Android Menu action

MENU ボタンを押したときの動作を追加する

Sudoku/res/value/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
    Settings...
    Sudoku settings
    s
    Music
    Play background music
    Hints
    Show hints during play

Sudoku/res/menu/menu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/settings"
        android:title="@string/settings_label"
        android:alphabeticShortcut="@string/settings_shortcut"
    />
</menu>

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;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;

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;
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu){
        super.onCreateOptionsMenu(menu);
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu, menu);
        return true;
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item){
        switch (item.getItemId()){
        case R.id.settings:
            startActivity(new Intent(this, Settings.class));
            return true;
        }
        return false;
    }
}

Sudoku/res/xml/settings.xml

            android:key="music"
        android:title="@string/music_title"
        android:summary="@string/music_summary"
        android:defaultValue="true" />
            android:key="hints"
        android:title="@string/hints_title"
        android:summary="@string/hints_summary"
        android:defaultValue="true" />

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

package org.example.sudoku;

import android.os.Bundle;
import android.preference.PreferenceActivity;

public class Settings extends PreferenceActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.settings);
    }
}

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"
      android:theme="@android:style/Theme.Dialog">
    
          android:name=".Settings"
      android:label="@string/settings_title">
    
  
  
 

MENU ボタンを押すと、Settings... が表示されるようになった



Settings... をクリックすると、設定項目が表示される