用户登录界面的设置

       

     

     

       

                                     图  1-6

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="wrap_content"android:padding="@dimen/activity_horizontal_margin"android:background="@drawable/logintop_roundbg"><EditTextandroid:id="@+id/etName"android:layout_width="match_parent"android:layout_height="wrap_content"android:ems="10"android:background="@android:drawable/edit_text"android:drawableLeft="@drawable/icon_user"android:drawablePadding="10dp"android:hint="@string/etName" ><requestFocus/></EditText>&l4000t;EditTextandroid:id="@+id/etPassword"android:layout_below="@id/etName"android:inputType="textPassword"android:layout_width="match_parent"android:layout_height="wrap_content"android:ems="10"android:background="@android:drawable/edit_text"android:drawableLeft="@drawable/icon_pass"android:drawablePadding="10dp"android:hint="@string/etPass" ><requestFocus/></EditText><LinearLayoutandroid:layout_below="@id/etPassword"android:layout_width="match_parent"android:layout_height="wrap_content"><CheckBoxandroid:text="记住密码"android:layout_width="0dp"android:layout_height="wrap_content"android:id="@+id/cbIsRememberPass"android:textSize="20sp"android:layout_weight="1"/>/><Buttonandroid:layout_width="0dp"android:layout_height="wrap_content"android:layout_weight="1"android:background="@drawable/btn_select"android:onClick="login"android:text="登录"/></LinearLayout></RelativeLayout>

（2）在layout下新建一个名为activity_login.xml的文件,具体代码如下：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:id="@+id/activity_login"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"android:background="@drawable/loginbg"tools:context="cn.edu.bzu.a01.LoginActivity"><include layout="@layout/login_top"></include><ImageViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"app:srcCompat="@drawable/deer"android:id="@+id/imageView"android:layout_alignParentBottom="true"android:layout_alignParentRight="true"android:layout_alignParentEnd="true"android:layout_marginRight="12dp"android:layout_marginEnd="12dp"android:layout_marginBottom="32dp" /></RelativeLayout>

（3）在layout下新建一个名为activity_main.xml的文件，具体代码如下：

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"    [b]android:id="@+id/activity_main"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="cn.edu.bzu.a01.MainActivity"><TextViewandroid:text="Welcome you"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerVertical="true"android:layout_centerHorizontal="true"android:textSize="40sp"android:id="@+id/textView" /></RelativeLayout>

（4）在drawable下新建一个名为btn_select.xml的文件,具体代码如下：

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android"><item android:drawable="@drawable/btn_shape" android:state_pressed="false"></item><item android:drawable="@drawable/btn_shape_after" android:state_pressed="true"></item>

</selector>

（5）在drawable下新建一个名为btn_shape.xml的文件,具体代码如下：

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"><solid android:color="#FF72CAE1"></solid><corners android:radius="10dp"></corners></shape>

（6）在drawable下新建一个名为loginbg.xml的文件,具体代码如下：

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"><gradientandroid:startColor="#FFACDAE5"android:endColor="#FF72CAE1"android:angle="45"/></shape>

（7）在drawable下新建一个名为logintop_roundbg.xml的文件,具体代码如下：

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"><corners android:radius="10dp"></corners><solid android:color="#55FFFFFF"></solid></shape>

（8）在values下的strings.xml文件中，具体代码如下：

    <string name="app_name">01</string><string name="etName">请输入账号</string><string name="etPass">请输入密码</string><string name="btnLogin">登录</string><string name="btnRegister">注册</string></resources>

（9）在java下的LoginActivity文件下：

package cn.edu.bzu.a01;import android.content.Context;import android.content.Intent;import android.content.SharedPreferences;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.CheckBox;import android.widget.EditText;import android.widget.Toast;public class LoginActivity extends AppCompatActivity {private EditText etName;private EditText etPassword;private CheckBox cbIsRememberPass;private SharedPreferences sharedPreferences;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_login);initView();sharedPreferences=getSharedPreferences("data", Context.MODE_PRIVATE);boolean isRemember=sharedPreferences.getBoolean("remamberpassword",false);if (isRemember){String name=sharedPreferences.getString("name","");String password=sharedPreferences.getString("password","");etName.setText(name);etPassword.setText(password);cbIsRememberPass.setChecked(true);}}private void initView() {etName= (EditText) findViewById(R.id.etName);etPassword= (EditText) findViewById(R.id.etPassword);cbIsRememberPass= (CheckBox) findViewById(R.id.cbIsRememberPass);}public void login(View view){String name=etName.getText().toString();String password=etPassword.getText().toString();if("admin".equals(name)&&"123456".equals(password)){SharedPreferences.Editor editor=sharedPreferences.edit();if(cbIsRememberPass.isChecked()){editor.putBoolean("remamberpassword",true);editor.putString("name",name);editor.putString("password",password);}else{editor.clear();}editor.commit();Intent intent=new Intent(this,MainActivity.class);startActivity(intent);finish();}else{Toast.makeText(this, "账号或密码错误", Toast.LENGTH_SHORT).show();}}}

（10）在java下新建一个Activity-MainActivity文件，具体代码如下：

package cn.edu.bzu.a01;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;public class MainActivity extends AppCompatActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}}