简单登陆UI设计

简单UI设计

作品效果图：

关键技术：

    　　用到了本地化控件：SharedPreferences，简单的说就是本地配置。

四大组件：Intent

基本思路请看代码：

　　Java代码：

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

 public class MainActivity extends Activity {
     private Button  logIn;
     private CheckBox rember,auto;
     private EditText name,password;
     private SharedPreferences test;
     private SharedPreferences.Editor editor;
     private boolean haved;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

         logIn= (Button) findViewById(R.id.button1);
         rember=(CheckBox) findViewById(R.id.remberFlag);
         auto=(CheckBox)    findViewById(R.id.autoRunFlag);
         name=(EditText) findViewById(R.id.name);
         password=(EditText) findViewById(R.id.password);
         final Intent intent=new Intent(MainActivity.this,NewMainActivity.class);
         //打开 或 创建一个名为UserData的xml文件
         test=getSharedPreferences("UserData", Context.MODE_PRIVATE);
         editor=test.edit();

         if(test.getBoolean("auto",false)!=false)
         {
             startActivity(intent);
         }

         if(test.getBoolean("rember", false)!=false)
             {
                 String temp;
                 if((temp=test.getString("name", null))!=null)
                     name.setText(temp);
                 if((temp=test.getString("password",null)) != null)
                     password.setText(temp);
                 rember.setChecked(true);
                 haved=true;
             }

         logIn.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 if(haved == false )
                 {
                     if(rember.isChecked())
                     {
                         editor.putBoolean("rember", true);
                         editor.putString("name", name.getText().toString());
                         editor.putString("password", password.getText().toString());
                         editor.commit();
                     }
                     if(auto.isChecked()==true)
                         editor.putBoolean("auto", true);
                 }
                 startActivity(intent);
             }
         });
     }
 }

　　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: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" >

     <EditText
         android:id="@+id/name"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_alignLeft="@+id/password"
         android:layout_alignParentTop="true"
         android:layout_marginTop="16dp"
         android:ems="10" />

     <EditText
         android:id="@+id/password"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_below="@+id/name"
         android:layout_centerHorizontal="true"
         android:layout_marginTop="18dp"
         android:ems="10" >

         <requestFocus />
     </EditText>

     <Button
         android:id="@+id/button1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignLeft="@+id/password"
         android:layout_below="@+id/password"
         android:layout_marginLeft="16dp"
         android:text="登陆" />

     <CheckBox
         android:id="@+id/autoRunFlag"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignLeft="@+id/password"
         android:layout_below="@+id/button1"
         android:text="自动登陆" />

     <CheckBox
         android:id="@+id/remberFlag"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignBaseline="@+id/autoRunFlag"
         android:layout_alignBottom="@+id/autoRunFlag"
         android:layout_alignRight="@+id/password"
         android:text="记住密码" />

 </RelativeLayout>

activity_second.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: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" >

    <RatingBar
        android:id="@+id/ratingBar1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="170dp" />

</RelativeLayout>

AndroidMainifest中要注册：

 <activity
            android:name="com.example.log_in.NewMainActivity"
            android:label="second_activity" >
        </activity>