android.os.Environment类的使用及代码示例

x33g5p2x  于2022-01-18 转载在 其他  
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本文整理了Java中android.os.Environment类的一些代码示例，展示了Environment类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Environment类的具体详情如下：
包路径：android.os.Environment
类名称：Environment

Environment介绍

暂无

代码示例

代码示例来源：origin: jeasonlzy/okhttp-OkGo

  1. public FileConvert(String fileName) {
  2.   this(Environment.getExternalStorageDirectory() + DM_TARGET_FOLDER, fileName);
  3. }

代码示例来源：origin: yanzhenjie/NoHttp

  1. public static boolean sdCardIsAvailable() {
  2.   if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
  3.     File sd = new File(Environment.getExternalStorageDirectory().getAbsolutePath());
  4.     return sd.canWrite();
  5.   } else return false;
  6. }

代码示例来源：origin: square/leakcanary

  1. private File externalStorageDirectory() {
  2.  File downloadsDirectory = Environment.getExternalStoragePublicDirectory(DIRECTORY_DOWNLOADS);
  3.  return new File(downloadsDirectory, "leakcanary-" + context.getPackageName());
  4. }

代码示例来源：origin: JZ-Darkal/AndroidHttpCapture

  1. /**
  2.  * 获取外部存储目录，一般是/sdcard/ 如果不存在，就返回/data/
  3.  */
  4. public static File getDataRoot() {
  5.   try {
  6.     if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED) ||
  7.         (Environment.getExternalStorageDirectory().exists() && Environment.getExternalStorageDirectory().canWrite())) {
  8.       return Environment.getExternalStorageDirectory();
  9.     } else {
  10.       return Environment.getDataDirectory();
  11.     }
  12.   } catch (Exception e) {
  13.     return null;
  14.   }
  15. }

代码示例来源：origin: libgdx/libgdx

  1. @Override
  2. public boolean isExternalStorageAvailable () {
  3.   return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
  4. }

代码示例来源：origin: robolectric/robolectric

  1. @Test
  2. @Config(minSdk = LOLLIPOP)
  3. public void storageIsLazy() {
  4.  assertNull(ShadowEnvironment.EXTERNAL_CACHE_DIR);
  5.  assertNull(ShadowEnvironment.EXTERNAL_FILES_DIR);
  6.  Environment.getExternalStorageDirectory();
  7.  Environment.getExternalStoragePublicDirectory(null);
  8.  assertNotNull(ShadowEnvironment.EXTERNAL_CACHE_DIR);
  9.  assertNotNull(ShadowEnvironment.EXTERNAL_FILES_DIR);
  10. }

代码示例来源：origin: robolectric/robolectric

  1. @Test
  2. @Config(minSdk = M)
  3. public void isExternalStorageRemovable_primaryShouldReturnSavedValue() {
  4.  assertThat(Environment.isExternalStorageRemovable()).isFalse();
  5.  ShadowEnvironment.setExternalStorageRemovable(Environment.getExternalStorageDirectory(), true);
  6.  assertThat(Environment.isExternalStorageRemovable()).isTrue();
  7. }

代码示例来源：origin: lovetuzitong/MultiImageSelector

  1. public static File createTmpFile(Context context) throws IOException{
  2.   File dir = null;
  3.   if(TextUtils.equals(Environment.getExternalStorageState(), Environment.MEDIA_MOUNTED)) {
  4.     dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
  5.     if (!dir.exists()) {
  6.       dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM + "/Camera");
  7.       if (!dir.exists()) {
  8.         dir = getCacheDirectory(context, true);
  9.       }
  10.     }
  11.   }else{
  12.     dir = getCacheDirectory(context, true);
  13.   }
  14.   return File.createTempFile(JPEG_FILE_PREFIX, JPEG_FILE_SUFFIX, dir);
  15. }

代码示例来源：origin: zaaach/CityPicker

  1. public DBManager(Context context) {
  2.   this.mContext = context;
  3.   DB_PATH = File.separator + "data"
  4.       + Environment.getDataDirectory().getAbsolutePath() + File.separator
  5.       + context.getPackageName() + File.separator + "databases" + File.separator;
  6.   copyDBFile();
  7. }

代码示例来源：origin: libgdx/libgdx

  1. @Override
  2. public boolean isExternalStorageAvailable () {
  3.   return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
  4. }

代码示例来源：origin: TommyLemon/APIJSON

  1. private static CityDB openCityDB(Context context, String packageName) {
  2.   String path = "/data"
  3.       + Environment.getDataDirectory().getAbsolutePath()
  4.       + File.separator + packageName + File.separator
  5.       + CityDB.CITY_DB_NAME;
  6.   File db = new File(path);
  7.   if (!db.exists()) {
  8.     try {
  9.       InputStream is = context.getAssets().open("city.db");
  10.       FileOutputStream fos = new FileOutputStream(db);
  11.       int len = -1;
  12.       byte[] buffer = new byte[1024];
  13.       while ((len = is.read(buffer)) != -1) {
  14.         fos.write(buffer, 0, len);
  15.         fos.flush();
  16.       }
  17.       fos.close();
  18.       is.close();
  19.     } catch (IOException e) {
  20.       e.printStackTrace();
  21.       System.exit(0);
  22.     }
  23.   }
  24.   return new CityDB(context, path);
  25. }

代码示例来源：origin: k9mail/k-9

  1. @Override
  2.   public File getRoot(Context context) {
  3.     return Environment.getExternalStorageDirectory();
  4.   }
  5. }

代码示例来源：origin: nostra13/Android-Universal-Image-Loader

  1. /**
  2.  * Returns specified application cache directory. Cache directory will be created on SD card by defined path if card
  3.  * is mounted and app has appropriate permission. Else - Android defines cache directory on device's file system.
  4.  *
  5.  * @param context  Application context
  6.  * @param cacheDir Cache directory path (e.g.: "AppCacheDir", "AppDir/cache/images")
  7.  * @return Cache {@link File directory}
  8.  */
  9. public static File getOwnCacheDirectory(Context context, String cacheDir) {
  10.   File appCacheDir = null;
  11.   if (MEDIA_MOUNTED.equals(Environment.getExternalStorageState()) && hasExternalStoragePermission(context)) {
  12.     appCacheDir = new File(Environment.getExternalStorageDirectory(), cacheDir);
  13.   }
  14.   if (appCacheDir == null || (!appCacheDir.exists() && !appCacheDir.mkdirs())) {
  15.     appCacheDir = context.getCacheDir();
  16.   }
  17.   return appCacheDir;
  18. }

代码示例来源：origin: Rukey7/MvpApp

  1. /**
  2.  * 获取SD卡的状态
  3.  */
  4. public static String getState() {
  5.   return Environment.getExternalStorageState();
  6. }

代码示例来源：origin: facebook/facebook-android-sdk

  1. private Uri getTempUri() {
  2.     String imgFileName = FILE_PREFIX + System.currentTimeMillis() + FILE_SUFFIX;
  3.     // Note: on an emulator, you might need to create the "Pictures" directory in
  4.     //         /mnt/sdcard first
  5.     //       % adb shell
  6.     //       % mkdir /mnt/sdcard/Pictures
  7.     File image = new File(
  8.         Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
  9.         imgFileName);
  10.     return Uri.fromFile(image);
  11.   }
  12. }

代码示例来源：origin: HotBitmapGG/bilibili-android-client

  1. /**
  2.  * 获取手机内部存储总空间
  3.  */
  4. public static long getPhoneTotalSize() {
  5.   if (!checkSdCard()) {
  6.     File path = Environment.getDataDirectory();
  7.     StatFs mStatFs = new StatFs(path.getPath());
  8.     long blockSizeLong = mStatFs.getBlockSizeLong();
  9.     long blockCountLong = mStatFs.getBlockCountLong();
  10.     return blockSizeLong * blockCountLong;
  11.   } else {
  12.     return getSDcardTotalSize();
  13.   }
  14. }

代码示例来源：origin: Curzibn/Luban

  1. /**
  2.  * <b>BuildTime:</b> 2014-10-22<br>
  3.  * <b>Description:</b> get SDCard path<br>
  4.  *
  5.  * @return String of path
  6.  */
  7. public static String getSDCardPath() {
  8.  return Environment.getExternalStorageDirectory().getPath();
  9. }

代码示例来源：origin: nostra13/Android-Universal-Image-Loader

  1. /**
  2.  * Returns specified application cache directory. Cache directory will be created on SD card by defined path if card
  3.  * is mounted and app has appropriate permission. Else - Android defines cache directory on device's file system.
  4.  *
  5.  * @param context  Application context
  6.  * @param cacheDir Cache directory path (e.g.: "AppCacheDir", "AppDir/cache/images")
  7.  * @return Cache {@link File directory}
  8.  */
  9. public static File getOwnCacheDirectory(Context context, String cacheDir, boolean preferExternal) {
  10.   File appCacheDir = null;
  11.   if (preferExternal && MEDIA_MOUNTED.equals(Environment.getExternalStorageState()) && hasExternalStoragePermission(context)) {
  12.     appCacheDir = new File(Environment.getExternalStorageDirectory(), cacheDir);
  13.   }
  14.   if (appCacheDir == null || (!appCacheDir.exists() && !appCacheDir.mkdirs())) {
  15.     appCacheDir = context.getCacheDir();
  16.   }
  17.   return appCacheDir;
  18. }

代码示例来源：origin: Rukey7/MvpApp

  1. /**
  2.  * 获取SD卡的状态
  3.  */
  4. public static String getState() {
  5.   return Environment.getExternalStorageState();
  6. }

代码示例来源：origin: naman14/Timber

  1. public String getLastFolder() {
  2.   return mPreferences.getString(LAST_FOLDER, Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC).getPath());
  3. }

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