Two Methods for Android to listen to wi-fi broadcasts

1. Declaration in XML 2. Register in the codeIntentFilter filter = new IntentFilter ();Filter. addAction (WifiManager. NETWORK_STATE_CHANGED_ACTION );Filter. addAction (WifiManager. WIFI_STATE_CHANGED_ACTION );Filter. addAction (ConnectivityManager.

Android am pm command

The am pm command in the adb shell, some of your own opinions and translations on most official websites. Let's talk about the am command, which is short for activity manager. You can use am to simulate various system behaviors, such as starting an

Helloworld for Android

It is very easy to create HelloWorld in Eclipse + ADT. Just follow the instructions in the next step. The focus of this article is not on how to create, but on understanding the files of the HelloWorld project. For more information, see The

Android determines the SDK version and network connection

Public static int getSDKVersionNumber (){ int sdkVersion;try {sdkVersion = Integer.valueOf(android.os.Build.VERSION.SDK);} catch (NumberFormatException e) {sdkVersion = 0;}return sdkVersion;} public static boolean hasInternet(Activity activity)

Android string processing

Requirement: implement the scrolling of long text, so you need to cut the long string into a string array with the specified TextView length, and then implement it using ViewFilpper.The split code is as follows: /** Split the String as required

Android single-choice dialog box and multiple-choice dialog box

Main. xml   MainActivity Import android. OS. bundle; import android. app. activity; import android. app. dialog; import android. app. alertDialog. builder; import android. content. dialogInterface; import android. view. view; import

How to Establish a mobile Internet?

Why do we need to develop web pages into mobile apps? According to Strategy Analytics, in China, Android smartphones accounted for 87.7% of smartphone shipments in the third quarter, higher than 60.5% in the U.S. market. Dr. Liu Yun, vice president

Android 4.1 source code compilation cannot find the resource file solution

When modifying resource files in the Android framework, before Android 4.0, the corresponding resource files are directly added under sourcecode/frameworks/base/core/res, then compile the framework-res, but this situation changes in Android 4.1.

Smoke effects of android engine using particle system

@ OverrideProtected Scene onCreateScene (){Final Scene scene = new Scene ();Sprite background = new Sprite (0, 0, backgroundTextureRegion, getVertexBufferObjectManager ());Scene. attachChild (background );Rectangleparticle emitter = new

Modify Linux kernel boot logo and center full screen display

1. Prepare Images Using the Graph Software GIMP that comes with ubuntu is the fastest way to convert images. You can also use commands to convert images. In actual testing, an error is prompted, so you can use GIMP to process the image. The specific

Android file Operations

For android files, you must have the following permissions: Determine whether the SD card is inserted Environment. getExternalStorageState (). equals ( Android. OS. Environment. MEDIA_MOUNTED ); Obtain the SD card root directory File skRoot =

Solve common problems in android Development

1. If the R file of your project is missing, you can try to save the version number. The R file is usually caused by layout text errors. 2. The layout file cannot contain uppercase letters. 3. the following error is thrown: Application does not

Android screen and unlock event broadcast listening

To listen to the screen SCREEN_ON and SCREEN_OFF actions in a program, you can monitor the screen lock status to implement your own functions. The strange thing is that these two actions can only be listened to after they are registered in the form

Memory release after Android program exits

A problem was found during the Android project: when the application exits, click "set" to view the application. The page shows that you can click "force close ".I think this is caused by the fact that the opened activity has not been destroy, and

Controls the power consumption of Android applications

Let's take a look at the main usage of Android phones: Obviously, most of the electricity is consumed by network connections, GPS, and sensors. In short, it consumes a lot of power in the following situations: 1. Transmission of large data volumes.

How does android map obtain the Google Map API key?

The first thing to do is to obtain an MD5 key(of course, It is implemented through the keytooltool (keytool.exe) of JDK) 1. Here, there are two main work aspects: keytool and debug. keystore. 2. First, find debug. keystore! (Go to the Eclipse

Usage of Timer and TimerTask in Java in Android

In development, we sometimes need to execute a task at a fixed interval. For example, if the controls on the UI need to change over time, we can use the Timer tool class provided by Java, namely Timer and TimerTask. Timer is a common class with

Use Adobe AIR geo-location API in Android

In your Android device, when the device location changes, your application can use any of the following location sources to receive updated information, it includes information such as height, precision, direction, speed, and timestamp: GPS

Development Technology comparison between Android 4.0 and WP7.5

Comparing Google Android 4.0 Ice Cream SandWich and Microsoft WP7.5 Mango in development technology, we can see that Google learned Microsoft's WPF design method in the early days. Due to the slow release of Microsoft Windows Phone 7, as a result,

Android permission details

Android permission description Various permissions are often designed when developing android programs. To read security-sensitive items during program execution, you must declare relevant permission requests in androidmanifest. xml. The permissions

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