according to the user clicking on the letter*/Sidebar.setontouchingletterchangedlistener (NewItouchingletterchangedlistener () {@Override Public voidontouchingletterchanged (String cString) {intPosition =-1; if(Cstring.length () > 0) {Position=myadapter.getpositionforsection (cString. CharAt (0)); } if(Position! =-1) {listview.setselection (position); } Else if(Cstring.contains ("#") {listview.setselection (0); } } });Great length said so much, the effect of the
I wrote my own book "deep understanding of memory management for Android virtual machines". I don't just write and play, but I have a deep understanding of Java virtual machines.
Baidu Network Disk address: https://pan.baidu.com/s/1jI4xZgE
I named it memory management for an in-depth understanding of Android virtual machines. This book consists of two parts: th
Today I learned how to embed a video into an application using the Videoview class, as shown in the following code.1 Public classTestvideoextendsactionbaractivity {2 3 @Override4 protected voidonCreate (Bundle savedinstancestate) {5 Super. OnCreate (savedinstancestate);6 Setcontentview (r.layout.activity_test_video);7 8Videoview video =(Videoview) Findviewbyid (r.id.video);9Video.setvideouri (Uri.parse ("android.resource://com.example.gboy.testvideo/" +r.raw.video));Ten //An
. Net programmers play Android development-ListView Click Event
As we all know, ListView is used to display the data list. Each list consists of list items. If we click to select a list, what should I do if I want to get the details in the list or open a new window to pass the list information? This section demonstrates the click event of ListView. Through this section, we will have a deeper understanding o
We all know that the ListView is used to display a list of data, each list has a list of items, if we click to select a list, want to get the details of the list or open a new window to pass the list information in the past what to do? In this section we demonstrate the ListView click event, which we will have a deeper understanding of the ListView, first look atHere's a look at the demo codeMain layout fileList item Layout fileBackground codepublic class Listviewclickactivity extends Activity {
Android Play onLowMemory () and onTrimMemory ()
Today, I checked the LitePal framework source code of Guo GE. I just opened the LitePalApplication source code and saw this scene.
@Overridepublic void onLowMemory() {super.onLowMemory();mContext = getApplicationContext();}
I don't know much about Guo ge. I vaguely remember someone talking about onLowMemory () and onTrimMemory (). So I checked the source code
First turn on Tomcat on your computer and place the video file in Tomcat 7.0\webapps\rootNo need to modify the code, directly enter the address can be run as follows:To play online video, you must require your phone to support the current format before it can be playedHow playback works: Resources on a segmented download server go to the cache2.3 Version of the Android streaming media protocol support is no
Define music ButtonsMusicSRC attribute specifies the URL of the video to playThe Preload property specifies whether to load the video after the page is loaded. If the AutoPlay property is set, the property is ignored. The Loop property specifies that playback starts again when the video ends. Set this property, the video will loop back. the AutoPlay property is set to the video element that is automatically played: The AutoPlay property specifies that the video is ready to
Under the WebView of Android
HTML5 's video settings AutoPlay properties
Or use the Play method in document ready
Can't make it play automatically
This problem can only be resolved using the WebView onpagefinished method, as follows:
Copy Code code as follows:
Mplayer.setwebviewclient (New Webviewclient () {
AutoPlay when finished loading via J
Relative Layout relativelayoutis a more commonly used control in the Android layout that allows you to lay out layouts for various screen resolutions,Relativelayout the control property settings relative to the location. You can set the position of the control with the parent control, and the location between the control and the control.1. Control and parent container location propertiesAndroid:layout_alignparentleft= "true"child controls on left side
visibleARG2 indicates the number of visibleARG3 indicates the total quantityOnscrollstatechanged (Abslistview arg0, int arg1) indicates a rolling state changeIf the scrolling state ends, the data is loaded.3. Customizing the ListView binding DataAfter customizing the ListView creation, we create a demo to bind the data, first creating a layout file and an activity file Package Com.example.helloword;import Java.util.arraylist;import Java.util.hashmap;import java.util.List;import Java.util.map;im
The ListView in Android can swipe up and down, and the up and down activities can load data in pages, which we'll look at in the ListView scrolling event.The scroll events of the ListView are mainly implemented by the Setonscrolllistener listener, which consists of two methods Onscroll and Onscrollstatechanged methods, Onscrollstatechanged is mainly used to monitor the scrolling stateAdding data to the ListView during sliding, the ListView scrolls wit
Toast English name is toast, in Android This class is used to pop up the message, I think the SDK author thinks that the message is like a piece of toast. This theory does not have much to say, start our practice.First step, design pageMain Page Toastview.xmlandroid:orientation= "vertical" android:layout_width= "fill_parent"android:layout_height= "Fill_parent" >customizing Toast pages Customtoast.xmlXmlns:android= "Http://schemas.android.com/apk/res/
vertical control, three labels layout_height are wrap_content, when three labels by the height of the occupied space. The remaining space is allocated at layout_weight scale, because label 1 and label 3 do not have the Layoutweight property set. Defaults to 0, so the rest of the space is allocated to the label 2,???????????????????? Keep in mind that this time the TextView? android:layout_height= "Wrap_content"???????????? ?????????????????? 3.2? When we put three TextViewandroid:layout_height=
0, the use of Gallery reviewwe sometimes see a dynamic picture on an iphone or on windows, moving it with a mouse or a finger touch, creating a dynamic picture scrolling effect, and triggering other event responses depending on your click or touch. Similarly, this implementation is also available on Android, which is the implementation of thumbnail browsers on the UI via gallery.Let's see how gallery is implemented by first declaring the control from
all the controls in the frame layout framelayout are in the upper left side of the interface, and after the drawing space overrides the previous control, the frame layout is more likely to be used in game development. . NET programmer play to Android development---(10) frame layout framelayout
caveats:1, Textureview is the Android 4.0 after the addition of the lower version of this class. Textureview must work in an environment where hardware acceleration is enabled, in the settings of the activity in the configuration file: Android:hardwareaccelerated= "True" is the default property, so no more writing is required. But if you write false, you can see Onsurfacetextureavailable () This callback will not come in, Textureview no surfacetextur
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