Intent Messaging and resolution in Android
In Android, an intent is a message that is used to request an action from another app component. It can be used to start a service, launch an activity, or deliver a broadcast message.
When an intent is created, it can be explicitly targeted at a specific component (e.g., a specific activity or service) or it can be sent as an implicit broadcast to any app component that can handle it. The Android system matches implicit intents to the appropriate components based on intent filters, which are declared in the app’s manifest file.
Intent filters are used to describe the types of intents that a component can respond to. They consist of one or more intent filter tags that specify the actions, data types, and categories that the component is interested in. When an implicit intent is sent, the Android system compares the intent’s action, data type, and category with the intent filters of all installed apps to determine which app components can handle the intent.
Once the Android system determines which component should handle the intent, it launches the component and passes the intent to it. The component can then extract any data from the intent that it needs to perform its action.
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