Android

Android NFC 1. Check whether nfc is available [Java]NfcManager manager = (NfcManager) Context. getSystemService (Context. NFC_SERVICE );NfcAdapter adapter = manager. getdefaadapter adapter ();If (adapter! = Null & adapter. isEnabled ()){// Adapter

Problem: The ListView is nested in ScrollView. The ListView displays only one more row. Bytes -------------------------------------------------------------------------------------------------- Solution: I have posted the core code here. Publicclass

1. Rotation function: GlRotatef (float angle, float X, float Y, float Z) Angle specifies the Rotation angle of an object. The X, Y, and Z parameters jointly determine the direction of the rotation axis. That is, the glRotatef function rotates the

1. Four pyramid: composed of four triangles.Ry: consists of six triangles. Difficulty: when constructing the vertex coordinates of a 3D space, to make the object rotate around its own axis, the central coordinates of the object must always be (0.0f,

GL_NEAREST and GL_LINEAR The former indicates "using the color of the pixel closest to the coordinate in the texture as the pixel color to be drawn ", The latter indicates that "the pixel colors to be drawn are obtained using the weighted average

I. Basic Knowledge: [Plain]Android: layout_above: Move the control's bottom to the control with the given IDAndroid: layout_below: place the top of the control under the control with the given IDAndroid: layout_toLeftOf align the right edge of the

Android applications can be installed on local built-in storage, or on External Storage (SD card ). After API 8, that is, Android2.2, we can install APK on external storage. This is an optional feature that can be configured in the manifest file of

Respond to the Send ButtonTo respond to the button's on-click event, open the main. xml layout file and add the android: onClick attribute to the element: Android: layout_width = "wrap_content"Android: layout_height = "wrap_content"Android: text = "

[Java]Core interface code:Package com. hyxf. main;Import android. content. Context;Import android. hardware. Sensor;Import android. hardware. SensorEvent;Import android. hardware. SensorEventListener;Import android. hardware. SensorManager;Import

Here we will summarize the usage:In fact, it is very simple, mainly involves the following steps:1. Step 1: Define the aidl file (you can refer to the definition of IWifiManager. java to define an Interface and provide the called method );For

    We inherit SurfaceView when creating our own view. Then override the surfaceCreate method. The following code is used: [Java]@ OverridePublic void surfaceCreated (SurfaceHolder holder ){ScreenW = this. getWidth ();ScreenH = this. getHeight ();Bp_

I. fastboot command details Android mobile phone partition (each partition has the corresponding imgfile ): Boot screen area (splash1), data recovery area (recovery), kernel area (boot), system area (system), data cache area (cache), user data area (

One of the questions in the interview is to send (accept) xml and parse it. At that time, I had contact but did not pay attention to it. So I came back to pay close attention to it and recorded it here. Let's take a look at it

Problem description: I added a website in webview. When you click a link "Full Site" and I want to enable the default browser of the mobile phone, how can this function be implemented? Currently, it loads a complete website in the web View. Solution:

You can think of a fragment as a modular section of an activity, which has its own lifecycle, es its own input events, and which you can add or remove while the activity is running (sort of like a "sub activity" that you can reuse in different

Implementation: Layout file: vlist2.xml? program code: /*** @ author allin **/public class MyListView4extends ListActivity {private List mData; @ Override public void onCreate (Bundle savedInstanceState) {super. onCreate

Implementing an effective and user-friendly sharing operation in your ActionBar is even easier than the ActionProvider introduced in Android4.0 (API Level 14. Once the ActionProvider is bound to a menu item in the Operation column, the menu item

Android reminderThere are three main methods for android Notification: Toast Notification, Status Bar Notification, and Dialog notification. Many Dialog notifications are used in Standup Timer. Especially when deleting an item, a confirmation dialog

In the previous project, we needed to decode the h264 video, use ffmpeg, and decode yuv. The best display method is to display the video through opengl es 2.0, if opengl es 2.0 is not used, yuv2rgb must be used to draw the image. I only know two

Problem description: Get a string from an XML file with the content about 262626. Now you need to convert the string to the MB (/1024) format. But cannot be converted to int or long integer. My test code: [Java]String size = parser. getValue (e,