LoginActivity程式碼如下：

package cn.edu.bzu.a01;

import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;
import android.widget.EditText;
import 
 
android.widget.Toast;

public class LoginActivity extends AppCompatActivity {
    private EditText etName;
    private EditText etPassword;
    private CheckBox cbIsRememberPass;
    private SharedPreferences sharedPreferences;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super
 
.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);

        initView();
        sharedPreferences=getSharedPreferences("data", Context.MODE_PRIVATE);
        boolean isRemember=sharedPreferences.getBoolean("rememberpassword",false);
        if (isRemember){
            String name=sharedPreferences.getString("name"
 
,"");
            String password=sharedPreferences.getString("password","");
            etName.setText(name);
            etPassword.setText(password);
            cbIsRememberPass.setChecked(true);
        }

    }

    private void initView() {
        etName= (EditText) findViewById(R.id.etName);
        etPassword= (EditText) findViewById(R.id.etPassword);
        cbIsRememberPass= (CheckBox) findViewById(R.id.cbIsRememberPass);

    }

    public void login(View view){
        String name=etName.getText().toString();
        String password=etPassword.getText().toString();
        if("admin".equals(name)&&"123456".equals(password)){
            SharedPreferences.Editor editor=sharedPreferences.edit();
            if(cbIsRememberPass.isChecked()){
                editor.putBoolean("rememberpassword",true);
                editor.putString("name",name);
                editor.putString("password",password);

            }else{
                editor.clear();
            }
               editor.commit();
            Intent intent=new Intent(this,MainActivity.class);
            startActivity(intent);
            finish();

        }else{
            Toast.makeText(this, "賬號或密碼錯誤", Toast.LENGTH_SHORT).show();
        }

    }
}

package cn.edu.bzu.a01;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_login"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:background="@drawable/loginbg"
tools:context="cn.edu.bzu.a01.LoginActivity">

 <include layout="@layout/login_top"></include>

 <ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@drawable/deer"
android:id="@+id/imageView"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_marginRight="12dp"
android:layout_marginEnd="12dp"
android:layout_marginBottom="32dp" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="cn.edu.bzu.a01.MainActivity">

    <TextView
android:text="Welcome you"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:textSize="40sp"
android:id="@+id/textView" />
</RelativeLayout>

layout中activity_top.xml程式碼:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="@dimen/activity_horizontal_margin"
android:background="@drawable/logintop_roundbg">

    <EditText
android:id="@+id/etName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:background="@android:drawable/edit_text"
android:drawableLeft="@drawable/icon_user"
android:drawablePadding="10dp"
android:hint="@string/etName" >
    <requestFocus/>
    </EditText>
    <EditText
android:id="@+id/etPassword"
android:layout_below="@id/etName"
android:inputType="textPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:background="@android:drawable/edit_text"
android:drawableLeft="@drawable/icon_pass"
android:drawablePadding="10dp"
android:hint="@string/etPass" >
        <requestFocus/>
    </EditText>
    <LinearLayout
android:layout_below="@id/etPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content">

        <CheckBox
android:text="記住密碼"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:id="@+id/cbIsRememberPass"
android:textSize="20sp"
android:layout_weight="1"/>
 />
        <Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@drawable/btn_select"
android:onClick="login"
android:text="登入"/>
    </LinearLayout>



</RelativeLayout>