Problem description: an image is displayed when it needs to be displayed; otherwise, it is hidden. When an image is hidden, no layout control is used. When the image is displayed, all the la s of the image are moved down sequentially. :
Click the button to display the image. Click again and the image disappears.
Solution:
View visibility allows you to view information online.
Use the property
By default Mac Hidden File And the finder does not provide Set Whether to show the options for hiding files, unlikeWindows There is a "folder option" setting Interface But this does not mean that the hidden files cannot be displayed in the Mac. Command The command is as follows:Display: Defaults write com. Apple. Finde
environment. For details about the NaviteActivity development process, refer:Http://api.apkbus.com/reference/android/app/NativeActivity.htmlThe execution logic of viruses in this development mode can be divided into two parts:1. DEX loader libdexloader. so: Implements decryption and dynamic loading of Payload DEX files.2. Payload DEX: executes malicious behavior
When setting the input password box, you may need to click to control whether the input is "plain text" or "dark text ".
Here, we provide a method for Android to dynamically display and hide the content of the password input box:
The password is hidden or displayed by setting the setTransformationMethod () method of EditText.
Java files
Package com.
Android learning route (3) run your Android app, route android
If you have created your Android project according to the previous lesson, it contains the default "Hello World" source file, allowing your project to run immediately.
How do you run your application? Two things:
Accessing hidden System Service APIs in Android
From: http://blog.codetastrophe.com/2008/12/accessing-hidden-system-service-apis-in.html
Android's SDK allows developers to do a lot with the platform, but there are some interesting capabilities of the system that aren't accessible through the public API. it's still possible to access these capabilities with a litt
Brief introduction:This article describes how developers ' apps use media storage services (including Mediascanner, Mediaprovider, and media information parsing) in Android, and how to update the app's new or modified files to the media database, How to hide the files generated by the app in the multimedia application,
install the driver, see OEM USB driver files.2. Enable USB debugging on your device. ? On more devices running Android 3.2 or older, you can find the option under Settings > Applications > Development.? On Android 4.0 and newer, it's in Settings > Developer options.Note:on Android 4.2 and newer, Developer options are
Many APIs of the Android SDK are hidden and I can't use them directly. But we can get the complete API library by compiling the source code of the Android system. After compiling the Android system source code, you can have all of its API libraries (JAVA) in the Out\target\common\obj\java_libraries directory. Of course
Many APIs of the android SDK in my blog are hidden and cannot be used directly. However, the complete api library can be obtained by compiling the Android system source code. After compiling the Android system source code, all its API libraries (Java) can be found in the out \ target \ common \ OBJ \ java_libraries dir
. This allows most of the RAM pages to be allocated to the framework's code, while allowing RAM resources to be shared across all processes in the app.
Most of the static data is mmapped into a process. This not only allows the same data to be shared between processes, but also allows it to be paged out when needed. For example, the following types of static data:
Dalvik code (placed in a pre-linked. odex file for direct mapping)
The API to adjust brightness after Android 1.5 is hidden, but there are still ways to do it in the Android source code, as follows:
Copy Code code as follows:
Ipowermanager power = IPowerManager.Stub.asInterface (ServiceManager
. GetService ("power"));
if (power!= null) {
Power.setbacklightbrightness (brightness);
T
About Android ProjectsA project is a container for saving source code and resource files.The Android SDK tools provided by Google can only be compiled and packaged for projects with a fixed directory structure. It is therefore highly recommended to create an Android project using Eclipse + ADT or Android commands.You c
Http://blog.sina.com.cn/s/blog_5da93c8f0101e1yj.html The main thing this article introduces is to implement the use of the hidden API by importing the fully compiled Classes.jar package. This approach is simple and programmer programming is simple, just as the hidden APIs become visible in the SDK. Its disadvantage is the compatibility problem, I hope users pay attention to, in the use of a clear considerat
Xirihanlin 2011.06.07
Original path: https://devmaze.wordpress.com/2011/01/19/using-com-android-internal-part-5-summary-and-example/
To be able to use internal and hidden APIs, You need:
1. Create a custom original-android.jar that contains all. class files
2. Create a custom Android platform to use original-an
;
However, it is strongly recommended that you do not do this. The classes or methods hidden by others are definitely not safe. If you release @ hide, some unexpected program errors may occur.
2. Use the reflection mechanism to use the @ hide method. This method is good and easy to understand on the Internet. You need to search for it on the Internet.
Www.bkjia.com
3. Modify system files
3.1 modify the
Hide requirements for application functionality
Applications on Android devices are divided into system applications and user-installed applications. The system application can not be deleted, but some users do not use the system and can not be deleted, "the eye is not clear", you may use the hidden function to hide it. Some applications may not want to be used by others (people who want to play with your
been discovered, but before this has been too many Android users "injured."The latest statistics from Google show that 34% of Android devices use different versions of Android 4.1. Google has said that Android devices have more than 900 million global activations, and that at least 300 million users around the world a
First look at the general way to hide the status bar:
Method One:
@Override
protected void onCreate (Bundle savedinstancestate) {
super.oncreate (savedinstancestate);
Remove TITLE
requestwindowfeature (window.feature_no_title);
Remove the status bar
GetWindow (). SetFlags (WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
Setcontentview (R.layout.video_view);
Initview ();
}
Pit 1: The code in the above setting hides the top status bar must be
During development, we found that some classes were hidden with the upgrade of the Android version. Very worried. Someone proposed on the Internet to put the code into the source code environment for compilation, which is a bit difficult for me. First, there is no source code environment. Second, it is difficult for me to compile it. With the help of the powerful Internet, I found a method. Is to use the re
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