Android

Today, in the android project, you need to implement a GPS or network function to obtain the longitude and latitude of the current mobile terminal device. To implement this function, you must use the locationmanager class in the android framework.

Many applications need to add application promotion statistics. If the application generates packages from different channels one by one, the efficiency is low, and the distribution channel may be mistakenly mistaken, you can use ant to generate

WebView is a good thing. It serves as a mini browser and adopts the Webkit kernel. Therefore, it supports html, javascript, css, and so on perfectly. Sometimes, we can hand over the UI and even data processing to WebView, and cooperate with PHP and

PopupWindow is displayed in the pop-up window under the android. widget package. The official document describes the control as follows: "A pop-up window control can be used to display any View and will float the top of the current activity ".

The android. app package contains an ActivityGroup class, which is the Activity container and can contain multiple nested Activitys. This article uses the ActivityGroup function to nest the Activity to implement the Tab function. The tab UI can be

When a component of the Program is started, if no other component in the program is running, the Android system will start a process and a thread for the program. By default, all components in the same program run in the same process and thread

The Android system will maintain a program process for as long as possible, but when the system resources are insufficient, after all, the system will kill some old processes for some new or more important processes to release the memory. The system

Keep a record, which does not correspond to the province. For Android 4.0 Code: IceCreamSandwich API Level: 14 For Android 2.3 Code: Gingerbread API Level: 9. For versions 2.3.3 and later, the API Level is 10. For Android 2.2 Code:

Android applications are limited to a maximum of 16 MB of memory, at least on T-Mobile G1 (of course there are hundreds of megabytes of memory available now ). It includes two parts that the phone itself occupies and can be used by developers. Even

LoadDataWithBaseURL (baseUrl = null/"about: blank ",......), BaseUrl is null or "about: blank" specifies the relative path.WebView mainly calls three methods: LoadUrl, LoadData, and LoadDataWithBaseURL.1. LoadUrl directly loads webpages and images

Friends of the attribute ApiDemo should know that in android2.0, we can easily implement the animation switching effect between activities.After startActivity, you can call overridePendingTransition (int enterAnim, int exitAnim) to implement

ExpandableListView, as its name implies, is a scalable ListView. It can be used to implement menu settings and other functions. The project was used some time ago. Now I want to share with you the implementation method of ExpandableListView. First:

We know that many software products have an interface for setting menu items, such as moji weather. When there are many options in the settings, we can choose to use listview. The layout file is as follows: Simple: Only one listview Item layout:

Private arraylist getallcontacts (){Arraylist arraylist = new arraylist (); Phonemap = new hashmap ();// Obtain the local contactCursor cur = getcontentresolver (). Query (Contactscontract. Contacts. content_uri,Null,Null,Null,Contactscontract.

Address: http://developer.android.com/training/advanced.html Advanced Training contains a variety of classes that teach you best practices in Android development. These classes simplify the steps required to enhance your app with powerful platform

I continued to look into Android's new Overscroll functionality introduced in Gingerbread and discovered some more interesting things. the functionality to make a view scroll beyond its limits and then bounce back (almost exactly like iOS) is sort

SharedPreferences is a lightweight storage class on the Android platform. It mainly stores some common configurations, such as window status. Generally, reload the window status onSaveInstanceState in the Activity and save it using SharedPreferences,

// The service is in the same process as the visitor, so it is called the local service // Visitor: package cn.com. localquery; import cn.com. service. ILocalQuery; import cn.com. service. localQueryService; import android. app. activity; import

package cn.c;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.os.Bundle;import android.view.Display;import

MainActivity is as follows: Package cn. c; import java. io. file; import java. util. arrayList; import android. app. activity; import android. gesture. gesture; import android. gesture. gestureLibraries; import android. gesture. gestureLibrary;