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。
您可以通过修改活动的主题属性....来覆盖由活动生成的DialogFragments所使用的默认主题
在AndroidManifest.xml中设置活动的主题。
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.helloworld">
<application
android:name=".App"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme"> <!-- set all Activity themes to your custom theme -->
.....
</application>
</manifest>
在values/styles.xml中，重写用于确定派生的DialogFragments使用什么主题的项
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="AppTheme" parent="Theme.AppCompat">
<!-- override the default theme for DialogFragments -->
<item name="android:dialogTheme">@style/AppTheme.Dialog</item>
</style>
.....
</resources>
在values/styles.xml中，定义并配置你想要用于DialogFragments的主题
<?xml version="1.0" encoding="utf-8"?>
<resources>
.....
<!--
configure your custom theme for DialogFragments...
-->
<style name="AppTheme.Dialog" parent="Theme.AppCompat.Dialog.MinWidth">
<!-- override the default theme for DialogFragments spawned by this DialogFragment -->
<item name="android:dialogTheme">@style/AppTheme.Dialog</item>
<!--
OPTIONAL: override the background for the dialog...i am using a dark theme,
and for some reason, there is no themes for dialogs with dark backgrounds,
so, i made my own.
-->
<item name="android:windowBackground">@drawable/dialog__window_background</item>
<!--
add the title to the dialog's theme. you can remove it later by using
DialogFragment.setStyle()
-->
<item name="android:windowNoTitle">false</item>
<item name="windowNoTitle">?android:windowNoTitle</item>
</style>
.....
</resources>
可选:如果你使用一个黑暗的主题，并覆盖android:windowBackground，就像我在AppTheme。对话框，然后添加一个可绘制的/dialog__window_background.xml文件，内容如下:
<?xml version="1.0" encoding="utf-8"?>
<inset xmlns:android="http://schemas.android.com/apk/res/android"
android:insetLeft="16dp"
android:insetTop="16dp"
android:insetRight="16dp"
android:insetBottom="16dp">
<shape android:shape="rectangle">
<corners android:radius="?dialogCornerRadius" />
<solid android:color="?android:colorBackground" />
</shape>
</inset>
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>
