Intent学习总结

可以使用Intent做如下的几件事情:
     Broadcast a message
     Start a service
     Launch an antivity
     Display a web page or a list of contacts
     Dial a phone number or answer a phone call

 

参考代码：

Java类：

public class BasicViewActivity extends Activity{

   public void onCreate(Bundle savedInstanceState){

        super.onCreate(savedInstanceState);
        setContentView(R.layout.someview);
   }
}
public static invokeMyApplication(Activity parentActivity){

   String actionName = "com.example.intent.action.ShowBasicView";
   Intent intent = new Intent(actionName);
   parentActivity.startActivity(intent);
}

 

xml文件：

<activity android:name="BasicViewActivity"
          android;label="Basic View Tests">
<intent-filter>
    <action android:name="com.example.intent.action.ShowBasicView"/>
    <category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>

 

关于Intent的一些用法如下：

public class IntentsUtils{
    public static void invokeWebBrowser(Activity activity){
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setData(Uri.parse("http://www.google.com"));
        activity.startActivity(intent);
    }
    public static void invokeWebSearch(Activity activity){
        Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
        intent.setData(Uri.parse("http://www.google.com"));
        activity.startActivity(intent);
    }
    public static void dial(Activity activity){
        Intent intent = new Intent(Intent.ACTION_DIAL);
        activity.startActivity(intent);
    }
    public static void call(Activity activiy){
        Intent intent = new Intent(Intent.ACTION_CALL);
        intent.setData(Uri.parse("tel:555-555-5555"));
        activity.startActivity(intent);
    }
    public static void showMapAtLatLong(Activity activity){
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setData(Uri.parse("gen:0,0?z=4&q=business+near+city"));
        activity.startActivity(intent);
    }
    public void tryOneOfThese(Activity activity){
        IntentsUtils.call(activity);
    }