我在想有没有人能帮我一下。我试图创建一个自定义AlertDialog。为了做到这一点，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位于可绘制文件夹。这也可以在Android SDK res文件夹。
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();
}
}
为了将主题应用到AlertDialog，我必须将主题设置为当前上下文。
然而，我似乎不能让应用程序显示自定义的AlertDialog。有人能帮我一下吗?
我在博客上写过一篇关于如何用XML样式文件配置AlertDialog布局的文章。主要的问题是不同的布局参数需要不同的样式定义。下面是一个基于Holo Light平台19版AlertDialog样式的样板文件，该样式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>
更好的方法是使用自定义对话框，并根据您的需要定制自定义对话框示例.....
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>
我想这是不可能的。至少不是和建造者。我正在使用1.6和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“非主题感知”构造函数，看起来像这样:
protected AlertDialog(Context context) {
this(context, com.android.internal.R.style.Theme_Dialog_Alert);
}
在AlertDialog中有第二个构造函数用于更改主题:
protected AlertDialog(Context context, int theme) {
super(context, theme);
[...]
}
建造者就是不叫。
如果Dialog非常通用，我会试着编写AlertDialog的子类，调用第二个构造函数并使用该类而不是生成器机制。
任何试图在Fragment(使用支持库，即pre API 11)中做到这一点的人都应该这样做:
public class LoadingDialogFragment extends DialogFragment {
public static final String ID = "loadingDialog";
public static LoadingDialogFragment newInstance() {
LoadingDialogFragment f = new LoadingDialogFragment();
return f;
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
StyleAlertDialog adb = new StyleAlertDialog(getActivity(), R.style.Your_Style);
adb.setView(getActivity().getLayoutInflater().inflate(R.layout.fragment_dialog_layout, null));
return adb;
}
private class StyleAlertDialog extends AlertDialog {
protected StyleAlertDialog(Context context, int theme) {
super(context, theme);
}
}
}
@Rflexor鼓励我扩展AlertDialog并公开构造函数
