一、 启动android默认浏览器

在Android程序中我们可以通过发送隐式Intent来启动系统默认的浏览器。如果手机本身安装了多个浏览器而又没有设置默认浏览器的话，系统将让用户选择使用哪个浏览器来打开连接。关于Intent的更多内容请参考《 常用Intent 》

示例1

        Intent intent = new Intent();intent.setAction("android.intent.action.VIEW");Uri content_url = Uri.parse("http://www.163.com");intent.setData(content_url);startActivity(intent);

         Intent intent = new Intent();        intent.setAction("android.intent.action.VIEW");    Uri content_url = Uri.parse("http://www.163.com");   intent.setData(content_url);           intent.setClassName("com.android.browser","com.android.browser.BrowserActivity");   startActivity(intent);

         Intent intent = new Intent();        intent.setAction("android.intent.action.VIEW");    Uri content_url = Uri.parse("file:///sdcard/robin.hu/help.html");   intent.setData(content_url);           intent.setClassName("com.android.browser","com.android.browser.BrowserActivity");   startActivity(intent);

虽然网上很多文章说即使使用 浏览器 打开本地的html文件的时 ，文件路径不支持"files:"，不应该使用

Uri.parse("file:///sdcard/robin.hu/help.html"); 

这种形式而是应该使用

Uri content_url = Uri.parse("content://com.android.htmlfileprovider/sdcard/robin.hu/help.html");

但是 经过在HTC G10(Android2.3.5),Lenovo P770(Android4.0以上)测试，实际上只 有

Uri.parse("file:///sdcard/robin.hu/help.html");

这种形式 能很好的工作。

Uri content_url = Uri.parse("content://com.android.htmlfileprovider/sdcard/robin.hu/help.html");

    static void startBrower(Context context,String uri){startBrower(context,Uri.parse(uri));}static void startBrower(Context context,Uri uri){Intent intent = new Intent();intent.setAction("android.intent.action.VIEW");/*其实可以不用添加该Category*/intent.addCategory("android.intent.category.BROWSABLE");intent.setData(uri); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);/*如果想用浏览器打开本地html文件的话，则只能通过显式intent启动浏览器*/boolean explicitMode=false;String scheme=uri.getScheme();if(scheme!=null&&scheme.startsWith("file")) {explicitMode=true;}if(explicitMode) {intent.setClassName("com.android.browser", "com.android.browser.BrowserActivity");} else {intent.addCategory("android.intent.category.BROWSABLE");}context.startActivity(intent);}static void startBrower(Context context,String uri,String packageName, String className){startBrower(context,Uri.parse(uri),packageName,className);}static void startBrower(Context context,Uri uri,String packageName, String className){Intent intent = new Intent();intent.setAction("android.intent.action.VIEW");intent.setData(uri); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);intent.setClassName(packageName,className);context.startActivity(intent);}

<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.android.browser"><original-package android:name="com.android.browser" /><permission android:name="com.android.browser.permission.PRELOAD"android:label="@string/permission_preload_label"android:protectionLevel="signatureOrSystem" /><uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/><uses-permission android:name="android.permission.ACCESS_DOWNLOAD_MANAGER"/><uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/><uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/><uses-permission android:name="android.permission.GET_ACCOUNTS"/><uses-permission android:name="android.permission.USE_CREDENTIALS"/><uses-permission android:name="android.permission.INTERNET" /><uses-permission android:name="android.permission.NFC" /><uses-permission android:name="android.permission.SEND_DOWNLOAD_COMPLETED_INTENTS" /><uses-permission android:name="android.permission.SET_WALLPAPER" /><uses-permission android:name="android.permission.WAKE_LOCK"/><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.WRITE_SETTINGS" /><uses-permission android:name="android.permission.READ_SYNC_SETTINGS" /><uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS" /><uses-permission android:name="android.permission.MANAGE_ACCOUNTS" /><uses-permission android:name="com.android.browser.permission.READ_HISTORY_BOOKMARKS"/><uses-permission android:name="com.android.browser.permission.WRITE_HISTORY_BOOKMARKS"/><uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT"/><application   android:name="Browser"android:label="@string/application_name"android:icon="@mipmap/ic_launcher_browser"android:backupAgent=".BrowserBackupAgent"android:hardwareAccelerated="true"android:taskAffinity="android.task.browser" ><provider android:name=".provider.BrowserProvider2"android:authorities="com.android.browser;browser"android:multiprocess="true"android:readPermission="com.android.browser.permission.READ_HISTORY_BOOKMARKS"android:writePermission="com.android.browser.permission.WRITE_HISTORY_BOOKMARKS"><path-permission android:path="/bookmarks/search_suggest_query"android:readPermission="android.permission.GLOBAL_SEARCH" /></provider><activity android:name="BrowserActivity"android:label="@string/application_name"android:launchMode="singleTask"android:alwaysRetainTaskState="true"android:configChanges="orientation|keyboardHidden|keyboard|screenSize"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" /></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" /><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-data android:name="android.app.searchable"android:resource="@xml/searchable" /></activity><activity android:name="ShortcutActivity"android:theme="@style/ShortcutTheme"android:label="@string/shortcut_bookmark"android:icon="@mipmap/ic_launcher_shortcut_browser_bookmark"><intent-filter><action android:name="android.intent.action.CREATE_SHORTCUT" /><category android:name="android.intent.category.DEFAULT" /></intent-filter></activity><activity android:name="BrowserPreferencesPage" android:label="@string/menu_preferences"><intent-filter><action android:name="android.intent.action.MANAGE_NETWORK_USAGE" /><category android:name="android.intent.category.DEFAULT" /></intent-filter></activity><activity android:name="BookmarkSearch"android:label="@string/bookmarks_search"android:stateNotNeeded="true"android:theme="@android:style/Theme.NoDisplay"android:excludeFromRecents="true"><intent-filter><action android:name="android.intent.action.SEARCH" /><category android:name="android.intent.category.DEFAULT" /></intent-filter><meta-data android:name="android.app.searchable"android:resource="@xml/bookmarks_searchable" /></activity><activity android:name="AddBookmarkPage" android:label="Save bookmark"android:theme="@style/DialogWhenLarge"android:configChanges="orientation|keyboardHidden|screenSize"><intent-filter><action android:name="android.intent.action.INSERT" /><category android:name="android.intent.category.DEFAULT" /><data android:mimeType="vnd.android.cursor.dir/bookmark"/></intent-filter></activity><activity android:name="ComboViewActivity"></activity><!-- Bookmark thumbnail homescreen widget --><receiverandroid:name=".widget.BookmarkThumbnailWidgetProvider"android:label="@string/bookmarks"><intent-filter><actionandroid:name="android.appwidget.action.APPWIDGET_UPDATE" /><actionandroid:name="com.android.browser.BOOKMARK_APPWIDGET_UPDATE" /></intent-filter><meta-dataandroid:name="android.appwidget.provider"android:resource="@xml/bookmarkthumbnailwidget_info" /></receiver><serviceandroid:name=".widget.BookmarkThumbnailWidgetService"android:permission="android.permission.BIND_REMOTEVIEWS"android:exported="false" /><receiverandroid:name=".widget.BookmarkWidgetProxy"android:exported="false" /><activity android:name=".widget.BookmarkWidgetConfigure"android:theme="@android:style/Theme.Holo.DialogWhenLarge"><intent-filter><action android:name="android.appwidget.action.APPWIDGET_CONFIGURE"/></intent-filter></activity><!-- Makes .BrowserActivity the search target for any activity in Browser --><meta-data android:name="android.app.default_searchable" android:value=".BrowserActivity" /><!-- Application code for RLZ tracking.  RLZ assigns non-unique, non-personally identifiabletracking labels to client products; these labels sometimes appear in Google searchqueries.  See http://code.google.com/p/rlz for more info.This value signifies to the RLZ client that this application uses RLZ tracking. --><meta-data android:name="com.google.android.partnersetup.RLZ_ACCESS_POINT"android:value="@string/rlz_access_point" /><receiver android:name=".OpenDownloadReceiver"><intent-filter><action android:name="android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED"/></intent-filter></receiver><!-- For custom home pages (like most visited) --><providerandroid:name=".homepages.HomeProvider"android:authorities="com.android.browser.home"android:readPermission="com.android.browser.permission.READ_HISTORY_BOOKMARKS"android:exported="false" /><receiver android:name=".AccountsChangedReceiver"><intent-filter><action android:name="android.accounts.LOGIN_ACCOUNTS_CHANGED" /></intent-filter></receiver><receiver android:name=".PreloadRequestReceiver"android:permission="com.android.browser.permission.PRELOAD" ><intent-filter><action android:name="android.intent.action.PRELOAD"/><data android:scheme="http" /></intent-filter></receiver><provider android:name=".provider.SnapshotProvider"android:authorities="com.android.browser.snapshots"android:exported="false" /></application>
</manifest>

转载自： http://blog.csdn.net/hudashi/article/details/8176298