B's menifest file to declare the use of the appropriate permissions, App B sends the message, a is not received.In addition, you can also add android:protectionlevel= "signature" When declaring permissions in App B's Menifest file, specifying that app B can only receive messages sent by apps signed with the same certificate.The mutual invocation of data between
loadingBefore studying gallery, we would appreciate the overall effect of gallery, as seen in Figure 1-1:Figure 1-1First, let's take a look at the history of Gallery, before Android2.3 the Android system's "gallery" named Gallery3d, After Android2.3, the system changed the
There are four ways to implement the composite controls of image and text. The first method is to use Gallery.
Part 1: Create a layout file to add text to images. The name is pic_text.xml and the content is:
Part 2: Layout file of the entire program, that is, a gallery:
Part 3: Main Program:
Package Yan. guoqi. testgallery; import android.
location and password for the keystore export, and remember the password. It will be used in the next use existing keystore.Step 3: Enter the keystore information, password of some APK files, expiration time, and organization unit information.Step 4: generate an APK file with a signature, and this will end.Step 5: Use the previously generated keystore to sign the next release.
Step 6: Next, next, end!
Meth
to compile Java, make sure the system is using the Keytool in the JDK, not the GCJ. If Keytool is already in path, it may be a symbolic link to/usr/bin/keytool. In this case, check the target of the symbolic link to make sure it is pointing to the keytool in the JDK.
If you want to publish your application, you also need the Jarsigner tool. Both Jarsigner and Keytool are included in the JDK.
Signature in debug modeThe Android compiler tool provides
app Cottage Crazy Love encryption APK encryption platform anti-cracking, Android system because of its open source, now occupy the global Smart machine near 80% WP system and Apple's ios system. However, it is also due to open source, android piracy app
How to slim down your Android Installation File (APK)
It is an indisputable fact that the apk file of Android is getting bigger and bigger. In Android or the original version, the apk file size of an
How to slim down your Android Installation File (APK) and androidapk
Source Address: How to slim down your Android Installation File (APK)
It is an indisputable fact that the apk file of Android is getting bigger and bigger. In
As an Android developer, the job is to decompile others ' apk, of course, the main purpose is to learn more, take the long, make up for the short. Let's summarize some of the knowledge about Android Decompile and two packaging today. First of all, the purpose of this article is to explain the principles and methods of decompile and two-pack by example, and then a
A lot of people have appeared java.lang.RuntimeException:Unable to instantiate activity componentinfo{*****activity}: Java.lang.ClassNotFoundException:Didn ' t find Class "*****activity" on path:/data/app/*******.apk error, in Android development, I also encountered this problem, tangled up for two days, finally resolved, combined with my own online to find, is n
The apk file is actually in the zip format, but the suffix name is modified to APK, after decompression through unzip, you can see the Dex file, Dex is the full name of Dalvik VM executes, that is, Android Dalvik execution program, not Java The bytecode of me is the Dalvik byte code.Since the APK file itself is a compr
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.