在最近的项目中需要用到一个类似于toast效果的警告框，而且还要是圆角的。下面是我实现的效果截图：
首先定义一个dialog：
1. package com.bobge.doura.customview;
2.
3. import android.app.Dialog;
4. import android.content.Context;
5. import android.view.LayoutInflater;
6. import android.view.View;
7. import android.widget.LinearLayout;
8. import android.widget.TextView;
9. import com.bobge.doura.R;
10.
11. /**
12. * Created by Administrator on 2015/6/23.
13. */
14. public class CustomDialog extends Dialog {
15. public CustomDialog(Context context, int theme) {
16. super(context, theme);
17. }
18.
19. public CustomDialog(Context context) {
20. super(context);
21. }
22.
23. /**
24. * Helper class for creating a custom dialog
25. */
26. public static class Builder {
27.
28. private Context context;
29. private String message;
30. private View contentView;
31.
32. public Builder(Context context) {
33. this.context = context;
34. }
35.
36. /**
37. * Set the Dialog message from String
38. *
39. * @return
40. */
41. public Builder setMessage(String message) {
42. this.message = message;
43. return this;
44. }
45.
46. /**
47. * Set the Dialog message from resource
48. *
49. * @return
50. */
51. public Builder setMessage(int message) {
52. this.message = (String) context.getText(message);
53. return this;
54. }
55.
56.
57. /**
58. * Set a custom content view for the Dialog.
59. * If a message is set, the contentView is not
60. * added to the Dialog...
61. *
62. * @param v
63. * @return
64. */
65. public Builder setContentView(View v) {
66. this.contentView = v;
67. return this;
68. }
69.
70. /**
71. * Create the custom dialog
72. */
73. public CustomDialog create() {
74. LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
75. // instantiate the dialog with the custom Theme
76. final CustomDialog dialog = new CustomDialog(context, R.style.dialog);
77. null);
78. new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
79. // set the content message
80. if (message != null) {
81. ((TextView) layout.findViewById(R.id.tv_warmdialog)).setText(message);
82. }
83. dialog.setContentView(layout);
84. return dialog;
85. }
86. }
87. }
写了一个工具类来显示该dialog：
1. package com.bobge.doura.helpr;
2.
3. import android.content.Context;
4. import android.os.Handler;
5. import com.bobge.doura.customview.CustomDialog;
6.
7. /**
8. * Created by Administrator on 2015/6/18.
9. */
10. public class ToastShow {
11.
12. public static void showCustomDialog(String warmInfo, Context context) {
13. new
14. CustomDialog.Builder(context);
15. customBuilder.setMessage(warmInfo);
16. final CustomDialog customDialog = customBuilder.create();
17. customDialog.show();
18. new Handler();
19. new Runnable() {
20. public void run() {
21. customDialog.dismiss();
22. }
23. 1000);
24. }
25.
26. }
最重要的一点是要给dialog设置一个style：
1. <style name="dialog" parent="@android:style/Theme.Dialog">
2. <item name="android:windowFrame">@null</item>
3. <item name="android:windowIsFloating">true</item>
4. <item name="android:windowIsTranslucent">true</item>
5. <item name="android:windowNoTitle">true</item>
6. <item name="android:background">@drawable/shape_dialog</item>
7. <item name="android:windowBackground">@drawable/shape_dialog</item>
8. <item name="android:backgroundDimEnabled">true</item>
9. <item name="android:backgroundDimAmount">0</item>
10.
11. </style>
1. <item name="android:backgroundDimAmount">0</item>
这一句是设置背景的灰度，这里设置的是0，表示背景灰度完全透明！如此可以实现上面说的效果。
