Android

When using eclipse to import an existing project, you will often encounter:Unable to resolve target 'android-xx' similar error. This is because the imported project CodeThe project target setting of Project. properties is inconsistent with that of

The system used the gsensor of BOSCH_BMA222 and now requires MMA7660. Let's take a look at how to increase the driver and debug process. 1. Modify MakefieFirst, modify the Makefile (kernel/driver/misc) in the directory where the driver is placed,

This example shows how to slide between the left and right of an image in Android. The sliding effect is used in Android. In this example, ViewFlipper is used to implement the sliding effect. Of course, other views can also be used to implement the

After 4.0, the network access must be accessed by a separate sub-thread; otherwise, it cannot be run. Here there is a request tool class GetPostUtil. Copy codeThe Code is as follows: public class GetPostUtil { /** * Send a GET request to a specified

The ListView In the Android contact is unique, but the source code is relatively copied. It is not easy to extract it from the source code when we want to use it, and it is prone to errors, in the past few days, I have extracted it and written it as

Copy codeThe Code is as follows: public class LoadActivity extends Activity { @ Override Protected void onCreate (Bundle savedInstanceState) { Super. onCreate (savedInstanceState ); RequestWindowFeature (Window. FEATURE_NO_TITLE); // remove

To display a View component such as a Button on a custom View, complete the following tasks: 1. overwrite the structure of the parent class in the Custom View class (note that there are two parameters) Copy codeThe Code is as follows: public class

When the screen changes to a horizontal screen, the system will call the OnCreate method of the current Activity again. You can put the following method in your OnCreate to check the current direction, then, let your SetContentView load different

1) reclaim the Bitmap memory in time The Bitmap class has a recycle () method. The method name indicates recycling. Here I have doubts. The Android system has its own garbage collection mechanism, which can occasionally recycle unused memory space,

In actual development, the most commonly used multi-touch technology is the zoom-in and zoom-out function. For example, some image browsers can use multiple fingers to zoom in or out the images on the screen. For example, Some browsers can also zoom

Copy codeThe Code is as follows: public class DBOpenHelper extends SQLiteOpenHelper { // The class is not instantiated and cannot be used as a parameter of the parent class constructor. It must be declared as static Public DBOpenHelper (Context

When we download QQ For The First Time and open it, we will have a new user guide, which will be several images, plus some text instructions, sliding to the right until the end, early in the morning, I studied the ViewPager control on the

In a recently written Android system, you need to request data from the web server. A login Activity will be sent to the MainActivity after logon. Both the logon and MainActivity need to request the jsonapi of php, so we have to keep the session in

Copy codeThe Code is as follows: public class MenuEx extends Activity { Private static final String TAG = "android123 "; @ Override public void onCreate (Bundle savedInstanceState ){ Super. onCreate (savedInstanceState ); SetContentView (R. layout.

In the Android SDK, a timer is provided for us. This timer is called Chronometer. We can use it as a component of Android, and it also has its own unique method. The following is an example of how to use the timer and common methods. Like other UI

To add this function to the framework, write an appliction to obtain the running application: Let's take a look at the figure first: This app is mainly used to obtain non-system applications and some common system applications, display them in a

I. Basic Introduction The xmlpull method is strongly recommended for parsing xml in Android. Xmlpull is also applicable to javase not only on Android, but in the javase environment, you need to obtain the class library, kxml2-2.3.0.jar, xmlpull_1_1_

In the past, when I was working on a project in the company, I encountered a resolution adaptation problem. At that time, it was quite tangled. Because there was no Internet connection, this problem was all black and dark, and I tried many methods,

Automatic screen brightness adjustment:It is mainly to separate the LIGHT Sensor from the Sensor analysis, so we can analyze the automatic adjustment of the screen brightness (the mobile phone adjusts itself with the LIGHT intensity, that is, when

This method is applicable when focus cannot be obtained by all parent controls. A common problem in development is that the listview in a project is not just a simple text, but you often need to define your own listview, and your own Adapter will