Android Learning Note (17)--Invoke built-in application with intent

Invoking built-in applications with intent

1. Create a new Android project and name it intents to add two 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 "/>

2. Add the following code to the Intentsactivity.java file:

public void Onclickwebbrowser (View v) {//Browser Intent Intent = new Intent (Android.content.intent.action_view,uri.parse (" http://url "), or//url input Baidu URL, csdn do not let directly write the URL ... startactivity (intent); public void Onclickmakecalls (View v) {//Call Intent Intent = new Intent (Android.content.intent.action_dial,uri.parse (" tel:+651234567 ")); StartActivity (intent);}

3, the operation of the program, the effect is as follows:

Click Web Browser:

Click Make Calls:

Summarize:

In Android, the intent is usually an out-of-the-box: action and data. The action describes what to do and the data specifies the affected object.

Some examples of actions: Action_view, action_dial, Action_pick;

Some examples of data: tel:+651234567, geo:37.827500,-122.481670, content://contacts.