An Intent is a messaging object you can use to request an action from another app component. Although intents facilitate communication between components in several ways, there are three fundamental use cases:. An Activity represents a single screen in an app. You can start a new instance of an Activity by passing an Intent to startActivity. The Intent describes the activity to start and carries any necessary data.
If you want to receive a result from the activity when it finishes, call startActivityForResult.
Your activity receives the result as a separate Intent object in your activity's onActivityResult callback. For more information, see the Activities guide. A Service is a component that performs operations in the background without a user interface. With Android 5. For versions earlier than Android 5. You can start a service to perform a one-time operation such as downloading a file by passing an Intent to startService.
The Intent describes the service to start and carries any necessary data.
If the service is designed with a client-server interface, you can bind to the service from another component by passing an Intent to bindService. For more information, see the Services guide. A broadcast is a message that any app can receive. The system delivers various broadcasts for system events, such as when the system boots up or the device starts charging.
You can deliver a broadcast to other apps by passing an Intent to sendBroadcast or sendOrderedBroadcast. The rest of this page explains how intents work and how to use them. Figure 1 shows how an intent is used when starting an activity. When the Intent object names a specific activity component explicitly, the system immediately starts that component. Figure 1. How an implicit intent is delivered through the system to start another activity:  Activity A creates an Intent with an action description and passes it to startActivity.From what I understand it is the process that filters apps that don't work for your phone.
However, I've ran carat and it says I need to restart or kill it to obtain 5 hours of battery life. Can I disable it or what can I do? I am running stock rom, not rooted, completely stock. Thanks so much! Don't know if you're still having this issue a month later. Based on what you read, you can just disable it. You don't need a filter installer or a method of filter apps for your device. When you attempt to install apps for your device, the play store will let you know before installing that the app is compatible with your device.
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Please wait Hi guys, are you sure that is the case? That the market app will check? Durant the Filter Installer then kick in??? Subscribe to Thread. Posting Quick Reply - Please Wait.In android, we can configure Content Providers to allow other applications securely access and modify our app data based on our requirements. Generally, the Content Provider is a part of an android application and it will act like more like a relational database to store the app data.
We can perform multiple operations like insert, update, delete and edit on the data stored in content provider using insertupdatedelete and query methods.Android Tutorial 2019 - Introduction to Content Provider in Android Example Part - 1
In android, we can use content provider whenever we want to share our app data with other apps and it allow us to make a modifications to our application data without effecting other applications which depends on our app. In android, the content provider is having different ways to store app data.
The app data can be stored in a SQLite database or in files or even over a network based on our requirements. By using content providers we can manage data such as audio, video, images and personal contact information. We have different type of access permissions available in content provider to share the data. We can set a restrict access permissions in content provider to restrict data access limited to only our application and we can configure different permissions to read or write a data.
To access a data from content provider, we need to use ContentResolver object in our application to communicate with the provider as a client. Generally, in android to send a request from UI to ContentResolver we have another object called CursorLoader which is used to run the query asynchronously in background. The ContentProvider object will receive data requests from the client, performs the requested actions create, update, delete, retrieve and return the result.
This is how the interaction will happen between android application UI and content providers to perform the required actions to get data. The Content URIs will contain the name of an entire-provider authority and the name that points to a table path.
Following are the list of methods which need to implement as a part of ContentProvider class. Following is the example of using Content Provider in android applications.
Here we will create our own content provider to insert and access data in android application. Create a new android application using android studio and give names as ContentProvider.
In case if you are not aware of creating an app in android studio check this article Android Hello World App. Now we need to create our own content provider file UserProvider. Once we create a new file UserProvider. ContentProvider; import android. ContentUris; import android. ContentValues; import android. Context; import android. UriMatcher; import android.You only declare content providers that are part of your application.
Content providers in other applications that you use in your application should not be declared. The Android system stores references to content providers according to an authority string, part of the provider's content URI. For example, suppose you want to access a content provider that stores information about health care professionals. To do this, you call the method ContentResolver.
The authority com. If either is " false ", the provider is disabled; it cannot be instantiated. Whether or not the content provider is direct-boot aware ; that is, whether or not it can run before the user unlocks the device.
Note: During Direct Boota content provider in your application can only access the data that is stored in device protected storage. Because this attribute was introduced in API level 17, all devices running API level 16 and lower behave as though this attribute is set "true". If you set android:targetSdkVersion to 17 or higher, then the default value is "false" for devices running API level 17 and higher. Granting permission is a way of giving an application component one-time access to data protected by a permission.
For example, when an e-mail message contains an attachment, the mail application may call upon the appropriate viewer to open it, even though the viewer doesn't have general permission to look at all the content provider's data.
The permission is specific to the URI in the Intent. The label should be set as a reference to a string resource, so that it can be localized like other strings in the user interface. However, as a convenience while you're developing the application, it can also be set as a raw string.
Setting this flag to true may improve performance by reducing the overhead of interprocess communication, but it also increases the memory footprint of each process. For more information on permissions, see the Permissions section in the introduction and a separate document, Security and Permissions. If the name assigned to this attribute begins with a colon ':'a new process, private to the application, is created when it's needed and the activity runs in that process.
If the process name begins with a lowercase character, the activity will run in a global process of that name, provided that it has permission to do so. This allows components in different applications to share a process, reducing resource usage.
Intents and Intent Filters
See also the permission and writePermission attributes. A permission that clients must have to make changes to the data controlled by the content provider.Mar 07,? Filed to: Internet Filter? Proven solutions. The Internet is the biggest source of information today. Millions of people head online on a daily basis so as to find data about various topics. Some are in search of academic information while others simply surf for leisure. The World Wide Web also contains various types of entertainment facilities.
There is video, animations, audio, movies, TV and much more. Some of the websites contain constructive material. On the other hand, there are some that contain inappropriate content.
Our children regularly visit the Internet for leisure or academic purposes. Therefore, it is important to use internet filter so that they do not end up viewing or consuming the inappropriate material. There are software tools which we can use for this purpose. Here are the 10 best content filterings today.
An Internet content filter is a special program that is designed to limit the website material which can be viewed on a particular device. This program makes use of technical strategies to block certain content and allow the rest to be viewed. Some examples of these strategies include black listing, white-listing, MITM processes, content flagging and more. This means that you can change its settings so as to determine the exact websites that should be blocked as well as the ones that can be viewed.
An web filtering software is ideal for children.
Intents and Intent Filters
This is so as to protect them from harmful digital material delivered by inappropriate sources. Examples of these are adult sites, racial sites and extremist websites. These softwares can also be used to limit the use of specific Internet resources. For example, a content filter program can be used to limit the amount of time that a child spends on social media.An Android Intent is an abstract description of an operation to be performed. It can be used with startActivity to launch an Activity, broadcastIntent to send it to any interested BroadcastReceiver components, and startService Intent or bindService Intent, ServiceConnection, int to communicate with a background Service.
For example, let's assume that you have an Activity that needs to launch an email client and sends an email using your Android device. The specified chooser gives the proper interface for the user to pick how to send your email data. For example, assume that you have an Activity that needs to open URL in a web browser on your Android device.
The Intent Resolver parses through a list of Activities and chooses the one that would best match your Intent, in this case, the Web Browser Activity.
The Intent Resolver then passes your web page to the web browser and starts the Web Browser Activity. Above example will search as tutorialspoint on android search engine and it gives the result of tutorialspoint in your an activity. The Intent object is passed to this method to launch a new activity or get an existing activity to do something new. The Intent object is passed to this method to initiate a service or deliver new instructions to an ongoing service.
The Intent object is passed to this method to deliver the message to all interested broadcast receivers. An Intent object is a bundle of information which is used by the component that receives the intent as well as information used by the Android system. This is mandatory part of the Intent object and is a string naming the action to be performed — or, in the case of broadcast intents, the action that took place and is being reported.
The action largely determines how the rest of the intent object is structured. The Intent class defines a number of action constants corresponding to different intents.
Here is a list of Android Intent Standard Actions. Adds a data specification to an intent filter. The category is an optional part of Intent object and it's a string containing additional information about the kind of component that should handle the intent.
The addCategory method places a category in an Intent object, removeCategory deletes a category previously added, and getCategories gets the set of all categories currently in the object. Here is a list of Android Intent Standard Categories.
You can check detail on Intent Filters in below section to understand how do we use categories to choose appropriate activity corresponding to an Intent.
This will be in key-value pairs for additional information that should be delivered to the component handling the intent. The extras can be set and read using the putExtras and getExtras methods respectively. These flags are optional part of Intent object and instruct the Android system how to launch an activity, and how to treat it after it's launched etc. If set in an Intent passed to Context. That is, the activity becomes the new root of an otherwise empty task, and any old activities are finished.
If set, and the activity being launched is already running in the current task, then instead of launching a new instance of that activity, all of the other activities on top of it will be closed and this Intent will be delivered to the now on top old activity as a new Intent. This flag is generally used by activities that want to present a "launcher" style behavior: they give the user a list of separate things that can be done, which otherwise run completely independently of the activity launching them.
This optional field is an android ComponentName object representing either Activity, Service or BroadcastReceiver class. If it is set, the Intent object is delivered to an instance of the designated class otherwise Android uses other information in the Intent object to locate a suitable target.
Explicit intent going to be connected internal world of application,suppose if you wants to connect one activity to another activity, we can do this quote by explicit intent, below image is connecting first activity to second activity by clicking button. These intents designate the target component by its name and they are typically used for application-internal messages - such as an activity starting a subordinate service or launching a sister activity. These intents do not name a target and the field for the component name is left blank.
Implicit intents are often used to activate components in other applications. The target component which receives the intent can use the getExtras method to get the extra data sent by the source component. Following example shows the functionality of a Android Intent to launch various Android built-in applications.
Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I tried to compromise security by setting android:exported to true for the provider, but FileProvider internally checks if itself is exported, when so, it throws an exception.
Using FileProvider from support library you have to manually grant and revoke permissions at runtime for other apps to read specific Uri. Use Context. As a last resort, if you can't provide package name you can grant the permission to all apps that can handle specific intent:.
Alternative method according to the documentation :. Permissions granted in an Intent remain in effect while the stack of the receiving Activity is active. When the stack finishes, the permissions are automatically removed. Permissions granted to one Activity in a client app are automatically extended to other components of that app. Fully working code sample how to share file from inner app folder.
Tested on Android 7 and Android 5. This solution works for me since OS 4. To make it work on all devices I added a workaround for older devices. This ensures that always the safest solution is used. Since as Phil says in his comment on the original question, this is unique and there is no other info on SO on in google, I thought I should also share my results:.
In my app FileProvider worked out of the box to share files using the share intent. There was no special configuration or code necessary, beyond that to setup the FileProvider.
In my manifest. And I am able to share my files store in my apps private storage with apps such as Gmail and google drive without any trouble. As far as I can tell this will only work on newer versions of Android, so you will probably have to figure out a different way to do it. This solution works for me on 4. Take careful note of how you specify the authorities. You must specify the activity from which you will create the URI and launch the share intent, in this case the activity is called SharingActivity.