imo for android 2 3

- ActionAndroid:name= "Android.intent.action.MAIN" /> indicates that activity should be included in the system's Initiator (launcher) (allows the user to start it) - categoryAndroid:name= "Android.intent.category.LAUNCHER" /> Intent-filter> Activity> Application>Manifest>2.MainActivityAll the. java files are stored in the Java folder , Public class extends appcompatactivity { ///OnCr

Last introduced to you how to achieve a jump Method of the A-B in the app, this time I will introduce you to how to use the explicit intent of intent to access the system app. 1: Intent Introduction Intent data transmission can be divided into explicit and implicit intent. explicit means that a specific Activity can jump, while implicit intent means that there is no specific Activity. You need to set the action string to jump, each app in the system has a different string. Before accessing the s

Settings\android123\.android\debug.keystore 2. Executing in cmd: Keytool-list-alias Androiddebugkey-keystore "C:\Documents and Settings\android123\.android\debug.keystore"- Storepass Android-keypass Android Double quotes for your keystore position Execution results: Android

digits are transparent. 00--FF (0--255) has a total of 256 levels. 00 indicates completely transparent, and FF indicates completely opaque.2. How to drawOverride onDraw method:1.@Override2.protected void onDraw(Canvas canvas) {3.super.onDraw(canvas);4./// The image to be drawn5.}Each time the page needs to be refreshed or re-painted, or when the page needs to display components, onDraw will be called. In t

replaced by the loaded view, and the View object is returned. This allows the application to get a reference to the load view without additional execution of Findviewbyid (). Experience Sharing:The viewstub can be associated with the layout resource file specified in the XML file, allowing the layout resource file to be loaded again when it is needed. When and when to load, without having to load at the start of the boot. Doing so can speed up application startup and save memory

I. Summary Today we are going to learn about two slightly more complex widgets. Progressbar is often used for file loading, processing, and downloading. Listview is used to display content in the form of a list. Final effect: Ii. Three elements of listview: 1. listveiw is used to display the view of the list. 2. the adapter is used to map data to the mediation on the listview. 3. The specific string, imag

Android common error handling (2) and android common error handling The test month is very busy. After the test, you can continue to write code and learn more ...... I hope you will give me more advice ~ 1. java. lang. OutOfMemoryError 2. Images cannot be filled with ImageView This solution is actually quite simple

In addition to the ability to return data results from an activity, it is also very common to transmit data to an activity. 1. Create a new project, passdata. 2. Code in Main. xml. [Java]View plaincopy Android: layout_width = "fill_parent" Android: layout_height = "fill_parent" Android: Orientation = "vertical"

= "40dip" Android: textcolor = "# FFFF00" Android: layout_torightof = "@ ID/TV1" Android: text = "Layer 2"/> Android: Id = "@ + ID/TV3" Android: layout_width = "wrap_content" Android:

Basic tutorial for Android -- 8.3.6 Paint API -- Xfermode and PorterDuff (3)This section introduces: In the previous section, we learned the three sons in Xfermode: porterduxfermode, which is a parameter in the constructor:PorterDuff. ModeAfter viewing 16 image mixing modes, we wrote code to verifyThere are 18 different mixed-layout modes, and 18 are added with the ADD and OVERLAY modes! Of course, verifi

ActivitymanagerThe management of activity, why this class, can go online search, mainly in order to solve the return time of the activity management issues.2 Crash log capture CrashhandlerWhen the app exits abnormally, log the logs to the file so that we could analyze where to crash. See code for details.3 IP Monitoring IpmonitorNot used for the time being.4 Sellerapplication Application ClassThe applicati

2.1 create an Android Project Application Name: Application Name (Name displayed on the mobile phone)Project Name: Project NamePackage Name: Package Name Min SDK Version: Minimum running VersionCreate Activity: Main Activity Class Name Minimum Required SDK: Minimum Required sdkTarget SDK: select the Target SDKCompile SDK: Compile the SDKTheme: topicHolo: n. Complete; overallHolo Dark: All blackHolo Light: holographic LightNone (default) 2.2 analyze t

Android Study Notes 25. Service components (3) Use IntentService and androidintentUse IntentService1. Service DefectsBecause the Service itself has the following two problems: (1) the Service does not start a separate process, and the Service and its application are located in the same process; (2) the Service is not a new thread. If we directly process time-cons

The startActivity () method can call another Activity, but this method does not return a result for the current Activity. For example, if you have an Activity that prompts the user to enter the user name and password, and the information entered by the user needs to be "Returned" to the Activity, you need to use the startActivityForResult () method.1. Code in secondactivity. xml.Android: layout_width = "fill_parent"Android: layout_height = "fill_paren

its own Dalvik virtual machine instance.3. Application Framework LayerThe core application of the various api,android that may be used to build the application is to use these APIs, and developers can use these APIs to build their own applications.4. Application LayerApplications are all part of this layer, contacts, SMS, games, etc. are all.Summarize: The 1 A