imo for android 2 3

Android development Tips (3)1. UIAutomatorViewer Automated testing is the trend of Android testing. It is stable and reusable. The most common tool is Espresso.Use UIAutomatorViewer to obtain the resource Id,Location/android-sdk/tools/uiautomatorviewer, click to use. 2. Git

= "Match_parent"android:src= "@drawable/img1"Android:id= "@+id/iva"/> ImageViewAndroid:layout_width= "Match_parent"Android:layout_height= "Match_parent"android:src= "@drawable/img1"Android:id= "@+id/ivb"/>Framelayout>3.LinearLayout Linerlayout is a linear layout in Android. The horizontal or vertical direction of its child objects is lined up. The attribute android:orientation can control the direction o

acquisition layer includes obtaining local files, streaming media files, and sending the camera control information. The former only needs to read local files, and obtaining streaming media files requires obtaining media data from the Streaming Media Server. The streaming media file acquisition part includes the session negotiation part, data transmission part, and data buffer part. In the media information negotiation section, you need to use the RTSP Protocol [

C language basics Lesson 3 Use of ADB (Android Debug Bridge) Since I have published a Linux blog before, I will not post a blog on Linux basic commands separately. In this tutorial, I will use adb to connect to a mobile phone to review basic Linux commands. You are also familiar with the underlying operations of mobile phones. you can install software, uninstall software, and transmit data from PC

We have learned how to call an activity in a single application. However, an important aspect in android development is to use intent to call the activity of other applications. In particular, your application can call many "built-in" applications in the system. The so-called "built-in" application refers to applications at the same level, such as Browser, Phone, and Sms. For example, if your application needs to open a webpage, you can use the Intent

MainActivity is as follows: Package cc. testviewstudy3; import android. OS. bundle; import android. view. view; import android. view. view. onClickListener; import android. app. activity;/*** Demo Description: * learning about custom View (3) ** there are three methods to im

1. Example description Since Android 3.0, Android has introduced actoinbar. It must be said that before Android 3.0, the title bar of Android is really ugly and there is no function yet. In the past, the top columns of many applications were similar to Apple, for example. With the release and gradual expansi

First, the installation configuration of the JDKCreate a new folder under the Personal home folder software, under software New Java folder, for storing various Android development programs, my user name AAA, so the full directory is/home/aaa/software/javaThen copy the jdk-7-linux-x64.gz to the/home/aaa/software/java/directory, right-click Unzip, the Jdk-7-linux-x64 file will appear, right-click again to extract the jdk1.7.0 folder, 1-1:Figure 1-1Next

) and Framework layer, and finally the upper-layer App layer. The overall framework is roughly the same. Of course, many apps do not need to understand this knowledge. However, for hardware-related programs, such as Camera, FM radio, and music player, audio, Sensor, therefore, for the convenience of debugging programs and the development of new features and the full use of hardware performance, you may need to understand the entire processing process to add new features, such as camera exposure,

Android java-layer audio analysis and understanding (3) Call-related Multiple apps in Android need to support audio playback. When multiple applications need to output audio at the same time, is it all output? Or output one of them? If one of them is output, which one is output? What are the criteria for defining? To process these relationships.

already integrated IDE, just install the JDK can begin to develop, recommend beginners download ADT Bundle, no need to toss the development environment.3.SDK ConfigurationAndroid Development must have the SDK, you go to androiddevtools inside, follow the instructions, download the package, unzip directly, and then configure the SDK environment variables can be used, do not have to go through the SDK Manager to install.Simply note the installation of

settings: Setcontentview (R.layout.activity_main); Enter a new line of code to retrieve the button as follows: Thebutton = (Button) Findviewbyid (); Enter another period "." --eclipse displays a list of existing ID values. Currently we only add an ID value, select the ID name we set for the button-that is, "MyButton".You will use this method regularly to implement resource references in Java code. Now we should have the following line of code: Thebutton = (B

First, the problem description Double navigation tab Toggle (bottom chunk + area head navigation), implement the bottom area of the scheme using Fragmenttabhost+fragment, the area of the head navigation using Viewpager+fragment, Can be in the previous blog Android Typical interface design 2 (fragmenttabhost+fragment implementation of the bottom tab switch) based on and

Android View measure (3) Common Methods ViewGroup. measureChildren () ViewGroup. measureChild () ViewGroup. measureChildWithMargins () /*** Ask one of the children of this view to measure itself, taking into * account both the MeasureSpec requirements for this view and its padding * and margins. the child must have MarginLayoutParams The heavy lifting is * done in getChildMeasureSpec. ** @ param child

fit into widget instancesThe view of the widget instance is controlled by remoteviews, and the sample is made in a static way. Code snippets such as the following:public class Birthdaystoredata {... ...public static void Updateappwidget (Context context,int widgetid,string name, String date) {//"1" To set remote View information///1.1), Get remote View objectremoteviews views = new Remoteviews (Context.getpackagename (), r.layout.birday_widget); ///1.2), SetText () settings for remote viewView

Android callback function 2: application instance and android callback function If you do not understand the android callback concept, see android callback function 1: Basic concepts. 1. Define Interfaces package com.app.util;public interface ZYJCallBack { public void data

2. Change Activity to a window: Activity attribute settingIt's easy to talk about it. Some people may want to make the app something floating on the main interface of the mobile phone.You only need to set the Activity topic to define the Activity in AndroidManifest. xml.Local sentence: Xml Code Android: theme = "@ android: style/Theme. Dialog"

Android interview questions (2) and android interview questions 1. What is the difference between int and Integer? Java provides two different types: The reference type and the original type (or the built-in type ). Int Is the original data type of java, and Integer is the encapsulation class provided by java for int. Java provides encapsulation classes

Android animation details 3 animation API Overview· Differences between property animation and view animation The view animation system provides the ability to only animation View objects, so if you want to animation non-View objects, You need to implement code by yourself. In fact, the view animation system is forced to only animation a few attributes of the View, such as scaling and rotation, rather than

the API there are differences, you can use the following methods:try {Class Smode = Class.forName ("Android.os.StrictMode"); ///1, detect if the class exists, if not present, will throw ClassNotFoundExceptionMethod enabledefaults = Smode.getmethod ("Enabledefaults"); ///2, get a method of this class, for example Strictmode.enabledefaults ()Enabledefaults.invoke (NULL); ///3, call this method. This example