登陆界面（可记住密码）

首先跟大家展示一下APP界面

接下来是APP的主要代码：

（1）Main.Activity

package com.example.login1;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class MainActivity extends Activity {

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

	}

(2)LoginActivity

package com.example.login1;

import java.util.Map;

import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;

public class LoginActivity extends MyBaseActivity {
	private SharedPreferences sp;
	private EditText et_username, et_password;
	private Button btn_login;
	private CheckBox ckb;
	private boolean result;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_login);
		et_username = (EditText) this.findViewById(R.id.login_et_username);
		et_password = (EditText) this.findViewById(R.id.login_et_password);
		btn_login = (Button) this.findViewById(R.id.login_btn_mrzx);
		btn_login.setOnClickListener(this);
		ckb= (CheckBox) this.findViewById(R.id.login_checkbox);
		ckb.setChecked(true);
	Map<String, String> map = LoginService.getsaveUserInfo(LoginActivity.this);
	if(map!=null){
		et_username.setText(map.get("user"));
		et_password.setText(map.get("password"));
	}
	}

(3)Layout文件夹下的login.xml

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="@drawable/background"
    android:gravity="center"
    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=".MainActivity" >

    <RelativeLayout
        android:id="@+id/relativeLayout3"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="vertical" >

        <RelativeLayout
            android:id="@+id/relativeLayout1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center_vertical"
            android:padding="22px" >

            <EditText
                android:id="@+id/login_et_username"
                android:layout_width="wrap_content"
                android:layout_height="40dp"
                android:layout_marginLeft="22px"
                android:layout_toRightOf="@+id/zhanghao"
                android:background="@drawable/login_et"
                android:ems="10" />

            <requestFocus />

            <TextView
                android:id="@+id/zhanghao"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignBaseline="@+id/login_et_username"
                android:layout_alignBottom="@+id/login_et_username"
                android:text="@string/login_et_username"
                android:textColor="#056aaf"
                android:textSize="18sp" />
        </RelativeLayout>

        <RelativeLayout
            android:id="@+id/relativeLayout2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignLeft="@+id/relativeLayout1"
            android:layout_below="@+id/relativeLayout1"
            android:layout_marginRight="22px"
            android:gravity="center_vertical" >

            <EditText
                android:id="@+id/login_et_password"
                android:layout_width="wrap_content"
                android:layout_height="40dp"
                android:layout_marginLeft="22px"
                android:layout_toRightOf="@+id/mima"
                android:background="@drawable/login_et"
                android:ems="10"
                android:inputType="textPassword" >
            </EditText>

            <TextView
                android:id="@+id/mima"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignBaseline="@+id/login_et_password"
                android:layout_alignBottom="@+id/login_et_password"
                android:layout_marginLeft="22px"
                android:text="@string/login_et_password"
                android:textColor="#056aaf"
                android:textSize="18sp" />
        </RelativeLayout>
    </RelativeLayout>

    <Button
        android:id="@+id/login_btn_mrzx"
        android:layout_width="wrap_content"
        android:layout_height="44dp"
        android:layout_below="@+id/login_checkbox"
        android:layout_centerHorizontal="true"
        android:layout_margin="8dp"
        android:layout_marginLeft="22px"
        android:background="@drawable/login_btn"
        android:text="@string/login_btn_normal"
        android:textColor="#056aaf"
        android:textSize="24sp" />

    <CheckBox
        android:id="@+id/login_checkbox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/login_btn_mrzx"
        android:layout_below="@+id/relativeLayout3"
        android:layout_margin="22px"
        android:layout_marginTop="14dp"
        android:text="@string/selecter_name"
        android:textColor="#056aaf"
        android:textSize="18sp" />

</RelativeLayout>

(4)Layout  文件夹下的activity-main.xml

<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="@drawable/background"
    android:gravity="center"
    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=".MainActivity" >

   
      
        

            <TextView
              
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignBaseline="@+id/login_et_password"
                android:layout_alignBottom="@+id/login_et_password"
                android:layout_marginLeft="22px"
                android:text="@string/hello"
                android:textColor="#056aaf"
                android:textSize="30sp" />
     

实验总结：

虽然未达到预期效果，但实现了登录页面和记住密码功能，有待进一步优化。