Android development Note (17) data storage 2 file storage data, android file storage
Android provides five data storage methods:
1. SharedPreferences
2. File Storage
3. SQLite Database
4. ContentProvider
5. Network Storage
This document describes how to use files to store d
Use of Menu level 1 Menu and level 2 Menu of Android learning notes, and android learning notes
(1) No changes have been made to the layout file.
(2) the code in the main. xml file under the res -- menu directory is as follows:
(3) In the string. xml file under the values directory:
(3) The MainActivity. java code
Android interview question 2: why is there a message mechanism? Android interview message mechanism
In Android UI development, Handler is often used to control the interface changes of the main UI program. For Handler functions, we can conclude that it works with other threads to receive messages from other threads an
UID. Once found, the corresponding permission is indicated.2) If not found, then go to Packagemanagerservice.msystempermissions to find. This information is read from the/system/etc/permissions/platform.xml when it is started. This records some of the system-level application UID corresponding to the permission.3) returns the result.4.2, CheckUriPermission1. If the UID is 0, the description is the root user, then the permissions are not controlled.
) First it finds the list of permissions for the UID (that is, the package) by calling GETUSERIDLP, going to the PackageManagerService.Setting.mUserIds array, and depending on the UID. Once found, the corresponding permission is indicated.2) If not found, then go to Packagemanagerservice.msystempermissions to find. This information is read from the/system/etc/permissions/platform.xml when it is started. This records some of the system-level applicatio
Part 2 code verification
The verification code for various image transformations described in the first section is as follows. A total of 10 cases are listed. To verify a specific situation, you only need to comment out the corresponding code. Images used in the test:
Its size is 162x251.
For the results of each transformation, see the description after the code.
Package COM. pat. testtransformmatrix; import and
1. IntroductionThis analysis is a very simple program, is a primer on the introduction of anti-compilation tutorialMainly learn about the use of tools, the following is downloaded from the Internet test samplesTest Sample ex_05_01_.apkLink: http://pan.baidu.com/s/1sjOIXJn Password: 5uq42. First, use Dex2jar and Jd-gui to viewReference: Android Learning Tips (8)---Mac Dex2jar and Jd-gui use先提取apk中的classes.dex,使用dex2jar工具使用jd-gui打开classes_dex2jar.jar查看源
suitable to use InsetDrawable. For example, using this can solve the problem between our custom Dialog and the screen.I believe all the friends who have done this know that even if we set layout_margin, this is useless.You can use this InsetDrawable! You only need to set an insetXxx for InsetDrawable.Margin of the direction, and then set it to the background of the Dialog!
The related attributes are as follows:
1.
Drawable: The referenced Drawable. If it is null, there must be a Drawa
generated by R. Java cannot be modified.
|-Androidmanifest. xmlThe system list file of the android project controls the overall attributes such as the name, icon, and access permission of the android application.
The following is a list of my first applications:
Layout file activity_main.xml
This is a correlation layout relativelayout, where there are two texts, textview represents a text box.
The m
Android development skills 2: Implementation of custom log tool XLog, Android xlog
During the development process, printing logs is an essential part of debugging. However, directly using the built-in Log class does not meet our actual project requirements: if we are developing a relatively large project, there must be a lot of logs to be printed. When we get onl
J brother --------- interview Summary of Beijing Android recruitment companies 2, --------- android
I followed the previous article to write down the http://blog.csdn.net/u011733020/article/details/45998861, thank you very much in the previous article to me pointed out the problem of the brothers.
Interview company: wudaokou interview time: May 27 AM. interview
Path to Android Development 7-UI component 2
Today, we continue to learn about the UI components, mainly including TextView and EditText.
TextView component introduction:
Subclass:
Button, CheckdTextView, Cheronometer, DigitalClock, EditText
Indirect subclass:
AutoCompleteTextView, CheckBox, CommpoundButton, MultiAutoCompleteTextView
In its xml file, there are many attributes mentioned today, for example:
How to obtain android mobile phone contacts and display them in letters (2): android contacts
The following describes how to categorize and display contacts with the same initials:
In the adapter implement SectionIndexer
In this way, the adapter must implement the following three interfaces:
@ Overridepublic Object [] getSections () {// collection of sections} @
In-depth understanding of Android (2) -- Understanding JNI (medium) and androidjni in Android
Sunshine Xiaoqiang participated in the CSDN blog Star Selection, If you think sunshine Xiaoqiang blog is helpful to you, vote for Xiaoqiang: http://vote.blog.csdn.net/blogstar2014/details? Username = lxq_xsyu # content
In the previous article, we learned about the use of
Android callback function 2: application instance and android callback function
If you do not understand the android callback concept, see android callback function 1: Basic concepts.
1. Define Interfaces
package com.app.util;public interface ZYJCallBack { public void data
1. Example description
Since Android 3.0, Android has introduced actoinbar. It must be said that before Android 3.0, the title bar of Android is really ugly and there is no function yet.
In the past, the top columns of many applications were similar to Apple, for example. With the release and gradual expansi
This article describes the Android programming interface to achieve Full-screen display method. Share to everyone for your reference, specific as follows:
In the development of Android applications, we will encounter some of the interface to set up a full screen format, there are two ways to implement. One is implemented in Java code, and the other is implemented in a configuration file.
1. Set in Java co
Develop an android driver that can count words (1)
5. Specify Driver-related information
Although it is not necessary to specify this information, a complete Linux driverProgramThe driver-related information is specified. You must specify the following information for the Linux driver.
1. Module Author: specified using module_author macro.
2. Module Description: Use the module_description macro to sp
Android interview questions (2) and android interview questions
1. What is the difference between int and Integer?
Java provides two different types: The reference type and the original type (or the built-in type ). Int Is the original data type of java, and Integer is the encapsulation class provided by java for int. Java provides encapsulation classes
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