Please see the Javadoc of the method setType(String type) in the class Intent: This method automatically clears any data that was previously set (for example. Uri uri = le(entry); Intent intent = new Intent( ACTION_VIEW); String mime = “*/*”; MimeTypeMap mimeTypeMap = MimeTypeMap. aAndType Method. (Usually optional) Set the data for the intent along with an explicit MIME data type.
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An intent is an abstract description of an intent.setadtaandtype to be performed. It can be used with startActivity to launch an ActivitybroadcastIntent to send it to any interested BroadcastReceiver components, and Context. An Intent provides a facility for performing late runtime binding between the code in different applications. Its most significant use is in the launching of activities, where it can be thought of as the glue between activities.
It is basically a passive data structure holding an abstract description of an action to be performed.
For information about how to create and resolve intents, read the Intents and Intent Filters developer guide. This example is a typical top-level entry into the Contacts application, showing you the list of people.
In addition to these primary attributes, there are a number of secondary attributes that you can also include with an intent:. Normally the type is inferred from the data itself.
By setting this attribute, you disable that evaluation and force an explicit type. If this attribute is set then none of the evaluation is performed, and this component is used exactly as is. By specifying this attribute, all of the other Intent attributes become optional. This can be used to provide extended information to the component.
For example, if we have a action intent.setdataandtpye send an e-mail message, we could also include extra pieces of data here to supply a subject, body, etc. Here are some examples of other operations you can specify as intents using these additional parameters:. This can be used, for example, in an intent.ssetdataandtype application to allow the user to pick some data to include as an attachment.
There are a variety of standard Androir action and category constants defined in the Intent class, but applications can also define their own. Intentsetdataandtype together, the set of actions, data types, categories, and extra data defines a language for the system allowing for the expression of phrases such as “call john smith’s cell”. As applications are added to the system, they can extend this language by adding new actions, types, and categories, or they can modify the behavior of existing phrases by supplying their own activities that handle them.
There are two primary forms of intents you will use. Often these will not include any other information, simply being a way for an application to launch various internal activities it has as the user interacts with the application.
Implicit Intents have not specified a component; instead, they must include enough information for the system to determine which of the available components is best to run for that intent. When using implicit intents, given such an arbitrary intent we need to know what to do with it.
Plus, in the case of broadcasts, any BroadcastReceiver objects explicitly registered with Context. More details on this can be found in the documentation on the IntentFilter class. There are three pieces of information in the Intent that are used for resolution: Using this information, a query is done on the PackageManager for a component that can handle the intent.
The appropriate component is determined based on the intent information supplied in the AndroidManifest.
The type is retrieved from the Intent’s data, if not already supplied in the Intent. Like the action, if a type is included in the intent either explicitly or implicitly in its datathen this must be listed by the component as one it handles. The categoriesif intent.setvataandtype, must all be listed by the activity as categories it handles. For example, consider the Note Pad sample application that allows a user to browse through a list of notes data and view details about individual items.
Text in italics indicates places where you would replace a name with one specific to your own package. The first activity, com.
NotesListserves as our main entry into the app. It can do three things as described by its three intent templates: This declares the things that the activity can do on a directory of notes. This filter describes the ability to return to the caller a note selected by the user without needing to know where it came from.
The data type vnd. Here, however, the caller specifies the type of data they desire instead of the type of data the user will be picking from. The second activity, com. NoteEditorshows the user a single note entry and allows them to edit it. It can do two things as described by its two intent templates: The secondary use of this activity is to insert a new note entry into an existing directory of notes.
This is used when the user creates a new note: If they keep their changes, the URI of the newly created note is returned to the caller. The last activity, com. TitleEditorallows the user to edit the title adnroid a note. This could be implemented as a class that the application directly invokes by explicitly setting its component in the Intentbut here we show a way you can publish alternative operations on existing data:.
In the single intent template here, we have created our own private action called com. It must be invoked on a specific note data type vnd. In addition to supporting the intent.ssetdataandtype category as usual, our title editor also supports two other standard categories: Implementing these categories allows others to find the special action it provides without directly knowing about it, through the PackageManager.
Note that in the intent template here was also supply an explicit name for the template via android: Given these capabilities, the following intent will resolve to the TitleEditor activity:. These are the current standard actions that Andrkid defines for launching activities usually through Context.
See setFlags int for a list of all possible flags. Wrapper class holding an Intent and implementing comparisons on it for the intent.setdataandtyps of filtering. This is a sticky broadcast containing the charging state, level, and other information about the battery.
The user pressed the “call” button to go to the dialer or other appropriate UI for placing a call. Display intent.setdataandtypw activity chooser, allowing the user to pick what they want to before proceeding. This is broadcast when a user action should request a temporary system dialog to dismiss. The current device Configuration orientation, locale, etc has changed. This constant was deprecated in API level O or above, this broadcast will no longer be delivered to any BroadcastReceiver defined in your manifest.
Instead, apps are strongly encouraged to use the improved Context. Resources for a set of packages which were previously unavailable are currently available since the media on which they exist is available.
Android Intents – Tutorial
Resources for a set of packages are currently unavailable since the media on which they exist is unavailable. Broadcast to a specific application to query any supported restrictions to impose on restricted users.
This is broadcast once, after the user has finished booting, but while still in the “locked” state. Broadcast sent to the primary user when an associated managed profile is added the profile was created and is ready to be used.
Broadcast sent to the primary user when the credential-encrypted private storage for an associated managed profile is unlocked. Androoid low memory condition notification acknowledged by user and package management should intent.setdataandtypee started. External media was removed from SD card slot, but mount point was not unmounted. External media is present, and being disk-checked The path to the mount point for the checking media is contained in the Intent.
External media is present, but is using an incompatible fs or is blank The path to the mount point for the checking media is contained in the Intent. An existing application package has been changed for example, a component has been enabled or disabled.
Open an image using URI in Android’s default gallery image viewer – Stack Overflow
Sent to the installer package of an application when that application is first launched that is the first time it is moved out of the stopped state. This constant has never been used. A new version of an application package has been installed, replacing an existing version that was previously installed. Create a new item in the given container, initializing it from the current contents of the clipboard. Some content providers have parts of their namespace where they publish new events or items that the user may be especially interested in.
Start the platform-defined tutorial Input: QUERY is the text to search for. Sent when a user switch is happening, causing the process’s user to be brought to the foreground.
Sent the first time a user is starting, to allow system apps to perform one time initialization. Sent when the user is present after device wakes up e. Sent when the credential-encrypted private storage has become unlocked for the target user. Modern applications should use WindowManager.
Set if the activity should be considered as an alternative action to the data the user is currently viewing. Set if the activity should be an option for the default action center press to perform on a piece of data. Indicates an activity optimized for Leanback mode, and that should be displayed in the Leanback launcher.
C# (CSharp) Method Android.Content Intent.SetDataAndType Code Examples
Set if the activity should be considered as an alternative selection action to the data the user has currently selected. Used to indicate that an intent filter can accept files which are not necessarily openable by ContentResolver.
Used as an int extra field in AlarmManager intents to tell the application being invoked how many pending alarms are being delievered with the intent. This constant was deprecated in API level 7. The ComponentName chosen by the user to complete an action. A ComponentName describing components that should be filtered out and omitted from a list of components presented to the user. Extra that can be included on activity intents coming from the storage UI when it launches sub-activities to manage various types of storage.