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

view plainprint?

1. <!--xml version="1.0" encoding="utf-8"?-->  
2. <resources>  
3.  <string name="app_name">Sudoku</string>  
4.  <string name="main_title">Android Sudoku</string>  
5.  <string name="continue_label">Continue</string>  
6.  <string name="new_game_label">New Game</string>  
7.  <string name="about_label">About</string>  
8.  <string name="about_title">About Android Sudoku</string>  
9.  <string name="about_text">\  
10.  Sudoku is a logic-based number placement puzzle.  
11.  Starting with a partially completed 9x9 grid, the  
12.  objective is to fill the grid so that each row,  
13.  each column, and each of the 3x3 boxes   
14.  (also called <i>blocks</i>) contains the digits  
15.  1 to 9 exactly once.  
16.  </string>  
17.  <string name="exit_label">Exit</string>  
18.  <string name="settings_label">Settings...</string>  
19.  <string name="settings_title">Sudoku settings</string>  
20.  <string name="settings_shortcut">s</string>  
21.  <string name="music_title">Music</string>  
22.  <string name="music_summary">Play background music</string>  
23.  <string name="hints_title">Hints</string>  
24.  <string name="hints_summary">Show hints during play</string>  
25.  <string name="new_game_title">Difficulty</string>  
26.  <string name="easy_label">Easy</string>  
27.  <string name="medium_label">Medium</string>  
28.  <string name="hard_label">Hard</string>  
29. </resources>  

 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

view plainprint?

1. <!--xml version="1.0" encoding="utf-8"?-->  
2. <resources>  
3.  <array name="difficulty">  
4.   <item>@string/easy_label</item>  
5.   <item>@string/medium_label</item>  
6.   <item>@string/hard_label</item>  
7.  </array>  
8. </resources>  

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

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

view plainprint?

1. package org.example.sudoku;  
2.   
3. import android.app.Activity;  
4. import android.os.Bundle;  
5. import android.content.Intent;  
6. import android.view.View;  
7. import android.view.View.OnClickListener;  
8. import android.view.Menu;  
9. import android.view.MenuInflater;  
10. import android.view.MenuItem;  
11. import android.app.AlertDialog;  
12. import android.content.DialogInterface;  
13. import android.util.Log;  
14.   
15. public class Sudoku extends Activity implements OnClickListener{  
16.     /** Called when the activity is first created. */  
17.     @Override  
18.     public void onCreate(Bundle savedInstanceState) {  
19.         super.onCreate(savedInstanceState);  
20.         setContentView(R.layout.main);  
21.   
22.         View continueButton = this.findViewById(R.id.continue_button);  
23.         continueButton.setOnClickListener(this);  
24.         View newButton = this.findViewById(R.id.new_button);  
25.         newButton.setOnClickListener(this);  
26.         View aboutButton = this.findViewById(R.id.about_button);  
27.         aboutButton.setOnClickListener(this);  
28.         View exitButton = this.findViewById(R.id.exit_button);  
29.         exitButton.setOnClickListener(this);  
30.     }  
31.       
32.     public void onClick(View v) {  
33.      switch(v.getId()){  
34.      case R.id.about_button:  
35.       Intent i = new Intent(this, About.class);  
36.       startActivity(i);  
37.       break;  
38.      case R.id.new_button:  
39.       openNewGameDialog();  
40.       break;  
41.      case R.id.exit_button:  
42.       finish();  
43.       break;  
44.      }  
45.     }  
46.   
47.     @Override  
48.     public boolean onCreateOptionsMenu(Menu menu){  
49.      super.onCreateOptionsMenu(menu);  
50.      MenuInflater inflater = getMenuInflater();  
51.      inflater.inflate(R.menu.menu, menu);  
52.      return true;  
53.     }  
54.       
55.     @Override  
56.     public boolean onOptionsItemSelected(MenuItem item){  
57.      switch (item.getItemId()){  
58.      case R.id.settings:  
59.       startActivity(new Intent(this, Settings.class));  
60.       return true;  
61.      }  
62.      return false;  
63.     }  
64.       
65.     private void openNewGameDialog() {  
66.      new AlertDialog.Builder(this)  
67.       .setTitle(R.string.new_game_title)  
68.       .setItems(R.array.difficulty,   
69.       new DialogInterface.OnClickListener() {  
70.        public void onClick(DialogInterface dialoginterface, int i) {  
71.         startGame(i);  
72.        }  
73.       })  
74.       .show();  
75.     }  
76.       
77.     private static final String TAG = "Sudoku";  
78.       
79.     private void startGame(int i) {  
80.      Log.d(TAG, "clicked on " + i);  
81.      // start game here  
82.     }  
83. }  

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