对话框对于应用也是必不可少的一个组件，在Android中也不例外，对话框对于一些提示重要信息，或者一些需要用户额外交互的一些内容很有帮助。
自定义Dialog步骤：
1、主要创建Java类,并继承Dialog
2、创建布局文件来加载和一些样式文件
效果图：
DialogBox.java
1 public class DialogBox extends Dialog { 2 3 public DialogBox(Context context) { 4 super(context); 5 } 6 7 public DialogBox(Context context, int theme) { 8 super(context, theme); 9 } 10 11 public static class Builder { 12 private Context context; 13 private String title; 14 private String message; 15 private String positiveButtonText; 16 private String negativeButtonText; 17 private View contentView; 18 private DialogInterface.OnClickListener positiveButtonClickListener; 19 private DialogInterface.OnClickListener negativeButtonClickListener; 20 21 public Builder(Context context) { 22 this.context = context; 23 } 24 25 public Builder setMessage(String message) { 26 this.message = message; 27 return this; 28 } 29 30 /** 31 * Set the Dialog message from resource 32 *
33 * @param title 34 * @return 35 */ 36 public Builder setMessage(int message) { 37 this.message = (String) context.getText(message); 38 return this; 39 } 40 41 /** 42 * Set the Dialog title from resource 43 *
44 * @param title 45 * @return 46 */ 47 public Builder setTitle(int title) { 48 this.title = (String) context.getText(title); 49 return this; 50 } 51 52 /** 53 * Set the Dialog title from String 54 *
55 * @param title 56 * @return 57 */ 58 59 public Builder setTitle(String title) { 60 this.title = title; 61 return this; 62 } 63 64 public Builder setContentView(View v) { 65 this.contentView = v; 66 return this; 67 } 68 69 /** 70 * Set the positive button resource and it's listener 71 *
72 * @param positiveButtonText 73 * @return 74 */ 75 public Builder setPositiveButton(int positiveButtonText, 76 DialogInterface.OnClickListener listener) { 77 this.positiveButtonText = (String) context 78 .getText(positiveButtonText); 79 this.positiveButtonClickListener = listener; 80 return this; 81 } 82 83 public Builder setPositiveButton(String positiveButtonText, 84 DialogInterface.OnClickListener listener) { 85 this.positiveButtonText = positiveButtonText; 86 this.positiveButtonClickListener = listener; 87 return this; 88 } 89 90 public Builder setNegativeButton(int negativeButtonText, 91 DialogInterface.OnClickListener listener) { 92 this.negativeButtonText = (String) context 93 .getText(negativeButtonText); 94 this.negativeButtonClickListener = listener; 95 return this; 96 } 97 98 public Builder setNegativeButton(String negativeButtonText, 99 DialogInterface.OnClickListener listener) {100 this.negativeButtonText = negativeButtonText;101 this.negativeButtonClickListener = listener;102 return this;103 }104 105 public DialogBox create() {106 LayoutInflater inflater = (LayoutInflater) context107 .getSystemService(Context.LAYOUT_INFLATER_SERVICE);108 final DialogBox dialog = new DialogBox(context, R.style.Dialog);109 View layout = inflater.inflate(R.layout.dialog_normal_layout, null);110 dialog.addContentView(layout, new LayoutParams(111 LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));112 ((TextView) layout.findViewById(R.id.title)).setText(title);113 if (positiveButtonText != null) {114 ((Button) layout.findViewById(R.id.positiveButton))115 .setText(positiveButtonText);116 if (positiveButtonClickListener != null) {117 ((Button) layout.findViewById(R.id.positiveButton))118 .setOnClickListener(new View.OnClickListener() {119 public void onClick(View v) {120 positiveButtonClickListener.onClick(dialog,121 DialogInterface.BUTTON_POSITIVE);122 }123 });124 }125 } else {126 layout.findViewById(R.id.positiveButton).setVisibility(127 View.GONE);128 }129 if (negativeButtonText != null) {130 ((Button) layout.findViewById(R.id.negativeButton))131 .setText(negativeButtonText);132 if (negativeButtonClickListener != null) {133 ((Button) layout.findViewById(R.id.negativeButton))134 .setOnClickListener(new View.OnClickListener() {135 public void onClick(View v) {136 negativeButtonClickListener.onClick(dialog,137 DialogInterface.BUTTON_NEGATIVE);138 }139 });140 }141 } else {142 layout.findViewById(R.id.negativeButton).setVisibility(143 View.GONE);144 }145 if (message != null) {146 ((TextView) layout.findViewById(R.id.message)).setText(message);147 } else if (contentView != null) {148 ((LinearLayout) layout.findViewById(R.id.content))149 .removeAllViews();150 ((LinearLayout) layout.findViewById(R.id.content)).addView(151 contentView, new LayoutParams(LayoutParams.FILL_PARENT,152 LayoutParams.FILL_PARENT));153 }154 dialog.setContentView(layout);155 return dialog;156 }157 158 }159 }自定义View的布局文件：
<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:clickable="true" android:orientation="vertical" android:padding="20.0dip" > <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_gravity="center" android:background="#FA90BC" android:orientation="vertical" > <TextView android:id="@+id/title" android:layout_width="fill_parent" android:layout_height="40.0dip" android:gravity="center" android:text="提示" android:visibility="visible" /> <LinearLayout android:id="@+id/content" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="#ffffff" android:gravity="center" > <TextView android:id="@+id/message" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="left|center" android:lineSpacingMultiplier="1.5" android:minHeight="65.0dip" android:paddingBottom="15.0dip" android:paddingLeft="20.0dip" android:paddingRight="20.0dip" android:paddingTop="15.0dip" /> </LinearLayout> <View android:layout_width="fill_parent" android:layout_height="1.0px" android:background="#ffd0d0d0" /> <LinearLayout android:layout_width="fill_parent" android:layout_height="60.0dip" android:layout_gravity="bottom" android:background="@drawable/dialog_bottom_bg" android:gravity="center" android:orientation="horizontal" > <Button android:id="@+id/positiveButton" android:layout_width="114.0dip" android:layout_height="40.0dip" android:background="#FA90BC" android:gravity="center" android:text="确定" /> <Button android:id="@+id/negativeButton" android:layout_width="114.0dip" android:layout_height="40.0dip" android:layout_marginLeft="20.0dip" android:background="#ffffff" android:gravity="center" android:text="取消" /> </LinearLayout> </LinearLayout></FrameLayout>
MainActivity.Java
public class MainActivity extends Activity {
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
} public void showAlertDialog(View view) {
DialogBox.Builder builder = new DialogBox.Builder(this);
builder.setMessage("删除该商品？");
builder.setTitle("温馨提示");
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) {
dialog.dismiss(); // 你的操作事项 }
});
builder.setNegativeButton("取消", new android.content.DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.create().show();
}
}