安卓注册登录界面示例

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="online.geekgalaxy.layoutlearn"><applicationandroid:allowBackup="true"android:icon="@mipmap/ic_launcher"android:label="@string/app_name"android:roundIcon="@mipmap/ic_launcher_round"android:supportsRtl="true"android:theme="@style/AppTheme"><activity android:name=".MainActivity"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><activity android:name=".login"><intent-filter><action android:name="android.intent.action.MAIN" /></intent-filter></activity><activity android:name=".register"><intent-filter><action android:name="android.intent.action.MAIN" /></intent-filter></activity></application></manifest>

MainActivity.java

package online.geekgalaxy.layoutlearn;import android.content.DialogInterface;
import android.content.Intent;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;public class MainActivity extends AppCompatActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//login buttonfinal Button login = (Button) findViewById(R.id.button);final String user = "admin";final String pass = "hello";login.setOnClickListener(new View.OnClickListener() {public void onClick(View view) {String username = "";EditText editText1 = (EditText)findViewById(R.id.editText);username = editText1.getText().toString();String password = "";EditText editText2 = (EditText)findViewById(R.id.editText2);password = editText2.getText().toString();if (username.equals(user) & password.equals(pass)) {Intent intent = new Intent(MainActivity.this, login.class);startActivity(intent);}else {new AlertDialog.Builder(MainActivity.this).setTitle("Error!").setMessage("Wrong username or password.").setNegativeButton("OK",null).show();}}});//register buttonfinal Button register = (Button) findViewById(R.id.button2);register.setOnClickListener(new View.OnClickListener() {public void onClick(View view) {//提示框确定是否跳转new AlertDialog.Builder(MainActivity.this).setTitle("Jump").setMessage("Ready to jump?").setPositiveButton("Yes", new DialogInterface.OnClickListener() {public void onClick(DialogInterface dialog, int which) {Intent intent = new Intent(MainActivity.this, register.class);startActivity(intent);}}).setNegativeButton("No",null).show();}});}
}

package online.geekgalaxy.layoutlearn;import android.app.Activity;
import android.os.Bundle;/*** Created by jailman on 2017/9/18.*/public class login extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.login);}
}

package online.geekgalaxy.layoutlearn;import android.app.Activity;
import android.os.Bundle;/*** Created by jailman on 2017/9/18.*/public class register extends Activity{@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.register);}
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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:layout_width="match_parent"android:layout_height="match_parent"android:layout_centerVertical="true"tools:context="online.geekgalaxy.layoutlearn.MainActivity"><Buttonandroid:id="@+id/button"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginRight="68dp"android:text="@string/login"app:layout_constraintRight_toLeftOf="@+id/button2"tools:layout_constraintTop_creator="1"android:layout_marginEnd="68dp"android:layout_marginTop="26dp"app:layout_constraintTop_toBottomOf="@+id/editText2" /><Buttonandroid:id="@+id/button2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/register"tools:layout_constraintTop_creator="1"tools:layout_constraintRight_creator="1"android:layout_marginEnd="68dp"app:layout_constraintRight_toRightOf="parent"android:layout_marginTop="26dp"app:layout_constraintTop_toBottomOf="@+id/editText2" /><EditTextandroid:id="@+id/editText"android:layout_width="240dp"android:layout_height="45dp"android:layout_marginBottom="35dp"android:layout_marginEnd="68dp"android:layout_marginLeft="8dp"android:layout_marginRight="8dp"android:layout_marginStart="68dp"android:ems="10"android:hint="@string/username"android:inputType="textPersonName"app:layout_constraintBottom_toTopOf="@+id/editText2"app:layout_constraintHorizontal_bias="0.516"app:layout_constraintLeft_toLeftOf="@+id/editText2"app:layout_constraintRight_toRightOf="@+id/editText2"tools:layout_constraintLeft_creator="1"tools:layout_constraintRight_creator="1"tools:layout_editor_absoluteX="-15dp"tools:layout_editor_absoluteY="152dp" /><EditTextandroid:id="@+id/editText2"android:layout_width="240dp"android:layout_height="45dp"android:layout_marginEnd="69dp"android:layout_marginLeft="0dp"android:layout_marginRight="0dp"android:layout_marginStart="69dp"android:ems="10"android:hint="@string/password"android:inputType="textPassword"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintLeft_toLeftOf="@+id/button"app:layout_constraintRight_toRightOf="@+id/button2"app:layout_constraintTop_toTopOf="parent"tools:layout_constraintBottom_creator="1"tools:layout_constraintLeft_creator="1"tools:layout_constraintRight_creator="1"tools:layout_constraintTop_creator="1" /><TextViewandroid:id="@+id/textView2"android:layout_width="250dp"android:layout_height="65dp"android:layout_marginBottom="50dp"android:layout_marginLeft="8dp"android:layout_marginRight="8dp"android:autoText="false"android:text="Welcome"android:textAlignment="center"android:textSize="50sp"android:textStyle="bold"app:layout_constraintBottom_toTopOf="@+id/editText"app:layout_constraintHorizontal_bias="0.509"app:layout_constraintLeft_toLeftOf="@+id/editText"app:layout_constraintRight_toRightOf="@+id/editText" /></android.support.constraint.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:weightSum="1"><TextViewandroid:id="@+id/textView3"android:layout_width="0dp"android:layout_height="118dp"android:layout_marginTop="200dp"android:layout_weight="1"android:text="@string/great_you_ve_login"android:textAlignment="center"android:textSize="24sp"android:textStyle="bold" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"><LinearLayoutandroid:layout_width="match_parent"android:layout_height="match_parent"android:gravity="center_vertical|center_horizontal"android:orientation="vertical"><EditTextandroid:id="@+id/editText5"android:layout_width="270dp"android:layout_height="wrap_content"android:ems="10"android:hint="Username"android:inputType="textPersonName" /><EditTextandroid:id="@+id/editText6"android:layout_width="270dp"android:layout_height="wrap_content"android:ems="10"android:hint="Email"android:inputType="textPersonName" /><EditTextandroid:id="@+id/editText7"android:layout_width="270dp"android:layout_height="wrap_content"android:ems="10"android:hint="Password"android:inputType="textPassword" /><EditTextandroid:id="@+id/editText8"android:layout_width="270dp"android:layout_height="wrap_content"android:ems="10"android:hint="Confirm password"android:inputType="textPassword" /><Buttonandroid:id="@+id/button3"android:layout_width="270dp"android:layout_height="wrap_content"android:text="Submit" /></LinearLayout>
</LinearLayout>

strings.xml

<resources><string name="app_name">LayoutLearn</string><string name="login">Login</string><string name="register">Register</string><string name="username">Username</string><string name="password">Password</string><string name="great_you_ve_login">Great, you\'ve logged in!</string>
</resources>

build.gradle

apply plugin: 'com.android.application'android {compileSdkVersion 25buildToolsVersion "25.0.3"defaultConfig {applicationId "online.geekgalaxy.layoutlearn"minSdkVersion 19targetSdkVersion 25versionCode 1versionName "1.0"testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"}buildTypes {release {minifyEnabled falseproguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'}}
}dependencies {compile fileTree(dir: 'libs', include: ['*.jar'])androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {exclude group: 'com.android.support', module: 'support-annotations'})compile 'com.android.support:appcompat-v7:25.3.1'compile 'com.android.support.constraint:constraint-layout:1.0.2'testCompile 'junit:junit:4.12'
}