原文網址：http://blog.csdn.net/lmj623565791/article/details/38965311

轉載請標明出處：http://blog.csdn.net/lmj623565791/article/details/38965311，本文出自【張鴻洋的博客】

打開大家手上的項目，基本都會有一大批的輔助類，今天特此整理出10個基本每個項目中都會使用的工具類，用于快速開發~~

在此感謝群里給我發項目中工具類的兄弟/姐妹~

1、日志工具類L.java

?

[java]?view plaincopy

1. package?com.zhy.utils;??
2. ??
3. import?android.util.Log;??
4. ??
5. /**?
6. ?*?Log統一管理類?
7. ?*??
8. ?*??
9. ?*??
10. ?*/??
11. public?class?L??
12. {??
13. ??
14. ????private?L()??
15. ????{??
16. ????????/*?cannot?be?instantiated?*/??
17. ????????throw?new?UnsupportedOperationException("cannot?be?instantiated");??
18. ????}??
19. ??
20. ????public?static?boolean?isDebug?=?true;//?是否需要打印bug，可以在application的onCreate函數里面初始化??
21. ????private?static?final?String?TAG?=?"way";??
22. ??
23. ????//?下面四個是默認tag的函數??
24. ????public?static?void?i(String?msg)??
25. ????{??
26. ????????if?(isDebug)??
27. ????????????Log.i(TAG,?msg);??
28. ????}??
29. ??
30. ????public?static?void?d(String?msg)??
31. ????{??
32. ????????if?(isDebug)??
33. ????????????Log.d(TAG,?msg);??
34. ????}??
35. ??
36. ????public?static?void?e(String?msg)??
37. ????{??
38. ????????if?(isDebug)??
39. ????????????Log.e(TAG,?msg);??
40. ????}??
41. ??
42. ????public?static?void?v(String?msg)??
43. ????{??
44. ????????if?(isDebug)??
45. ????????????Log.v(TAG,?msg);??
46. ????}??
47. ??
48. ????//?下面是傳入自定義tag的函數??
49. ????public?static?void?i(String?tag,?String?msg)??
50. ????{??
51. ????????if?(isDebug)??
52. ????????????Log.i(tag,?msg);??
53. ????}??
54. ??
55. ????public?static?void?d(String?tag,?String?msg)??
56. ????{??
57. ????????if?(isDebug)??
58. ????????????Log.i(tag,?msg);??
59. ????}??
60. ??
61. ????public?static?void?e(String?tag,?String?msg)??
62. ????{??
63. ????????if?(isDebug)??
64. ????????????Log.i(tag,?msg);??
65. ????}??
66. ??
67. ????public?static?void?v(String?tag,?String?msg)??
68. ????{??
69. ????????if?(isDebug)??
70. ????????????Log.i(tag,?msg);??
71. ????}??
72. }??

?

網上看到的類，注釋上應該原創作者的名字，很簡單的一個類；網上也有很多提供把日志記錄到SDCard上的，不過我是從來沒記錄過，所以引入個最簡單的，大家可以進行評價是否需要擴充~~

2、Toast統一管理類?

?

[java]?view plaincopy

1. package?com.zhy.utils;??
2. ??
3. import?android.content.Context;??
4. import?android.widget.Toast;??
5. ??
6. /**?
7. ?*?Toast統一管理類?
8. ?*??
9. ?*/??
10. public?class?T??
11. {??
12. ??
13. ????private?T()??
14. ????{??
15. ????????/*?cannot?be?instantiated?*/??
16. ????????throw?new?UnsupportedOperationException("cannot?be?instantiated");??
17. ????}??
18. ??
19. ????public?static?boolean?isShow?=?true;??
20. ??
21. ????/**?
22. ?????*?短時間顯示Toast?
23. ?????*??
24. ?????*?@param?context?
25. ?????*?@param?message?
26. ?????*/??
27. ????public?static?void?showShort(Context?context,?CharSequence?message)??
28. ????{??
29. ????????if?(isShow)??
30. ????????????Toast.makeText(context,?message,?Toast.LENGTH_SHORT).show();??
31. ????}??
32. ??
33. ????/**?
34. ?????*?短時間顯示Toast?
35. ?????*??
36. ?????*?@param?context?
37. ?????*?@param?message?
38. ?????*/??
39. ????public?static?void?showShort(Context?context,?int?message)??
40. ????{??
41. ????????if?(isShow)??
42. ????????????Toast.makeText(context,?message,?Toast.LENGTH_SHORT).show();??
43. ????}??
44. ??
45. ????/**?
46. ?????*?長時間顯示Toast?
47. ?????*??
48. ?????*?@param?context?
49. ?????*?@param?message?
50. ?????*/??
51. ????public?static?void?showLong(Context?context,?CharSequence?message)??
52. ????{??
53. ????????if?(isShow)??
54. ????????????Toast.makeText(context,?message,?Toast.LENGTH_LONG).show();??
55. ????}??
56. ??
57. ????/**?
58. ?????*?長時間顯示Toast?
59. ?????*??
60. ?????*?@param?context?
61. ?????*?@param?message?
62. ?????*/??
63. ????public?static?void?showLong(Context?context,?int?message)??
64. ????{??
65. ????????if?(isShow)??
66. ????????????Toast.makeText(context,?message,?Toast.LENGTH_LONG).show();??
67. ????}??
68. ??
69. ????/**?
70. ?????*?自定義顯示Toast時間?
71. ?????*??
72. ?????*?@param?context?
73. ?????*?@param?message?
74. ?????*?@param?duration?
75. ?????*/??
76. ????public?static?void?show(Context?context,?CharSequence?message,?int?duration)??
77. ????{??
78. ????????if?(isShow)??
79. ????????????Toast.makeText(context,?message,?duration).show();??
80. ????}??
81. ??
82. ????/**?
83. ?????*?自定義顯示Toast時間?
84. ?????*??
85. ?????*?@param?context?
86. ?????*?@param?message?
87. ?????*?@param?duration?
88. ?????*/??
89. ????public?static?void?show(Context?context,?int?message,?int?duration)??
90. ????{??
91. ????????if?(isShow)??
92. ????????????Toast.makeText(context,?message,?duration).show();??
93. ????}??
94. ??
95. }??

?

也是非常簡單的一個封裝，能省則省了~~

3、SharedPreferences封裝類SPUtils

?

[java]?view plaincopy

1. package?com.zhy.utils;??
2. ??
3. import?java.lang.reflect.InvocationTargetException;??
4. import?java.lang.reflect.Method;??
5. import?java.util.Map;??
6. ??
7. import?android.content.Context;??
8. import?android.content.SharedPreferences;??
9. ??
10. public?class?SPUtils??
11. {??
12. ????/**?
13. ?????*?保存在手機里面的文件名?
14. ?????*/??
15. ????public?static?final?String?FILE_NAME?=?"share_data";??
16. ??
17. ????/**?
18. ?????*?保存數據的方法，我們需要拿到保存數據的具體類型，然后根據類型調用不同的保存方法?
19. ?????*??
20. ?????*?@param?context?
21. ?????*?@param?key?
22. ?????*?@param?object?
23. ?????*/??
24. ????public?static?void?put(Context?context,?String?key,?Object?object)??
25. ????{??
26. ??
27. ????????SharedPreferences?sp?=?context.getSharedPreferences(FILE_NAME,??
28. ????????????????Context.MODE_PRIVATE);??
29. ????????SharedPreferences.Editor?editor?=?sp.edit();??
30. ??
31. ????????if?(object?instanceof?String)??
32. ????????{??
33. ????????????editor.putString(key,?(String)?object);??
34. ????????}?else?if?(object?instanceof?Integer)??
35. ????????{??
36. ????????????editor.putInt(key,?(Integer)?object);??
37. ????????}?else?if?(object?instanceof?Boolean)??
38. ????????{??
39. ????????????editor.putBoolean(key,?(Boolean)?object);??
40. ????????}?else?if?(object?instanceof?Float)??
41. ????????{??
42. ????????????editor.putFloat(key,?(Float)?object);??
43. ????????}?else?if?(object?instanceof?Long)??
44. ????????{??
45. ????????????editor.putLong(key,?(Long)?object);??
46. ????????}?else??
47. ????????{??
48. ????????????editor.putString(key,?object.toString());??
49. ????????}??
50. ??
51. ????????SharedPreferencesCompat.apply(editor);??
52. ????}??
53. ??
54. ????/**?
55. ?????*?得到保存數據的方法，我們根據默認值得到保存的數據的具體類型，然后調用相對于的方法獲取值?
56. ?????*??
57. ?????*?@param?context?
58. ?????*?@param?key?
59. ?????*?@param?defaultObject?
60. ?????*?@return?
61. ?????*/??
62. ????public?static?Object?get(Context?context,?String?key,?Object?defaultObject)??
63. ????{??
64. ????????SharedPreferences?sp?=?context.getSharedPreferences(FILE_NAME,??
65. ????????????????Context.MODE_PRIVATE);??
66. ??
67. ????????if?(defaultObject?instanceof?String)??
68. ????????{??
69. ????????????return?sp.getString(key,?(String)?defaultObject);??
70. ????????}?else?if?(defaultObject?instanceof?Integer)??
71. ????????{??
72. ????????????return?sp.getInt(key,?(Integer)?defaultObject);??
73. ????????}?else?if?(defaultObject?instanceof?Boolean)??
74. ????????{??
75. ????????????return?sp.getBoolean(key,?(Boolean)?defaultObject);??
76. ????????}?else?if?(defaultObject?instanceof?Float)??
77. ????????{??
78. ????????????return?sp.getFloat(key,?(Float)?defaultObject);??
79. ????????}?else?if?(defaultObject?instanceof?Long)??
80. ????????{??
81. ????????????return?sp.getLong(key,?(Long)?defaultObject);??
82. ????????}??
83. ??
84. ????????return?null;??
85. ????}??
86. ??
87. ????/**?
88. ?????*?移除某個key值已經對應的值?
89. ?????*?@param?context?
90. ?????*?@param?key?
91. ?????*/??
92. ????public?static?void?remove(Context?context,?String?key)??
93. ????{??
94. ????????SharedPreferences?sp?=?context.getSharedPreferences(FILE_NAME,??
95. ????????????????Context.MODE_PRIVATE);??
96. ????????SharedPreferences.Editor?editor?=?sp.edit();??
97. ????????editor.remove(key);??
98. ????????SharedPreferencesCompat.apply(editor);??
99. ????}??
100. ??
101. ????/**?
102. ?????*?清除所有數據?
103. ?????*?@param?context?
104. ?????*/??
105. ????public?static?void?clear(Context?context)??
106. ????{??
107. ????????SharedPreferences?sp?=?context.getSharedPreferences(FILE_NAME,??
108. ????????????????Context.MODE_PRIVATE);??
109. ????????SharedPreferences.Editor?editor?=?sp.edit();??
110. ????????editor.clear();??
111. ????????SharedPreferencesCompat.apply(editor);??
112. ????}??
113. ??
114. ????/**?
115. ?????*?查詢某個key是否已經存在?
116. ?????*?@param?context?
117. ?????*?@param?key?
118. ?????*?@return?
119. ?????*/??
120. ????public?static?boolean?contains(Context?context,?String?key)??
121. ????{??
122. ????????SharedPreferences?sp?=?context.getSharedPreferences(FILE_NAME,??
123. ????????????????Context.MODE_PRIVATE);??
124. ????????return?sp.contains(key);??
125. ????}??
126. ??
127. ????/**?
128. ?????*?返回所有的鍵值對?
129. ?????*??
130. ?????*?@param?context?
131. ?????*?@return?
132. ?????*/??
133. ????public?static?Map<String,??>?getAll(Context?context)??
134. ????{??
135. ????????SharedPreferences?sp?=?context.getSharedPreferences(FILE_NAME,??
136. ????????????????Context.MODE_PRIVATE);??
137. ????????return?sp.getAll();??
138. ????}??
139. ??
140. ????/**?
141. ?????*?創建一個解決SharedPreferencesCompat.apply方法的一個兼容類?
142. ?????*??
143. ?????*?@author?zhy?
144. ?????*??
145. ?????*/??
146. ????private?static?class?SharedPreferencesCompat??
147. ????{??
148. ????????private?static?final?Method?sApplyMethod?=?findApplyMethod();??
149. ??
150. ????????/**?
151. ?????????*?反射查找apply的方法?
152. ?????????*??
153. ?????????*?@return?
154. ?????????*/??
155. ????????@SuppressWarnings({?"unchecked",?"rawtypes"?})??
156. ????????private?static?Method?findApplyMethod()??
157. ????????{??
158. ????????????try??
159. ????????????{??
160. ????????????????Class?clz?=?SharedPreferences.Editor.class;??
161. ????????????????return?clz.getMethod("apply");??
162. ????????????}?catch?(NoSuchMethodException?e)??
163. ????????????{??
164. ????????????}??
165. ??
166. ????????????return?null;??
167. ????????}??
168. ??
169. ????????/**?
170. ?????????*?如果找到則使用apply執行，否則使用commit?
171. ?????????*??
172. ?????????*?@param?editor?
173. ?????????*/??
174. ????????public?static?void?apply(SharedPreferences.Editor?editor)??
175. ????????{??
176. ????????????try??
177. ????????????{??
178. ????????????????if?(sApplyMethod?!=?null)??
179. ????????????????{??
180. ????????????????????sApplyMethod.invoke(editor);??
181. ????????????????????return;??
182. ????????????????}??
183. ????????????}?catch?(IllegalArgumentException?e)??
184. ????????????{??
185. ????????????}?catch?(IllegalAccessException?e)??
186. ????????????{??
187. ????????????}?catch?(InvocationTargetException?e)??
188. ????????????{??
189. ????????????}??
190. ????????????editor.commit();??
191. ????????}??
192. ????}??
193. ??
194. }??

對SharedPreference的使用做了建議的封裝，對外公布出put，get，remove，clear等等方法；

?

注意一點，里面所有的commit操作使用了SharedPreferencesCompat.apply進行了替代，目的是盡可能的使用apply代替commit

首先說下為什么，因為commit方法是同步的，并且我們很多時候的commit操作都是UI線程中，畢竟是IO操作，盡可能異步；

所以我們使用apply進行替代，apply異步的進行寫入；

但是apply相當于commit來說是new API呢，為了更好的兼容，我們做了適配；

SharedPreferencesCompat也可以給大家創建兼容類提供了一定的參考~~

?

4、單位轉換類?DensityUtils

?

[java]?view plaincopy

1. package?com.zhy.utils;??
2. ??
3. import?android.content.Context;??
4. import?android.util.TypedValue;??
5. ??
6. /**?
7. ?*?常用單位轉換的輔助類?
8. ?*??
9. ?*??
10. ?*??
11. ?*/??
12. public?class?DensityUtils??
13. {??
14. ????private?DensityUtils()??
15. ????{??
16. ????????/*?cannot?be?instantiated?*/??
17. ????????throw?new?UnsupportedOperationException("cannot?be?instantiated");??
18. ????}??
19. ??
20. ????/**?
21. ?????*?dp轉px?
22. ?????*??
23. ?????*?@param?context?
24. ?????*?@param?val?
25. ?????*?@return?
26. ?????*/??
27. ????public?static?int?dp2px(Context?context,?float?dpVal)??
28. ????{??
29. ????????return?(int)?TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,??
30. ????????????????dpVal,?context.getResources().getDisplayMetrics());??
31. ????}??
32. ??
33. ????/**?
34. ?????*?sp轉px?
35. ?????*??
36. ?????*?@param?context?
37. ?????*?@param?val?
38. ?????*?@return?
39. ?????*/??
40. ????public?static?int?sp2px(Context?context,?float?spVal)??
41. ????{??
42. ????????return?(int)?TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,??
43. ????????????????spVal,?context.getResources().getDisplayMetrics());??
44. ????}??
45. ??
46. ????/**?
47. ?????*?px轉dp?
48. ?????*??
49. ?????*?@param?context?
50. ?????*?@param?pxVal?
51. ?????*?@return?
52. ?????*/??
53. ????public?static?float?px2dp(Context?context,?float?pxVal)??
54. ????{??
55. ????????final?float?scale?=?context.getResources().getDisplayMetrics().density;??
56. ????????return?(pxVal?/?scale);??
57. ????}??
58. ??
59. ????/**?
60. ?????*?px轉sp?
61. ?????*??
62. ?????*?@param?fontScale?
63. ?????*?@param?pxVal?
64. ?????*?@return?
65. ?????*/??
66. ????public?static?float?px2sp(Context?context,?float?pxVal)??
67. ????{??
68. ????????return?(pxVal?/?context.getResources().getDisplayMetrics().scaledDensity);??
69. ????}??
70. ??
71. }??

?

5、SD卡相關輔助類?SDCardUtils

[java]?view plaincopy

1. package?com.zhy.utils;??
2. ??
3. import?java.io.File;??
4. ??
5. import?android.os.Environment;??
6. import?android.os.StatFs;??
7. ??
8. /**?
9. ?*?SD卡相關的輔助類?
10. ?*??
11. ?*??
12. ?*??
13. ?*/??
14. public?class?SDCardUtils??
15. {??
16. ????private?SDCardUtils()??
17. ????{??
18. ????????/*?cannot?be?instantiated?*/??
19. ????????throw?new?UnsupportedOperationException("cannot?be?instantiated");??
20. ????}??
21. ??
22. ????/**?
23. ?????*?判斷SDCard是否可用?
24. ?????*??
25. ?????*?@return?
26. ?????*/??
27. ????public?static?boolean?isSDCardEnable()??
28. ????{??
29. ????????return?Environment.getExternalStorageState().equals(??
30. ????????????????Environment.MEDIA_MOUNTED);??
31. ??
32. ????}??
33. ??
34. ????/**?
35. ?????*?獲取SD卡路徑?
36. ?????*??
37. ?????*?@return?
38. ?????*/??
39. ????public?static?String?getSDCardPath()??
40. ????{??
41. ????????return?Environment.getExternalStorageDirectory().getAbsolutePath()??
42. ????????????????+?File.separator;??
43. ????}??
44. ??
45. ????/**?
46. ?????*?獲取SD卡的剩余容量?單位byte?
47. ?????*??
48. ?????*?@return?
49. ?????*/??
50. ????public?static?long?getSDCardAllSize()??
51. ????{??
52. ????????if?(isSDCardEnable())??
53. ????????{??
54. ????????????StatFs?stat?=?new?StatFs(getSDCardPath());??
55. ????????????//?獲取空閑的數據塊的數量??
56. ????????????long?availableBlocks?=?(long)?stat.getAvailableBlocks()?-?4;??
57. ????????????//?獲取單個數據塊的大小（byte）??
58. ????????????long?freeBlocks?=?stat.getAvailableBlocks();??
59. ????????????return?freeBlocks?*?availableBlocks;??
60. ????????}??
61. ????????return?0;??
62. ????}??
63. ??
64. ????/**?
65. ?????*?獲取指定路徑所在空間的剩余可用容量字節數，單位byte?
66. ?????*??
67. ?????*?@param?filePath?
68. ?????*?@return?容量字節?SDCard可用空間，內部存儲可用空間?
69. ?????*/??
70. ????public?static?long?getFreeBytes(String?filePath)??
71. ????{??
72. ????????//?如果是sd卡的下的路徑，則獲取sd卡可用容量??
73. ????????if?(filePath.startsWith(getSDCardPath()))??
74. ????????{??
75. ????????????filePath?=?getSDCardPath();??
76. ????????}?else??
77. ????????{//?如果是內部存儲的路徑，則獲取內存存儲的可用容量??
78. ????????????filePath?=?Environment.getDataDirectory().getAbsolutePath();??
79. ????????}??
80. ????????StatFs?stat?=?new?StatFs(filePath);??
81. ????????long?availableBlocks?=?(long)?stat.getAvailableBlocks()?-?4;??
82. ????????return?stat.getBlockSize()?*?availableBlocks;??
83. ????}??
84. ??
85. ????/**?
86. ?????*?獲取系統存儲路徑?
87. ?????*??
88. ?????*?@return?
89. ?????*/??
90. ????public?static?String?getRootDirectoryPath()??
91. ????{??
92. ????????return?Environment.getRootDirectory().getAbsolutePath();??
93. ????}??
94. ??
95. ??
96. }??

?

?

6、屏幕相關輔助類?ScreenUtils

?

[java]?view plaincopy

1. package?com.zhy.utils;??
2. ??
3. import?android.app.Activity;??
4. import?android.content.Context;??
5. import?android.graphics.Bitmap;??
6. import?android.graphics.Rect;??
7. import?android.util.DisplayMetrics;??
8. import?android.view.View;??
9. import?android.view.WindowManager;??
10. ??
11. /**?
12. ?*?獲得屏幕相關的輔助類?
13. ?*??
14. ?*??
15. ?*??
16. ?*/??
17. public?class?ScreenUtils??
18. {??
19. ????private?ScreenUtils()??
20. ????{??
21. ????????/*?cannot?be?instantiated?*/??
22. ????????throw?new?UnsupportedOperationException("cannot?be?instantiated");??
23. ????}??
24. ??
25. ????/**?
26. ?????*?獲得屏幕高度?
27. ?????*??
28. ?????*?@param?context?
29. ?????*?@return?
30. ?????*/??
31. ????public?static?int?getScreenWidth(Context?context)??
32. ????{??
33. ????????WindowManager?wm?=?(WindowManager)?context??
34. ????????????????.getSystemService(Context.WINDOW_SERVICE);??
35. ????????DisplayMetrics?outMetrics?=?new?DisplayMetrics();??
36. ????????wm.getDefaultDisplay().getMetrics(outMetrics);??
37. ????????return?outMetrics.widthPixels;??
38. ????}??
39. ??
40. ????/**?
41. ?????*?獲得屏幕寬度?
42. ?????*??
43. ?????*?@param?context?
44. ?????*?@return?
45. ?????*/??
46. ????public?static?int?getScreenHeight(Context?context)??
47. ????{??
48. ????????WindowManager?wm?=?(WindowManager)?context??
49. ????????????????.getSystemService(Context.WINDOW_SERVICE);??
50. ????????DisplayMetrics?outMetrics?=?new?DisplayMetrics();??
51. ????????wm.getDefaultDisplay().getMetrics(outMetrics);??
52. ????????return?outMetrics.heightPixels;??
53. ????}??
54. ??
55. ????/**?
56. ?????*?獲得狀態欄的高度?
57. ?????*??
58. ?????*?@param?context?
59. ?????*?@return?
60. ?????*/??
61. ????public?static?int?getStatusHeight(Context?context)??
62. ????{??
63. ??
64. ????????int?statusHeight?=?-1;??
65. ????????try??
66. ????????{??
67. ????????????Class<?>?clazz?=?Class.forName("com.android.internal.R$dimen");??
68. ????????????Object?object?=?clazz.newInstance();??
69. ????????????int?height?=?Integer.parseInt(clazz.getField("status_bar_height")??
70. ????????????????????.get(object).toString());??
71. ????????????statusHeight?=?context.getResources().getDimensionPixelSize(height);??
72. ????????}?catch?(Exception?e)??
73. ????????{??
74. ????????????e.printStackTrace();??
75. ????????}??
76. ????????return?statusHeight;??
77. ????}??
78. ??
79. ????/**?
80. ?????*?獲取當前屏幕截圖，包含狀態欄?
81. ?????*??
82. ?????*?@param?activity?
83. ?????*?@return?
84. ?????*/??
85. ????public?static?Bitmap?snapShotWithStatusBar(Activity?activity)??
86. ????{??
87. ????????View?view?=?activity.getWindow().getDecorView();??
88. ????????view.setDrawingCacheEnabled(true);??
89. ????????view.buildDrawingCache();??
90. ????????Bitmap?bmp?=?view.getDrawingCache();??
91. ????????int?width?=?getScreenWidth(activity);??
92. ????????int?height?=?getScreenHeight(activity);??
93. ????????Bitmap?bp?=?null;??
94. ????????bp?=?Bitmap.createBitmap(bmp,?0,?0,?width,?height);??
95. ????????view.destroyDrawingCache();??
96. ????????return?bp;??
97. ??
98. ????}??
99. ??
100. ????/**?
101. ?????*?獲取當前屏幕截圖，不包含狀態欄?
102. ?????*??
103. ?????*?@param?activity?
104. ?????*?@return?
105. ?????*/??
106. ????public?static?Bitmap?snapShotWithoutStatusBar(Activity?activity)??
107. ????{??
108. ????????View?view?=?activity.getWindow().getDecorView();??
109. ????????view.setDrawingCacheEnabled(true);??
110. ????????view.buildDrawingCache();??
111. ????????Bitmap?bmp?=?view.getDrawingCache();??
112. ????????Rect?frame?=?new?Rect();??
113. ????????activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);??
114. ????????int?statusBarHeight?=?frame.top;??
115. ??
116. ????????int?width?=?getScreenWidth(activity);??
117. ????????int?height?=?getScreenHeight(activity);??
118. ????????Bitmap?bp?=?null;??
119. ????????bp?=?Bitmap.createBitmap(bmp,?0,?statusBarHeight,?width,?height??
120. ????????????????-?statusBarHeight);??
121. ????????view.destroyDrawingCache();??
122. ????????return?bp;??
123. ??
124. ????}??
125. ??
126. }??

?

7、App相關輔助類

?

?

[java]?view plaincopy

1. package?com.zhy.utils;??
2. ??
3. import?android.content.Context;??
4. import?android.content.pm.PackageInfo;??
5. import?android.content.pm.PackageManager;??
6. import?android.content.pm.PackageManager.NameNotFoundException;??
7. ??
8. /**?
9. ?*?跟App相關的輔助類?
10. ?*??
11. ?*??
12. ?*??
13. ?*/??
14. public?class?AppUtils??
15. {??
16. ??
17. ????private?AppUtils()??
18. ????{??
19. ????????/*?cannot?be?instantiated?*/??
20. ????????throw?new?UnsupportedOperationException("cannot?be?instantiated");??
21. ??
22. ????}??
23. ??
24. ????/**?
25. ?????*?獲取應用程序名稱?
26. ?????*/??
27. ????public?static?String?getAppName(Context?context)??
28. ????{??
29. ????????try??
30. ????????{??
31. ????????????PackageManager?packageManager?=?context.getPackageManager();??
32. ????????????PackageInfo?packageInfo?=?packageManager.getPackageInfo(??
33. ????????????????????context.getPackageName(),?0);??
34. ????????????int?labelRes?=?packageInfo.applicationInfo.labelRes;??
35. ????????????return?context.getResources().getString(labelRes);??
36. ????????}?catch?(NameNotFoundException?e)??
37. ????????{??
38. ????????????e.printStackTrace();??
39. ????????}??
40. ????????return?null;??
41. ????}??
42. ??
43. ????/**?
44. ?????*?[獲取應用程序版本名稱信息]?
45. ?????*??
46. ?????*?@param?context?
47. ?????*?@return?當前應用的版本名稱?
48. ?????*/??
49. ????public?static?String?getVersionName(Context?context)??
50. ????{??
51. ????????try??
52. ????????{??
53. ????????????PackageManager?packageManager?=?context.getPackageManager();??
54. ????????????PackageInfo?packageInfo?=?packageManager.getPackageInfo(??
55. ????????????????????context.getPackageName(),?0);??
56. ????????????return?packageInfo.versionName;??
57. ??
58. ????????}?catch?(NameNotFoundException?e)??
59. ????????{??
60. ????????????e.printStackTrace();??
61. ????????}??
62. ????????return?null;??
63. ????}??
64. ??
65. }??

?

8、軟鍵盤相關輔助類KeyBoardUtils

?

?

[java]?view plaincopy

1. package?com.zhy.utils;??
2. ??
3. import?android.content.Context;??
4. import?android.view.inputmethod.InputMethodManager;??
5. import?android.widget.EditText;??
6. ??
7. /**?
8. ?*?打開或關閉軟鍵盤?
9. ?*??
10. ?*?@author?zhy?
11. ?*??
12. ?*/??
13. public?class?KeyBoardUtils??
14. {??
15. ????/**?
16. ?????*?打卡軟鍵盤?
17. ?????*??
18. ?????*?@param?mEditText?
19. ?????*????????????輸入框?
20. ?????*?@param?mContext?
21. ?????*????????????上下文?
22. ?????*/??
23. ????public?static?void?openKeybord(EditText?mEditText,?Context?mContext)??
24. ????{??
25. ????????InputMethodManager?imm?=?(InputMethodManager)?mContext??
26. ????????????????.getSystemService(Context.INPUT_METHOD_SERVICE);??
27. ????????imm.showSoftInput(mEditText,?InputMethodManager.RESULT_SHOWN);??
28. ????????imm.toggleSoftInput(InputMethodManager.SHOW_FORCED,??
29. ????????????????InputMethodManager.HIDE_IMPLICIT_ONLY);??
30. ????}??
31. ??
32. ????/**?
33. ?????*?關閉軟鍵盤?
34. ?????*??
35. ?????*?@param?mEditText?
36. ?????*????????????輸入框?
37. ?????*?@param?mContext?
38. ?????*????????????上下文?
39. ?????*/??
40. ????public?static?void?closeKeybord(EditText?mEditText,?Context?mContext)??
41. ????{??
42. ????????InputMethodManager?imm?=?(InputMethodManager)?mContext??
43. ????????????????.getSystemService(Context.INPUT_METHOD_SERVICE);??
44. ??
45. ????????imm.hideSoftInputFromWindow(mEditText.getWindowToken(),?0);??
46. ????}??
47. }??

?

9、網絡相關輔助類?NetUtils

?

?

[java]?view plaincopy

1. package?com.zhy.utils;??
2. ??
3. import?android.app.Activity;??
4. import?android.content.ComponentName;??
5. import?android.content.Context;??
6. import?android.content.Intent;??
7. import?android.net.ConnectivityManager;??
8. import?android.net.NetworkInfo;??
9. ??
10. /**?
11. ?*?跟網絡相關的工具類?
12. ?*??
13. ?*??
14. ?*??
15. ?*/??
16. public?class?NetUtils??
17. {??
18. ????private?NetUtils()??
19. ????{??
20. ????????/*?cannot?be?instantiated?*/??
21. ????????throw?new?UnsupportedOperationException("cannot?be?instantiated");??
22. ????}??
23. ??
24. ????/**?
25. ?????*?判斷網絡是否連接?
26. ?????*??
27. ?????*?@param?context?
28. ?????*?@return?
29. ?????*/??
30. ????public?static?boolean?isConnected(Context?context)??
31. ????{??
32. ??
33. ????????ConnectivityManager?connectivity?=?(ConnectivityManager)?context??
34. ????????????????.getSystemService(Context.CONNECTIVITY_SERVICE);??
35. ??
36. ????????if?(null?!=?connectivity)??
37. ????????{??
38. ??
39. ????????????NetworkInfo?info?=?connectivity.getActiveNetworkInfo();??
40. ????????????if?(null?!=?info?&&?info.isConnected())??
41. ????????????{??
42. ????????????????if?(info.getState()?==?NetworkInfo.State.CONNECTED)??
43. ????????????????{??
44. ????????????????????return?true;??
45. ????????????????}??
46. ????????????}??
47. ????????}??
48. ????????return?false;??
49. ????}??
50. ??
51. ????/**?
52. ?????*?判斷是否是wifi連接?
53. ?????*/??
54. ????public?static?boolean?isWifi(Context?context)??
55. ????{??
56. ????????ConnectivityManager?cm?=?(ConnectivityManager)?context??
57. ????????????????.getSystemService(Context.CONNECTIVITY_SERVICE);??
58. ??
59. ????????if?(cm?==?null)??
60. ????????????return?false;??
61. ????????return?cm.getActiveNetworkInfo().getType()?==?ConnectivityManager.TYPE_WIFI;??
62. ??
63. ????}??
64. ??
65. ????/**?
66. ?????*?打開網絡設置界面?
67. ?????*/??
68. ????public?static?void?openSetting(Activity?activity)??
69. ????{??
70. ????????Intent?intent?=?new?Intent("/");??
71. ????????ComponentName?cm?=?new?ComponentName("com.android.settings",??
72. ????????????????"com.android.settings.WirelessSettings");??
73. ????????intent.setComponent(cm);??
74. ????????intent.setAction("android.intent.action.VIEW");??
75. ????????activity.startActivityForResult(intent,?0);??
76. ????}??
77. ??
78. }??

?

?

10、Http相關輔助類?HttpUtils

[java]?view plaincopy

1. package?com.zhy.utils;??
2. ??
3. import?java.io.BufferedReader;??
4. import?java.io.ByteArrayOutputStream;??
5. import?java.io.IOException;??
6. import?java.io.InputStream;??
7. import?java.io.InputStreamReader;??
8. import?java.io.PrintWriter;??
9. import?java.net.HttpURLConnection;??
10. import?java.net.URL;??
11. ??
12. /**?
13. ?*?Http請求的工具類?
14. ?*??
15. ?*?@author?zhy?
16. ?*??
17. ?*/??
18. public?class?HttpUtils??
19. {??
20. ??
21. ????private?static?final?int?TIMEOUT_IN_MILLIONS?=?5000;??
22. ??
23. ????public?interface?CallBack??
24. ????{??
25. ????????void?onRequestComplete(String?result);??
26. ????}??
27. ??
28. ??
29. ????/**?
30. ?????*?異步的Get請求?
31. ?????*??
32. ?????*?@param?urlStr?
33. ?????*?@param?callBack?
34. ?????*/??
35. ????public?static?void?doGetAsyn(final?String?urlStr,?final?CallBack?callBack)??
36. ????{??
37. ????????new?Thread()??
38. ????????{??
39. ????????????public?void?run()??
40. ????????????{??
41. ????????????????try??
42. ????????????????{??
43. ????????????????????String?result?=?doGet(urlStr);??
44. ????????????????????if?(callBack?!=?null)??
45. ????????????????????{??
46. ????????????????????????callBack.onRequestComplete(result);??
47. ????????????????????}??
48. ????????????????}?catch?(Exception?e)??
49. ????????????????{??
50. ????????????????????e.printStackTrace();??
51. ????????????????}??
52. ??
53. ????????????};??
54. ????????}.start();??
55. ????}??
56. ??
57. ????/**?
58. ?????*?異步的Post請求?
59. ?????*?@param?urlStr?
60. ?????*?@param?params?
61. ?????*?@param?callBack?
62. ?????*?@throws?Exception?
63. ?????*/??
64. ????public?static?void?doPostAsyn(final?String?urlStr,?final?String?params,??
65. ????????????final?CallBack?callBack)?throws?Exception??
66. ????{??
67. ????????new?Thread()??
68. ????????{??
69. ????????????public?void?run()??
70. ????????????{??
71. ????????????????try??
72. ????????????????{??
73. ????????????????????String?result?=?doPost(urlStr,?params);??
74. ????????????????????if?(callBack?!=?null)??
75. ????????????????????{??
76. ????????????????????????callBack.onRequestComplete(result);??
77. ????????????????????}??
78. ????????????????}?catch?(Exception?e)??
79. ????????????????{??
80. ????????????????????e.printStackTrace();??
81. ????????????????}??
82. ??
83. ????????????};??
84. ????????}.start();??
85. ??
86. ????}??
87. ??
88. ????/**?
89. ?????*?Get請求，獲得返回數據?
90. ?????*??
91. ?????*?@param?urlStr?
92. ?????*?@return?
93. ?????*?@throws?Exception?
94. ?????*/??
95. ????public?static?String?doGet(String?urlStr)???
96. ????{??
97. ????????URL?url?=?null;??
98. ????????HttpURLConnection?conn?=?null;??
99. ????????InputStream?is?=?null;??
100. ????????ByteArrayOutputStream?baos?=?null;??
101. ????????try??
102. ????????{??
103. ????????????url?=?new?URL(urlStr);??
104. ????????????conn?=?(HttpURLConnection)?url.openConnection();??
105. ????????????conn.setReadTimeout(TIMEOUT_IN_MILLIONS);??
106. ????????????conn.setConnectTimeout(TIMEOUT_IN_MILLIONS);??
107. ????????????conn.setRequestMethod("GET");??
108. ????????????conn.setRequestProperty("accept",?"*/*");??
109. ????????????conn.setRequestProperty("connection",?"Keep-Alive");??
110. ????????????if?(conn.getResponseCode()?==?200)??
111. ????????????{??
112. ????????????????is?=?conn.getInputStream();??
113. ????????????????baos?=?new?ByteArrayOutputStream();??
114. ????????????????int?len?=?-1;??
115. ????????????????byte[]?buf?=?new?byte[128];??
116. ??
117. ????????????????while?((len?=?is.read(buf))?!=?-1)??
118. ????????????????{??
119. ????????????????????baos.write(buf,?0,?len);??
120. ????????????????}??
121. ????????????????baos.flush();??
122. ????????????????return?baos.toString();??
123. ????????????}?else??
124. ????????????{??
125. ????????????????throw?new?RuntimeException("?responseCode?is?not?200?...?");??
126. ????????????}??
127. ??
128. ????????}?catch?(Exception?e)??
129. ????????{??
130. ????????????e.printStackTrace();??
131. ????????}?finally??
132. ????????{??
133. ????????????try??
134. ????????????{??
135. ????????????????if?(is?!=?null)??
136. ????????????????????is.close();??
137. ????????????}?catch?(IOException?e)??
138. ????????????{??
139. ????????????}??
140. ????????????try??
141. ????????????{??
142. ????????????????if?(baos?!=?null)??
143. ????????????????????baos.close();??
144. ????????????}?catch?(IOException?e)??
145. ????????????{??
146. ????????????}??
147. ????????????conn.disconnect();??
148. ????????}??
149. ??????????
150. ????????return?null?;??
151. ??
152. ????}??
153. ??
154. ????/**??
155. ?????*?向指定?URL?發送POST方法的請求??
156. ?????*???
157. ?????*?@param?url??
158. ?????*????????????發送請求的?URL??
159. ?????*?@param?param??
160. ?????*????????????請求參數，請求參數應該是?name1=value1&name2=value2?的形式。??
161. ?????*?@return?所代表遠程資源的響應結果??
162. ?????*?@throws?Exception??
163. ?????*/??
164. ????public?static?String?doPost(String?url,?String?param)???
165. ????{??
166. ????????PrintWriter?out?=?null;??
167. ????????BufferedReader?in?=?null;??
168. ????????String?result?=?"";??
169. ????????try??
170. ????????{??
171. ????????????URL?realUrl?=?new?URL(url);??
172. ????????????//?打開和URL之間的連接??
173. ????????????HttpURLConnection?conn?=?(HttpURLConnection)?realUrl??
174. ????????????????????.openConnection();??
175. ????????????//?設置通用的請求屬性??
176. ????????????conn.setRequestProperty("accept",?"*/*");??
177. ????????????conn.setRequestProperty("connection",?"Keep-Alive");??
178. ????????????conn.setRequestMethod("POST");??
179. ????????????conn.setRequestProperty("Content-Type",??
180. ????????????????????"application/x-www-form-urlencoded");??
181. ????????????conn.setRequestProperty("charset",?"utf-8");??
182. ????????????conn.setUseCaches(false);??
183. ????????????//?發送POST請求必須設置如下兩行??
184. ????????????conn.setDoOutput(true);??
185. ????????????conn.setDoInput(true);??
186. ????????????conn.setReadTimeout(TIMEOUT_IN_MILLIONS);??
187. ????????????conn.setConnectTimeout(TIMEOUT_IN_MILLIONS);??
188. ??
189. ????????????if?(param?!=?null?&&?!param.trim().equals(""))??
190. ????????????{??
191. ????????????????//?獲取URLConnection對象對應的輸出流??
192. ????????????????out?=?new?PrintWriter(conn.getOutputStream());??
193. ????????????????//?發送請求參數??
194. ????????????????out.print(param);??
195. ????????????????//?flush輸出流的緩沖??
196. ????????????????out.flush();??
197. ????????????}??
198. ????????????//?定義BufferedReader輸入流來讀取URL的響應??
199. ????????????in?=?new?BufferedReader(??
200. ????????????????????new?InputStreamReader(conn.getInputStream()));??
201. ????????????String?line;??
202. ????????????while?((line?=?in.readLine())?!=?null)??
203. ????????????{??
204. ????????????????result?+=?line;??
205. ????????????}??
206. ????????}?catch?(Exception?e)??
207. ????????{??
208. ????????????e.printStackTrace();??
209. ????????}??
210. ????????//?使用finally塊來關閉輸出流、輸入流??
211. ????????finally??
212. ????????{??
213. ????????????try??
214. ????????????{??
215. ????????????????if?(out?!=?null)??
216. ????????????????{??
217. ????????????????????out.close();??
218. ????????????????}??
219. ????????????????if?(in?!=?null)??
220. ????????????????{??
221. ????????????????????in.close();??
222. ????????????????}??
223. ????????????}?catch?(IOException?ex)??
224. ????????????{??
225. ????????????????ex.printStackTrace();??
226. ????????????}??
227. ????????}??
228. ????????return?result;??
229. ????}??
230. }??

如果大家在使用過程中出現什么錯誤，或者有更好的建議，歡迎大家留言提出~~可以不斷的改進這些類~

?

源碼點擊下載

轉載于:https://www.cnblogs.com/wi100sh/p/5461644.html

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