Android

When debugging a mobile phoneProgramWhen an error occurs, we can get the error message, When we use a real machine for Android Application debugging, we cannot obtain the debugging information. The error message is as follows: Unable to open log

No meaningful files were left during project packaging and obfuscation, resulting in crash logs reported by the operations team (the most typical is Google Play ), It is difficult to locate the problem because many of the logs are obfuscated

1. Generate a keystoreLocate the position in the JDK binfile and enter the following name line: Keytool-genkey-alias changebackgroundwid get. keystore-keyalg RSA-validity 20000-eystore changebackgroundwidget. keystore Do not wrap the

How do I download network files to a local device? Simply put, it is the same as copying and pasting files locally, that is, copying the content in the files on the network to your local file to download the files. Andoird ApplicationProgramTo

When adding text in textview, you sometimes need to change the color of some text fonts. Today I learned three ways to share them: 1. Set the font color directly in the configuration XML file under the layout file, and change the color by adding

Simply following Google's official online documentation can't build the android kernel source easily, here are some notes to build it succeed, all is from my own experiments and testing. 1. "elf XXX" error as below: The solution is about

Android applicationsProgramThey are all developed in Java. Android ndk enables us to use C/C ++ native development on AndroidCode. There are two reasons to use ndk: one is to rationally reuse existing code, and the other is to improve the

Hi everyone! Today, we mainly learn about the data storage mechanism of Android. There are four main methods. Today we will introduce shared preferences, files, and network. Next we will introduce the SQLite method. As an example, it is easy:

My first project tutorial was successfully completed. This article will share ideas and some of my experiences with you. During the study period, do not just relax yourself after completing the project during the improvement phase. Make sure to

  A small Android project-the calculator uses the same event listener to complete addition, subtraction, and multiplication A small Android project --- checkbox calculator (with source code) How to install the SDK on a mobile phone Android

In Android, autocompletetextview can automatically complete text input boxes, which is a bit like Ajax in Web pages. When using this function, you need to specify an adapter to set the completion. XML version = "1.0" encoding = "UTF-8" ?>

In this topic you will learn some information about android process management. First let's take a look at the launched processes during Android booting. User PID ppid vsize RSS wchan PC name Root 1 0 264 176 c00acc6c unzip c36c S/init Root 28

Here we useRFCOMM is a simple serial linear simulation protocol that provides RS232 control and status signals. That is, a serial port (COM) transmission protocol with a baud rate of BITs and 8 bits. Therefore, mobile phone Bluetooth can

As described in the title, learn how to open the camera and preview images on the screen. Steps for using camera:(1) Call the open () method of camera to open the camera;(2) Call the getparameters () method of camera to obtain the camera parameters.

the principle of lyrics synchronization is actually very simple: the lyrics are displayed in a thread, which synchronizes the display progress and playback progress of the lyrics during music playback. the standard network lyrics are LRC. Let's

Player. xml and objectactivity are the most important items in this project. The first is the layout of the player control. At first, I tried to use various la s to achieve the effect I wanted, because the progress display I used is a custom

In Android, the time and date controls are relatively rich. Datepicker is used to set the date input and timepicker is used to set the time input. Datepickerdialog is used to display the date dialog box and timepickerdialog is used to display the

One Android app Program It is mainly to set the scene mode on a regular basis, so we need to call the flight mode through programming. After searching, we cannot find the relevant explanations and descriptions, finally, I saw a solution on a

 [Software introduction] Product Name:Superlock 2.3 Beta Application Introduction: Superlock is a lock screen and security protection program on the Android platform. after starting the program service, you can enable the protection function when

Public static final String BROADCAST_PACKAGE_REMOVED Allows an application to send a notification that the application is deleted. Constant Value: "android. permission. BROADCAST_PACKAGE_REMOVED" Public static final String CALL_PHONEAllow an