Android で数独 - onClick -

新しい Activity を定義して起動する。

レイアウトを設定
Sudoku/res/layout/about.xml

 xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:padding="10dip"
>
 android:id="@+id/about_content"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="@string/about_text"
/>

More...

Sudoku/res/values/strings.xml

 Sudoku
 Android Sudoku
 Continue
 New Game
 About
 About Android Sudoku
 \
 Sudoku is a logic-based number placement puzzle.
 Starting with a partially completed 9x9 grid, the
 objective is to fill the grid so that each row,
 each column, and each of the 3x3 boxes 
 (also called blocks) contains the digits
 1 to 9 exactly once.
 
 Exit

Sudoku/src/org/example/sudoku/About.java

package org.example.sudoku;

import android.app.Activity;
import android.os.Bundle;

public class About extends Activity{
 @Override
 protected void onCreate(Bundle saveInstanceState) {
  super.onCreate(saveInstanceState);
  setContentView(R.layout.about);
 }
}

Sudoku/src/org/example/sudoku/Sudoku.java

package org.example.sudoku;

import android.app.Activity;
import android.os.Bundle;
import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;

public class Sudoku extends Activity implements OnClickListener{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        View continueButton = this.findViewById(R.id.continue_button);
        continueButton.setOnClickListener(this);
        View newButton = this.findViewById(R.id.new_button);
        newButton.setOnClickListener(this);
        View aboutButton = this.findViewById(R.id.about_button);
        aboutButton.setOnClickListener(this);
        View exitButton = this.findViewById(R.id.exit_button);
        exitButton.setOnClickListener(this);
    }
    
    public void onClick(View v) {
     switch(v.getId()){
     case R.id.about_button:
      Intent i = new Intent(this, About.class);
      startActivity(i);
      break;
     }
    }
    
}

Sudoku/AndroidManifest.xml

   xmlns:android="http://schemas.android.com/apk/res/android"
   package="org.example.sudoku"
   android:versionCode="1"
   android:versionName="1.0">
         android:icon="@drawable/icon" 
      android:label="@string/app_name">
              android:name=".Sudoku"
        android:label="@string/app_name">
      
        
        
      
      
              android:name=".About"
        android:label="@string/about_title">
      
   
   
 

About ボタンをクリックするとこんな感じ