{"id":1553,"date":"2015-05-06T16:53:17","date_gmt":"2015-05-06T08:53:17","guid":{"rendered":"http:\/\/www.menglanglang.cn\/?p=1553"},"modified":"2015-12-22T18:44:40","modified_gmt":"2015-12-22T10:44:40","slug":"android%e4%b8%ad%e7%9a%84service","status":"publish","type":"post","link":"http:\/\/www.menglanglang.cn\/?p=1553","title":{"rendered":"Android\u4e2d\u7684Service"},"content":{"rendered":"

\u5728\u770b Mars \u7684\u6559\u5b66\u89c6\u9891\u300aAndroid\u5f00\u53d1\u89c6\u9891\u6559\u5b66\u300b\u4e2d\uff0c\u4ed6\u63d0\u5230 Service \u662f Android \u7cfb\u7edf\u4e2d\u4e00\u4e2a\u52e4\u52e4\u6073\u6073\u7684\u52b3\u6a21\uff0c\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u4ece\u4e0d\u9732\u9762\u4f46\u4e00\u76f4\u9ed8\u9ed8\u4e3a\u5176\u670d\u52a1\u3002<\/span><\/p>\n

\"Android\u4e2d\u7684Service\"<\/p>\n

\u9996\u5148\u8bf4\u8bf4\u4ec0\u4e48\u662f Service\u3002Android \u7cfb\u7edf\u4e2d\u7684 Service \u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u5e94\u7528\u7a0b\u5e8f\u7ec4\u4ef6\uff0c<\/span>\u6ca1\u6709\u56fe\u5f62\u5316\u754c\u9762\uff0c<\/span>\u901a\u5e38\u7528\u6765\u5904\u7406\u4e00\u4e9b\u8017\u65f6\u957f\u7684\u64cd\u4f5c\uff0c\u6bd4\u5982\u4e0a\u4f20\u4e0b\u8f7d\u7b49\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u5904\u7406\u4e00\u4e9b\u5728\u6d4f\u89c8\u754c\u9762\u4e4b\u5916\u7684\u4e8b\uff0c\u5982\u540e\u53f0\u97f3\u4e50\u64ad\u653e\u7b49\u3002<\/span><\/span><\/p>\n

\u5b98\u65b9\u6587\u6863\u4e2d\u7ed9\u51fa\u7684\u89e3\u91ca\u662f\uff1a<\/span><\/p>\n

A Service is an application component representing either an application's desire to perform a longer-running operation while not interacting with the user or to supply functionality for other applications to use.<\/strong><\/pre>\n
\u542f\u52a8 Service \u7684\u65b9\u5f0f\u6709\u4e24\u79cd\uff0cStarted \u548c\u00a0Bound\u3002<\/span><\/strong><\/span><\/p>\n
\"Android\u4e2dService\u7684\u751f\u547d\u5468\u671f\"<\/p>\n
Started \u65b9\u5f0f\u542f\u52a8 Service \u65f6\uff0c\u8c03\u7528\u8005\u548c\u670d\u52a1\u4e4b\u95f4\u6ca1\u6709\u8054\u7cfb\uff0c\u5373\u4f7f\u8c03\u7528\u8005\u9000\u51fa\u4e86\uff0c\u670d\u52a1\u4ecd\u7136\u8fdb\u884c\u3002<\/span><\/span><\/strong>\u7b80\u5355\u5b9e\u73b0\u4e00\u4e2a ExampleService\uff0c\u96c6\u6210 Android \u7cfb\u7edf\u7684 Service \u7c7b\u5373\u53ef\uff0c\u4f46\u9700\u8981\u91cd\u5199\u4e0b\u5217\u65b9\u6cd5\u3002<\/span><\/p>\n
\n
\n
Code<\/strong>\u00a0\u00a0\u00a0View<\/a>Print<\/a><\/div>\n<\/div>\n
    \n
  1. package<\/span>\u00a0com.sinaapp.langtuteng.android.test;<\/li>\n
  2. <\/li>\n
  3. import<\/span>\u00a0android.app.Service;<\/li>\n
  4. import<\/span>\u00a0android.content.Intent;<\/li>\n
  5. import<\/span>\u00a0android.os.IBinder;<\/li>\n
  6. import<\/span>\u00a0android.util.Log;<\/li>\n
  7. <\/li>\n
  8. public<\/span>\u00a0class<\/span>\u00a0ExampleService\u00a0extends<\/span>\u00a0Service\u00a0{<\/li>\n
  9. <\/li>\n
  10. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0static<\/span>\u00a0final<\/span>\u00a0String\u00a0TAG\u00a0=\u00a0\"ExampleService\"<\/span>;<\/li>\n
  11. <\/li>\n
  12. \u00a0\u00a0\u00a0\u00a0@Override<\/span><\/li>\n
  13. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0IBinder\u00a0onBind(Intent\u00a0arg0)\u00a0{<\/li>\n
  14. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0null<\/span>;<\/li>\n
  15. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
  16. <\/li>\n
  17. \u00a0\u00a0\u00a0\u00a0@Override<\/span><\/li>\n
  18. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0onCreate()\u00a0{<\/li>\n
  19. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Log.i(TAG,\u00a0\"ExampleService--->onCreate\"<\/span>);<\/li>\n
  20. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0super<\/span>.onCreate();<\/li>\n
  21. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
  22. <\/li>\n
  23. \u00a0\u00a0\u00a0\u00a0@Override<\/span><\/li>\n
  24. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0onDestroy()\u00a0{<\/li>\n
  25. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Log.i(TAG,\u00a0\"ExampleService--->onDestroy\"<\/span>);<\/li>\n
  26. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0super<\/span>.onDestroy();<\/li>\n
  27. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
  28. <\/li>\n
  29. \u00a0\u00a0\u00a0\u00a0@Override<\/span><\/li>\n
  30. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0int<\/span>\u00a0onStartCommand(Intent\u00a0intent,\u00a0int<\/span>\u00a0flags,\u00a0int<\/span>\u00a0startId)\u00a0{<\/li>\n
  31. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Log.i(TAG,\u00a0\"ExampleService--->onStartCommand\"<\/span>);<\/li>\n
  32. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0START_NOT_STICKY;<\/li>\n
  33. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
  34. <\/li>\n
  35. }<\/li>\n<\/ol>\n<\/div>\n
    \u5f53\u7b2c\u4e00\u6b21\u8fd0\u884c\u7a0b\u5e8f\uff0c\u5e76\u901a\u8fc7\u00a0startService() \u542f\u52a8\u670d\u52a1\u65f6\uff0cExampleService \u7c7b\u4f1a\u4f9d\u6b21\u8c03\u7528\u00a0onCreate() --> onStartCommand()\uff0c\u70b9\u51fb\u8fd4\u56de\u9000\u51fa\u7a0b\u5e8f\uff0c\u4e0d\u4f1a\u8c03\u7528\u00a0onDestroy()\u3002\u6ce8\u610f\uff0c\u8fd9\u91cc\u5728 onCreate() \u4e4b\u540e\u4e0d\u4f1a\u8c03\u7528\u00a0<\/span>onStart() \u65b9\u6cd5\uff0c\u662f\u56e0\u4e3a\u8be5\u65b9\u6cd5\u5728 API 5 \u4e4b\u540e\u5df2\u5e9f\u5f03\u4e86\u3002<\/span><\/span><\/p>\n
    \u5f53\u518d\u6b21\u8fd0\u884c\u7a0b\u5e8f\u65f6\uff0c\u53ea\u6267\u884c\u00a0onStartCommand() \u65b9\u6cd5\u3002\u56e0\u4e3a\u9000\u51fa\u7a0b\u5e8f\uff0c\u540e\u53f0\u7684\u670d\u52a1\u5e76\u4e0d\u505c\u6b62\uff0c\u4e00\u76f4\u5b58\u5728\u5e76\u8fd0\u884c\u7740\uff0c\u5c31\u4e0d\u9700\u8981\u518d\u6b21 create\uff0c\u9664\u975e\u5728\u9000\u51fa\u7a0b\u5e8f\u65f6\u8c03\u7528\u8fc7\u00a0stopService()\uff0cExampleService\u00a0\u7c7b\u5219\u4f1a\u8c03\u7528\u00a0onDestroy()\u3002\u6240\u4ee5\u8bf4\u8981\u60f3\u505c\u6b62\u670d\u52a1\uff0c\u5fc5\u987b\u00a0stopService \u624d\u884c\u3002<\/span><\/p>\n
    Bound \u65b9\u5f0f\u542f\u52a8 Service \u65f6\uff0c<\/strong>\u8c03\u7528\u8005\u548c\u670d\u52a1\u7ed1\u5728\u4e00\u8d77\uff0c\u8c03\u7528\u8005\u4e00\u65e6\u9000\u51fa\u670d\u52a1\u4e5f\u5c31\u7ec8\u6b62\u4e86\u3002<\/strong>\u5b9e\u73b0\u4e00\u4e2a\u00a0BinderService \u7ee7\u627f Service \u5373\u53ef\uff0c\u4f46\u9700\u8981\u91cd\u5199\u4e0b\u5217\u65b9\u6cd5\u3002<\/span><\/span><\/p>\n
    \n
    \n
    Code<\/strong>\u00a0\u00a0\u00a0View<\/a>Print<\/a><\/div>\n<\/div>\n
      \n
    1. package<\/span>\u00a0com.sinaapp.langtuteng.android.test;<\/li>\n
    2. <\/li>\n
    3. import<\/span>\u00a0android.app.Service;<\/li>\n
    4. import<\/span>\u00a0android.content.Intent;<\/li>\n
    5. import<\/span>\u00a0android.os.Binder;<\/li>\n
    6. import<\/span>\u00a0android.os.IBinder;<\/li>\n
    7. import<\/span>\u00a0android.util.Log;<\/li>\n
    8. <\/li>\n
    9. public<\/span>\u00a0class<\/span>\u00a0BinderService\u00a0extends<\/span>\u00a0Service\u00a0{<\/li>\n
    10. <\/li>\n
    11. \u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0static<\/span>\u00a0final<\/span>\u00a0String\u00a0TAG\u00a0=\u00a0\"BinderService\"<\/span>;<\/li>\n
    12. \u00a0\u00a0\u00a0\u00a0private<\/span>\u00a0MyBinder\u00a0binder\u00a0=\u00a0new<\/span>\u00a0MyBinder();<\/li>\n
    13. <\/li>\n
    14. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0class<\/span>\u00a0MyBinder\u00a0extends<\/span>\u00a0Binder\u00a0{<\/li>\n
    15. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0BinderService\u00a0getService()\u00a0{<\/li>\n
    16. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0BinderService.this<\/span>;<\/li>\n
    17. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/li>\n
    18. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
    19. <\/li>\n
    20. \u00a0\u00a0\u00a0\u00a0@Override<\/span><\/li>\n
    21. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0IBinder\u00a0onBind(Intent\u00a0intent)\u00a0{<\/li>\n
    22. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Log.i(TAG,\u00a0\"BinderService--->onBind\"<\/span>);<\/li>\n
    23. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0binder;<\/li>\n
    24. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
    25. <\/li>\n
    26. \u00a0\u00a0\u00a0\u00a0@Override<\/span><\/li>\n
    27. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0onCreate()\u00a0{<\/li>\n
    28. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Log.i(TAG,\u00a0\"BinderService--->onCreate\"<\/span>);<\/li>\n
    29. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0super<\/span>.onCreate();<\/li>\n
    30. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
    31. <\/li>\n
    32. \u00a0\u00a0\u00a0\u00a0@Override<\/span><\/li>\n
    33. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0onDestroy()\u00a0{<\/li>\n
    34. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Log.i(TAG,\u00a0\"BinderService--->onDestroy\"<\/span>);<\/li>\n
    35. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0super<\/span>.onDestroy();<\/li>\n
    36. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
    37. <\/li>\n
    38. \u00a0\u00a0\u00a0\u00a0@Override<\/span><\/li>\n
    39. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0boolean<\/span>\u00a0onUnbind(Intent\u00a0intent)\u00a0{<\/li>\n
    40. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Log.i(TAG,\u00a0\"BinderService--->onUnbind\"<\/span>);<\/li>\n
    41. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span>\u00a0super<\/span>.onUnbind(intent);<\/li>\n
    42. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
    43. <\/li>\n
    44. \u00a0\u00a0\u00a0\u00a0public<\/span>\u00a0void<\/span>\u00a0MyMethod()\u00a0{<\/li>\n
    45. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Log.i(TAG,\u00a0\"BinderService--->MyMethod\"<\/span>);<\/li>\n
    46. \u00a0\u00a0\u00a0\u00a0}<\/li>\n
    47. <\/li>\n
    48. }<\/li>\n<\/ol>\n<\/div>\n
      \u5f53\u7b2c\u4e00\u6b21\u8fd0\u884c\u7a0b\u5e8f\uff0c\u5e76\u901a\u8fc7 bindService() \u542f\u52a8\u670d\u52a1\u65f6\uff0cBinderService \u7c7b\u4f1a\u4f9d\u6b21\u8c03\u7528\u00a0onCreate() -->onBind()\uff0c\u70b9\u51fb\u8fd4\u56de\u9000\u51fa\u7a0b\u5e8f\uff0c\u5219\u4f1a\u8c03\u7528\u00a0<\/span>onUnbind() -->onDestory()\u3002<\/span><\/span><\/p>\n
      \u5f53\u518d\u6b21\u8fd0\u884c\u7a0b\u5e8f\u65f6\uff0c\u8fd8\u662f\u548c\u7b2c\u4e00\u6b21\u4e00\u6837\uff0c\u9700\u8981\u91cd\u65b0 create \u8fd9\u4e2a\u670d\u52a1\u3002\u4e5f\u53ef\u4ee5\u4e0d\u6309\u8fd4\u56de\u952e\u9000\u51fa\u7a0b\u5e8f\uff0c\u624b\u52a8\u8c03\u7528\u00a0unbindService() \u6765\u505c\u6b62\u670d\u52a1\u3002<\/span><\/p>\n
      \u00a0\u4f46\u662f\uff0c\u4ee5\u4e0a\u4e24\u79cd\u65b9\u5f0f\u4e2d\uff0c\u5f53\u5904\u7406\u4e00\u4e9b\u8017\u65f6\u7279\u522b\u957f\u7684\u5de5\u4f5c\u65f6\uff0c\u9700\u8981\u5728\u5b9e\u73b0\u7684 Service \u7c7b\u65b0\u542f\u7ebf\u7a0b\u5904\u7406\u8017\u65f6\u64cd\u4f5c\uff0c\u4f46\u662f\u4ee3\u7801\u91cf\u5927\uff0c\u8d39\u4e8b\u513f\u3002\u53ef\u4ee5\u6709\u4e00\u79cd\u7b80\u4fbf\u7684\u65b9\u6cd5\uff0c\u90a3\u5c31\u662f\u7ee7\u627f IntentService \u7c7b\uff0c\u5b9e\u73b0\u00a0onHandleIntent() \u65b9\u6cd5\u5373\u53ef\uff0c\u7279\u522b\u7b80\u4fbf\u3002<\/span><\/p>\n
      \u5728\u00a0IntentService \u7c7b\u4e2d\uff0c\u4e3b\u8981\u6709\u4ee5\u4e0b\u5904\u7406\uff1a<\/pre>\n
        \n
      1. \n
        \u521b\u5efa\u4e00\u4e2a\u4e0e\u5e94\u7528\u7a0b\u5e8f\u4e3b\u7ebf\u7a0b\u5206\u5f00 worker thread \u7528\u6765\u5904\u7406\u6240\u6709\u901a\u8fc7\u4f20\u9012\u8fc7\u6765\u7684Intent\u8bf7\u6c42\u3002<\/span><\/pre>\n<\/li>\n
      2. \n
        \u521b\u5efa\u4e00\u4e2a work queue\uff0c\u4e00\u6b21\u53ea\u4f20\u9012\u4e00\u4e2a intent \u5230 onHandleIntent() \u65b9\u6cd5\u4e2d\uff0c\u4ece\u800c\u4e0d\u7528\u62c5\u5fc3\u591a\u7ebf\u7a0b\u5e26\u6765\u7684\u95ee\u9898\u3002<\/span><\/pre>\n<\/li>\n
      3. \n
        \u5f53\u5904\u7406\u5b8c\u6240\u6709\u8bf7\u6c42\u540e\u81ea\u52a8\u505c\u6b62\u670d\u52a1\uff0c\u800c\u4e0d\u9700\u8981\u6211\u4eec\u81ea\u5df1\u8c03\u7528 stopSelf() \u65b9\u6cd5\u3002<\/span><\/pre>\n<\/li>\n
      4. \n
        \u9ed8\u8ba4\u5b9e\u73b0\u4e86 onBind() \u65b9\u6cd5\uff0c\u8fd4\u56de\u503c\u4e3a null\u3002<\/span><\/pre>\n<\/li>\n
      5. \n
        \u9ed8\u8ba4\u5b9e\u73b0\u4e86 onStartCommand() \u65b9\u6cd5\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u5c06\u4f1a\u628a\u6211\u4eec\u7684 intent \u653e\u5230 work queue \u4e2d\uff0c\u7136\u540e\u5728 onHandleIntent() \u4e2d\u6267\u884c\u3002<\/span><\/pre>\n<\/li>\n<\/ol>\n
        \u6240\u6709\u5173\u4e8e Service \u7684\u6d4b\u8bd5\u65b9\u6cd5\u90fd\u5df2\u6253\u5305\uff0c\u4f9b\u514d\u8d39\u4e0b\u8f7d\uff0c\u5177\u4f53\u7ec6\u8282\u53ef\u4ee5\u4e0b\u8f7d\u4ee3\u7801\u8fd0\u884c\u540e\u6d4b\u8bd5\u5373\u53ef\u3002<\/span><\/p>\n
        \u4ee3\u7801\u4e0b\u8f7d\uff1a\u767e\u5ea6\u4e91\u5171\u4eab\u4e0b\u8f7d<\/a> | 360\u4e91\u76d8\u4e0b\u8f7d<\/a>\uff08\u63d0\u53d6\u7801\uff1ac5b5\uff09<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"
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