版权声明：本文可能为博主原创文章，若标明出处可随便转载。 https://blog.csdn.net/Jailman/article/details/78020173
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="online.geekgalaxy.layoutlearn">
<application
android: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 {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//login button
final 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 button
final 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();
}
});
}
}
login.java
package online.geekgalaxy.layoutlearn;
import android.app.Activity;
import android.os.Bundle;
/**
* Created by jailman on 2017/9/18.
*/
public class login extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
}
}
register.java
package online.geekgalaxy.layoutlearn;
import android.app.Activity;
import android.os.Bundle;
/**
* Created by jailman on 2017/9/18.
*/
public class register extends Activity{
@Override
protected 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">
<Button
android: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" />
<Button
android: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" />
<EditText
android: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" />
<EditText
android: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" />
<TextView
android: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>
login.xml
<?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">
<TextView
android: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>
register.xml
<?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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_vertical|center_horizontal"
android:orientation="vertical">
<EditText
android:id="@+id/editText5"
android:layout_width="270dp"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Username"
android:inputType="textPersonName" />
<EditText
android:id="@+id/editText6"
android:layout_width="270dp"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Email"
android:inputType="textPersonName" />
<EditText
android:id="@+id/editText7"
android:layout_width="270dp"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Password"
android:inputType="textPassword" />
<EditText
android:id="@+id/editText8"
android:layout_width="270dp"
android:layout_height="wrap_content"
android:ems="10"
android:hint="Confirm password"
android:inputType="textPassword" />
<Button
android: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 25
buildToolsVersion "25.0.3"
defaultConfig {
applicationId "online.geekgalaxy.layoutlearn"
minSdkVersion 19
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles 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'
}
