Android - リストからの選択 -

android.util.Log クラスは、Android のシステムログに
メッセージを出力するメソッドを持っている

・Log.e()：エラー
・Log.w()：警告
・Log.i()：情報
・Log.d()：デバッグ
・Log.v()：冗長

Eclipse でこのログをみるには
[Window] -> [Show View] -> [Other...] -> [Android] -> [LogCat]




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
 Settings...
 Sudoku settings
 s
 Music
 Play background music
 Hints
 Show hints during play
 Difficulty
 Easy
 Medium
 Hard

リストの形式を記述

Sudoku/res/values/arrays.xml

 
  @string/easy_label
  @string/medium_label
  @string/hard_label
 

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;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.util.Log;

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;
     case R.id.new_button:
      openNewGameDialog();
      break;
     case R.id.exit_button:
      finish();
      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;
    }
    
    private void openNewGameDialog() {
     new AlertDialog.Builder(this)
      .setTitle(R.string.new_game_title)
      .setItems(R.array.difficulty, 
      new DialogInterface.OnClickListener() {
       public void onClick(DialogInterface dialoginterface, int i) {
        startGame(i);
       }
      })
      .show();
    }
    
    private static final String TAG = "Sudoku";
    
    private void startGame(int i) {
     Log.d(TAG, "clicked on " + i);
     // start game here
    }
}

Exit ボタンを押したとき、Activity を破棄するために
finish()
を呼び出す



New Game　をクリックすると難易度の選択ポップアップが表示される