{"id":375,"date":"2014-02-01T13:18:53","date_gmt":"2014-02-01T04:18:53","guid":{"rendered":"http:\/\/www.typea.info\/blog\/index.php\/2014\/02\/01\/android_asynctask\/"},"modified":"2014-02-01T13:18:53","modified_gmt":"2014-02-01T04:18:53","slug":"android_asynctask","status":"publish","type":"post","link":"https:\/\/www.typea.info\/blog\/index.php\/2014\/02\/01\/android_asynctask\/","title":{"rendered":"Android AsyncTask \u306f\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u306e\u51e6\u7406\u306b\u96c6\u4e2d\u3059\u3079\u3057\uff01"},"content":{"rendered":"

Android \u3067\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u304d\u306a\u3069\u306f\u3001\u975e\u540c\u671f\u30bf\u30b9\u30af\u3067\u3042\u308b\u3001AsyncTask<\/a> \u3092\u5229\u7528\u3059\u308b\u3002<\/p>\n

\u975e\u540c\u671f\u51e6\u7406\u306fUI\u30b9\u30ec\u30c3\u30c9\u3068\u306f\u5225\u306b\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u30b9\u30ec\u30c3\u30c9\u3067\u5b9f\u884c\u3055\u308c\u308b\u3001doInBackground()<\/a> \u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u3053\u3068\u3067\u5b9f\u73fe\u3059\u308b\u3002<\/p>\n

\u3067\u3001\u51e6\u7406\u7d50\u679c\u306fUI\u30b9\u30ec\u30c3\u30c9\u3068\u540c\u671f\u3055\u308c\u308b\u3001onPostExecute()<\/a> \u3067\u51e6\u7406\u3059\u308b\u3002<\/p>\n

\u591a\u304f\u306e\u5834\u5408\u306f\u3001\u7d50\u679c\u3092UI\u5074\u306b\u53cd\u6620\u3055\u305b\u305f\u3044\u306f\u305a\u3002<\/p>\n

\u3053\u3046\u3044\u3046\u5834\u5408\u3001\u4e00\u756a\u5358\u7d14\u306a\u6226\u7565\u306f<\/p>\n

1.Activiti\u306e\u30a4\u30f3\u30ca\u30fc\u30af\u30e9\u30b9\u3068\u3057\u3066\u3001\u975e\u540c\u671f\u51e6\u7406\u3092\u4f5c\u6210\u3057Activity\u306e\u30e1\u30f3\u30d0\u30fc\u3092\u5171\u6709\u3059\u308b\u65b9\u6cd5<\/h3>\n

\u3053\u3068\u3060\u308d\u3046(\u533f\u540d\u30af\u30e9\u30b9\u3092\u5229\u7528\u3059\u308b\u6226\u7565\u3082\u3042\u308b\u304c\u3001\u7701\u7565)<\/p>\n

\u64ec\u4f3c\u30b3\u30fc\u30c9\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u611f\u3058\u306b\u306a\u308b\u304b<\/p>\n

public class HogeActivity extends Activity {\r\n    private EditText mEditText = null;\r\n    \r\n    @Override\r\n    protected void onCreate(Bundle savedInstanceState) {\r\n        super.onCreate(savedInstanceState);\r\n        setContentView(R.layout.hoge_activity);\r\n\r\n        mEditText = (EditText)findViewById(R.id.text1);\r\n        \r\n         ((Button)findViewById(R.id.button1)).setOnClickListener(new View.OnClickListener() {\r\n            @Override\r\n            public void onClick(View arg0) {\r\n                \/\/ \u975e\u540c\u671f\u51e6\u7406\u306e\u547c\u3073\u51fa\u3057\r\n                String[] params = null;\r\n                (new HogeTask()).execute(params);\r\n            }\r\n        });\r\n    }\r\n\r\n    public class HogeTask extends AsyncTask {\r\n        @Override\r\n        protected String doInBackground(String ... parm) {\r\n            String result = null;\r\n            \r\n            \/\/ \u4f55\u3089\u304b\u306e\u51e6\u7406\u3092\u884c\u3044\u7d50\u679c\u3092\u8fd4\u3059\r\n            \r\n            return result;\r\n        }\r\n        \r\n        @Override\r\n        protected void onPostExecute(String result) {\r\n            \/\/ \u3053\u3053\u3067\u7d50\u679c\u3092\u30c6\u30ad\u30b9\u30c8\u30dc\u30c3\u30af\u30b9\u306b\u66f8\u304d\u8fbc\u3080\r\n            mEditText.setText(result);\r\n        }\r\n    }\r\n}<\/pre>\n
\u3044\u308d\u3044\u308d\u66f8\u3044\u305f\u304c\u3001\u4e00\u756a\u91cd\u8981\u306a\u306e\u306f\u3001mEditText\u3092Acivity \u3068 AsyncTask \u304c\u5171\u6709\u3057\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u3002<\/p>\n
\u307e\u3041\u3053\u308c\u3067\u3059\u3081\u3070\u3044\u3044\u306e\u3060\u304c\u3001\u3055\u3059\u304c\u306b\u7d50\u5408\u5ea6\u304c\u9ad8\u3059\u304e\u308b\u3068\u3044\u3046\u304b\u4f7f\u3044\u56de\u3057\u304c\u52b9\u304b\u306a\u3044\u306e\u3067\u3001\u6c4e\u7528\u7684\u306a\u51e6\u7406\u306a\u3089\u65e9\u6669Activity \u304b\u3089\u8131\u51fa\u3055\u305b\u308b\u3053\u3068\u306b\u306a\u308b\u3060\u308d\u3046\u3002<\/p>\n
\u305d\u3046\u3059\u308b\u3068\u3001Activity\u5074\u306eUI\u30a6\u30a3\u30b8\u30a7\u30c3\u30c8\u306b\u3069\u306e\u3088\u3046\u306b\u30a2\u30af\u30bb\u30b9\u3055\u305b\u308b\u304b\u3068\u3044\u3046\u8a71\u306b\u306a\u308b\u306e\u3060\u304c\u3001\u4f8b\u3048\u3070\u3001AsyncTask\u5074\u306b\u3001Activity \u306e\u53c2\u7167\u3092\u6301\u305f\u305b\u305f\u308a\u3057\u3066\u3082\u304a\u305d\u3089\u304f\u52d5\u304f\u3060\u308d\u3046\u304c\u3001\u3053\u308c\u3067\u306f\u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\u3092\u5206\u3051\u305f\u3060\u3051\u3067\u7d50\u5408\u5ea6\u304c\u9ad8\u3044\u307e\u307e\u3002<\/p>\n
2.AsyncTask \u306b\u30ea\u30b9\u30ca\u30fc\u3092\u767b\u9332\u3057\u3066Activity \u3092\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3059\u308b\u65b9\u6cd5<\/h3>\n
\u3068\u3044\u3046\u306e\u304c\u3001\u7d20\u76f4\u306b\u8003\u3048\u308b\u3068\u73fe\u5b9f\u7684\u306a\u6226\u7565\u306a\u306e\u304b\u306a\u3068\u601d\u3046\u3002<\/p>\n
\u30b0\u30b0\u308b\u3068\u4e8b\u4f8b\u3082\u7d50\u69cb\u3042\u308b<\/a><\/p>\n
Activity<\/p>\n
public class HogeActivity extends Activity implements AsyncTaskCallBackListener{\r\n    private EditText mEditText = null;\r\n    \r\n    @Override\r\n    protected void onCreate(Bundle savedInstanceState) {\r\n        super.onCreate(savedInstanceState);\r\n        setContentView(R.layout.hoge_activity);\r\n\r\n        mEditText = (EditText)findViewById(R.id.text1);\r\n        \r\n         ((Button)findViewById(R.id.button1)).setOnClickListener(new View.OnClickListener() {\r\n            @Override\r\n            public void onClick(View arg0) {\r\n                \/\/ \u975e\u540c\u671f\u51e6\u7406\u306e\u547c\u3073\u51fa\u3057\r\n                String[] params = null;\r\n                (new HogeTask()).execute(params);\r\n            }\r\n        });\r\n    }\r\n\r\n    \/\/ AsyncTaskCallBackListener \u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\r\n    @Override\r\n    protected void onPostExecute(String result) {\r\n        mEditText.setText(result);\r\n    }\r\n\r\n}<\/pre>\n
CallbackListener<\/p>\n
public interface AsyncTaskCallbackListener {\r\n    public onPostExecute(String result);\r\n}<\/pre>\n
AsyncTask<\/p>\n
public class HogeTask extends AsyncTask {\r\n    private AsyncTaskCallbackListener listener = null;\r\n    \r\n    public void setAsyncTaskCallbackListener(AsyncTaskCallbackListener listener) {\r\n        this.listener = listener;\r\n    }\r\n    \r\n    @Override\r\n    protected String doInBackground(String ... parm) {\r\n        String result = null;\r\n        \r\n        \/\/ \u4f55\u3089\u304b\u306e\u51e6\u7406\u3092\u884c\u3044\u7d50\u679c\u3092\u8fd4\u3059\r\n        \r\n        return result;\r\n    }\r\n    \r\n    @Override\r\n    protected void onPostExecute(String result) {\r\n        \/\/ \u3053\u3053\u3067\u30ea\u30b9\u30ca\u30fc\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u547c\u3073\u51fa\u3059\r\n        if (listener != null) {\r\n            listener.onPostExecute(result);\r\n        }\r\n    }\r\n}<\/pre>\n
\u30b0\u30b0\u3063\u305f\u4e8b\u4f8b\u3092\u3057\u3063\u304b\u308a\u898b\u3066\u3044\u306a\u3044\u306e\u3060\u304c\u3001\u304a\u305d\u3089\u304f\u3053\u3093\u306a\u611f\u3058\u306b\u306a\u308b\u306e\u3067\u306f\u306a\u3044\u3060\u308d\u3046\u304b(\u3053\u3053\u307e\u3067\u306e\u4f8b\u793a\u306f\u64ec\u4f3c\u30b3\u30fc\u30c9\u3067\u52d5\u4f5c\u3055\u305b\u3066\u3044\u306a\u3044\u306e\u3067\u3042\u3057\u304b\u3089\u305a)\u3002<\/p>\n
\u81ea\u5206\u3082\u4eca\u307e\u3067\u306f\u3053\u3093\u306a\u611f\u3058\u3067\u66f8\u3044\u3066\u304d\u305f\u3002<\/p>\n
\u3053\u308c\u3067\u3001AsyncTask \u3068 Activity \u306f\u30ea\u30b9\u30ca\u30fc\u3092\u4ecb\u3057\u3066\u7d50\u5408\u3055\u308c\u308b\u3053\u3068\u306b\u306a\u308b\u306e\u3067\u3001\u7d50\u5408\u5ea6\u306f\u5c0f\u3055\u304f\u306a\u308b\u3057\u3001AsyncTask\u3092\u5229\u7528\u3057\u305f\u3044\u3068\u3053\u308d\u3067\u306f\u3001\u30ea\u30b9\u30ca\u30fc\u3092\u5229\u7528\u3059\u308c\u3070\u3088\u3044\u3002<\/p>\n
 <\/p>\n
3.AcyncTask \u306f\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u306e\u51e6\u7406\u3060\u3051\u306b\u96c6\u4e2d<\/h3>\n
\u78ba\u304b\u306b\u30ea\u30b9\u30ca\u30fc\u3092\u5229\u7528\u3059\u308b\u65b9\u6cd5\u304c\u304c\u5805\u3044\u3068\u306f\u601d\u3046\u306e\u3060\u304c\u3001\u540c\u3058\u3088\u3046\u306aTask\u3092\u3044\u304f\u3064\u304b\u4f5c\u308d\u3046\u3068\u3059\u308b\u3068\u3001AsyncTask \u3092\u7d99\u627f\u3057\u3066\u3001\u72ec\u81ea\u306e\u62bd\u8c61\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3066\u3001\u305d\u3053\u3067\u30ea\u30b9\u30ca\u30fc\u767b\u9332\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u3092\u7528\u610f\u3057\u3066\u3001\u30ea\u30b9\u30ca\u30fc\u306f\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u578b\u306b\u5bfe\u5fdc\u51fa\u6765\u308b\u3088\u3046\u306b\u3057\u3066\u3002\u3002\u3002<\/p>\n
\u3068\u3001\u30af\u30e9\u30b9\u968e\u5c64\u3092\u8003\u3048\u305f\u308a\u4f5c\u6210\u3057\u305f\u308a\u3068\u3044\u3046\u306e\u3082\u307e\u3041\u697d\u3057\u3044\u306e\u3060\u304c\u3001\u3053\u306e\u5834\u5408\u6c4e\u7528\u7684\u306a\u3068\u3053\u308d\u306b\u843d\u3068\u305d\u3046\u3068\u3059\u308b\u3068\u3061\u3087\u3063\u3068\u3057\u305f\u30e9\u30a4\u30d6\u30e9\u30ea\u307f\u305f\u3044\u306b\u3057\u306a\u304d\u3083\u3044\u3051\u306a\u3044\u3057\u3001\u304b\u3068\u3044\u3063\u3066\u500b\u5225\u306b\u5bfe\u5fdc\u3059\u308b\u306e\u306f\u3001\u306a\u306b\u304b\u91c8\u7136\u3068\u3057\u306a\u3044\u3068\u3044\u3046\u304b\u3001\u305d\u3082\u305d\u3082\u30ea\u30b9\u30ca\u30fc\u304c\u3084\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u30c8\u30fc\u30c8\u30ed\u30b8\u30c3\u30af\u306a\u611f\u3058\u304c\u3059\u308b\u3044\u3046\u304b\u3001\u307e\u3041\u8981\u3059\u308b\u306b\u9762\u5012\u304f\u3055\u3044\u4e8b\u614b\u306b\u9665\u308b\u306e\u304c\u76ee\u306b\u898b\u3048\u308b\u3002<\/p>\n
 <\/p>\n
\u306a\u306b\u304b\u4ed6\u306e\u89e3\u6c7a\u7b56\u304c\u306a\u3044\u3082\u306e\u304b\u3002\u3002\u3002<\/p>\n
 <\/p>\n
\u3068\u8003\u3048\u308b\u3053\u3068\u3057\u3070\u3057\u3002<\/p>\n
AsyncTask\u306e\u6d3e\u751f\u30af\u30e9\u30b9\u3067\u306f\u3001\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u306e\u51e6\u7406\u3060\u3051\u306b\u96c6\u4e2d\u3057\u3001UI\u30b9\u30ec\u30c3\u30c9\u3092\u3044\u3058\u304f\u308b\u3068\u3053\u308d\u306f\u3001\u547c\u3073\u51fa\u3057\u5143\u306eUI\u5074\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308c\u3070\u3001\u3044\u3044\u611f\u3058\u306b\u306a\u308b\u306e\u3067\u306f\uff01\uff1f<\/p>\n
\u7d50\u5408\u5ea6\u3082\u4f4e\u304f\u306a\u308b\u3057\u3001\u51dd\u96c6\u5ea6\u306f\u9ad8\u304f\u306a\u308b\u3002<\/p>\n
\u306a\u306b\u3088\u308a\u30b7\u30f3\u30d7\u30eb\u3002<\/p>\n
\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u611f\u3058\u306b\u306a\u308b\u3060\u308d\u3046\u3002<\/p>\n
Activity<\/p>\n
public class HogeActivity extends Activity {\r\n    private EditText mEditText = null;\r\n    \r\n    @Override\r\n    protected void onCreate(Bundle savedInstanceState) {\r\n        super.onCreate(savedInstanceState);\r\n        setContentView(R.layout.hoge_activity);\r\n\r\n        mEditText = (EditText)findViewById(R.id.text1);\r\n        \r\n         ((Button)findViewById(R.id.button1)).setOnClickListener(new View.OnClickListener() {\r\n            @Override\r\n            public void onClick(View arg0) {\r\n                doHogeTask();\r\n            }\r\n        });\r\n    }\r\n    \r\n    private void doHogeTask() {\r\n\r\n        \/\/ UI\u30b9\u30ec\u30c3\u30c9\u306b\u95a2\u308f\u308b\u3068\u3053\u308d\u306fUI\u5074\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\r\n        HogeTask hogeTask = new HogeTask(){\r\n            @Override\r\n            protected void onPostExecute(String result) {\r\n                mEditText.setText(result);\r\n            }\r\n        \r\n        };\r\n\r\n        \/\/ \u975e\u540c\u671f\u51e6\u7406\u306e\u547c\u3073\u51fa\u3057\r\n        String[] params = null;\r\n        hogeTask.execute(params);\r\n    }\r\n}<\/pre>\n
AsyncTask<\/p>\n
\/\/ AsyncTask\u3067\u306f\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u51e6\u7406\u306b\u96c6\u4e2d\r\npublic class HogeTask extends AsyncTask {\r\n    @Override\r\n    protected String doInBackground(String ... parm) {\r\n        String result = null;\r\n        \r\n        \/\/ \u4f55\u3089\u304b\u306e\u51e6\u7406\u3092\u884c\u3044\u7d50\u679c\u3092\u8fd4\u3059\r\n        \r\n        return result;\r\n    }\r\n}<\/pre>\n
\u4e0a\u8a18\u4f8b\u3067\u306f\u3001onPostExecute()\u306b\u306e\u307f\u7740\u76ee\u3057\u305f\u304c\u3001UI\u30b9\u30ec\u30c3\u30c9\u3068\u3084\u308a\u3068\u308a\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u306f\u4e0a\u8a18\u65b9\u6cd5\u3067\u3044\u3051\u308b\u306e\u3067\u306f\u306a\u3044\u304b\u306a(\u307e\u3060\u3084\u3063\u3066\u306a\u3044\u3051\u3069)\u3002<\/p>\n
\u3053\u308c\u3067\u3001\u307b\u3068\u3093\u3069\u306e\u30b1\u30fc\u30b9\u3067\u306f\u4e8b\u8db3\u308a\u308b\u306e\u3067\u306f\u306a\u3044\u304b\uff1f<\/p>\n
\u672c\u5f53\u306b\u8fbc\u307f\u5165\u3063\u305f\u3053\u3068\u3092\u3057\u305f\u3044\u5834\u5408\u306b\u306f\u3001\u3082\u3061\u308d\u3093\u30ea\u30b9\u30ca\u30fc\u3092\u4f5c\u6210\u3059\u308c\u3070\u3088\u3044\u3068\u601d\u3046\u304c\u3002<\/p>\n
\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u3053\u308c\u304b\u3089\u975e\u540c\u671f\u51e6\u7406\u3092\u5b9f\u88c5\u3059\u308b\u306e\u304c\u3001\u81ea\u5206\u306e\u4e2d\u3067\u306f\u697d\u306b\u306a\u308b\u6c17\u304c\u3059\u308b\u3002<\/p>\n
\u3054\u53c2\u8003\u306b\u306a\u308c\u3070\u3002<\/p>\n
UI\u30b9\u30ec\u30c3\u30c9\u3046\u3093\u306c\u3093\u306e\u8a71\u306f\u3001<\/p>\n