8次作业

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#E6E6E6"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/iv_head"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="40dp"
        android:src="@drawable/dddss" />

    <LinearLayout
        android:id="@+id/layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/iv_head"
        android:layout_margin="10dp"
        android:background="#ffffff"
        android:orientation="vertical" >

        <RelativeLayout
            android:id="@+id/rl_username"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="10dp" >

            <TextView
                android:id="@+id/tv_name"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:text="账号" />

            <EditText
                android:id="@+id/et_number"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_toRightOf="@+id/tv_name"
                android:background="@null" />
        </RelativeLayout>

        <View
            android:layout_width="match_parent"
            android:layout_height="2dp"
            android:background="#E6E6E6" />

        <RelativeLayout
            android:id="@+id/rl_userpsw"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="10dp" >

            <TextView
                android:id="@+id/tv_psw"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:text="密码" />

            <EditText
                android:id="@+id/et_password"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:layout_toRightOf="@+id/tv_psw"
                android:inputType="textPassword"
                android:background="@null" />
        </RelativeLayout>
    </LinearLayout>

    <Button
        android:id="@+id/btn_login"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/layout"
        android:layout_centerHorizontal="true"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="20dp"
        android:background="#3C8DC4"
        android:text="登录"
        android:textColor="#ffffff" 
        android:onClick="click"/>

</RelativeLayout>

package com.example.xff;

import java.util.HashMap;
import java.util.Map;

import android.support.v7.app.ActionBarActivity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;


public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        EditText et1 = (EditText) findViewById(R.id.et_number);
        EditText et2 = (EditText) findViewById(R.id.et_password);
        String s1 = et1.getText().toString().trim();
        String s2 = et2.getText().toString().trim();
        Button b1 = (Button) findViewById(R.id.btn_login);
        
         SharedPreferences sp = getSharedPreferences("data",MODE_PRIVATE);
         SharedPreferences.Editor editor = sp.edit(); 
         editor.putString("zh", s1);  
         editor.putString("mima", s2);  // 存入String类型数据
         //editor.putInt("age", 8);                                        // 存入int类型数据
         editor.commit();     
        
    }


    public void click(View v){
        
        SharedPreferences sp = getSharedPreferences("data",MODE_PRIVATE);
        String ac= sp.getString("zh",null);
        String mm= sp.getString("mima",null);  
        Map<String,String> userMap=new HashMap<String,String>();
        userMap.put("zh",ac);
        userMap.put("mima",mm);
        Toast.makeText(this, "登陆成功", 0).show(); 
        Toast.makeText(this, "保存成功", 0).show();