android application package hash

Android Application SignatureSign Android applications The Android app uses its package name as a unique identifier. If two apps with the same package name are installed on the same mobile phone, the apps installed later will over

package. This is to use the jarsigner tool. For example, if we have a androidprogram package calendar.apk, we can use the generated testCA to sign the modified package. Jarsigner-keystore testCALib calendar.apk testCA. Android digital certificate Overview: Android requires

int foo.access$100 (foo foo) { return foo.mvalue; } static void foo.access$200 (foo foo, int value) { Foo.dostuff (value); } The inner class calls these static methods in any external class where you need to access the Mvalue field or the Dostuff method. This means that the code will attribute direct access to member variables to access via accessor methods. As mentioned earlier, how accessor access is slower than direct access, this example shows that some language conventions cause an i

string resource file;Styles. xml style resource file;Bin directoryBIND is used to store and generate target files, such as Java binary file packaging resource file (.apk suffix) and Dalvik Virtual Machine executable file (. dex suffix)Gen directoryGen is used to save Android to automatically generate an R. java configuration file. AndroidManifest. xml (list file of the Android

Android from hardware to application: step by step to step 6, android step by step Create an Android Application Project: Use the Android plug-in ADT of Eclipse to create an Android pro

We can see that many Android applications have the automatic update function. You can update the software with one click. Thanks to the software package management and installation mechanism of the Android system, this function is quite simple to implement. Let's take a look at it. First, the interface effect is provided: 1. Preparation knowledgeThe version ID o

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;publ

between NEON and SSE on the C/C ++ Layer Conclusion NDK Overview Native Development Kit NDK is a powerful tool that combines the powerful features of native x86 code with the GUI of Android * applications. By using this tool, developers will be able to improve the performance of some applications, but at the same time, developers also need to be very careful, because in some cases cannot achieve the expected results. NDK is dedicated to sup

Android Application Signature This article mainly introduces the theoretical knowledge of Android Application signatures and how to publish Android applications. 1. Concept of Signature It is a well-known signature in daily life. It represents a special mark of a person and

Before introducing the program implementation, let's look at the basics of activities and tasks in Android. As we all know, one activity can start another, even if it is defined in a different application, for example, if you want to show the user a map of information, there is already a task that can do this, So now all your activity needs to do is put the request information into a intent object and pass

indicates that the Service and UI (Activity) are not executed in the same process, but are executed in different processes. 2. The Android Application starts and stops the Service in the Activity. 3. The override onStart () method is started in the Service to execute the desired background function. 4. When the onDestroy () method is stopped, the background function is stopped. The specific implementation

started with Android development, but it will also involve some other elements that already exist in the application structure. In today's article, we will not discuss these additional elements in depth. All in all, learning about the basic creation knowledge of Android applications is the teaching task we need to complete today. 1. Source Step 1 Open Eclipse an

). Now let's take a look at how to use this application context. You can use context. getapplicationcontext or context. getapplication to obtain the application context. Note that we only obtain the context object, and the more ideal method is to obtain the object of a class. OK, just do it. The following defines a class. Package net. blogjava. mobile1; Import