android txt写入文件

public boolean saveData(String data) {

try {

File file = new File(Environment.getExternalStorageDirectory()

+ "/aa.txt");

if (!file.exists())

file.createNewFile();

FileOutputStream fos = new FileOutputStream(file, true);

OutputStreamWriter wt = new OutputStreamWriter(fos, "GBK");

// wt.write(data.getBytes());

wt.write(data);

wt.flush();

wt.close();

fos.close();

return true;

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

return false;

}