In a project, we may need to use the same layout design. If they are all written in an xml file, the code is redundant and the readability is poor, therefore, we can write code with the same layout into a single module, and then use the
App_title.xml:
Copy codeThe Code is as follows: Android: background = "@ drawable/bt" xmlns:
Gesture used in ViewGroup
The Gesturedetector class allows us to quickly handle gesture events such as clicks, slides, and so on.The use of Gesturedetector is divided into three steps:1. Define Gesturedetector Class2. Initialize gesture class, simultaneously set gesture monitor3. Hand over the touch incident to gesture for treatment
Let's take a look at how to use it, followed by an example:
Package
Original: http://www.cnblogs.com/rayray/p/3382087.html
On the basis of writing the Android custom button example, if you want to specify the font size to produce this effect:
In fact, you do not need to customize variables, you can directly use the configuration properties of TextView:
Android:layout_width= "Fill_parent" android:layout_height= "Fill_parent"android:layout_weight= "1" android:text= "movie"An
Notification Notification = new Notification ();
Set notification message icon Notification.icon = iconID;
Set the content that emits the message Notification.tickertext = Tickertext;
Set the time to send notification Notification.when = System.currenttimemillis (); Sets the default sound, vibration, and light effects when a notification is displayed notification.defaults = notification.default_vibrate;//vibration//Notification notification =
New Notification (R.drawable.ic_launcher,
Although Android offers a variety of components for small, reusable interaction elements, you may also need to reuse a large component for the layout. To efficiently reuse the full layout, you can use the
The reuse layout is very powerful because it allows you to create complex layouts that can be reused. For example, a Yes/no button panel, or a custom progress bar with descriptive text. This also means t
(websettings.load_cache_else_network);
There are some attributes I will not speak out, interested in the search for their own.
Four, download the file
WebView sometimes contains links to downloaded files, and the files are downloaded to the local area after clicking the link. How to achieve it? The system provides us with a download interface Downloadlistener, the code is simple and convenient.
We simply write a class that implements this interface and overrides the method, invoking the
There are situations where you need to map the same type to a different class implementation, or use an example of a drawing.
IShape, Rectangle, MyRectangle, MySQUARE, have the following inheritance relationship:
We may need to map ishape to both MyRectangle and MySQUARE, which can be implemented using binding Annotation. The use of types and annotation (callouts) can uniquely determine a binding. The T
In the previous example, the Android Roboguice use Guide (4): Linked bindings for simplicity, defining MyRectangle and MySQUARE defines a constructor that takes no parameters, such as MyRectangle, as follows:
public class MyRectangle extends rectangle{public
myrectangle () {
super (50,50,100,120);
}
public myrectangle (int width, int height) {
super (50,50,width,height);
}
You can actually
Use of Animations in android Development (IV)Use of Animations in android Development (IV)This blog post focuses on the use of animation in layout. This document uses the ListView control as an example.There are two methods to implement layout,The first is to directly
First, Introduction
I believe you will use the Eclipse simulator to feel very slow card, here to introduce a good thing Android simulator genymotion. For more information, you can https://www.genymotion.com/to this website.
Second, install Genymotion
1, Registered genymotion login account
Enter the site https://www.genymotion.com/, you will find that requires registration before downloading the installa
Preface: Otto Event Bus-the communication framework between components for the previous situation between the activity or fragment between the jump value is generally used bundle, intent, etc., from Activitya--- Activityb with StartActivity, with Startactivityforresult () can accept the latter to the former parameters and can do some updates UI and other operations. This is to determine which of the buttons from a jumps to B, set a unique identifier to define what frist=1,fffff=2 and so on. The
Android studio was released around the 15th, which made the programmers very happy. I also downloaded it and installed it immediately. Many difficulties were encountered during this period. The summary is as follows:
1. Unable to run.
The tragedy is that XP cannot be run in my house. Later I read other people's articles (I'm glad that someone has written my thoughts so soon) to find out the reason, but the main reason is:
You need to add the android_h
Broadcast Receiver Introduction
Broadcast receiver is one of the top five components of Android and is used very frequently.
Used for asynchronous reception of broadcast intent, broadcast intent sent by calling Context.sendbroadcast (), broadcast Receiver (BROADCASTRECEIVER) to receive broadcast intent asynchronously, The broadcast intent is implemented by calling Context.sendbroadcast (), Context.sendorderedbroadcast (), or context.sendstickybroadca
Most of the people who might have developed Android have used many open source components that have been pulled down, but today the official V4 support Package Swiperefreshlayout feel pretty good, especially to share.
Brief introduction:The Swiperefreshlayout component accepts only one subassembly: that is, the component that needs to be refreshed. It uses a listening mechanism to notify listeners owning the component that a refresh event is occurrin
The android's own pattern and Matcher are used hereSince the last source that we have got is in result, we can use it directly.Directly on the codePattern p = pattern.compile ("Regular expression"= p.matcher (result); while (M.find ()) { = m.tomatchresult (); for (int i = 0; i ) {System.out.println ("I" + ":" +Mr.group (i). Trim () ); } }Logcat the data that was heard in the stopAndroid "Shanxi illegal query Implementation 3"
There are two ways to implement asynchronous task mechanisms in Android, Handler and Asynctask.
Handler mode needs to create a new thread for each task, after the completion of the task through the handler instance to the UI thread to send messages to complete the interface update, this way for the entire process of control is more subtle, but also has disadvantages, such as the relatively bloated code, in the simultaneous execution of multiple tasks
attention. If the data returned by the interface tells the client that there is a differential file download, the client uses the child thread download, then performs the incremental update of the merge interface, and then generates the new APK installation package, which completes the incremental update process.
Effect
First install the app_1.1.apk version of the installation package to the phone, this package is equivalent to your published online version 1.1.
Then put the difference file
It's a simple question, but it's always a bit of a problem to use after a certain amount of time. Here is a note of the Logcat steps:
1, in the activity to affirm the tag variable (name is actually casual, as follows:
private static final String tag= "Yan";2, when you need to use Logcat output information:
LOG.I (Tag, "screen width:" +display.getwidth () + "screen height:" +display.getheight ());3, doub
1. Introduction
Recyclerview is a new view group with the goal of providing similar rendering for any adapter based view. It is used as a successor to the ListView and GridView controls and is supported in the latest SUPPORT-V7 version. The Recyclerview architecture provides a plug-and-pull experience, highly decoupled, unusually flexible, and itemanimator achieve stunning results by setting the different layoutmanager,itemdecoration it offers.
In short, ListView and the GridView can do the Re
This tutorial for you to share the use of the Android Calendar library for your reference, the details are as follows
Mainactivity.java Code:
Package siso.weekv;
Import android.content.Intent;
Import android.support.v7.app.AppCompatActivity;
Import Android.os.Bundle;
Import Android.view.View;
public class Mainactivity extends Appcompatactivity {
@Override
protected void OnCreate (Bundle Savedi
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