權限

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

將數據寫入外部存儲設備

File directory = Environment.getExternalStorageDirectory(); File file = new File(directory+"/"+"text.txt");// 將數據寫入外部存儲設備 try {FileOutputStream fileOutputStream = new FileOutputStream(file);fileOutputStream.write("666".getBytes());fileOutputStream.close();} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace(); }

讀取外部存儲設備數據

// 讀取外部存儲設備數據 File directory1 = Environment.getExternalStorageDirectory(); File file1 = new File(directory1+"/"+"text.txt");try {FileInputStream fileInputStream = new FileInputStream(file1);byte[] byte1 = new byte[fileInputStream.available()];if(fileInputStream.read(byte1)!= -1){String data = new String(byte1);Log.w("data:", data); }} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace(); }

總結

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