資深工讀生清心記事

[Android] Android的資料儲存-SDcard的讀寫

19 10 月, 2015 by com88_lcs74

權限的開放,在AndroidManifest.xml加入

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

SDcard的寫入

File filename = new File(Environment.getExternalStorageDirectory(), "myfile.txt");
try {
FileOutputStream fout = new FileOutputStream(filename);
fout.write("test".getBytes());
fout.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

SDcard的讀取

try {
FileInputStream fin = new FileInputStream(filename);
BufferedReader reader = new BufferedReader(new InputStreamReader(fin));
String content = reader.readLine();
reader.close();
fin.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}