LoginActivity.java
包 com.hyx.example.mymap;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
公共类 LoginActivity扩展 Activity {
private EditText username = null ;
private EditText password = null ;
private Button login = null ;
private SharedPreferences sharedPreferences ;
//初始化控件
公共无效的init(){
用户名 =(的EditText)findViewById(R.id。 username_edit);
密码 =(的EditText)findViewById(R.id。 userpassword_edit);
login =(Button)findViewById( R.id.login_button);
}
@Override
protected void onCreate(Bundle savedInstanceState){
super .onCreate(savedInstanceState);
的setContentView(R.layout 登录); //显示自己的UI视图
// 初始化控件
init();
//调用验证是否第一次登录方法
userUpdate();
//调用登录验证方法
loginVerify();
}
//判断是否第一次登录初始化用户名密码
public void userUpdate(){
//读取文件内容
sharedPreferences = getSharedPreferences( “myfile”, MODE_PRIVATE);
//读取数据
String susername = sharedPreferences .getString( “username”, “”);
String spwd = sharedPreferences .getString(“pwd”,“”);
//第一次进入程序读取用户名密码为空,则写入初始化数据并提示用户
if(susername.equals(“”)&& spwd.equals(“”)){
//写入数据
SharedPreferences.Editor editor = sharedPreferences .edit();
editor.putString(“username”,“admin”);
editor.putString(“pwd”,“123456”);
//提交数据
editor.commit();
吐司。makeText(LoginActivity。这个,“初始化用户名管理员密码123456” ,
吐司。LENGTH_LONG)。show();
}
}
//登录验证
public void loginVerify(){
//点击登录按钮所发生的事件。(1,验证合法2,验证不合法)
login .setOnClickListener( new OnClickListener(){
@Override
public void onClick(查看arg0){
//定义变量
String strUsername,strPassword;
//得到输入框内容
strUsername = username .getText()。toString();
strPassword = password .getText()。toString();
//读取文件内容得到用户名密码
sharedPreferences = getSharedPreferences( “myfile”, MODE_PRIVATE);
//读取数据
String susername = sharedPreferences .getString( “username”, “”);
String spwd = sharedPreferences .getString(“pwd”,“”);
//登录校验
if(strUsername.equals(susername)&& strPassword.equals(spwd)){
//登录成功后提示
Toast。makeText(LoginActivity。这个, “登陆成功!” ,
吐司。LENGTH_SHORT).show();
//登陆成功后切换到MainActivity.class
意图意图= 新意图(LoginActivity。此,
主要活动。课程);
//启动
startActivity(intent);
//登录成功后销毁登录界面
finish();
} else {
吐司。makeText(LoginActivity。这个,“登陆失败!” ,
吐司。LENGTH_SHORT).show();
}
}
});
}
// @Override
// public boolean onCreateOptionsMenu(菜单菜单){
// getMenuInflater()。inflate(R.menu.main,menu);
//返回true;
//}
}
login.xml
< RelativeLayout xmlns:android = “http://schemas.android.com/apk/res/android”
xmlns:custom = “http://schemas.android.com/apk/res-auto”
android :layout_width = “match_parent “
android :layout_height = ”match_parent“
android :fitsSystemWindows = ”true“ >
< RelativeLayout
android :id = “@ + id / login_layout”
android :layout_width = “match_parent”
android :layout_height = “wrap_content”
android :layout_marginLeft = “20dp”
android :layout_marginRight = “20dp”
android :gravity = “center” >
< FrameLayout
android :id = “@ + id / username_layout”
android :layout_width = “fill_parent”
android :layout_height = “wrap_content”
android :layout_marginTop = “55dp”
android :gravity = “center” >
< EditText
android :id = “@ + id / username_edit”
android :layout_width = “match_parent”
android :layout_height = “55dp”
android :layout_marginTop = “5dp”
android :hint = “账号/手机号/邮箱”
android :paddingRight = “60dp”
android :maxLength = “20”
android :paddingLeft = “55dp” >
</ EditText >
< ImageView
android :layout_width = “22dp”
android :layout_height = “21dp”
android :layout_marginStart = “8dp”
android :layout_gravity = “left | center_vertical”
android :background = “@ drawable / zhanghao”
android :visibility = “visible” / >
< TextView
android :id = “@ + id / contry_sn”
android :layout_width = “40dp”
android :layout_height = “50dp”
android :layout_gravity = “left | center_vertical”
android :layout_marginTop = “4dp”
android :gravity = “center”
android :text = “+ 62” android :textColor = “@
android :color / black”
android :textSize = “18sp”
android :visibility = “invisible” />
</ FrameLayout >
< FrameLayout
android :id = “@ + id / usercode_layout”
android :layout_width = “fill_parent”
android :layout_height = “wrap_content”
android :layout_below = “@ id / username_layout”
android :layout_marginTop = “6dp”
android :gravity = “center “ >
< EditText
android :id = “@ + id / userpassword_edit”
android :layout_width = “match_parent”
android :layout_height = “55dp”
android :hint = “密码”
android :inputType = “textPassword”
android :paddingRight = “60dp”
android : maxLength = “20”
android :paddingLeft = “55dp” >
</ EditText >
< ImageView
android :layout_width = “24dp”
android :layout_height = “22dp”
android :layout_marginStart = “7dp”
android :layout_gravity = “left | center_vertical”
android :background = “@ drawable / mima” />
< 按钮
android :id = “@ + id / passwordeye”
android :layout_width = “23dp”
android :layout_height = “23dp”
android :background = “@ drawable / kejian”
android :layout_gravity = “right | center_vertical”
android :layout_marginRight = “10dp”
/>
</ FrameLayout >
< Button
android :id = “@ + id / login_button”
android :layout_width = “wrap_content”
android :layout_height = “45dp”
android :layout_below = “@ + id / usercode_layout”
android :layout_centerHorizontal = “true”
android :layout_marginTop = “ 34dp“
android :background = ”@ drawable / bluebutton“
android :textSize = ”18sp“ android :text = ” 登录
“
android :textColor = ”#fffffff“ />
< Button
android :id = “@ + id / login_error”
android :layout_width = “wrap_content”
android :layout_height = “wrap_content”
android :layout_alignRight = “@ id / login_button”
android :layout_below = “@ id / login_button”
android :text = “忘记密码”
android :background = “#00000000”
android :textSize = “16sp” />
< Button
android :id = “@ + id / register”
android :layout_width = “wrap_content”
android :layout_height = “wrap_content”
android :layout_alignLeft = “@ id / login_button”
android :layout_below = “@ id / login_button”
android :background = “#00000000”
android :gravity = “left | center_vertical”
android :text = “注册”
android :textSize = “16sp”
android :visibility = “visible” />
</ RelativeLayout >
< RelativeLayout
android :id = “@ + id / remember_layout000”
android :layout_width = “wrap_content”
android :layout_height = “wrap_content”
android :layout_alignParentBottom = “true”
android :layout_marginBottom = “1dp”
android :layout_marginLeft = “20dp”
android : layout_marginRight = “20dp” >
</ RelativeLayout >
</ RelativeLayout >
注意:一定要在AndroidManifest.xml里加activity啊!!!
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