內(nèi)存卡的數(shù)據(jù)保存與讀取

發(fā)布時(shí)間：2020-07-17 00:37:52 來(lái)源：網(wǎng)絡(luò) 閱讀：353 作者：lang螞蟻欄目：軟件技術(shù)

,內(nèi)存卡

2.1數(shù)據(jù)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();

}

2.2數(shù)據(jù)讀取

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();

}

3,sharedprefrence (****)

btn_ok.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

String user = et_user.getText().toString().trim();

String pwd = et_pwd.getText().toString().trim();

if(user.isEmpty()||pwd.isEmpty()){

Toast.makeText(getApplicationContext(), "不能為空", 200).show();

//獲取編輯器

Editor edit = sp.edit();

//保存數(shù)據(jù)

edit.putString("name", user);

edit.putString("pwd", pwd);

//提交保存

edit.commit();

}

});

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