{"id":133,"date":"2024-06-19T21:10:08","date_gmt":"2024-06-19T13:10:08","guid":{"rendered":"https:\/\/www.swreader.com\/?p=133"},"modified":"2024-06-19T21:32:57","modified_gmt":"2024-06-19T13:32:57","slug":"%e5%9c%a8android%e4%b8%ad%e6%b7%bb%e5%8a%a0%e8%87%aa%e5%ae%9a%e4%b9%89service","status":"publish","type":"post","link":"https:\/\/www.swreader.com\/index.php\/2024\/06\/19\/%e5%9c%a8android%e4%b8%ad%e6%b7%bb%e5%8a%a0%e8%87%aa%e5%ae%9a%e4%b9%89service\/","title":{"rendered":"\u5728Android\u4e2d\u6dfb\u52a0\u81ea\u5b9a\u4e49Service"},"content":{"rendered":"<p>\u5728Android\u64cd\u4f5c\u7cfb\u7edf\u4e2d\uff0cSystem Service\u662f\u63d0\u4f9b\u8bf8\u5982\u7535\u6e90\u7ba1\u7406\u3001\u7a97\u53e3\u7ba1\u7406\u3001\u5305\u7ba1\u7406\u7b49\u7cfb\u7edf\u7ea7\u670d\u52a1\u7684\u6838\u5fc3\u7ec4\u4ef6\u3002\u521b\u5efa\u548c\u6ce8\u518c\u81ea\u5b9a\u4e49System Service\u53ef\u4ee5\u6269\u5c55Android\u7684\u529f\u80fd\uff0c\u5e76\u4e3a\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\u65b0\u7684\u7cfb\u7edf\u670d\u52a1\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u5728Android\u4e2d\u6dfb\u52a0\u81ea\u5b9a\u4e49System Service\u3002<\/p>\n<h2>\u524d\u7f6e\u6761\u4ef6<\/h2>\n<p>\u5728\u5f00\u59cb\u4e4b\u524d\uff0c\u8bf7\u786e\u4fdd\u60a8\u5177\u5907\u4ee5\u4e0b\u6761\u4ef6\uff1a<\/p>\n<ol>\n<li>\u57fa\u672c\u7684Android\u5f00\u53d1\u77e5\u8bc6\u3002<\/li>\n<li>\u719f\u6089Android\u6e90\u4ee3\u7801\u7684\u7f16\u8bd1\u548c\u8c03\u8bd5\u3002<\/li>\n<li>\u53ef\u4ee5\u8bbf\u95ee\u548c\u4fee\u6539Android\u6e90\u4ee3\u7801\u3002<\/li>\n<\/ol>\n<h2>Android System Service\u67b6\u6784<\/h2>\n<p>\u5728\u6df1\u5165\u4ee3\u7801\u4e4b\u524d\uff0c\u7406\u89e3Android System Service\u7684\u67b6\u6784\u975e\u5e38\u91cd\u8981\u3002Android System Service\u901a\u8fc7Binder IPC\u673a\u5236\u63d0\u4f9b\u670d\u52a1\u3002\u4e3b\u8981\u7ec4\u4ef6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>Service Manager<\/strong>\uff1a\u7ba1\u7406\u6240\u6709System Service\u3002<\/li>\n<li><strong>Service<\/strong>\uff1a\u63d0\u4f9b\u7279\u5b9a\u670d\u52a1\u7684\u5b9e\u73b0\u7c7b\u3002<\/li>\n<li><strong>Client<\/strong>\uff1a\u4f7f\u7528\u670d\u52a1\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n<\/ul>\n<p>\u6df1\u5165\u4e86\u89e3Android System Service\u67b6\u6784\uff0c\u8bf7\u53c2\u8003<a href=\"https:\/\/developer.android.com\/guide\/components\/bound-services\">Android\u5f00\u53d1\u6587\u6863<\/a>\u3002<\/p>\n<h2>\u6b65\u9aa4\u4e00\uff1a\u5b9a\u4e49\u60a8\u7684System Service<\/h2>\n<p>\u9996\u5148\uff0c\u5728Android\u6e90\u4ee3\u7801\u6811\u4e2d\u627e\u5230\u9002\u5f53\u7684\u76ee\u5f55\u4ee5\u653e\u7f6e\u60a8\u7684\u670d\u52a1\u3002\u901a\u5e38\uff0c\u81ea\u5b9a\u4e49\u670d\u52a1\u4f1a\u653e\u5728<code>frameworks\/base\/services\/<\/code>\u76ee\u5f55\u4e0b\u3002\u6211\u4eec\u5c06\u4ee5\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684HelloWorldService\u4e3a\u4f8b\u3002<\/p>\n<h3>1. \u521b\u5efaAIDL\u63a5\u53e3<\/h3>\n<p>\u4e3a\u4e86\u5141\u8bb8\u670d\u52a1\u901a\u8fc7Binder\u673a\u5236\u88ab\u5176\u4ed6\u7ec4\u4ef6\u8c03\u7528\uff0c\u9700\u8981\u5b9a\u4e49\u4e00\u4e2aAIDL\u63a5\u53e3\u3002\u5728<code>frameworks\/base\/core\/java\/android\/os<\/code>\u76ee\u5f55\u4e0b\u521b\u5efa\u4e00\u4e2a\u65b0\u7684AIDL\u6587\u4ef6<code>IHelloWorldService.aidl<\/code>\uff1a<\/p>\n<pre><code class=\"language-aidl\">package android.os;\n\ninterface IHelloWorldService {\n    String sayHello();\n}<\/code><\/pre>\n<p>AIDL\u6587\u4ef6\u5b9a\u4e49\u4e86\u670d\u52a1\u63a5\u53e3\uff0c\u5305\u62ec\u5c06\u5b9e\u73b0\u5e76\u63d0\u4f9b\u7ed9\u5ba2\u6237\u7aef\u7684<code>sayHello<\/code>\u65b9\u6cd5\u3002\u4e86\u89e3\u66f4\u591a\u5173\u4e8eAIDL\u7684\u4fe1\u606f\uff0c\u8bf7\u53c2\u8003<a href=\"https:\/\/developer.android.com\/guide\/components\/aidl\">AIDL\u6587\u6863<\/a>\u3002<\/p>\n<h3>2. \u521b\u5efa\u670d\u52a1\u5b9e\u73b0\u7c7b<\/h3>\n<p>\u5728<code>frameworks\/base\/services\/core\/java\/com\/android\/server<\/code>\u76ee\u5f55\u4e0b\u521b\u5efa\u4e00\u4e2a\u65b0\u7684Java\u7c7b\u6587\u4ef6\uff0c\u4f8b\u5982<code>HelloWorldService.java<\/code>\uff1a<\/p>\n<pre><code class=\"language-java\">package com.android.server;\n\nimport android.content.Context;\nimport android.os.IBinder;\nimport android.os.Binder;\nimport android.os.IHelloWorldService;\nimport android.util.Log;\n\npublic class HelloWorldService extends IHelloWorldService.Stub {\n    private static final String TAG = &quot;HelloWorldService&quot;;\n    private Context mContext;\n\n    public HelloWorldService(Context context) {\n        mContext = context;\n        Log.d(TAG, &quot;HelloWorldService created&quot;);\n    }\n\n    @Override\n    public String sayHello() {\n        Log.d(TAG, &quot;sayHello() called&quot;);\n        return &quot;Hello, World!&quot;;\n    }\n\n    @Override\n    public IBinder asBinder() {\n        return this;\n    }\n}<\/code><\/pre>\n<p>\u8fd9\u91cc\u5b9a\u4e49\u4e86\u4e00\u4e2a\u7b80\u5355\u7684<code>HelloWorldService<\/code>\uff0c\u5b83\u5b9e\u73b0\u4e86<code>IHelloWorldService<\/code>\u63a5\u53e3\uff0c\u5e76\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7b80\u5355\u7684<code>sayHello<\/code>\u65b9\u6cd5\u3002\u8be6\u7ec6\u4e86\u89e3\u7ed1\u5b9a\u670d\u52a1\u7684\u5b9e\u73b0\uff0c\u8bf7\u67e5\u9605<a href=\"https:\/\/developer.android.com\/guide\/components\/bound-services\">\u7ed1\u5b9a\u670d\u52a1\u6307\u5357<\/a>\u3002<\/p>\n<h3>3. \u4fee\u6539\u7cfb\u7edf\u670d\u52a1\u7ba1\u7406\u5668<\/h3>\n<p>\u63a5\u4e0b\u6765\uff0c\u5728\u7cfb\u7edf\u670d\u52a1\u7ba1\u7406\u5668\u4e2d\u6ce8\u518c\u65b0\u670d\u52a1\u3002\u6253\u5f00<code>frameworks\/base\/services\/java\/com\/android\/server\/SystemServer.java<\/code>\uff0c\u5728<code>startOtherServices<\/code>\u65b9\u6cd5\u4e2d\u6dfb\u52a0\u6ce8\u518c\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-java\">import com.android.server.HelloWorldService;\n\n\/\/ \u5728startOtherServices\u65b9\u6cd5\u4e2d\nprivate void startOtherServices() {\n    \/\/ ...\n    try {\n        \/\/ \u521d\u59cb\u5316\u5e76\u6ce8\u518cHelloWorldService\n        Slog.i(TAG, &quot;HelloWorldService&quot;);\n        ServiceManager.addService(&quot;helloworld&quot;, new HelloWorldService(mSystemContext));\n    } catch (Throwable e) {\n        Slog.e(TAG, &quot;Starting HelloWorldService failed&quot;, e);\n    }\n    \/\/ ...\n}<\/code><\/pre>\n<h3>4. \u6dfb\u52a0Service Manager\u4ee3\u7801<\/h3>\n<p>\u5728<code>frameworks\/base\/core\/java\/android\/os\/ServiceManager.java<\/code>\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5\uff0c\u4ee5\u4fbf\u5176\u4ed6\u7ec4\u4ef6\u83b7\u53d6\u670d\u52a1\uff1a<\/p>\n<pre><code class=\"language-java\">public static IHelloWorldService getHelloWorldService() {\n    return IHelloWorldService.Stub.asInterface(ServiceManager.getService(&quot;helloworld&quot;));\n}<\/code><\/pre>\n<h3>5. \u4fee\u6539\u7cfb\u7edf\u6743\u9650<\/h3>\n<p>\u786e\u4fdd\u60a8\u7684\u670d\u52a1\u6709\u9002\u5f53\u7684\u6743\u9650\u3002\u5728<code>frameworks\/base\/core\/res\/AndroidManifest.xml<\/code>\u4e2d\uff0c\u6dfb\u52a0\u670d\u52a1\u58f0\u660e\uff1a<\/p>\n<pre><code class=\"language-xml\">&lt;service android:name=&quot;com.android.server.HelloWorldService&quot; android:permission=&quot;android.permission.BIND_HELLO_WORLD_SERVICE&quot;&gt;\n    &lt;intent-filter&gt;\n        &lt;action android:name=&quot;com.android.server.HelloWorldService&quot; \/&gt;\n    &lt;\/intent-filter&gt;\n&lt;\/service&gt;<\/code><\/pre>\n<p>\u5e76\u6dfb\u52a0\u65b0\u7684\u6743\u9650\u58f0\u660e\uff1a<\/p>\n<pre><code class=\"language-xml\">&lt;permission android:name=&quot;android.permission.BIND_HELLO_WORLD_SERVICE&quot; android:protectionLevel=&quot;signature&quot; \/&gt;<\/code><\/pre>\n<h2>\u6b65\u9aa4\u4e8c\uff1a\u6784\u5efa\u548c\u9a8c\u8bc1<\/h2>\n<h3>1. \u7f16\u8bd1Android\u6e90\u7801<\/h3>\n<p>\u786e\u4fdd\u60a8\u7684\u6e90\u4ee3\u7801\u66f4\u6539\u6b63\u786e\u540e\uff0c\u91cd\u65b0\u7f16\u8bd1Android\u6e90\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-sh\">source build\/envsetup.sh\nlunch &lt;your_device&gt;-userdebug\nm -j8<\/code><\/pre>\n<p>\u5173\u4e8e\u6784\u5efaAndroid\u6e90\u4ee3\u7801\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605<a href=\"https:\/\/source.android.com\/setup\/build\">Android\u6e90\u4ee3\u7801\u6587\u6863<\/a>\u3002<\/p>\n<h3>2. \u9a8c\u8bc1\u670d\u52a1<\/h3>\n<p>\u6784\u5efa\u5b8c\u6210\u540e\uff0c\u5c06\u65b0\u7cfb\u7edf\u5237\u5165\u8bbe\u5907\u6216\u542f\u52a8\u6a21\u62df\u5668\u3002\u4f7f\u7528adb shell\u9a8c\u8bc1\u670d\u52a1\u662f\u5426\u5df2\u6210\u529f\u6ce8\u518c\u5e76\u8fd0\u884c\uff1a<\/p>\n<pre><code class=\"language-sh\">adb shell service list | grep helloworld<\/code><\/pre>\n<p>\u60a8\u5e94\u8be5\u80fd\u770b\u5230<code>helloworld<\/code>\u670d\u52a1\u5728\u5217\u8868\u4e2d\u3002\u6709\u5173\u4f7f\u7528adb\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605<a href=\"https:\/\/developer.android.com\/studio\/command-line\/adb\">ADB\u6587\u6863<\/a>\u3002<\/p>\n<h2>\u6b65\u9aa4\u4e09\uff1a\u4f7f\u7528\u81ea\u5b9a\u4e49\u670d\u52a1<\/h2>\n<p>\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7ServiceManager\u83b7\u53d6\u5e76\u4f7f\u7528\u81ea\u5b9a\u4e49\u670d\u52a1\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code class=\"language-java\">import android.os.ServiceManager;\nimport android.os.IHelloWorldService;\n\npublic class MainActivity extends AppCompatActivity {\n    @Override\n    protected void onCreate(Bundle savedInstanceState) {\n        super.onCreate(savedInstanceState);\n        setContentView(R.layout.activity_main);\n\n        IHelloWorldService helloWorldService = ServiceManager.getHelloWorldService();\n        if (helloWorldService != null) {\n            try {\n                String greeting = helloWorldService.sayHello();\n                Log.d(&quot;MyApp&quot;, &quot;\u4eceHelloWorldService\u83b7\u53d6\u7684\u95ee\u5019\u8bed: &quot; + greeting);\n            } catch (RemoteException e) {\n                e.printStackTrace();\n            }\n        }\n    }\n}<\/code><\/pre>\n<h3>\u5b8c\u6574\u7684\u793a\u4f8b\u5e94\u7528\u7a0b\u5e8f<\/h3>\n<p>\u60a8\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u7684Android\u5e94\u7528\u7a0b\u5e8f\u9879\u76ee\uff0c\u5e76\u5728MainActivity\u4e2d\u4f7f\u7528\u4e0a\u8ff0\u4ee3\u7801\u8c03\u7528\u60a8\u7684HelloWorldService\u3002\u786e\u4fdd\u5e94\u7528\u7a0b\u5e8f\u6709\u9002\u5f53\u7684\u6743\u9650\u58f0\u660e\uff1a<\/p>\n<pre><code class=\"language-xml\">&lt;uses-permission android:name=&quot;android.permission.BIND_HELLO_WORLD_SERVICE&quot; \/&gt;<\/code><\/pre>\n<h2>\u7ed3\u8bba<\/h2>\n<p>\u6dfb\u52a0\u81ea\u5b9a\u4e49System Service\u662f\u6269\u5c55Android\u7cfb\u7edf\u529f\u80fd\u7684\u5f3a\u5927\u65b9\u5f0f\u3002\u901a\u8fc7\u4e0a\u8ff0\u6b65\u9aa4\uff0c\u6211\u4eec\u5b9e\u73b0\u4e86\u4e00\u4e2a\u7b80\u5355\u7684HelloWorldService\uff0c\u5e76\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u5b83\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u60a8\u53ef\u80fd\u4f1a\u9047\u5230\u66f4\u590d\u6742\u7684\u95ee\u9898\uff0c\u5982\u6743\u9650\u7ba1\u7406\u548c\u8fdb\u7a0b\u95f4\u901a\u4fe1\uff0c\u9700\u8981\u6839\u636e\u5177\u4f53\u8981\u6c42\u8fdb\u884c\u5904\u7406\u3002<\/p>\n<p>\u5e0c\u671b\u672c\u6587\u5bf9\u60a8\u6709\u6240\u5e2e\u52a9\u3002\u5982\u679c\u6709\u4efb\u4f55\u95ee\u9898\uff0c\u8bf7\u968f\u65f6\u7559\u8a00\u3002<\/p>\n<hr \/>\n<p>\u672c\u6587\u63d0\u4f9b\u4e86\u4ece\u5b9a\u4e49\u670d\u52a1\u63a5\u53e3\u3001\u5b9e\u73b0\u670d\u52a1\u7c7b\u3001\u6ce8\u518c\u670d\u52a1\u3001\u6784\u5efa\u548c\u9a8c\u8bc1\u670d\u52a1\uff0c\u5230\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u670d\u52a1\u7684\u8be6\u7ec6\u6b65\u9aa4\u3002\u66f4\u591a\u8d44\u6e90\uff0c\u8bf7\u8bbf\u95ee\u63d0\u4f9b\u7684\u94fe\u63a5\u4ee5\u4e86\u89e3Android\u7684\u5b98\u65b9\u6587\u6863\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Android\u64cd\u4f5c\u7cfb\u7edf\u4e2d\uff0cSystem Service\u662f\u63d0\u4f9b\u8bf8\u5982\u7535\u6e90\u7ba1\u7406\u3001\u7a97\u53e3\u7ba1\u7406\u3001\u5305\u7ba1\u7406\u7b49\u7cfb\u7edf\u7ea7\u670d\u52a1\u7684\u6838\u5fc3\u7ec4\u4ef6\u3002\u521b\u5efa\u548c\u6ce8\u518c\u81ea\u5b9a\u4e49System Service\u53ef\u4ee5\u6269\u5c55Android\u7684\u529f\u80fd\uff0c\u5e76\u4e3a\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\u65b0\u7684\u7cfb\u7edf\u670d\u52a1\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u5728Android\u4e2d\u6dfb\u52a0\u81ea\u5b9a\u4e49System Service\u3002 \u524d\u7f6e\u6761\u4ef6 \u5728\u5f00\u59cb\u4e4b\u524d\uff0c\u8bf7\u786e\u4fdd\u60a8\u5177\u5907\u4ee5\u4e0b\u6761\u4ef6\uff1a \u57fa\u672c\u7684Android\u5f00\u53d1\u77e5\u8bc6\u3002 \u719f\u6089Android\u6e90\u4ee3\u7801\u7684\u7f16\u8bd1\u548c\u8c03\u8bd5\u3002 \u53ef\u4ee5\u8bbf\u95ee\u548c\u4fee\u6539Android\u6e90\u4ee3\u7801\u3002 Android System Service\u67b6\u6784 \u5728\u6df1\u5165\u4ee3\u7801\u4e4b\u524d\uff0c\u7406\u89e3Android System Service\u7684\u67b6\u6784\u975e\u5e38\u91cd\u8981\u3002Android System Service\u901a\u8fc7Binder IPC\u673a\u5236\u63d0\u4f9b\u670d\u52a1\u3002\u4e3b\u8981\u7ec4\u4ef6\u5305\u62ec\uff1a Service Manager\uff1a\u7ba1\u7406\u6240\u6709System Service\u3002 Service\uff1a\u63d0\u4f9b\u7279\u5b9a\u670d\u52a1\u7684\u5b9e\u73b0\u7c7b\u3002 Client\uff1a\u4f7f\u7528\u670d\u52a1\u7684\u5e94\u7528\u7a0b\u5e8f\u3002 \u6df1\u5165\u4e86\u89e3Android System Service\u67b6\u6784\uff0c\u8bf7\u53c2\u8003Android\u5f00\u53d1\u6587\u6863\u3002 \u6b65\u9aa4\u4e00\uff1a\u5b9a\u4e49\u60a8\u7684System Service \u9996\u5148\uff0c\u5728Android\u6e90\u4ee3\u7801\u6811\u4e2d\u627e\u5230\u9002\u5f53\u7684\u76ee\u5f55\u4ee5\u653e\u7f6e\u60a8\u7684\u670d\u52a1\u3002\u901a\u5e38\uff0c\u81ea\u5b9a\u4e49\u670d\u52a1\u4f1a\u653e\u5728frameworks\/base\/services\/\u76ee\u5f55\u4e0b\u3002\u6211\u4eec\u5c06\u4ee5\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684HelloWorldService\u4e3a\u4f8b\u3002 1. \u521b\u5efaAIDL\u63a5\u53e3 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android.os.Binder; import android.os.IHelloWorldService; import android.util.Log; public class HelloWorldService extends IHelloWorldService.Stub { private static final String TAG = &quot;HelloWorldService&quot;; private Context mContext; public HelloWorldService(Context context) { mContext = context; Log.d(TAG, &quot;HelloWorldService created&quot;); } @Override public String sayHello() { Log.d(TAG, &quot;sayHello() called&quot;); return &quot;Hello, World!&quot;; } @Override public IBinder asBinder() { return this; } } \u8fd9\u91cc\u5b9a\u4e49\u4e86\u4e00\u4e2a\u7b80\u5355\u7684HelloWorldService\uff0c\u5b83\u5b9e\u73b0\u4e86IHelloWorldService\u63a5\u53e3\uff0c\u5e76\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7b80\u5355\u7684sayHello\u65b9\u6cd5\u3002\u8be6\u7ec6\u4e86\u89e3\u7ed1\u5b9a\u670d\u52a1\u7684\u5b9e\u73b0\uff0c\u8bf7\u67e5\u9605\u7ed1\u5b9a\u670d\u52a1\u6307\u5357\u3002 3. \u4fee\u6539\u7cfb\u7edf\u670d\u52a1\u7ba1\u7406\u5668 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Service&#8230;<\/p>\n","protected":false},"author":1,"featured_media":134,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[3,98],"tags":[14,102,5,100],"class_list":["post-133","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-android","category-service","tag-android","tag-framework","tag-linux","tag-service"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u5728Android\u4e2d\u6dfb\u52a0\u81ea\u5b9a\u4e49Service - TianYa Blog<\/title>\n<meta name=\"description\" content=\"\u6211\u4eec\u8be6\u7ec6\u8bb2\u89e3\u4e86\u5982\u4f55\u5728 Android \u7cfb\u7edf\u4e2d\u6dfb\u52a0\u81ea\u5b9a\u4e49\u7684System 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