[Android] ListView listens for sliding up and down (determines whether to display the return button on the top), android returns to the top
Set the scroll listener to determine the scrolling direction of the ListView and get the screen height and the actual ListView height, and determine whether to display the return button
This article for you to share the Android implementation drag selection button specific code, for your reference, the specific content as follows
Effect chart
View Code
First step: Custom Properties
Step Two: Customize the Circle
public class Circleview extends View {/** * default color * * Private final int default_color = Color.ltgray;
/** * Default RADIUS DP */private final floa
Android adds a button to exit the program and android exits.
package com.example.yanlei.yl;import android.graphics.Color;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.widget.TextView;import android.text.Html;import android.text.Html.ImageGetter;import java.util.regex.
In the Android Apidemo, there is a button merry-go effect, but the change is TextView, or a little difference.
Define MERRY-GO (Marquee), mainly in Project/res/layout/main.xml
Copy Code code as follows:
Android:layout_width= "40px"
android:layout_height= "Wrap_content"
android:text= "Test marquee for TextView"
android:layout_gravity= "Center"
Android:ellipsize= "Marquee"
Android:si
We often see in the application of the selection of the switch state of the configuration file, the project is to use the Android switch control, but it feels so ugly
Personally think it is better to customize, the first effect chart:
Implementation process:
1. Ready to switch the two pictures in different states into the drawable.
2.xml File Add code:
3, then declare the ToggleButton control in the Java file and instantiate it, ad
Custom ListView is required. Let's make floatdellistview here.
Replication Ontouchevent method. As follows:
@Override public boolean ontouchevent (motionevent ev) {switch (ev.getaction ()) {case Motionevent.action_d
own:
Floatdelbuttonlayou.java:
public class Floatdelbuttonlayout extends LinearLayout {
Above this Android ListView implementation of the iphone to implement the left-slip Delete
First, let's look at the running effect:
Program structure:
Code in the MainActivity file:Copy codeThe Code is as follows: package com. android. buttonpageflipper;Import android. app. Activity;Import android. graphics. PixelFormat;Import android. OS. Bundle;Import android
void onscrollchanged ()
{
int scrolly = mscrollview.getscrolly ();
if (scrolly
Some readers may ask why the first method is introduced, since there is such a simple way to set up listening directly. Careful you may have found that in the first method, I also callback the parameters representing the current callback state in the custom listener event, statue because many apps do not have the option of manually dragging the scrolling and inertia scrolling. For ex
Now, let's talk about the use of the single-choice button RadioButton control.
Although a single sequence is not as common as multiple selection boxes, it is still required in many cases.
Now let's take a look at how it works.
Step 1: Create a project Ep. Radio without renaming the view and activity.
Step 2: design the view in a simple way (after the previous study, I believe that you know which file the view refers to. That's right, activity_main.xml
Hello everyone, in this section, we will combine the simple button Event Response to display the application of the toast control. In the previous section, we have learned. the button object is defined in XML. Today we will learn how to implement event response for the button,
The event processing triggered by the butt
Many people have said that the button cannot use a custom click or select effect. Therefore, perform the following test:
The result shows that the button is very powerful.
You can use this flexible method.
Method 1
1. the selector. xml file placed under drawable
Android: drawable = "@ drawable/temp2"/>
2. layout file main. xml
The button is a very frequent component of Android development, primarily a button that is generated on the UI interface that the user can click and the button triggers an onclick Click event when the user clicks the button.First, Button introductionbutton is easy to use, yo
In ApiDemo of Android, there is a Button drive effect, but it is still a little different if it is changed to TextView.
Define Marquee, mainly in Project/res/layout/main. xml
[Html]Android: layout_width = "40px"Android: layout_height = "wrap_content"Android: text = "Test ma
Android custom control-ios-like button
When we develop client products in the company, we will find that the difference between android and ios is that ios has benefited from the elaborate design of "Old Joe", and the interface user experience has been superb. android adheres to the open-source idea, the hundreds of u
I have always wanted to write something, but I don't know what to write. I have been learning Android development. I just took this opportunity to practice writing. Well, let's say, today I want to learn about the Android Button control and TextView control. What ?? Do you still have to build an Android development pla
Android Demo --- how to extract the Button + rounded avatar of a rounded corner
Friends who often play apps know that there are many buttons on the App that are rounded. The circle is full and tense, I don't know if the partner who designs the rounded corner button has the same idea as xiaobian '(* ← _ ← *)'. Listen to the partner who developed IOS by xiaobian, t
Preface
As of this article, 12 Android APIs have been translated, two of which are provided by another member of the translation group. Although the translation workload is large and difficult, it is of great help to both yourself and others. If there is only one article, there are not too few, but more than 10 articles are not too much, once again appeal to everyone's enthusiastic participation in Android
Under Android, events occur under the listener, and the Android system responds to keystroke events and touch-screen events, and this article mainly introduces the button click event Method.
One, the realization button clicks the event the method
There are a number of ways to implement the
Solution to the Problem of incorrect item button listening in ListView in AndroidThis problem is often encountered during development. A list is created to add button listening events to each item in the list, however, when there is a lot of data in the list, the click error may often occur. We may all have our own solutions to this problem in the program, but you may be confused when you discover this prob
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