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Android 提供了 AlertDialog 類(lèi)可通過(guò)其內(nèi)部類(lèi) Builder 輕松創(chuàng)建對(duì)話(huà)框窗口,但是沒(méi)法對(duì)這個(gè)對(duì)話(huà)框窗口進(jìn)行定制,為了修改 AlertDialog 窗口顯示的外觀,解決的辦法就是創(chuàng)建一個(gè)指定的 AlertDialog 和 AlertDialog.Builder 類(lèi)。

Android default Dialog

定義外觀

我們希望將上面默認(rèn)的對(duì)話(huà)框外觀修改為如下圖所示的新對(duì)話(huà)框風(fēng)格:

Custom Android Dialog

該對(duì)話(huà)框?qū)⒅С窒旅嫣匦裕?/p>

  1. 可從資源或者字符串直接指定對(duì)話(huà)框標(biāo)題
  2. 可從資源、字符串和自定義布局來(lái)設(shè)置對(duì)話(huà)框內(nèi)容
  3. 可設(shè)置按鈕和相應(yīng)的事件處理

 編寫(xiě)布局、樣式和主題

該對(duì)話(huà)框使用一個(gè)定制的布局來(lái)輸出內(nèi)容,布局定義的id將用于訪(fǎng)問(wèn)標(biāo)題 TextView,下面是定義文件:

01<?xml version="1.0" encoding="utf-8"?>
02 
03<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
04    android:orientation="vertical"
05    android:layout_width="fill_parent"
06    android:minWidth="280dip"
07    android:layout_height="wrap_content">
08 
09  
10    <LinearLayout
11        android:orientation="vertical"
12        android:background="@drawable/header"
13        android:layout_width="fill_parent"
14        android:layout_height="wrap_content">
15  
16        <TextView
17            style="@style/DialogText.Title"
18 
19            android:id="@+id/title"
20            android:paddingRight="8dip"
21            android:paddingLeft="8dip"
22            android:background="@drawable/title"
23            android:layout_width="wrap_content"
24 
25            android:layout_height="wrap_content"/>
26  
27    </LinearLayout>
28  
29    <LinearLayout
30        android:id="@+id/content"
31        android:orientation="vertical"
32        android:background="@drawable/center"
33 
34        android:layout_width="fill_parent"
35        android:layout_height="wrap_content">
36  
37        <TextView
38            style="@style/DialogText"
39            android:id="@+id/message"
40            android:padding="5dip"
41 
42            android:layout_width="fill_parent"
43            android:layout_height="wrap_content"/>
44  
45    </LinearLayout>
46  
47    <LinearLayout
48        android:orientation="horizontal"
49        android:background="@drawable/footer"
50 
51        android:layout_width="fill_parent"
52        android:layout_height="wrap_content">
53  
54        <Button
55            android:id="@+id/positiveButton"
56            android:layout_marginTop="3dip"
57            android:layout_width="0dip"
58 
59            android:layout_weight="1"
60            android:layout_height="wrap_content"
61            android:singleLine="true"/>
62  
63        <Button
64            android:id="@+id/negativeButton"
65 
66            android:layout_marginTop="3dip"
67            android:layout_width="0dip"
68            android:layout_weight="1"
69            android:layout_height="wrap_content"
70            android:singleLine="true"/>
71 
72  
73    </LinearLayout>
74  
75</LinearLayout>

根節(jié)點(diǎn) LinearLayout 的寬度設(shè)置為 fill_parent 而最小的寬度是 280dip ,因此對(duì)話(huà)框的寬度將始終為屏幕寬度的 87.5%

自定義的主題用于聲明對(duì)話(huà)框是浮動(dòng)的,而且使用自定義的背景和標(biāo)題視圖:

01<?xml version="1.0" encoding="utf-8"?>
02<resources>
03  
04    <style name="Dialog" parent="android:style/Theme.Dialog">
05        <item name="android:windowBackground">@null</item>
06 
07        <item name="android:windowNoTitle">true</item>
08        <item name="android:windowIsFloating">true</item>
09    </style>
10  
11</resources>

接下來(lái)我們需要定義對(duì)話(huà)框的標(biāo)題和消息的顯示:

01<?xml version="1.0" encoding="utf-8"?>
02<resources>
03  
04    <style name="DialogText">
05        <item name="android:textColor">#FF000000</item>
06 
07        <item name="android:textSize">12sp</item>
08    </style>
09  
10    <style name="DialogText.Title">
11        <item name="android:textSize">16sp</item>
12 
13        <item name="android:textStyle">bold</item>
14    </style>
15  
16</resources>

編寫(xiě)對(duì)話(huà)框和 Builder 類(lèi)

最好我們要提供跟 AletDialog.Builder 類(lèi)一樣的方法:

001package net.androgames.blog.sample.customdialog.dialog;
002  
003import net.androgames.blog.sample.customdialog.R;
004import android.app.Dialog;
005import android.content.Context;
006import android.content.DialogInterface;
007import android.view.LayoutInflater;
008import android.view.View;
009import android.view.ViewGroup.LayoutParams;
010import android.widget.Button;
011import android.widget.LinearLayout;
012import android.widget.TextView;
013  
014/**
015 *
016 * Create custom Dialog windows for your application
017 * Custom dialogs rely on custom layouts wich allow you to
018 * create and use your own look & feel.
019 *
020 * Under GPL v3 : http://www.gnu.org/licenses/gpl-3.0.html
021 *
022 * @author antoine vianey
023 *
024 */
025public class CustomDialog extends Dialog {
026  
027    public CustomDialog(Context context, int theme) {
028        super(context, theme);
029    }
030  
031    public CustomDialog(Context context) {
032        super(context);
033    }
034  
035    /**
036     * Helper class for creating a custom dialog
037     */
038    public static class Builder {
039  
040        private Context context;
041        private String title;
042        private String message;
043        private String positiveButtonText;
044        private String negativeButtonText;
045        private View contentView;
046  
047        private DialogInterface.OnClickListener
048                        positiveButtonClickListener,
049                        negativeButtonClickListener;
050  
051        public Builder(Context context) {
052            this.context = context;
053        }
054  
055        /**
056         * Set the Dialog message from String
057         * @param title
058         * @return
059         */
060        public Builder setMessage(String message) {
061            this.message = message;
062            return this;
063        }
064  
065        /**
066         * Set the Dialog message from resource
067         * @param title
068         * @return
069         */
070        public Builder setMessage(int message) {
071            this.message = (String) context.getText(message);
072            return this;
073        }
074  
075        /**
076         * Set the Dialog title from resource
077         * @param title
078         * @return
079         */
080        public Builder setTitle(int title) {
081            this.title = (String) context.getText(title);
082            return this;
083        }
084  
085        /**
086         * Set the Dialog title from String
087         * @param title
088         * @return
089         */
090        public Builder setTitle(String title) {
091            this.title = title;
092            return this;
093        }
094  
095        /**
096         * Set a custom content view for the Dialog.
097         * If a message is set, the contentView is not
098         * added to the Dialog...
099         * @param v
100         * @return
101         */
102        public Builder setContentView(View v) {
103            this.contentView = v;
104            return this;
105        }
106  
107        /**
108         * Set the positive button resource and it's listener
109         * @param positiveButtonText
110         * @param listener
111         * @return
112         */
113        public Builder setPositiveButton(int positiveButtonText,
114                DialogInterface.OnClickListener listener) {
115            this.positiveButtonText = (String) context
116                    .getText(positiveButtonText);
117            this.positiveButtonClickListener = listener;
118            return this;
119        }
120  
121        /**
122         * Set the positive button text and it's listener
123         * @param positiveButtonText
124         * @param listener
125         * @return
126         */
127        public Builder setPositiveButton(String positiveButtonText,
128                DialogInterface.OnClickListener listener) {
129            this.positiveButtonText = positiveButtonText;
130            this.positiveButtonClickListener = listener;
131            return this;
132        }
133  
134        /**
135         * Set the negative button resource and it's listener
136         * @param negativeButtonText
137         * @param listener
138         * @return
139         */
140        public Builder setNegativeButton(int negativeButtonText,
141                DialogInterface.OnClickListener listener) {
142            this.negativeButtonText = (String) context
143                    .getText(negativeButtonText);
144            this.negativeButtonClickListener = listener;
145            return this;
146        }
147  
148        /**
149         * Set the negative button text and it's listener
150         * @param negativeButtonText
151         * @param listener
152         * @return
153         */
154        public Builder setNegativeButton(String negativeButtonText,
155                DialogInterface.OnClickListener listener) {
156            this.negativeButtonText = negativeButtonText;
157            this.negativeButtonClickListener = listener;
158            return this;
159        }
160  
161        /**
162         * Create the custom dialog
163         */
164        public CustomDialog create() {
165            LayoutInflater inflater = (LayoutInflater) context
166                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
167            // instantiate the dialog with the custom Theme
168            final CustomDialog dialog = new CustomDialog(context,
169                    R.style.Dialog);
170            View layout = inflater.inflate(R.layout.dialog, null);
171            dialog.addContentView(layout, new LayoutParams(
172                    LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
173            // set the dialog title
174            ((TextView) layout.findViewById(R.id.title)).setText(title);
175            // set the confirm button
176            if (positiveButtonText != null) {
177                ((Button) layout.findViewById(R.id.positiveButton))
178                        .setText(positiveButtonText);
179                if (positiveButtonClickListener != null) {
180                    ((Button) layout.findViewById(R.id.positiveButton))
181                            .setOnClickListener(new View.OnClickListener() {
182                                public void onClick(View v) {
183                                    positiveButtonClickListener.onClick(
184                                            dialog,
185                                            DialogInterface.BUTTON_POSITIVE);
186                                }
187                            });
188                }
189            } else {
190                // if no confirm button just set the visibility to GONE
191                layout.findViewById(R.id.positiveButton).setVisibility(
192                        View.GONE);
193            }
194            // set the cancel button
195            if (negativeButtonText != null) {
196                ((Button) layout.findViewById(R.id.negativeButton))
197                        .setText(negativeButtonText);
198                if (negativeButtonClickListener != null) {
199                    ((Button) layout.findViewById(R.id.negativeButton))
200                            .setOnClickListener(new View.OnClickListener() {
201                                public void onClick(View v) {
202                                    positiveButtonClickListener.onClick(
203                                            dialog,
204                                            DialogInterface.BUTTON_NEGATIVE);
205                                }
206                            });
207                }
208            } else {
209                // if no confirm button just set the visibility to GONE
210                layout.findViewById(R.id.negativeButton).setVisibility(
211                        View.GONE);
212            }
213            // set the content message
214            if (message != null) {
215                ((TextView) layout.findViewById(
216                        R.id.message)).setText(message);
217            } else if (contentView != null) {
218                // if no message set
219                // add the contentView to the dialog body
220                ((LinearLayout) layout.findViewById(R.id.content))
221                        .removeAllViews();
222                ((LinearLayout) layout.findViewById(R.id.content))
223                        .addView(contentView,
224                                new LayoutParams(
225                                        LayoutParams.WRAP_CONTENT,
226                                        LayoutParams.WRAP_CONTENT));
227            }
228            dialog.setContentView(layout);
229            return dialog;
230        }
231  
232    }
233  
234}

使用自定義的 Builder

使用方法很簡(jiǎn)單:

01/**
02 * Build the desired Dialog
03 * CUSTOM or DEFAULT
04 */
05@Override
06public Dialog onCreateDialog(int dialogId) {
07    Dialog dialog = null;
08    switch (dialogId) {
09        case CUSTOM_DIALOG :
10            CustomDialog.Builder customBuilder = new
11                CustomDialog.Builder(CustomDialogActivity.this);
12            customBuilder.setTitle("Custom title")
13                .setMessage("Custom body")
14                .setNegativeButton("Cancel",
15                        new DialogInterface.OnClickListener() {
16                    public void onClick(DialogInterface dialog, int which) {
17                        CustomDialogActivity.this
18                        .dismissDialog(CUSTOM_DIALOG);
19                    }
20                })
21                .setPositiveButton("Confirm",
22                        new DialogInterface.OnClickListener() {
23                    public void onClick(DialogInterface dialog, int which) {
24                        dialog.dismiss();
25                    }
26                });
27            dialog = customBuilder.create();
28            break;
29        case DEFAULT_DIALOG :
30            AlertDialog.Builder alertBuilder = new
31                AlertDialog.Builder(CustomDialogActivity.this);
32            alertBuilder.setTitle("Default title")
33                .setMessage("Default body")
34                .setNegativeButton("Cancel",
35                        new DialogInterface.OnClickListener() {
36                    public void onClick(DialogInterface dialog, int which) {
37                        dialog.dismiss();
38                    }
39                })
40                .setPositiveButton("Confirm",
41                        new DialogInterface.OnClickListener() {
42                    public void onClick(DialogInterface dialog, int which) {
43                        CustomDialogActivity.this
44                        .dismissDialog(DEFAULT_DIALOG);
45                    }
46                });
47            dialog = alertBuilder.create();
48            break;
49    }
50    return dialog;
51}
http://code.google.com/p/androgames-sample/
http://www.open-open.com/lib/view/open1325635738437.html
posted on 2012-03-24 02:27 小果子 閱讀(7459) 評(píng)論(0)  編輯 收藏 引用 所屬分類(lèi): Android & Ios
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