Android

Write an article when you are idle. Recently, I am going to take a look at IOS development. It is said that I can develop IOS apps on a computer that supports virtualization, while Object-C is quite different from Java (complicated ). But I have an

I am troubled by work problems, so I have not written any blogs for the past few days. Recently, I felt I was lazy. As a programmer, we had to keep learning when we were charging, so we couldn't leave ourselves alone. Let's take a look at the use of

After studying the problems of breakthrough storage paths after taking photos, the storage paths are written to the following: private String folder = "/sdcard/DCIM/Camera, different cameras may cause problems in the path. A better way is to use

This document introduces the binary format of protocol buffer messages. You do not need to understand this when using protocol buffers in your application, however, it is very useful for you to know how different protocol buffer formats affect the

In the course of Android learning, network programming is required in many places. Unfortunately, I have never been familiar with network programming before, but to continue to learn more about Android development, I had to start from and hope to

The Android Activity switching animation means that when Activity A jumps from Activity A to Activity B, Activity A exits the animation and Activity B enters the animation. The implementation of this animation is very simple. After startActivity

Package cn. testsimeji; import android. OS. bundle; import android. view. view; import android. view. view. onClickListener; import android. widget. button; import android. app. activity; import android. content. intent;/*** Demo Description: *

The support. v4 package provides us with a very practical sliding control ViewPager. When using ViewPager, there is a need to note: That is: Android. support. v4.view. ViewPager. onSaveInstanceState NULL pointer and so on...   The error is as

Unlike the traditional Click Touch Screen, Android Touch Screen has some Gesture gestures, such as Fling and Scroll. These Gesture greatly improves user experience. In Android, Gesture recognition (detector) is implemented through the

First, define a method to check the network status in Activity:/*** determine the network connection status ** @ return true, available; false, */private boolean isOpenNetwork () {ConnectivityManager connManager = (ConnectivityManager)

The acceleration sensor is introduced in the previous article and tested in two ways: real machine and simulator. In this article, we will introduce several other sensors, which have the same processing method. Here we only use a real machine for

By analyzing the Activity source code, we know that each Activity has a logoff, so the main thread does not need to call Logoff When receiving messages. prepare () and logoff. loop (), but the thread does not contain Looper. When the thread wants to

private final static int kSystemRootStateUnknow = -1; private final static int kSystemRootStateDisable = 0; private final static int kSystemRootStateEnable = 1; private static int systemRootState = kSystemRootStateUnknow; public static boolean

Recently, I am working on an Android project. Due to lack of experience, I often encounter many difficult problems. I like CSDN to check information and often see good articles to solve the problems smoothly, I will also collect articles that help

Recently, the project requires a lottery turntable function. It takes a long time to draw the background, text, and image of each item, it will not catch up with the progress of the project, so it is a coincidence that the award and the turntable

As smartphones become more and more popular and mobile Internet develops rapidly, mobile phones are used to access the Internet and watch more and more news. I think mobile clients in the blog Park are also very necessary, previously, dudu released

--- Restore content start --- The display time of Toast is either of the following: Toast. LENGTH_SHORT: 2 seconds Toast. LENGTH_LONG: 3.5 seconds In addition, it is hard to write and give developers The right to customize the time, so the best

Main. xml Item. xml File_Adter Activity; List list = shortlist (); String currPath; Object getItem (getItemId (View getView (View v = View. inflate (activity, R. layout. item, TextView Txt_Name = TextView Txt_Size = ImageView img = File f =

This error was reported yesterday when adb cannot start in the group. Normally, this is the case. Let's take a look at the source code. Here we can see two branches, if (fd =-2 ){ // Follow this branch if the service has not been started

Method 1: Resources resources = getResources (); Float fPx = TypedValue. applyDimension (TypedValue. COMPLEX_UNIT_DIP, 300, resources. getDisplayMetrics ()); // Int iPx = Math. round (fPx ); // Similarly, px to dip:Float fDip = TypedValue.