how to delete unwanted files in android

Well, I've thought about not moving Android in the future, but I didn't think it was the reason for the game. Many of the problems with Android are due to eclipse's imperfections, such as the one encountered today unable to execute Dex:multiple Dex files define [2011-10-23 16:23:29-dex Loader] Unable to execute Dex:multiple Dex

Put a file to the/cache partition by yourself. After restarting, the file disappears. How does it disappear? Step 1. Packages \ providers \ downloadprovider \ SRC \ com \ Android \ providers \ downloads \ storagemanager. Java: /** * Removes files in the systemcache and downloads data dir without corresponding entries in * the downloads database. * This can occur if a

files. Put the JSON file you want to use in the Extract directory (you can download the JSON example to http://www.json-schema.org/address): Then, at the command line, enter: Jsonschema2pojo--source Address--target Java-gen You can enter the-HELP option to view additional parameters: Jsonschema2pojo–help For some non-standard JSON files, you need to include the

An explanation of the Android file files operationThe Android file operation should have permission:Determine if the SD card is plugged inEnvironment.getexternalstoragestate (). Equals (Android.os.Environment.MEDIA_MOUNTED);Get the SD card root directoryFile skroot = Environment.getexternalstoragedirectory ();Get the private root directoryFile fileroot = Context.

When learning the Android development process, encountered R.java generation problem, summed up several methods to solve.1, the first thing to do is to check the correctness of the code, there is the wrong code, do not compile build R.java2. Right-click Project, select Android Tools, Fix project Properties3. Click Project on the navigation, and the build automatically on the hook.4. Click on the Project,cle

currently in the project's existing platform. Refer to the online or the following example: Armeabi! This platform has existing so and homing pigeon, normal! --libcurrent.so current project has so--libtpnssecurity.so carrier pigeon--libtpnswatchdog.so homing pigeon armeabi-v7a! This platform has existing so and homing pigeon, normal! --libcurrent.so current project has so--libtpnssecurity.so carrier pigeon--libtpnswatchdog.so homing pigeon mips!!! Error, because this platform only homing pigeon

The Android program function Copies files in the assets folder to the SD card (including subfolders) of the mobile phone and androidassets. Recently, the function is to copy all files (including sub-files) in the asset folder to the specified directory. The method used is nothing more than AssetManager. However, the pr

1. Asynchttpclient, Requestparams, Asynchttpresponsehandler three ways to use a class (1) asynchttpclient public class Asynchttpclient extends Java.lang.Object This class is typically used in Android applications to create asynchronous get, POST, put, and delete HTTP requests, request parameters created through Requestparams instances, and respond by overriding anonymous inner classes Responsehandler

The first case for everyone to share Android traverse a specific directory of all files, including subdirectories, and delete the most recently created. Private Boolean Deletelastfromfloder (String path) {Boolean success = false; try {arraylist The second case describes the folder traversal Android cod

. In addition, the file class has some of the following common operations:String Name = File.getname (); Get the name of the file or folder:String Parentpath = File.getparent (); Get the parent directory of a file or folderString path = File.getabsoultepath ();//Absolute Road warpString path = File.getpath ();//Relative Road warpFile.createnewfile ();//Build fileFile.mkdir (); Create a folderFile.isdirectory (); Judging is a file or folderfile[] files

[Android] does not display the generated image files in the system Gallery, I encountered a problem before, that is, after I generated a new Bitmap in the program, I did not see the new image when I opened the system's Gallery view. However, open the file browser, find the folder where the Bitmap is saved, and you can see the Bitmap file generated by the program. That is to say, the file actually exists, bu

Android development accumulation _ 1) Get files, folder buckets, and use Toast in a user-friendly manner Record the file-related content that needs to be used frequently. In other words, good memory is not as good as bad writing! 1) /*** Obtain the total memory space of a file or folder in the path *** @ return */public static long getTotalMemorySize (String path) {StatFs stat = new StatFs (path); long

in one of the jar bags in libs. Hide the Annotation.jar bag, delete it is OK. This is the most Orthodox solution.2. Downgrade the V4 package. Because the v4 of the high version number includes Annotation.jar, it is possible to force the setting in the outermost build.grable:{ repositories { jcenter() } configurations.{ resolutionStrategy.force ‘com.android.support:support-annotations:22.1.0‘ }}3, in the need to V4 bag exclud

false;}/*** Delete Log File */public static void deleteLogFile () {File file = new File (filePath); if (file. exists () {file. delete ();}}}2. writing data to a file asynchronously does not affect user experience, and there cannot be any latency due to log writing. (In this experiment, if the data written to a file is small at a time, it will not be too slow even if the data is synchronized) to achieve thi

A slightly larger project will use a third-party library, so there will inevitably be a different CPU architecture for the phone. So library files ' x86 ', ' x86_64 ', ' MIPS ', ' Mips64 ' Armeabi ', ' armeabi-v7a ', ' arm64-v8a ' But not all third-party libraries will adapt to all the CPU architecture, I have to test the use of a reduced performance and reduce the library file is only used armeabi-v7a library; armeabi-v7a The other is deleted, no arm

First, call the Android Lint command to find out which resources are not used and generate a list of listings: Command:lint–check "Unusedresources" [Project_path] > Result.txtafter execution, a manifest file is generated, which reads as follows: Use code to automatically delete useless files: public class Delaction {public static void Main (string

()///folder directory for all files for (int i = 0; i 5)Use this method to prevent multiple pop-up reminders when a toast is triggered multiple timesPrivate Toast mtoast = null;private void Showtoast (context context, String str) {if (mtoast = = null) {Mtoast = Toast.maket EXT (context, str, toast.length_short);} else {mtoast.settext (str);} Mtoast.show ();}File related actions:1) String name = File.getname ();// get the file or folder names:2) File.