines">1</item>
    <item name="android:scrollHorizontally">true</item>
</style>

<style name="MyAlertTextAppearance">
    <!-- Set text size and color of title and message here -->
    <item name="android:textSize"> ... </item>
    <item name="android:textColor">...</item>
</style>

<style name="MyAlertDialogTheme">
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowTitleStyle">@style/MyAlertDialogTitle</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowMinWidthMajor">@android:dimen/dialog_min_width_major</item>
    <item name="android:windowMinWidthMinor">@android:dimen/dialog_min_width_minor</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:textAppearanceMedium">@style/MyAlertTextAppearance</item>
    <!-- If you don't want your own button bar style use
            @android:style/Holo.Light.ButtonBar.AlertDialog
            and
            ?android:attr/borderlessButtonStyle
         instead of @style/MyButtonBar and @style/MyBorderlessButton -->
    <item name="android:buttonBarStyle">@style/MyButtonBar</item>
    <item name="android:buttonBarButtonStyle">@style/MyBorderlessButton</item>
</style>

<style name="MyAlertDialogStyle">
    <!-- Define background colors of title, message, buttons, etc. here -->
    <item name="android:fullDark">...</item>
    <item name="android:topDark">...</item>
    <item name="android:centerDark">...</item>
    <item name="android:bottomDark">...</item>
    <item name="android:fullBright">...</item>
    <item name="android:topBright">...</item>
    <item name="android:centerBright">...</item>
    <item name="android:bottomBright">...</item>
    <item name="android:bottomMedium">...</item>
    <item name="android:centerMedium">...</item>
</style>

Answer 4

 <style name="AlertDialogCustom" parent="Theme.AppCompat.Light.Dialog.Alert">
    <!-- Used for the buttons -->
    <item name="colorAccent">@color/colorAccent</item>
    <!-- Used for the title and text -->
    <item name="android:textColorPrimary">#FFFFFF</item>
    <!-- Used for the background -->
    <item name="android:background">@color/teal</item>
</style>





new AlertDialog.Builder(new ContextThemeWrapper(context,R.style.AlertDialogCustom))
            .setMessage(Html.fromHtml(Msg))
            .setPositiveButton(posBtn, okListener)
            .setNegativeButton(negBtn, null)
            .create()
            .show();

Answer 5

我正在努力解决这个问题 - 您可以android:alertDialogStyle="@style/AlertDialog"在主题中使用对话框的背景设置样式,但它会忽略您拥有的任何文本设置.正如@rflexor上面所述,在Honeycomb之前无法使用SDK(你可以使用Reflection).

简而言之,我的解决方案是使用上面的方式设置对话框的背景,然后设置自定义标题和内容视图(使用与SDK中的布局相同的布局).

我的包装:

import com.mypackage.R;

import android.app.AlertDialog;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

public class CustomAlertDialogBuilder extends AlertDialog.Builder {

    private final Context mContext;
    private TextView mTitle;
    private ImageView mIcon;
    private TextView mMessage;

    public CustomAlertDialogBuilder(Context context) {
        super(context);
        mContext = context; 

        View customTitle = View.inflate(mContext, R.layout.alert_dialog_title, null);
        mTitle = (TextView) customTitle.findViewById(R.id.alertTitle);
        mIcon = (ImageView) customTitle.findViewById(R.id.icon);
        setCustomTitle(customTitle);

        View customMessage = View.inflate(mContext, R.layout.alert_dialog_message, null);
        mMessage = (TextView) customMessage.findViewById(R.id.message);
        setView(customMessage);
    }

    @Override
    public CustomAlertDialogBuilder setTitle(int textResId) {
        mTitle.setText(textResId);
        return this;
    }
    @Override
    public CustomAlertDialogBuilder setTitle(CharSequence text) {
        mTitle.setText(text);
        return this;
    }

    @Override
    public CustomAlertDialogBuilder setMessage(int textResId) {
        mMessage.setText(textResId);
        return this;
    }

    @Override
    public CustomAlertDialogBuilder setMessage(CharSequence text) {
        mMessage.setText(text);
        return this;
    }

    @Override
    public CustomAlertDialogBuilder setIcon(int drawableResId) {
        mIcon.setImageResource(drawableResId);
        return this;
    }

    @Override
    public CustomAlertDialogBuilder setIcon(Drawable icon) {
        mIcon.setImageDrawable(icon);
        return this;
    }

}

alert_dialog_title.xml(取自SDK)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    >
    <LinearLayout
            android:id="@+id/title_template"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:gravity="center_vertical"
            android:layout_marginTop="6dip"
            android:layout_marginBottom="9dip"
            android:layout_marginLeft="10dip"
            android:layout_marginRight="10dip">

            <ImageView android:id="@+id/icon"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="top"
                android:paddingTop="6dip"
                android:paddingRight="10dip"
                android:src="@drawable/ic_dialog_alert" />
            <TextView android:id="@+id/alertTitle"
                style="@style/?android:attr/textAppearanceLarge"
                android:singleLine="true"
                android:ellipsize="end"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content" />
        </LinearLayout>
        <ImageView android:id="@+id/titleDivider"
            android:layout_width="fill_parent"
            android:layout_height="1dip"
            android:scaleType="fitXY"
            android:gravity="fill_horizontal"
            android:src="@drawable/divider_horizontal_bright" />
</LinearLayout>

alert_dialog_message.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/scrollView"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:paddingTop="2dip"
            android:paddingBottom="12dip"
            android:paddingLeft="14dip"
            android:paddingRight="10dip">
    <TextView android:id="@+id/message"
                style="?android:attr/textAppearanceMedium"
                android:textColor="@color/dark_grey"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:padding="5dip" />
</ScrollView>

然后使用CustomAlertDialogBuilder而不是AlertDialog.Builder创建对话框,setTitle并setMessage像往常一样调用.

Answer 6

您可以在启动Builder时直接指定主题:

AlertDialog.Builder builder = new AlertDialog.Builder(
                    getActivity(), R.style.MyAlertDialogTheme);

然后在您的主题中自定义主题 values/styles.xml

<!-- Alert Dialog -->
<style name="MyAlertDialogTheme" parent="Theme.AppCompat.Dialog.Alert">
    <item name="colorAccent">@color/colorAccent</item>
    <item name="android:colorBackground">@color/alertDialogBackground</item>
    <item name="android:windowBackground">@color/alertDialogBackground</item>
</style>

Answer 7

对于自定义对话框：

只是调用super(context,R.style.<dialog style>)而不是super(context)在对话框构造函数中

public class MyDialog extends Dialog
{
    public MyDialog(Context context)
    {
       super(context, R.style.Theme_AppCompat_Light_Dialog_Alert)
    }
}

对于AlertDialog：

只需使用以下构造函数创建alertDialog即可：

 new AlertDialog.Builder(
 new ContextThemeWrapper(context, android.R.style.Theme_Dialog))

Answer 8

我想这不可能.至少不与Builder一起使用.我正在使用1.6,Builder.create()中的实现是:

public AlertDialog create() {
    final AlertDialog dialog = new AlertDialog(P.mContext);
    P.apply(dialog.mAlert);
    [...]
}

它调用AlertDialog的"not-theme-aware"构造函数,如下所示:

protected AlertDialog(Context context) {
    this(context, com.android.internal.R.style.Theme_Dialog_Alert);
}

AlertDialog中有第二个用于更改主题的构造函数:

protected AlertDialog(Context context, int theme) {
    super(context, theme);
    [...]
}

Builder只是不打电话.

如果Dialog非常通用,我会尝试编写AlertDialog的子类,调用第二个构造函数并使用该类而不是Builder-mechanism.

Answer 9

更好的方法是使用自定义对话框并根据您的需要进行自定义，这里是自定义对话框示例......

public class CustomDialogUI {
Dialog dialog;
Vibrator vib;
RelativeLayout rl;

@SuppressWarnings("static-access")
public void dialog(final Context context, String title, String message,
        final Runnable task) {
    dialog = new Dialog(context);
    dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    dialog.setContentView(R.layout.custom);
    dialog.setCancelable(false);
    TextView m = (TextView) dialog.findViewById(R.id.message);
    TextView t = (TextView) dialog.findViewById(R.id.title);
    final Button n = (Button) dialog.findViewById(R.id.button2);
    final Button p = (Button) dialog.findViewById(R.id.next_button);
    rl = (RelativeLayout) dialog.findViewById(R.id.rlmain);
    t.setText(bold(title));
    m.setText(message);
    dialog.show();
    n.setText(bold("Close"));
    p.setText(bold("Ok"));
    // color(context,rl);
    vib = (Vibrator) context.getSystemService(context.VIBRATOR_SERVICE);
    n.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View arg0) {
            vib.vibrate(15);
            dialog.dismiss();
        }
    });
    p.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View arg0) {
            vib.vibrate(20);
            dialog.dismiss();
            task.run();
        }
    });
}
 //customize text style bold italic....
public SpannableString bold(String s) {
    SpannableString spanString = new SpannableString(s);
    spanString.setSpan(new StyleSpan(Typeface.BOLD), 0,
            spanString.length(), 0);
    spanString.setSpan(new UnderlineSpan(), 0, spanString.length(), 0);
    // spanString.setSpan(new StyleSpan(Typeface.ITALIC), 0,
    // spanString.length(), 0);
    return spanString;
}

}

这是xml布局

<?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"
android:background="#00000000"
>

<RelativeLayout
    android:id="@+id/rlmain"
    android:layout_width="fill_parent"
    android:layout_height="150dip"
    android:layout_alignParentLeft="true"
    android:layout_centerVertical="true"
    android:background="#569CE3" >

    <RelativeLayout
        android:id="@+id/relativeLayout1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginLeft="25dip"
        android:layout_marginTop="10dip" >

        <TextView
            android:id="@+id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentTop="true"
            android:text="Are you Sure?"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textColor="#ffffff"
            android:textSize="13dip" />
    </RelativeLayout>

    <RelativeLayout
        android:id="@+id/relativeLayout2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/relativeLayout1"
        android:layout_alignRight="@+id/relativeLayout1"
        android:layout_below="@+id/relativeLayout1"
        android:layout_marginTop="5dip" >
    </RelativeLayout>

    <ProgressBar
        android:id="@+id/process"
        style="?android:attr/progressBarStyleSmall"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_marginRight="3dip"
        android:layout_marginTop="3dip" />

    <RelativeLayout
        android:id="@+id/relativeLayout3"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/relativeLayout2"
        android:layout_below="@+id/relativeLayout2"
        android:layout_toLeftOf="@+id/process" >

        <TextView
            android:id="@+id/message"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_centerVertical="true"
            android:text="Medium Text"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:textColor="#ffffff"
            android:textSize="13dip"/>

    </RelativeLayout>

    <Button
        android:id="@+id/next_button"
        android:layout_width="90dip"
        android:layout_height="35dip"
        android:layout_alignParentBottom="true"
        android:textColor="@drawable/button_text_color"
         android:background="@drawable/blue_button"
         android:layout_marginBottom="5dp"
           android:textSize="10dp"

        android:layout_alignRight="@+id/relativeLayout3"
        android:text="Okay" />

    <Button
        android:id="@+id/button2"
        android:text="Cancel"
        android:textColor="@drawable/button_text_color"
        android:layout_width="90dip"
        android:layout_height="35dip"
        android:layout_marginBottom="5dp"
         android:background="@drawable/blue_button"
         android:layout_marginRight="7dp"
        android:textSize="10dp"
        android:layout_alignParentBottom="true"
        android:layout_toLeftOf="@+id/next_button"
         />

</RelativeLayout>