create android app to control raspberry pi

Prefacesoftware version:Android Studio v1.0 version, due to v0.x since the software changes have been relatively large, many problem search solution is also v0.x version of the era, so first declare the version.motivation: due to the need for mobile software development in several ways of comparative research, it has the production of this article, it is estimated that there will be other technical solutions to the post.goal: in order to adapt to cross-platform requirements, so write a page with

message.Workaround 2:1. Set environment variable: Android_sdk_home value is your SDK directory. As I do: the variable name android_sdk_home value is E:\JAVA\ANDROIDSDK2. Modify the configuration file in the Eclipse installation directory: Locate the following file: Eclipse\configuration.settings\org.eclipse.ui.ide.prefs after opening, add the environment variable that you just configured later.As I added: android_sdk_home=e\:\\java\\androidsdk (note slash format)3. Restart Eclipse and rebuild t

One: Create New Project1, 2, 3, 4,After creating the results, we found that you have created some demo pages and the data is already bound.Two: Resolve error 1, after the creation of the success, build found an error, as follows:This error is due to a workaround for the version issue, which modifies the version number to the following:And then you get an error:As a programmer, this small mistake to believe that it is difficult for you to solve yoursel

Open Source: Android app Novice Guides Open source ControlWhen an app first touches a user or has a large version update, the user is often the novice guide, and a good beginner's guide often makes it easy for new users to quickly learn how to manipulate your app's capabilities. The importance of novice guidance is self-evident. This article collects and collates

Several optimizations when using ListView to create an App Store in AndroidPackage com. example. ex01_1; import java. io. file; import java. io. fileOutputStream; import java. io. IOException; import java. io. inputStream; import java.net. malformedURLException; import java.net. URL; import java.net. URLConnection; import java. util. arrayList; import java. util. hashMap; import

For details about how to use the Spinner control in the Android PopupWindow, click APP Crash !, Popupwindowspinner The exception information is as follows: Android. view. WindowManager $ BadTokenException: Unable to add window -- token android. view. ViewRootImpl $ W @ 4190f

In this section, we will learn how to create an interface with text input boxes and buttons in XML. The next lesson will learn to make the APP respond to buttons--when the button is pressed, the contents of the text box are sent to another Activity.Android's graphical user interface is built from multiple views (view) and view groups (ViewGroup). View is a common UI form widget, such as button, Text field,

Android operating system for In addition, if the user wants to add an app shortcut to the device's home screen, you can press and hold the app's icon in launcher, and the Android system will automatically add a shortcut to the app on the home screen. The name and icon are the same as in launcher.In addition to supporti

Tesseract is an open source OCR engine that complies with the Apache License 2.0 protocol. Here's how to compile Tesseract on the Android platform and how to quickly create a simple OCR application. Reference Original: Making an Android OCR application with Tesseract Tesseract Android ToolsTo compile the

1. Create an android project. In the menu, choose File> New> Android project. 2. The items displayed in the pop-up dialog box are as follows:"Project name:". Enter the project name here;"Build target:", select the build target of the new Android project. In this article, there are two options: "android2.1-update1"

can be created less. 2, to avoid unnecessary drawing logic, when needed to draw. This needs to be adjusted based on the control's drawing logic, which is also very important. 3, the general principle is to do everything possible to control the implementation of the OnDraw method within 16ms, will not be card. Finally, look at the effect we've achieved. Source Address: GitHub Address The above is a small set to introduce

source code, analysis theme related Settings 7.When the activity is ready, notify Ams,ams final call to Activity.makevisible () 8. Activity.makevisible () Source Code, window type is type_application. Viewgroup.addview "level" Judge WindowManager level 9. Localwindowmanager.addview (Windowmanagerimpl.addview an app has only one this object), which contains 3 arrays. Complete key additions through Viewroot.setview.Four, the window added 10. Array mvie

directly into the project, or build it using Gradle to add compile dependency: dependencies { compile ' com.android.support:appcompat-v7:+ ' compile ' com.android.support:cardview-v7:+ ' compile ' com.android.support:recyclerview-v7:+ '} Put the above apptheme style to Res/values-v21/style.xml, and then res/values/style.xml add a Apptheme, as follows: This can be done in much the same way as material Design, but there are some effects that cannot be achieved because the low version do

, setting the method that has the state on or off. Another way to set up listener events/** * Set the status of the switch * * @param state */public void Settogglestate (Boolean) {currentstate = states;} public Boolean gettooglestate () {return currentstate;} public void Setontogglestatechangelistener (Ontogglestatechangelistener listener) {Montogglestatechangelistener = Listener;}Here, the whole process of customizing the ToggleButton is done. Then we can use the custom

Step-by-Step android development: Create an APP desktop shortcutZookeeper I have referenced more than N documents on the Internet, and finally found that it is more reliable to write, so I will not repeat the creation of shortcuts. // Create a shortcut Private void addShortcut (){ Intent shortcut = new Intent ("com.

Create a Material Design-style Android app-use Drawable and androiddrawable The following Drawables functions help you implement Material Design in applications:Image resource coloring In android 5.0 (api 21) and later versions, bitmap and. 9 png can be colored by defining transparency. You can use color resources or t

Create a Material Design-style Android app-application topic All my articles first published on my blog, welcome to attention, address: http://blog.isming.me Android 5 was officially released yesterday, And the android developer website was also updated. The

Android Studio Create a new HelloWorld program (APP) NewOr start the program directly (note: If you already have a program, this method will open the last time you close the program directly) Change the app name Choose App Run Platform Select a template Cha

Different Layouts To improve user experience on screens of different devices, you should create a unique XML layout file for each screen size you want to support. Each layout file should be stored in the appropriate Resource Directory, which uses the screen size-as the suffix. For example, a layout file for large screens should be placed under the res/layout-large/directory. Note:Android automatically scales your layout to adapt to the screen. In thi

: Com.android.launcher.action.UNINSTALL_SHORTCUT*/Intent addintent = new Intent ("Com.android.launcher.action.INSTALL_SHORTCUT");/**android specifically provides Intent.ShortcutIconResource.fromContext to create a shortcut icon, and finally returns it through Setresult */parcelable icon = Intent.ShortcutIconResource.fromContext (Mainactivity.this, R.drawable.ic_launcher);Intent myintent = new Intent (mainac