Android 文件保存到应用和sd卡中，androidsd,1.权限添加 <use
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Android 文件保存到应用和sd卡中，androidsd,1.权限添加 1.权限添加 <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
public static String getDataFolderPath(Context paramContext) { return Environment.getDataDirectory() + "/data/" + paramContext.getPackageName() + "/files"; } public static String getMyFileDir(Context context){ return context.getFilesDir().toString(); } public static String getMyCacheDir(Context context){ return context.getCacheDir().toString(); } /** * @desc 保存内容到文件中 * @param fileName * @param content * @throws Exception */ public static void save(Context context, String fileName, String content, int module) { try { FileOutputStream os = context.openFileOutput(fileName, module); os.write(content.getBytes()); os.close(); } catch (Exception e) { e.printStackTrace(); } } /** * @desc 读取文件内容 * @param fileName * @return */ public static String read(Context context, String fileName){ try { FileInputStream fis = context.openFileInput(fileName); ByteArrayOutputStream bos = new ByteArrayOutputStream(); byte[] b = new byte[1024]; int len = 0; while((len = fis.read(b)) != -1){ bos.write(b, 0, len); } byte[] data = bos.toByteArray(); fis.close(); bos.close(); return new String(data); } catch (Exception e) { e.printStackTrace(); } return null; } /** * @desc 将文本内容保存到sd卡的文件中 * @param context * @param fileName * @param content * @throws IOException */ public static void saveToSDCard(Context context, String fileName, String content) throws IOException{ File file = new File(Environment.getExternalStorageDirectory(),fileName); FileOutputStream fos = new FileOutputStream(file); fos.write(content.getBytes()); fos.close(); } /** * @desc 读取sd卡文件内容 * @param fileName * @return * @throws IOException */ public static String readSDCard(String fileName) throws IOException { File file = new File(Environment.getExternalStorageDirectory(),fileName); FileInputStream fis = new FileInputStream(file); ByteArrayOutputStream bos = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int len = 0; while((len = fis.read(buffer)) != -1) { bos.write(buffer, 0, len); } byte[] data = bos.toByteArray(); fis.close(); bos.close(); return new String(data); }
1.权限添加 <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
public static String getDataFolderPath(Context paramContext) { return Environment.getDataDirectory() + "/data/" + paramContext.getPackageName() + "/files"; } public static String getMyFileDir(Context context){ return context.getFilesDir().toString(); } public static String getMyCacheDir(Context context){ return context.getCacheDir().toString(); } /** * @desc 保存内容到文件中 * @param fileName * @param content * @throws Exception */ public static void save(Context context, String fileName, String content, int module) { try { FileOutputStream os = context.openFileOutput(fileName, module); os.write(content.getBytes()); os.close(); } catch (Exception e) { e.printStackTrace(); } } /** * @desc 读取文件内容 * @param fileName * @return */ public static String read(Context context, String fileName){ try { FileInputStream fis = context.openFileInput(fileName); ByteArrayOutputStream bos = new ByteArrayOutputStream(); byte[] b = new byte[1024]; int len = 0; while((len = fis.read(b)) != -1){ bos.write(b, 0, len); } byte[] data = bos.toByteArray(); fis.close(); bos.close(); return new String(data); } catch (Exception e) { e.printStackTrace(); } return null; } /** * @desc 将文本内容保存到sd卡的文件中 * @param context * @param fileName * @param content * @throws IOException */ public static void saveToSDCard(Context context, String fileName, String content) throws IOException{ File file = new File(Environment.getExternalStorageDirectory(),fileName); FileOutputStream fos = new FileOutputStream(file); fos.write(content.getBytes()); fos.close(); } /** * @desc 读取sd卡文件内容 * @param fileName * @return * @throws IOException */ public static String readSDCard(String fileName) throws IOException { File file = new File(Environment.getExternalStorageDirectory(),fileName); FileInputStream fis = new FileInputStream(file); ByteArrayOutputStream bos = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int len = 0; while((len = fis.read(buffer)) != -1) { bos.write(buffer, 0, len); } byte[] data = bos.toByteArray(); fis.close(); bos.close(); return new String(data); }
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