電信A庫要求android系統中有多個Browser時，開機自動設置一個默認瀏覽器，而不用彈出選擇框讓用戶手動選擇。

　　監聽開機廣播Intent.ACTION_BOOT_COMPLETED,?用PackageManager調用addPreferredActivity來設置默認Browser。因為要有系統權限才能設置成功，所以在Package/apps/Settings模塊中添加代碼實現。（系統通過校驗發起調用PackageManager.addPreferredActivity程序的Uid來判斷是否有權限）

1 public class BootCompletedReceiver extends BroadcastReceiver { 2 3 private final static String PKG_NAME = "com.android.browser"; 4 private final static String CLASS_NAME = "com.android.browser.BrowserActivity"; 5 6 private final static String[] SCHEME = new String[] { "http", "https", "about", "javascript", }; 7 8 @Override 9 public void onReceive(Context c, Intent paramIntent) { 10 try { 11 Log.d("antoon", paramIntent.getAction()); 12 setDefaultBrowser(c); 13 } catch (Exception e) { 14 e.printStackTrace(); 15 } 16 } 17 18 private void setDefaultBrowser(Context c) { 19 20 long start = System.currentTimeMillis(); 21 22 Intent intent = new Intent(Intent.ACTION_VIEW); 23 intent.setData(Uri.parse("http://"));//這里如果配置 “file://” pm.queryIntentActivities得到的list為空，不知為何 24 25 final int flags = PackageManager.MATCH_DEFAULT_ONLY | PackageManager.GET_RESOLVED_FILTER; 26 27 PackageManager pm = c.getPackageManager(); 28 List<ResolveInfo> list = pm.queryIntentActivities(intent, flags); 29 30 final int N = list == null ? 0 : list.size(); 31 if (N == 0) 32 return; 33 34 int bestmatch = 0; 35 int uid = -1; 36 ComponentName matchComponentName = null; 37 ComponentName[] set = new ComponentName[N]; 38 39 ComponentName defaultComponentName = new ComponentName(PKG_NAME, CLASS_NAME); 40 for (int i = 0; i < N; i++) { 41 ResolveInfo r = list.get(i); 42 ComponentName cp = new ComponentName(r.activityInfo.packageName, r.activityInfo.name); 43 set[i] = cp; 44 if (cp.equals(defaultComponentName)) { 45 bestmatch = r.match; 46 matchComponentName = cp; 47 uid = r.activityInfo.applicationInfo.uid; 48 } 49 Log.d("antoon", i + " -- " + cp); 50 } 51 52 if (matchComponentName == null) { 53 Log.d("antoon", "matchComponentName is null"); 54 matchComponentName = set[0]; 55 bestmatch = list.get(0).match; 56 } 57 58 Log.d("antoon", "bestmatch = " + bestmatch + " matchComponentName = " 59 + matchComponentName); 60 61 // List<IntentFilter> filterList = filterList(); 62 //for (IntentFilter filter : filterList) { 63 // pm.addPreferredActivity(filter, bestmatch, set, matchComponentName);//用下面的方法也可以，系統權限的校驗就是根據CallingUserId來判斷 64 // pm.addPreferredActivity(filter, bestmatch, set, matchComponentName, android.os.UserHandle.getCallingUserId()); 65 //}
　　　　　　 pm.addPreferredActivity(getFilterViewHttp(), bestmatch, set, matchComponentName, android.os.UserHandle.getCallingUserId()); 66 Log.d("antoon", "used time :" + (System.currentTimeMillis() - start)+"ms"); 67 } 68 69
　　　　　　/*沒必要針對每個scheme創建filter,在一個filter中加入所有scheme就可以，與Browser中AndroidManifest.xml中的配置對應。
　　　　　　public List<IntentFilter> filterList() { 70 　　ArrayList<IntentFilter> list = new ArrayList<IntentFilter>(); 71 　　for (String sche : SCHEME) { 72 　　IntentFilter filter = new IntentFilter(); 73 　　filter.addAction(Intent.ACTION_VIEW); 74 　　filter.addCategory(Intent.CATEGORY_BROWSABLE); 75 　　filter.addCategory(Intent.CATEGORY_DEFAULT); 76 　　filter.addDataScheme(sche); 77 　　list.add(filter); 78 　　} 79 　　return list; 80 　　}
　　　　　　*/
　　　　 　　　　public IntentFilter getFilterViewHttp() {IntentFilter filter = new IntentFilter();filter.addAction(Intent.ACTION_VIEW);filter.addCategory(Intent.CATEGORY_BROWSABLE);filter.addCategory(Intent.CATEGORY_DEFAULT);filter.addDataScheme("http"); return filter;} 81 82 } 　　　　<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" /><receiver android:name=".BootCompletedReceiver"><intent-filter><action android:name="android.intent.action.BOOT_COMPLETED" /></intent-filter></receiver>

看看系統Browser的配置

　　　　<activityandroid:name="BrowserActivity"android:alwaysRetainTaskState="true"android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale"android:label="@string/application_name"android:launchMode="singleTask"android:theme="@style/BrowserTheme"android:windowSoftInputMode="adjustResize" ><intent-filter><action android:name="android.speech.action.VOICE_SEARCH_RESULTS" /><category android:name="android.intent.category.DEFAULT" /></intent-filter><!--For these schemes were not particular MIME type has beensupplied, we are a good candidate.--><intent-filter><action android:name="android.intent.action.VIEW" /><category android:name="android.intent.category.DEFAULT" /><category android:name="android.intent.category.BROWSABLE" /><data android:scheme="http" /><data android:scheme="https" /><data android:scheme="about" /><data android:scheme="javascript" /></intent-filter><!--For these schemes where any of these particular MIME typeshave been supplied, we are a good candidate.--><intent-filter><action android:name="android.intent.action.VIEW" /><category android:name="android.intent.category.BROWSABLE" /><category android:name="android.intent.category.DEFAULT" /><data android:scheme="http" /><data android:scheme="https" /><data android:scheme="inline" /><data android:mimeType="text/html" /><data android:mimeType="text/plain" /><data android:mimeType="application/xhtml+xml" /><data android:mimeType="application/vnd.wap.xhtml+xml" /></intent-filter><!-- For viewing saved web archives. --><intent-filter><action android:name="android.intent.action.VIEW" /><category android:name="android.intent.category.BROWSABLE" /><category android:name="android.intent.category.DEFAULT" /><data android:scheme="http" /><data android:scheme="https" /><data android:scheme="file" /><data android:mimeType="application/x-webarchive-xml" /></intent-filter><!-- Accept inbound NFC URLs at a low priority --><intent-filter android:priority="-101" ><action android:name="android.nfc.action.NDEF_DISCOVERED" /><category android:name="android.intent.category.DEFAULT" /><data android:scheme="http" /><data android:scheme="https" /></intent-filter><!-- We are also the main entry point of the browser. --><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.DEFAULT" /><category android:name="android.intent.category.LAUNCHER" /><category android:name="android.intent.category.BROWSABLE" /><category android:name="android.intent.category.APP_BROWSER" /></intent-filter><!--The maps app is a much better experience, so it's notworth having this at all... especially for a demo!<intent-filter android:label="Map In Browser"><action android:name="android.intent.action.VIEW" /><category android:name="android.intent.category.DEFAULT" /><data android:mimeType="vnd.android.cursor.item/postal-address" /></intent-filter>--><intent-filter><action android:name="android.intent.action.WEB_SEARCH" /><category android:name="android.intent.category.DEFAULT" /></intent-filter><intent-filter><action android:name="android.intent.action.WEB_SEARCH" /><category android:name="android.intent.category.DEFAULT" /><category android:name="android.intent.category.BROWSABLE" /><data android:scheme="" /><data android:scheme="http" /><data android:scheme="https" /></intent-filter><intent-filter><action android:name="android.intent.action.MEDIA_SEARCH" /><category android:name="android.intent.category.DEFAULT" /></intent-filter><intent-filter><action android:name="android.intent.action.SEARCH" /><category android:name="android.intent.category.DEFAULT" /></intent-filter><meta-dataandroid:name="android.app.searchable"android:resource="@xml/searchable" /></activity>

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參考：http://www.apkbus.com/forum.php?mod=viewthread&tid=225694&page=1#pid3159981

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轉載于:https://www.cnblogs.com/antoon/p/4430032.html

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