Intent, IntentIntent
Intention
Intent's role in Android:1. Activate system components, such as startActivity (Intent) and startService (Intent)2. Transfer Data between system components
Log
Username: Lily gender: Female email: lily@qq.com
Chestnuts
Data transfer between two activities, jump from MainActivity to SecondActivity, and pass data
Activity_main
Https://developer.android.com/guide/components/intents-filters.htmlIntentis a messaging object that you can use to request operations from other application components. Although Intent can facilitate communication between components in a number of ways, its basic use cases include the following three:
Start Activity:ActivityRepresents a screen in an app. Intent startActivity() You can start a new instan
/Explicit Intent: You must specify the full package name and class name of the component to be activated (the application is coupled together)When you normally activate your application's components, you use theImplicit intent: You only need to specify the actions and data you want (there is no coupling between the benefits of the application)Activate the app's implicit
The StartActivity () method can invoke another activity, but this method does not return a result to the current activity. For example, if you have an activity that prompts the user for a username and password, and the information entered by the user needs to be "returned" to the activity of the input information, the Startactivityforresult () method is required.
1. Code in the Secondactivity.xml.
2. Code in the Secondactivity.java.
public class
Secondactivity extends activity {
Action: A string constant that sets the action to be completed by intent. Use Setaction () to set the Action property and use Getaction () to get the Action property. You can either use the system's built-in action or define it yourself. System custom ACTION, such as Action_view, Action_edit, Action_main, and so on.
1. Custom Action
Specify an action constant in the androidmanifest.xml of the destination activity.
Copy Code code as follows:
Tags: Android development intent category
Intent serves as a bond between activities, and its function is not only limited to simple data transmission. Its built-in attributes allow you to conveniently complete many complex operations. For example, you can directly call the dial-up function and automatically call appropriate programs to open different types of files.
Category:
The category attribute is used
If multiple activity has the same intent action, what happens when starting with the same action? How do I specify an activity to start? In cases where multiple activity has the same intent action, if you want to start a specified activity, the Add StartActivity (New Intent ("Com.w.learnintent.intent.action.myaty", Uri.parse ("app://myaty1"));second, how toinitia
It is important to understand how the chat robot (chatbots) works. A basic mechanism of chat bots is to use text classifiers for intent recognition. Let's look at how the Artificial neural network (ANN) works internally.
In this tutorial, we will use the 2-layer neuron (a hidden layer) and the word bag (bag of words) method to organize our training data. There are three ways to classify text: pattern matching, traditional algorithms and neural network
Intent (3) transmits data to the next activity, and intent transmits data
The downward transfer activity is very simple. You can use the putExtra () method to reload the data that we want to transfer to intent temporarily. You can retrieve the data from this when starting the activity.
First, we start SecondActivity by explicitly declaring
plaincopypublic class SecondActivity extends Activity {@ OverridePublic void onCreate (Bundle savedInstanceState ){Super. onCreate (savedInstanceState );SetContentView (R. layout. secondactivity );// --- Get the data passed in using getStringExtra ()---Toast. makeText (this, getIntent (). getStringExtra ("str1 "),Toast. LENGTH_SHORT). show ();// --- Get the data passed in using getIntExtra ()---Toast. makeText (this,Integer. toString (getIntent (). getIntExtra ("age1", 0 )),Toast. LENGTH_SHORT)
Android Application Framework with borderless design intent, android with borderless design intent
The description of the feature space outside the Android Application Framework is clearly described in the SDK documentation, and the basic concepts and component lifecycles of Android applications are described in detail. In the feature space, Android provides the following concepts: Activity, Service, Broadc
(Android review) explicit and implicit intent Activation
I. Basic knowledge points
1,
Label attribute: the title of an Acivity.
2. Do not introduce the R file into an error.
3. intent. setClass (this, Main2Activity. class );
First parameter: Context
Second parameter: the bytecode file of the component to be activated
4. Explicit activation (explicitly specifying the component to be activated
Intent object, intent
The Intent object represents an Intent in the Android system. The most important content is action and data. Data can be transmitted between activities through Intent objects: Intent objects are generated in
Intent connecting two different components during program run (acvivity)For example, when we click on a contact on the phone to view its information, we need to tell Android via intent, I want to do a "view" actionTo achieve the jump from interface A to interface BDeclaration method: Intent Intent = new
Intent useThe most commonly used are:New Intent (); Intent.setclass (Main. this, New. class ); startactivity (intent);Other uses of the intent:Open a Web site:Uri uri = uri.parse ("http://www.shike.im/");Intent it = new Intent (Intent.action_view, URI);StartActivity (IT);Ope
First, let's look at the Network Statement:
Android. Intent. Action. Main determines the applicationProgramThe first
Activity Android. Intent. Category. launcher determines whether the application is displayed in the program list. After the experiment, I found a problem?
Main and launcher are not independent tasks;
Which of the following statements is true?
My test result is that if an application does
We already know that an activity calls another activity by using an Intent object. To allow other activities to respond, you also need to configure the
[Java]
1. Create a project and create a class: MyBrowserActivity. java. Create an xml file brwoser. xml in res/layout.
2. AndroidManifest. xml
[Java] Package = "net. learn2develop. Intents"Android: versionCode = "1"Android: versionName = "1.0" type = "codeph" text = "/codeph">Android: icon = "@ drawa
To solve the problem that the system camera program is called through Intent and the image returned is too small, intent calls
Intent it = newIntent("android.media.action.IMAGE_CAPTURE");startActivityForResult(it, Activity.DEFAULT_KEYS_DIALER);
After you press the photo key, your activity will be returned. Therefore, you must add a processing method to the onActi
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