简单登陆UI设计

[b]简单UI设计[/b]

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>