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android - Coggle Diagram

- - - - android core libraries
        
        intent
        
        An intent contains a number of elements
        including the name,
        action, data, category, extras, and flags.
        
        The name element identifies the component that can receive an intent, the component name is optional.
        
        two types
        
        implicit
        
        An implicit intent is delivered to a component only if a filter matches.
        
        explicit
        
        actions
        
        predefined by android
        
        defined by users
        
        API
        
        NAME
        
        CATEGORY
        
        Flags
        
        Flags are used to specify how Android itself should handle the intent.
        
        data
        
        Extra
        
        handlers
        
        static
        
        filters
        
        dynamic
        
        Intent service
        
        Activity
        
        Lifecycle
        
        starting
        
        startActivity()
        
        hook methods
        
        onResume
        
        1 more item...
        
        finish
        
        finish()
        
        this method is used to close down the activity and to propagate the result back to the component that launched the activity.
        
        setResult()
        
        result code
        
        2 more items...
        
        paused
        
        onPause()
        
        onPause should be used to perform important cleanup operations. Things like committing unsaved state, or perhaps releasing system resources such as broadcast receivers, handlers to sensors, or any resources that may affect battery life while your activity is paused and the user doesn't need to use them.
        
        running
        
        onResume()
        
        onRestart is called when an activity comes to the foreground after having been stopped before.
        
        tasks
        
        A task is a group of activities the user interacts with when performing a certain job
        
        Activities in a task are stored on the so called back stack
        
        device home screen, shown here, is the starting point for most tasks.
        
        concurrency
        
        The second framework Android supports for concurrency is called the AsyncTask framework.
        
        One framework is called the HaMeR framework, which stands for Handlers, Messages, & Runnables.
        
        broadcasr_receivers
        
        There are two ways to register a receiver.
        
        statically register it by using the receiver tag in the Android manifest file.
        
        dynamically
        
        onReceive() hook method
        
        For example, it can't register other receivers, it can't bind to a service, nor can it show a dialog.
        
        goAsync()
        
        PendingResult()
        
        goAsync can be used to keep the broadcast active, even after returning from onReceive.
        
        mechanism
        
        normal
        
        ordered
        
        Context.sendOrderedBroadcast()
        
        sticky
        
        security
        
        namespace is global
        
        setPackage method
  - - - activity manager service