,内存卡
2.1数据保存
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(), "保存失败", 200).show(); e.printStackTrace(); }
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2.2数据读取
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(), "保存失败", 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(), "不能为空", 200).show(); //获取编辑器 Editor edit = sp.edit(); //保存数据 edit.putString("name", user); edit.putString("pwd", pwd); //提交保存 edit.commit(); } } }); |
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