数据的保存和读取

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();

}else{

String name="data.txt";

String content=user+"="+pwd;

try {

FileOutputStream fos=openFileOutput(name, MODE_PRIVATE);

fos.write(content.getBytes());

fos.close();

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

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

});

btn_show.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

String name="data.txt";

try {

FileInputStream fis=openFileInput(name);

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

//读取文档的数据

String content = br.readLine();

//拆分字符串

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

//显示的数据

if(!content.isEmpty()){

et_user.setText(strs[0]);

et_pwd.setText(strs[1]);

}

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

});