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>