The html data in loadData () cannot contain '#', '% ','\','? '4th special character. If this character is displayed, A parsing error occurs, indicating that some html code is not found on the webpage. What should I do? We need to encode UrlEncoder
In Android, string-array is a simple method for extracting XML resource file data. Example: Put the corresponding data in the arrays. xml file in the values folder. Copy codeThe Code is as follows: Xiamen Fuzhou Quanzhou
1) how to obtain a MediaPlayer instance:You can use the new method directly:MediaPlayer mp = new MediaPlayer ();You can also use the create method, such:MediaPlayer mp = MediaPlayer. create (this, R. raw. test); // you do not need to call
In android, the help, about, and author prompt pages are frequently used. Pages like this: This page can be designed through the AlertDialog dialog box.Design an AboutDialog class to inherit from AlertDialogCopy codeThe Code is as follows: public
Background:When Android is started, it sends out a system broadcast with the content ACTION_BOOT_COMPLETED. The constant of the string is android. intent. action. BOOT_COMPLETED. Just "capture" the message in the program and start it again You can.
1. dip: device independent pixels (device independent pixel ).Different devices have different display effects, which are related to the hardware of the device. We recommend that you use this function to support WVGA, HVGA, and QVGA without pixels.
During Mobile Phone development, some time-consuming operations are often encountered. At this time, the progress bar will start to work in handy. This demo shows the ProgressBar progress bar and ProgressDialog progress box. 1. ProgressDialog
The biggest headache for programmers is bug and debug. This debug lasted 20 days, and I made a failover. Tired, because of Android compatibility, different mobile phones may have different bugs, and it is difficult to reproduce, So I went online and
If you have used multimedia applications, you will be troubled by how to obtain multimedia files in the SD card. Android is still very powerful. If you know how to call the android api, everything will be okay. When a mobile phone or simulator is
Android provides three fonts:" Sans"," SerifAnd Monospace". 1. Set the font in the Android XML fileAndroid: typeface can be used, for example, android: typeface = "monospace ". In this example, android: text = "Hello, World! Hello, there are four
Copy codeThe Code is as follows: W/ResourceType (756): Failure getting entry for 0x7f020004 (t = 1 e = 4) in package 0: 0xffffffb1 D/AndroidRuntime (756): Shutting down VM W/dalvikvm (756): threadid = 1: thread exiting with uncaught exception (group
During android development, the onConfigurationChanged event is triggered when the screen changes from Portrait evaluation to landscape evaluation by default. By default, the screen is reloaded and the screen is the same as the landscape evaluation,
I have encountered some problems in the display of images recently.1)You can use ImageSwicher and ImageView in combination, so that setfecloud () is used.The worst thing is that if the image size exceeds the screen size, it is difficult to implement.
Android horizontal and vertical screens should solve two problems: one. Layout problem; 2. Reload.1. layout problems:If you do not want the software to switch between the horizontal and vertical screens, the easiest way is to do so in the
This document uses Matrix to scale and rotate images in Android. The sample code is as follows: Copy codeThe Code is as follows: package com. android. matrix; Import android. app. Activity; Import android. graphics. Bitmap; Import android. graphics.
This article mainly explains how to use Matrix in android to control the rotation, scaling, and movement of images. For details, refer to the Code: Copy codeThe Code is as follows :/** * Use a matrix to control image movement, scaling, and Rotation *
We all know that we need to simulate GPS on the simulator during development, but the Location is always null. After checking the internet, we found the following solution: Solutions for online heroes:When obtaining GPS information on the simulator,
1. Question proposal 1) Why multithreading is required? 2) How to Implement multithreading? 3) What is the core of the multithreading mechanism? 4) How many implementation methods are there? 2. Problem Analysis 1) The essence of Multithreading is
MainActivity is as follows: Copy codeThe Code is as follows: package cn. testgethandsetinfo; Import android. OS. Bundle; Import android. text. TextUtils; Import android. widget. TextView; Import android. app. Activity; Import android. content.
MainActivity is as follows: Copy codeThe Code is as follows: package cn. testmediametadataretriever; Import java. io. File; Import java. io. FileOutputStream; Import android. media. MediaMetadataRetriever; Import android. OS. Bundle; Import android.