An intent filter is an expression in an app’s manifest file that specifies the type of intents that the component would like to receive. For instance, by declaring an intent filter for an activity, you make it possible for other apps to directly start your activity with a certain kind of intent.
Some common types of intents that an activity might want to receive are:
- START_COMMAND: This intent is used to start an activity immediately.
- PUT_TEXT: This intent is used to send the contents of the text field in an activity to another app.
- READ_CONTENT: This intent is used to read the contents of a text field in an activity.
- ACTION_VIEW: This intent is used to open the activity’s view.
- ACTION_EDIT: This intent is used to open the activity’s view and allow the user to edit its contents.
- ACTION_PICK: This intent is used to open the activity’s view and select a specific item from it.
Read this first
An intent filter is a feature of Android that helps you manage your app’s behavior. It lets you specify which activities your app should perform when a user interacts with your app. For example, you might use an intent filter to let your app open a specific file when a user downloads it from the web.
What Is Intent Filter Category
IntentFilter is a category of Android filters. IntentFilters can be used to match against actions, categories, and data (either via its type, scheme, and/or path) n an Intent. IntentFilters also include a priority value which is used to order multiple matching filters. IntentFilter objects are often created in XML as part of a package’s AndroidManifest.
IntentFilter objects can be used to match against various types of data. For example, an IntentFilter object can be used to match against an action, a category, or a data path. IntentFilter objects can also have a priority value which is used to order multiple matching filters.
IntentFilter objects can be used to restrict the number of matches that are returned by an IntentService. For example, if an IntentService is used to launch an application, it might be desirable to only allow the application to be launched if it is the first application to matching the IntentFilter object’s priority value.
What Is Intent in Android With Example
The code below starts a new activity called MyActivity. The old activity, which is called MainActivity, is started in the background. This means that MainActivity will continue running even though MyActivity is started.
MainActivity. java
package com. example. intent; import android. app.Activity; import android. os.Bundle; import android. view.View; import android. widget.TextView; public class MainActivity extends Activity { TextView tv; @Override public void onCreate (Bundle savedInstanceState) { super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); tv = (TextView) indViewById (R. id. tv); tv. setText (“Hello, world!”); } }
MyActivity. java
package com. example. intent; import android. app.Activity; import android. os.Bundle; import android. view.View; import android. widget.TextView; public class MyActivity extends Activity { TextView tv; @Override public void onCreate (Bundle savedInstanceState) { super. onCreate (savedInstanceState); setContentView (R. layout. activity_my); tv = (TextView) indViewById (R. id. tv); tv. setText (“Hello, world!”); } }
What Is Intent and Its Types
Intent is an important part of Android. Intent helps you start an activity, send a broadcast, or start a service. Intents can be explicit or implicit. Explicit intents are declared in code and are easy to understand. Implicit intents are not declared in code, and they are harder to understand.
There are two types of intents: implicit and explicit. Implicit intents are automatically detected by Android. Explicit intents are added to an activity or service by the developer.
Implicit intents are automatically detected by Android. They are declared in code and are easy to understand. Explicit intents are added to an activity or service by the developer. They are not automatically detected by Android and must be added to the activity or service.
Implicit intents are declared in code and are easy to understand. They are automatically detected by Android and are used to start an activity, send a broadcast, or start a service.
Explicit intents are added to an activity or service by the developer. They are not automatically detected by Android and must be added to the activity or service. Explicit intents are declared in code and are easier to understand.
What Is Intent Filter Verification
The Intent Filter Verification Service system app on Android is a security feature that verifies the authenticity of apps that are trying to access your data. If you’re not comfortable with this app having access to your data, you can disable it in your device’s settings.
What Are Fragments in Android
Fragments allow you to create reusable portions of your app’s UI. A fragment defines its own layout and has its own lifecycle. It can handle its own input events. Fragments cannot live on their own–they must be hosted by an activity or another fragment.
What Is Manifest File in Android
AndroidManifest. xml is a file that describes the essential information about your android app to the build tools, the Android operating system, and Google Play. This file includes the following:
- The app’s name 2. The app’s package name 3. The app’s icon 4. The app’s description 5. The app’s minimum SDK level 6. The app’s target SDK level 7. The app’s required permissions 8. The app’s launch intent 9. The app’s activity classes 10. The app’s providers 11. The app’s resources 12. The app’s manifest file
AndroidManifest. xml is a simple XML file that contains a list of
- The app’s name 2. The app’s package name 3. The app’s icon 4. The app’s description 5. The app’s minimum SDK level 6. The app’s target SDK level 7. The app’s required permissions 8. The app’s launch intent 9. The app’s activity classes 10. The app’s providers 11. The app’s resources 12. The app’s manifest file
The following is an example of an AndroidManifest. xml file:
<manifest xmlns:android=”http://schemas. android.com/apk/res/android”
package=”com. example. myapp”
<application
android:name=”.MyApp”
android:package=”.MyApp”
android:icon=”@drawable/ic_launcher”
android:description=”@string/app_desc”
android:minSdkVersion=16
android:targetSdkVersion=21
android:requiredPermissions=”com. android. camera”
android:launchIntent=”com. example. myapp.MyActivity”
android:activityClass=”com. example. myapp.MyActivity”
android:theme=”@style/AppTheme”>
The
In summary
In Android, an intent filter is an expression in an app’s manifest file that specifies the type of intents that the component would like to receive. By declaring an intent filter for an activity, you make it possible for other apps to directly start your activity with a certain kind of intent. Some common types of intents that an activity might want to receive are:
– START_COMMAND: This intent is used to start an activity immediately.
– PUT_TEXT: This intent is used to send the contents of the text field in an activity to another app.
– READ_CONTENT: This intent is used to read the contents of a text field in an activity.
– ACTION_VIEW: This intent is used to open the activity’s view.
– ACTION_EDIT: This intent is used to open the activity’s view and allow the user to edit its contents.
– ACTION_PICK: This intent is used to open the activity’s view and select a specific item from it.
