Android

it is easy to save and use. Paste the Code : Package Archie. android. activity; import android. app. activity; import android. OS. bundle; import android. view. keyevent; import android. view. motionevent; import android. view. view; import

Static modified static variables are easy to use and can be used in different classes and packages. They occupy memory independently in virtual machines. Yes, these are their advantages, however, after the project was launched, it was found that

I believe that the simplest storage method of Android is familiar to everyone, but there is a little trick, you may not have used it. Today we will share with you that we can encapsulate sharedpreferences in a tool class. When we need to write and

Recently, Google updated the android SDK version, but it cannot be automatically updated by any means. So I checked the relevant information on the Internet and wrote a Javascript script. I can write the address of the android SDK package to the

  Dialog Box Collection Yu Song Momo Original article reproduced, Please Note: Reproduced from Yu Song Momo blog original address: http://blog.csdn.net/xys289187120/article/details/6601613Yusong Momo takes you to check the dialog box in

Let's take a look at the effects I have achieved: A. B.   C. D.   Originally intended to be implemented with a spinner, It is known from the contact question in Android that the spinner is not so easy to use and cannot be well controlled. So here

Method 1: Write the following code to mulitpointtouchlistener. Java and then ontouchlistener the corresponding image.Example: imageview. setontouchlistener (New mulitpointtouchlistener ()); In XML, you need to change the image view scaling format to

1. Android obtains information about the installed APK files (packageinfo and resolveinfo) (Application images, application names, and Package Names) on the mobile phone)1. You can use packagemanager to obtain information about the APK file

① When using listview or gridview, when the list is empty, sometimes a special empty view needs to be displayed to prompt the user. In general, If you inherit the listactivity, as longTextview is automatically displayed when the list is empty. ②. If

1. Background Recently, two scrollviews are used for synchronous display. That is, when the scrollview on the left is dragged to scroll, scrollview on the right is synchronized to scroll. This situation is often used in complex interface la S. For

1. Preface In Android, views are often converted to bitmap. For example, screenshots are taken and images are generated for the entire screen view; coverflow needs to convert a page-by-page view to bitmap to achieve complex graphic effects (shadows,

The ownership of the activity, that is, the adsorption relationship between the activity and the task in which the activity should be located. We know that in general, in the same application, all started activities are in the same task, and they

1. required permissions: 2. Obtain all applications: Public list getallpagckage (context) {packagemanager PM = context. getpackagemanager (); intent mainintent = new intent (intent. action_main, null); mainintent. addcategory (intent.

At present, users have higher and higher requirements on the UI design of Android applications. Therefore, it is necessary to master some novel designs. For example, the traditional menus cannot meet users' requirements. The disk rotation menu is

1. Android gets Wi-Fi signal quality: Int strength = wifimanager. calculatesignallevel (info. getarg (), 5); that is, the signal strength. Method: Private string obtainwifiinfo () {// connection speed and signal strength of wifi: wifimanager =

Steps for implementing the sample: ①. Send two types of broadcasts in mainactivity: sendbroadcast and sendstickybroacat. ② In the receveractivity, the two messages are received through broadcastreceiver. Here, the code is used to register the

Sometimes, due to various reasons, USB cannot be used to connect to the device for debugging. At this time, you can connect to the device through WiFi. First, enable the WiFi settings of your phone to connect to the network. Then, you need to set

Click here to download the source code --> In fact, after writing this question, I also feel that I have joined the title party with honor. The so-called animation here is actually just the animation of the index small icon above. Let's take a look

1. Dip: Device Independent pixels (device independent pixel ).Different devices have different display effects. This is related to the hardware of the device. We recommend that you use this function to support WVGA, hvga, and qvga without

We all know that many applications will have a new feature display when they are used for the first time after installation. A good new feature display will bring a better user experience to the customer. Therefore, when we make an application, we