數據存儲之--內存卡的存儲

發布時間：2020-07-09 15:20:23 來源：網絡閱讀：267 作者：InProvence 欄目：開發技術

1，數據的保存

File file=new File(Environment.getExternalStorageDirectory(), name);

try {

FileOutputStream fos=new FileOutputStream(file);

fos.write(content.getBytes());

fos.close();

Toast.makeText(getApplicationContext(),"保存成功", 200).show();

}catch (Exception e) {

Toast.makeText(getApplicationContext(),"保存失敗", 200).show();

e.printStackTrace();

}

2，數據的讀取

File file = new File(Environment.getExternalStorageDirectory(), name);

try {

FileInputStream fis= new FileInputStream(file);

BufferedReader br =new BufferedReader(new InputStreamReader(fis));

//讀取文檔的數據

String content =br.readLine();

//拆分字符串

String [] str =content.split("=");

//顯示數據

if(!content.isEmpty()){

et_name.setText(str[0]);

et_password.setText(str[1]);

}

} catch (Exception e) {

e.printStackTrace();

}

});

注意：保存數據記得注冊

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

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

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