webview和内置浏览器的调用

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

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);

这样子，android就可以调用起手机默认的浏览器访问。

二、启动指定浏览器

在Android程序中我们可以通过发送显式Intent来启动指定的浏览器。

启动Android原生浏览器

示例2

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);

只要修改以intent.setClassName("com.android.browser","com.android.browser.BrowserActivity");

中相应的应用程序packagename 和要启动的activity即可启动其他浏览器来

uc浏览器"："com.uc.browser", "com.uc.browser.ActivityUpdate“

opera浏览器："com.opera.mini.android", "com.opera.mini.android.Browser"

qq浏览器："com.tencent.mtt", "com.tencent.mtt.MainActivity"

三、使用浏览器打开本地html文件

打开本地的html文件的时候，一定要指定某个浏览器，而不能采用方式一来浏览。

示例3

　　　　//如果是放到本程序的文件可以先复制到/data/data/程序报名/src下再解压到sdcard上

　　　　//不能用file://android_assert寻找文件路径，因为到了浏览器程序浏览器程序没有 android_assert路径下的文件

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");

这种形式反而不能很好的工作

四、对使用浏览器打开网页的封装

以下是对使用浏览器打开网页的一些封装

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);

}

五、Android原生浏览器的AndroidManifest.xml

以下是Android 4.0原生浏览器的AndroidManifest.xml文件

<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>

</intent-filter>

<!-- For these schemes were not particular MIME type has been

supplied, we are a good candidate. -->

<intent-filter>

</intent-filter>

<!-- For these schemes where any of these particular MIME types

have been supplied, we are a good candidate. -->

<intent-filter>

</intent-filter>

<intent-filter>

</intent-filter>

<intent-filter android:priority="-101">

</intent-filter>

<intent-filter>

</intent-filter>

<!-- The maps app is a much better experience, so it's not

worth having this at all... especially for a demo!

<intent-filter android:label="Map In Browser">

</intent-filter>

-->

<intent-filter>

</intent-filter>

<intent-filter>

</intent-filter>

<intent-filter>

</intent-filter>

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>

</intent-filter>

</activity>

<intent-filter>

</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>

</intent-filter>

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>

</intent-filter>

</activity>

</activity>

<receiver

android:name=".widget.BookmarkThumbnailWidgetProvider"

android:label="@string/bookmarks">

<intent-filter>

<action

android:name="android.appwidget.action.APPWIDGET_UPDATE" />

<action

android:name="com.android.browser.BOOKMARK_APPWIDGET_UPDATE" />

</intent-filter>

<meta-data

android:name="android.appwidget.provider"

android:resource="@xml/bookmarkthumbnailwidget_info" />

</receiver>

<service

android:name=".widget.BookmarkThumbnailWidgetService"

android:permission="android.permission.BIND_REMOTEVIEWS"

android:exported="false" />

<receiver

android:name=".widget.BookmarkWidgetProxy"

android:exported="false" />

<activity android:name=".widget.BookmarkWidgetConfigure"

android:theme="@android:style/Theme.Holo.DialogWhenLarge">

<intent-filter>

</intent-filter>

</activity>

<!-- Application code for RLZ tracking. RLZ assigns non-unique, non-personally identifiable

tracking labels to client products; these labels sometimes appear in Google search

queries. See http://code.google.com/p/rlz for more info.

This value signifies to the RLZ client that this application uses RLZ tracking. -->

android:value="@string/rlz_access_point" />

<intent-filter>

</intent-filter>

</receiver>

<provider

android:name=".homepages.HomeProvider"

android:authorities="com.android.browser.home"

android:readPermission="com.android.browser.permission.READ_HISTORY_BOOKMARKS"

android:exported="false" />

<intent-filter>

</intent-filter>

</receiver>

<receiver android:name=".PreloadRequestReceiver"

android:permission="com.android.browser.permission.PRELOAD" >

<intent-filter>

</intent-filter>

</receiver>

<provider android:name=".provider.SnapshotProvider"

android:authorities="com.android.browser.snapshots"

android:exported="false" />

</application>

</manifest>

结束

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webview和内置浏览器的调用

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