Summary of common intent actions for Android
This article summarizes the intent action function commonly used in Android. Share with you for your reference, as follows:
The basic design concept of Android is to encourage the reduction of coupling between components. Therefore, Android provides intent. Intent provides a general message system, which allows the transmission of intent between your application and other applications to perform actions and generate events. As a link between activities, intent is not limited to simple data transmission. Through its own properties, it can easily complete many more complex operations. For example, directly calling the dial-up function, processing and receiving SMS, and so on can be completed by setting the intent property.
Intent mainly has the following four important attributes:
Action: the value of the action attribute is a string, which represents that a series of common actions have been defined in the system. Through the setaction () method or in the manifest file androidmanifest XML. The sample code identifying the activity as the beginning of a program (configured by androidmanifest. XML) is as follows:
Data: data is usually operation data defined in URI format. For example: Tel: / /. Set through the SetData () method. Category: the category property is used to specify the environment in which the current action is executed. Through the addcategory () method or in the manifest file androidmanifest XML. The default is category_ DEFAULT。 Extras: extras attribute is mainly used to transfer additional data required by the target component. Set through the putextras() method.
In this article, we mainly introduce the use of common actions. Action describes the string of the action name triggered by intent. For broadcastintent, action refers to the action broadcast. Theoretically, action can be any string, and action strings related to Android system applications are defined in the intent class in the form of static string constants. There are many kinds of actions, such as incoming and outgoing calls, teachers' acceptance of short messages in class, etc. here are some common actions related to the system:
1. Intent. ACTION_ MAIN
String: android. intent. action. Main identifies activity as the beginning of a program.
2. Intent. Action_ CALL
Stirng: android. intent. action. CALL
Call the specified phone number.
3. Intent. ACTION_ POWER_ CONNECTED;
Broadcast when external power is plugged in
4 Intent. ACTION_ POWER_ DISCONNECTED;
Broadcast when external power is disconnected
5.Intent. Action. DIAL
String: action. intent. action. DIAL
Call dial panel
6.Intent. Action. ALL_ APPS
String: andriod. intent. action. ALL_ APPS
List all apps.
7.Intent. ACTION_ ANSWER
Stirng:android. intent. action. ANSWER
Handle incoming calls.
8 . Intent. ACTION_ BUG_ REPORT
String: android. intent. action. BUG_ REPORT
Displays the dug report.
9. Intent. Action_ CALL_ BUTTON
String: android. action. intent. CALL_ BUTTON.
Equivalent to pressing the "dial" key.
10. Telephony. SMS_ RECEIVED
String: android. provider. Telephony. SMS_ RECEIVED
Action of receiving SMS
11. Intent. ACTION_ GET_ CONTENT
String: android. intent. action. GET_ CONTENT
Allows the user to select special types of data and return (special types of data: take a photo or record a sound)
12. Intent. ACTION_ BATTERY_ LOW;
String: android. intent. action. BATTERY_ LOW
Indicates that the battery is low
13. Intent. ACTION_ SEND
String: android. intent. action. Send
Action to send mail
14. Intent. ACTION_ CALL_ PRIVILEGED
String：android. intent. action. CALL_ PRIVILEGED
Call Skype's action
15. Intent. ACTION_ CLOSE_ SYstem_ DIALOGS
When the screen times out to lock the screen, the Android system will broadcast this action message when the user presses the power button, long press or short press (whether or not the dialog box jumps out) to lock the screen
The above is a summary of common actions. In fact, there are many actions. If you want to use those not listed above, just Google.
For more Android related content, readers who are interested can view the special topics of this site: activity operation skill summary of Android programming, Android resource operation skill summary, Android file operation skill summary, Android SQLite database operation skill summary, Android JSON format data operation skill summary, Android database operation skill summary Summary of SD card operation methods for Android programming development, introduction and advanced tutorial for Android development, summary of Android view skills and summary of Android control usage
I hope this article will help you in Android programming.