Android サンプルプログラム
MainActivity
package com.example.non.myapplication;
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.support.v7.widget.ButtonBarLayout;
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);
final EditText input_user =(EditText) findViewById(R.id.input_user_id);
final EditText input_password =(EditText) findViewById(R.id.input_password);
final Button login_button = (Button) findViewById(R.id.login_button);
final Button screen_button = (Button) findViewById(R.id.screen_two_button);
final AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
login_button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if(input_user.getText().toString().equals("kapibara") && input_password.getText().toString().equals("san")){
Intent intent = new Intent(getApplication(), SubScreen.class);
startActivity(intent);
}else{
// アラートダイアログのタイトルを設定します
alertDialogBuilder.setTitle("エラー");
// アラートダイアログのメッセージを設定します
alertDialogBuilder.setMessage("ユーザー名またはパスワードが違います");
alertDialogBuilder.setPositiveButton("OK",null);
// アラートダイアログを表示します
alertDialogBuilder.show();
}
}
});
screen_button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(getApplication(), ScreenTwo.class);
startActivity(intent);
}
});
}
}
SubScreen
package com.example.non.myapplication;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
public class SubScreen extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sub_screen_layout);
}
}
ScreenTwo
package com.example.non.myapplication;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
public class ScreenTwo extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.screen_two_layout);
}
}
activity_main.xml
<?xml version = "1.0" encoding = "utf-8"?>
<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"
tools:context = ".MainActivity">
<TextView
android:id="@+id/text_view"
android:text = "Non Login"
android:layout_width="wrap_content"
android:layout_height = "wrap_content"
android:textSize = "30dp"
android:layout_marginTop="18dp"
android:layout_alignParentTop="true"
android:layout_alignLeft="@+id/input_user_id"
android:layout_alignStart="@+id/input_user_id" />
<EditText
android:id = "@+id/input_user_id"
android:layout_width = "200dp"
android:layout_height = "wrap_content"
android:focusable = "true"
android:layout_below="@+id/text_view"
android:layout_alignLeft="@+id/input_password"
android:layout_alignStart="@+id/input_password"
android:layout_marginTop="16dp" />
<EditText
android:id="@+id/input_password"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:ems="10"
android:layout_marginTop="29dp"
android:layout_below="@+id/input_user_id"
android:layout_alignLeft="@+id/login_button"
android:layout_alignStart="@+id/login_button" />
<Button
android:id="@+id/login_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="11dp"
android:text="login"
android:layout_marginLeft="104dp"
android:layout_marginStart="104dp"
android:layout_below="@+id/input_password"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Button
android:id="@+id/screen_two_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/login_button"
android:layout_alignEnd="@+id/input_user_id"
android:layout_alignRight="@+id/input_user_id"
android:text="Screen 2" />
</RelativeLayout>
sub_screen_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<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"
tools:context = ".SubScreen">
<TextView
android:id="@+id/success"
android:textSize="50dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="ログイン成功" />
</RelativeLayout>
screen_two_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<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"
tools:context = ".ScreenTwo">
<TextView
android:id="@+id/textView"
android:textSize="50dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Screen 2" />
</RelativeLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.non.myapplication"
android:versionCode="1"
android:versionName="1.1">
<uses-permission android:name="android.permission.INTERNET" />
<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=".ScreenTwo"
android:label="ScreenTwo" >
</activity>
<activity
android:name=".SubScreen"
android:label="SubScreen" >
</activity>
</application>
</manifest>