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First, what is activity?Activity simply means an interface. Every interface we see on an Android phone is an activity.Ii.creation of activity1. Define a class to inherit activity, and then register the activity in the application node of the
Android starts the activity anonymously and starts the system activity
Generally, when we use Intent for activity jump, we all know the name of the activity to jump to, for example:
Intent intent=new Intent(FirstActivity.this,SecondActitivy.class);startActivity(intent);When
If you want to, you can hide the title bar of the Activity. You only need to call the requestWindowFeature () method and pass the constant Window. FEATURE_NO_TITLE.Package net. horsttnann. Activity101;Import net. horsttnann. Activity101.R;Import android. app. Activity;Import android. OS. Bundle;Import
1. The activation process of the child activity component within the processIn the startup process of the Android activity component http://blog.csdn.net/jltxgcy/article/details/35984557, we have analyzed the activation process of the activity in detail, We only analyze the differences between the child
(Switch) Android system comes with Activity style (@ android: style/), android @ android
Configure in the activity of the AndroidManifest. xml file
1. android: theme = "@
Ask the Android developers to help me look at this problem: android:l Aunchmode= "singleinstance" > such as: I set the secondactivity inside the boot mode is singleinstance, activity one start activity two, activity two start activity three. Such as:Activity one inside: I
First, what is activity?Activity is simply an interface, and every interface we see on an Android phone is an activity.Ii.creation of activity1. Define a class to inherit activity, and then register the activity under the application node of the
calls the Finish method or the system to save space to temporarily kill it, you can use isfinishing () to judge it, If you have a progressdialog that rotates in the thread, cancel it in the OnDestroy, or the Cancel method that calls dialog will throw an exception when it ends.Note:onpause,onstop, OnDestroy, three kinds of state activity can be killed by the system.Normal start activity:oncreate-> OnStart, Onresume (start)Normal exit
The reason for remembering to write an activity-specific helper activity is that when you test online, idea or the specified run activity function in Android Studio is not available.The following interface is specified in the IDE to run activity:650) this.width=650; "src=" H
rebuilt,The system calls the Onsaveinstancestate method and saves a temporary data in the bundle object. When the activity is destroyed and then rebuilt, call the Onrestoreinstancedstate method from which we can remove the saved data from the log as follows:But when the activity is destroyed and rebuilt, which is sometimes not what we want, how should we avoid it? This is what we should configure in the
=". Secondactivity ">activity> Application>manifest>In the mainactivity we rewrite the onconfigurationchanged, the prototype is as follows: @Override publicvoidonConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); LogUtils.e("onConfigurationChanged is invoke!!!"); }We run the program, and then we perform a screen shift to see the printed log inf
It is recommended that you read the following two articles first so that you can better understand the load pattern of the activity:Android process, threading model:Http://www.cnblogs.com/ghj1976/archive/2011/04/28/2031586.html a description of the "Android single-threaded model", understand some of the activity's considerations.The relationship of Android application Task activitiesHttp://www.cnblogs.com/g
Android Basics Four Components-activity
1. What is activity
2.Activity life cycle
3.Activity Life Cycle Demo
Communication between the 4.Activity
5.Activity Loa
App->activity->custom Dialog Example using Activity to implement a custom dialog boxThe class customdialogactivity itself is nothing special. The key point is its definition in Androidmanifest.xml: android:label=" @string/activity_custom_dialog " Android:theme = "@style/theme.customdialog"> Customdialogactivity uses a custom Customdialog style (Theme).
singleinstance activity is initiated by another activity, it is also placed in a different task than the caller.Although it is a two task, in the system's task manager, it always shows one, which is the task at the top.In addition, when we enter this application from the Task Manager, it is not possible to go back to Task1 by the return key.Fortunately there is a way to solve this problem, that is mentione
1 Reason: When you search for activity on the Internet, it basically tells you that eitherXMLOr isoverridependingtransition, but if you are the service startup activity what to do, this online does not have an answer, so I think about it, found in fact very simple. 2 Solution:In fact, it is very simple, let us understand the principle, so-called activity switchi
The startactivityforresult () method was used in a recent App , and there were some problems with it, such as when I Activity A calls the method to jump in activity b , and if a series of actions are completed in b jump to A Span class= "token MD md-em md-close" > , A in Onactivityresult () , but if the user cancels the operation, such as pressing the back key in B, it will ca
, see
Http://developer.android.com/reference/android/R.styleable.html
PS: Here again to provide you with a androidmanifest function of the online inquiry form for your reference:
Android manifest Features and Permissions description Encyclopedia:Http://tools.jb51.net/table/AndroidManifest
For more information on Android
Example: The decompiled package knows how to cook...
Androidmanifest. xml pay attention to the Android: Theme attribute of the application node.
Here, the main part is styles. xml.
Slide_left_in.xml
Slide_left_out.xml
Slide_right_in.xml
Slide_right_out.xml
The activity code is very simple, that is, startactivity does not need any special
Package COM. example. activityanimationdemo; impo
After setting android: parentActivityName, click the return key of the sub-Activity. The parent Activity always calls the OnDestroy () solution,
I 've been checking this for a long time and share it with you,
The principle is very simple. An Activity declares android: parent
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