Android Learning Notes (18)-Use intent filters and implementations to browse the Web (with source code)

Using Intent Filters

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1, create a intents project, add a new class to the project, named Mybrowseractivity, a new browser.xml under the Res/layout folder;

2. Add the following code to the Androidmanifest.xml file:

Add Permissions:

    <uses-permission android:name= "Android.permission.CALL_PHONE"/>    <uses-permission android:name= " Android.permission.INTERNET "/>

        <activity            android:name= ". Mybrowseractivity "            android:label=" @string/app_name ">            <intent-filter>                <action android: Name= "Android.intent.action.VIEW"/>                <action android:name= "Net.zenail.MyBrowser"/>                <category Android:name= "Android.intent.category.DEFAULT"/>                <data android:scheme= "http"/>            </ Intent-filter>        </activity>

Action: Activity; Category: Class; Data: Indicates the type of the obtained.

3. Add three buttons to the Main.xml file:

    <button        android:id= "@+id/btn_webbrowser"        android:layout_width= "fill_parent"        android:layout_ height= "Wrap_content"        android:onclick= "Onclickwebbrowser"        android:text= "Web Browser"/>    < Button        android:id= "@+id/btn_makecalls"        android:layout_width= "fill_parent"        android:layout_height= " Wrap_content "        android:onclick=" onclickmakecalls "        android:text=" make Calls "/>     <button        Android:id= "@+id/btn_launchmybrowser"        android:layout_width= "fill_parent"        android:layout_height= "wrap _content "        android:onclick=" Onclicklaunchmybrowser "        android:text=" Launch My Browser "/>

4, add three buttons corresponding to the three click Method in the Intentsactivity.java file:

public void Onclickwebbrowser (View v) {Intent Intent = new Intent (Android.content.intent.action_view,uri.parse ("http:/ /url "));//Enter Baidu URL here, csdn do not let add link ...//The advantage of using Createchooser ()://1, the title of the selection dialog that is displayed is changed, and there is no use by default for this action option//2, When there is no activity matching the program's intent object, the application does not crash//startactivity (Intent.createchooser (Intent, "Open URL using ...")); StartActivity ( Intent);} public void Onclickmakecalls (View v) {Intent Intent = new Intent (Android.content.intent.action_dial,uri.parse ("tel:+ 651234567 ")); StartActivity (intent);} public void Onclicklaunchmybrowser (View v) {Intent Intent = new Intent ("Net.zenail.MyBrowser"); Intent.setdata ( Uri.parse ("http://url"));//Enter Baidu website here, csdn do not let add link ... startactivity (intent);}

5. Add a WebView to the Browser.xml:

    <webview        android:id= "@+id/webview01"        android:layout_width= "wrap_content"        android:layout_height= "Wrap_content"/>

6, add the following code in the Mybrowseractivity.java file, to realize the function of browsing the Web page:

public class Mybrowseractivity extends Activity {@Overrideprotected void onCreate (Bundle savedinstancestate) {//TODO Aut O-generated method Stubsuper.oncreate (savedinstancestate); Setcontentview (R.layout.browser); Uri URL = getintent (). GetData (); WebView WebView = (WebView) Findviewbyid (r.id.webview01); Webview.setwebviewclient (new Callback ()); Webview.loadurl ( Url.tostring ());} Private class Callback extends Webviewclient {@Overridepublic Boolean shouldoverrideurlloading (WebView view, String URL) {//TODO auto-generated method Stubreturn false;}}}

7, run a bit, the effect is as follows:

Click a third button:

Click the first button:

To refine the intent filter, add the Createchooser () method to the Onclickwebbrowser () method in Intentsactivity.java:

StartActivity (Intent.createchooser (Intent, "Open URL using ..."));

The following effects are added:

Then you can select the application you want to select ~

Benefits of attaching and using Createchooser ():

1. Change the title of the display selection dialog, and there is no use by the default for this action option;

2. The application does not crash when there is no activity matching the intent object of the program.