best audio format for android

Android debugging tool-mat I. Overview For large Java applications, it is difficult to block all the vulnerabilities even if we perform a lot of effective work in the test phase, many problems will still be exposed in the production environment, and it is difficult to reproduce in the testing environment. The JVM can record part of the running status of the system when a problem occurs and store it in the h

Memory leaks are frequently encountered in Android development, and the Android system has a certain memory limit for individual apps, which can be obtained by:ActivityManager am = (ActivityManager)getSystemService(Context.ACTIVITY_SERVICE);int memoryClass = am.getMemoryClass();The Momeryclass value in the above code can be used as the memory limit for each app. This value is different depending on the devi

, and there are different versions of Android that are generated. Hprof are slightly different, and the version I'm using is 2.1, and the ways to generate the. prof file in each version can be found in:Http://android.git.kernel.org/?p=platform/dalvik.git;a=blob_plain;f=docs/heap-profiling.html;hb=HEAD.1. Open Eclipse and switch to the DDMS perspective, confirming that the devices, heap, and logcat views are open;2. Link the phone device to the compute

. hprof fileThere are many ways to build a. hprof file, and there are different versions of Android that are generated. Hprof are slightly different, and the version I'm using is 2.1, and the ways to generate the. prof file in each version can be found in:Http://android.git.kernel.org/?p=platform/dalvik.git;a=blob_plain;f=docs/heap-profiling.html;hb=HEAD.1. Open Eclipse and switch to the DDMS perspective, confirming that the devices, heap, and logcat

Today I'm going to focus on an error I encountered when I used the mat tool to parse a fileError opening heap dump ' a.hprof '. Check the error log for further details.Error opening heap dump ' a.hprof '. Check the error log for further details.Unknown HPROF Version (JAVA profile 1.0.3) (java.io.IOException)Unknown HPROF Version (JAVA profile 1.0.3)The reason: The Android virtual machine exported the memory

Http://ttlnews.blogspot.com/2010/01/attacking-memory-problems-on-android.htmlThis article was written in January 2010, some of which are already unsuitable for the android mechanism now.I've divided the memory issues into two types: oom and Stack OverflowThe maximum heap memory that an Android process can allocate (heap memories) is 16M (now different from custom versions of

For Android, this handheld device usually does not have too much memory, and the average user does not restart the phone for a long time, so write the program must be very careful use of memory, as far as possible to avoid the problem of memory leaks. Usually the problem of potential memory leaks in the analysis program is a very difficult job, usually by the team of senior engineers responsible, and as the program code volume increases, the difficult

Error opening heap dump ' a.hprof '. Check the error log for further details.Error opening heap dump ' a.hprof '. Check the error log for further details.Unknown HPROF Version (JAVA profile 1.0.3) (java.io.IOException)Unknown HPROF Version (JAVA profile 1.0.3)The reason: The Android virtual machine exported the memory file Hprof file format is not the same as the standard Java hprof file format standard, the root cause of the virtual machine inconsist

, several tests were performed for the application, mainly to see the memory usage before the program runs and the memory usage after the program ran:Before use:After use:Through the above data can be seen, before the program run data object is allocated on the heap is about 180KB, and the memory after the run about 300KB floating, did not present a significant rise in the situation, so there is no obvious memory leak, basically did not lead to the possibility of oom.However, it can be found tha

heap, which is the actual memory size of the application, which becomes smaller after the resource is reclaimed· See the heap data before and after the operation to see if there is a memory leakRepeated operations on a single operation, such as adding a page, deleting a page, and if the heap size has been increasing, there is a hidden memory leak.1.2 Analyzing the memory heap with the matDDMS can dump the current memory into a hprof format file, MAT

); Shader Mrectpaint.setshader (mlineargradient) added to the brush; @Override protected void OnDraw (Canvas Canvas) {Super.ondraw (Canvas); double mrandom; float currentheight; for (int i = 0; i Complete code for the layout file: The above is a small series to introduce the Android audio bar effect (imitation audio animation without listening

In the basic concept of Android performance optimization (a)---the four references to Java, speaking of Gcroot, the second memory monitor to detect the leak only said Menmery monitor use, this blog talk about mat to look for memory leaks, In contrast, theMemory Monitor is not as strong as the mat, but before starting the introduction of the

again, that is problematic! Indicates that an object in the activity class has been holding the activity instance without releasing it, so it is time to check the code in the activity!The above is Strictmode console information, so how to use the mat tool?Then go to the DDMS management interface,, find the device, open the Debug app, and in the thread of the heart, find the corresponding app process, figure:Click the Update heap on the toolbar to upd

files1. Open the Ddms view2. Select the package name that you want to analyze, the current demo is Com.android.updater, and then click the Update Heap button3. Click the Cause GC button in the heap view to determine when to listen5. Save the memory HPROF file and click on the "Dump HPROF" button, which is a button with a downward red arrowfour using the mat plugin to open the Hprof file1. If the mat is alr

This article explains how to use the Mat tool to find memory leaks (as an example of androidstudio development tools), using the memory analysis examples in the "Android Development Art Quest" book.1. Download the mat (Eclipse Memory Analyzer) tool, WINDOWS64 bit network: Http://pan.baidu.com/s/1pLlbOBD, or download it via official website: https://www.eclipse.or

C ++ opencv project porting to Android (Mat-"IplImage *) Recently, many problems have been encountered when porting the pedestrian detection C ++ project on the PC to the Android platform. Therefore, some important points have been recorded.1. You 'd better refer to the mix-processing in the Opencv sample.2. Data Structure Problems: Especially converting

Using the tool: Android Studio 2.0 Preview, Android Device Monitor, MAT (Memory Analyzer).Click "Android Device Monitor" on the Android Studio toolbar, asOpen and select the application process, then click on "Update Heap", then click on each activity of the application repe

One of the most common cases of memory leaks in Android is the long-term retention of references to context, especially activity, so that activity cannot be destroyed. This also means that all the member variables in the activity are not destroyed. This article only describes how to avoid this situation, others such as bitmap not timely recovery caused by the oom exception is not discussed temporarily.First, to prevent memory leaksIn what circumstance

 Refer to https://developer.android.com/tools/debugging/debugging-memory.html, HTTP// Android-developers.blogspot.com/2011/03/memory-analysis-for-android.html. NBSP; HPROF file. hprof-convheap-original.hprof Heap-converted.hprof Download MAT from http://www.eclipse.org/mat/downloads.php. Run MAT