Android Environment 获取各种路径的方法

1. <pre name="code" class="java">package com.deepoon.beyond.environment;
2. import android.app.Activity;
3. import android.content.Context;
4. import android.os.Bundle;
5. import android.os.Environment;
6. import android.widget.TextView;
7. import com.deepoon.beyond.R;
8. public class EnvironmentActivity extends Activity {
9. private Context mContext;
10. @Override
11. protected void onCreate(Bundle savedInstanceState) {
12. super.onCreate(savedInstanceState);
13. mContext = this;
14. setContentView(R.layout.activity_environment);
15. TextView textViewDataDirectory = (TextView) findViewById(R.id.textview_data_directory);
16. textViewDataDirectory.setText(Environment.getDataDirectory().getPath());
17. TextView textViewRootDirectory = (TextView) findViewById(R.id.textview_root_directory);
18. textViewRootDirectory.setText(Environment.getRootDirectory().getPath());
19. TextView textViewExternalStorageState = (TextView) findViewById(R.id.textview_external_storage_state);
20. textViewExternalStorageState.setText(Environment.getExternalStorageState().toString());
21. TextView textViewDownloadCacheDirectory = (TextView) findViewById(R.id.textview_download_cache_directory);
22. textViewDownloadCacheDirectory.setText(Environment.getDownloadCacheDirectory().getPath());
23. TextView textViewExternalStorageDirectory = (TextView) findViewById(R.id.textview_external_storage_directory);
24. textViewExternalStorageDirectory.setText(Environment.getExternalStorageDirectory().getPath());
25. TextView textViewExternalStorageEmulated = (TextView) findViewById(R.id.textview_external_storage_emulated);
26. textViewExternalStorageEmulated.setText("设备的外存是否是用内存模拟的: " + Environment.isExternalStorageEmulated());
27. TextView textViewExternalStorageRemovable = (TextView) findViewById(R.id.textview_external_storage_removable);
28. textViewExternalStorageRemovable.setText("设备的外存是否是可以拆卸的: " + Environment.isExternalStorageRemovable());
29. TextView textViewDirectoryAlarms = (TextView) findViewById(R.id.textview_directory_alarms);
30. textViewDirectoryAlarms.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_ALARMS).getPath());
31. TextView textViewDirectoryDCIM = (TextView) findViewById(R.id.textview_directory_dcim);
32. textViewDirectoryDCIM.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getPath());
33. TextView textViewDirectoryDocuments = (TextView) findViewById(R.id.textview_directory_documents);
34. textViewDirectoryDocuments.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS).getPath());
35. TextView textViewDirectoryDownloads = (TextView) findViewById(R.id.textview_directory_downloads);
36. textViewDirectoryDownloads.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getPath());
37. TextView textViewDirectoryMovies = (TextView) findViewById(R.id.textview_directory_movies);
38. textViewDirectoryMovies.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES).getPath());
39. TextView textViewDirectoryMusic = (TextView) findViewById(R.id.textview_directory_music);
40. textViewDirectoryMusic.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC).getPath());
41. TextView textViewDirectoryNotifications = (TextView) findViewById(R.id.textview_directory_notifications);
42. textViewDirectoryNotifications.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_NOTIFICATIONS).getPath());
43. TextView textViewDirectoryPictures = (TextView) findViewById(R.id.textview_directory_pictures);
44. textViewDirectoryPictures.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getPath());
45. TextView textViewDirectoryPodcasts = (TextView) findViewById(R.id.textview_directory_podcasts);
46. textViewDirectoryPodcasts.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PODCASTS).getPath());
47. TextView textViewDirectoryRingtones = (TextView) findViewById(R.id.textview_directory_ringtones);
48. textViewDirectoryRingtones.setText(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_RINGTONES).getPath());
49. TextView textViewFilesDir = (TextView) findViewById(R.id.textview_files_dir);
50. textViewFilesDir.setText(mContext.getFilesDir().getPath());
51. TextView textViewCacheDir = (TextView) findViewById(R.id.textview_cache_dir);
52. textViewCacheDir.setText(mContext.getCacheDir().getPath());
53. TextView textViewExternalFilesDir = (TextView) findViewById(R.id.textview_external_files_dir);
54. textViewExternalFilesDir.setText(mContext.getExternalFilesDir(Environment.DIRECTORY_MOVIES).getPath());
55. TextView textViewExternalCacheDir = (TextView) findViewById(R.id.textview_external_cache_dir);
56. textViewExternalCacheDir.setText(mContext.getExternalCacheDir().getPath());
57. }
58. }

1. </pre><pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout
3. xmlns:android="http://schemas.android.com/apk/res/android"
4. android:layout_width="match_parent"
5. android:layout_height="match_parent"
6. >
7. <ScrollView
8. android:layout_width="match_parent"
9. android:layout_height="match_parent">
10. <LinearLayout
11. android:layout_width="match_parent"
12. android:layout_height="match_parent"
13. android:gravity="center"
14. android:orientation="vertical">
15. <TextView
16. android:layout_width="wrap_content"
17. android:layout_height="wrap_content"
18. android:text="------------------Environment API-----------------------"
19. android:textSize="14sp"/>
20. <TextView
21. android:id="@+id/textview_root_directory"
22. android:layout_width="wrap_content"
23. android:layout_height="wrap_content"
24. android:textSize="14sp"/>
25. <TextView
26. android:layout_width="wrap_content"
27. android:layout_height="wrap_content"
28. android:text="Environment.getRootDirectory()"
29. android:textSize="14sp"/>
30. <TextView
31. android:id="@+id/textview_data_directory"
32. android:layout_width="wrap_content"
33. android:layout_height="wrap_content"
34. android:layout_marginTop="10dp"
35. android:textSize="14sp"/>
36. <TextView
37. android:layout_width="wrap_content"
38. android:layout_height="wrap_content"
39. android:text="Environment.getDataDirectory()"
40. android:textSize="14sp"/>
41. <TextView
42. android:id="@+id/textview_external_storage_state"
43. android:layout_width="wrap_content"
44. android:layout_height="wrap_content"
45. android:layout_marginTop="10dp"
46. android:textSize="14sp"/>
47. <TextView
48. android:layout_width="wrap_content"
49. android:layout_height="wrap_content"
50. android:text="Environment.getExternalStorageState()"
51. android:textSize="14sp"/>
52. <TextView
53. android:id="@+id/textview_download_cache_directory"
54. android:layout_width="wrap_content"
55. android:layout_height="wrap_content"
56. android:layout_marginTop="10dp"
57. android:textSize="14sp"/>
58. <TextView
59. android:layout_width="wrap_content"
60. android:layout_height="wrap_content"
61. android:text="Environment.getDownloadCacheDirectory()"
62. android:textSize="14sp"/>
63. <TextView
64. android:id="@+id/textview_external_storage_directory"
65. android:layout_width="wrap_content"
66. android:layout_height="wrap_content"
67. android:layout_marginTop="10dp"
68. android:textSize="14sp"/>
69. <TextView
70. android:layout_width="wrap_content"
71. android:layout_height="wrap_content"
72. android:text="Environment.getExternalStorageDirectory()"
73. android:textSize="14sp"/>
74. <TextView
75. android:id="@+id/textview_external_storage_emulated"
76. android:layout_width="wrap_content"
77. android:layout_height="wrap_content"
78. android:layout_marginTop="10dp"
79. android:textSize="14sp"/>
80. <TextView
81. android:layout_width="wrap_content"
82. android:layout_height="wrap_content"
83. android:text="Environment.isExternalStorageEmulated()"
84. android:textSize="14sp"/>
85. <TextView
86. android:id="@+id/textview_external_storage_removable"
87. android:layout_width="wrap_content"
88. android:layout_height="wrap_content"
89. android:layout_marginTop="10dp"
90. android:textSize="14sp"/>
91. <TextView
92. android:layout_width="wrap_content"
93. android:layout_height="wrap_content"
94. android:text="Environment.isExternalStorageRemovable()"
95. android:textSize="14sp"/>
96. <TextView
97. android:layout_width="wrap_content"
98. android:layout_height="wrap_content"
99. android:layout_marginTop="10dp"
100. android:text="注意：传入的类型参数不能是null，返回的目录路径有可能不存在，所以必须在使用之前确认一下，比如使用File.mkdirs创建该路径"
101. android:textSize="14sp"/>
102. <TextView
103. android:id="@+id/textview_directory_alarms"
104. android:layout_width="wrap_content"
105. android:layout_height="wrap_content"
106. android:textSize="14sp"/>
107. <TextView
108. android:layout_width="wrap_content"
109. android:layout_height="wrap_content"
110. android:text="系统提醒铃声: Environment.DIRECTORY_ALARMS"
111. android:textSize="14sp"/>
112. <TextView
113. android:id="@+id/textview_directory_dcim"
114. android:layout_width="wrap_content"
115. android:layout_height="wrap_content"
116. android:layout_marginTop="10dp"
117. android:textSize="14sp"/>
118. <TextView
119. android:layout_width="wrap_content"
120. android:layout_height="wrap_content"
121. android:text="相机拍摄照片和视频: Environment.DIRECTORY_DCIM"
122. android:textSize="14sp"/>
123. <TextView
124. android:id="@+id/textview_directory_documents"
125. android:layout_width="wrap_content"
126. android:layout_height="wrap_content"
127. android:layout_marginTop="10dp"
128. android:textSize="14sp"/>
129. <TextView
130. android:layout_width="wrap_content"
131. android:layout_height="wrap_content"
132. android:text="文档: Environment.DIRECTORY_DOCUMENTS"
133. android:textSize="14sp"/>
134. <TextView
135. android:id="@+id/textview_directory_downloads"
136. android:layout_width="wrap_content"
137. android:layout_height="wrap_content"
138. android:layout_marginTop="10dp"
139. android:textSize="14sp"/>
140. <TextView
141. android:layout_width="wrap_content"
142. android:layout_height="wrap_content"
143. android:text="下载: Environment.DIRECTORY_DOWNLOADS"
144. android:textSize="14sp"/>
145. <TextView
146. android:id="@+id/textview_directory_movies"
147. android:layout_width="wrap_content"
148. android:layout_height="wrap_content"
149. android:layout_marginTop="10dp"
150. android:textSize="14sp"/>
151. <TextView
152. android:layout_width="wrap_content"
153. android:layout_height="wrap_content"
154. android:text="电影: Environment.DIRECTORY_MOVIES"
155. android:textSize="14sp"/>
156. <TextView
157. android:id="@+id/textview_directory_music"
158. android:layout_width="wrap_content"
159. android:layout_height="wrap_content"
160. android:layout_marginTop="10dp"
161. android:textSize="14sp"/>
162. <TextView
163. android:layout_width="wrap_content"
164. android:layout_height="wrap_content"
165. android:text="音乐: Environment.DIRECTORY_MUSIC"
166. android:textSize="14sp"/>
167. <TextView
168. android:id="@+id/textview_directory_notifications"
169. android:layout_width="wrap_content"
170. android:layout_height="wrap_content"
171. android:layout_marginTop="10dp"
172. android:textSize="14sp"/>
173. <TextView
174. android:layout_width="wrap_content"
175. android:layout_height="wrap_content"
176. android:text="系统通知铃声: Environment.DIRECTORY_NOTIFICATIONS"
177. android:textSize="14sp"/>
178. <TextView
179. android:id="@+id/textview_directory_pictures"
180. android:layout_width="wrap_content"
181. android:layout_height="wrap_content"
182. android:layout_marginTop="10dp"
183. android:textSize="14sp"/>
184. <TextView
185. android:layout_width="wrap_content"
186. android:layout_height="wrap_content"
187. android:text="图片: Environment.DIRECTORY_PICTURES"
188. android:textSize="14sp"/>
189. <TextView
190. android:id="@+id/textview_directory_podcasts"
191. android:layout_width="wrap_content"
192. android:layout_height="wrap_content"
193. android:layout_marginTop="10dp"
194. android:textSize="14sp"/>
195. <TextView
196. android:layout_width="wrap_content"
197. android:layout_height="wrap_content"
198. android:text="系统广播: Environment.DIRECTORY_PODCASTS"
199. android:textSize="14sp"/>
200. <TextView
201. android:id="@+id/textview_directory_ringtones"
202. android:layout_width="wrap_content"
203. android:layout_height="wrap_content"
204. android:layout_marginTop="10dp"
205. android:textSize="14sp"/>
206. <TextView
207. android:layout_width="wrap_content"
208. android:layout_height="wrap_content"
209. android:text="系统铃声: Environment.DIRECTORY_RINGTONES"
210. android:textSize="14sp"/>
211. <TextView
212. android:layout_width="wrap_content"
213. android:layout_height="wrap_content"
214. android:text="--------------------Context API------------------------"
215. android:layout_marginTop="10dp"
216. android:textSize="14sp"/>
217. <TextView
218. android:id="@+id/textview_files_dir"
219. android:layout_width="wrap_content"
220. android:layout_height="wrap_content"
221. android:layout_marginTop="10dp"
222. android:textSize="14sp"/>
223. <TextView
224. android:layout_width="wrap_content"
225. android:layout_height="wrap_content"
226. android:text="应用的在系统内部Files: Context.getFilesDir()"
227. android:textSize="14sp"/>
228. <TextView
229. android:id="@+id/textview_cache_dir"
230. android:layout_width="wrap_content"
231. android:layout_height="wrap_content"
232. android:layout_marginTop="10dp"
233. android:textSize="14sp"/>
234. <TextView
235. android:layout_width="wrap_content"
236. android:layout_height="wrap_content"
237. android:text="应用的在系统内部Cache: Context.getCacheDir()"
238. android:textSize="14sp"/>
239. <TextView
240. android:id="@+id/textview_external_files_dir"
241. android:layout_width="wrap_content"
242. android:layout_height="wrap_content"
243. android:layout_marginTop="10dp"
244. android:textSize="14sp"/>
245. <TextView
246. android:layout_width="wrap_content"
247. android:layout_height="wrap_content"
248. android:text="应用的在SDCard Files: Context.getExternalFilesDir()"
249. android:textSize="14sp"/>
250. <TextView
251. android:id="@+id/textview_external_cache_dir"
252. android:layout_width="wrap_content"
253. android:layout_height="wrap_content"
254. android:layout_marginTop="10dp"
255. android:textSize="14sp"/>
256. <TextView
257. android:layout_width="wrap_content"
258. android:layout_height="wrap_content"
259. android:text="应用的在SDCard Files: Context.getExternalCacheDir()"
260. android:textSize="14sp"/>
261. </LinearLayout>
262. </ScrollView>
263. </LinearLayout>