delete root files android

. Local_module: = localmodulename Local_src_files: = ((local_moduleapps.apk Local_module_class: = apps Local_module_suffix: = $ (common_android_package_suffix) Include $ (build_prebuilt) (9)Add a static Java Library Local_path: = $ (call my-DIR) Include $ (clear_vars) # Build all java files in the Java subdirectory Local_src_files: = $ (call all-subdir-Java-files) # Any libraries that this library depends o

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 p

",". jpeg ",". png ",". gif ",". wav ",". Mp2 ",". mp3 ",". Ogg ",". AAC ",". mpg ",". Mpeg ",". Mid ",". Midi ",". SMF ",". Jet ",". RT TTL ",". Imy ",". Xmf ",". mp4 ",". m4a ",". m4v ",". 3gp ",". 3GPP ",". 3g2 ",". 3gpp2 ",". Amr ",". AWB ",". wma ",". wmv " You can add the following file names to files that are larger than the size. Test 1:Test root directory Location: Listassetsfile ("/"); Ge

screen. PT (Point): The physical size of the screen. 1/72 inches. Dp/dip: pixels independent of density, a unit of abstraction based on screen density. 1DP = 1px on a monitor 160 dots per inch. However, the ratio of DP and PX varies with the screen density, and different devices have different display effects. SP: A scale-independent pixel that is used primarily for font display of best for TEXTSIZE, as a unit of text-related size.Xml:android:textsize= "@dimen/some_name"Assets folder resource A

The android.apk file is actually a zip file that can be opened directly with WinRAR. As shown in: Includes a META-INF directory A res directory An androidmanifest. xml A classes. Dex Androidmanifest. XML must be defined and contained by each application. It describes the application name, version, permission, referenced library file, and other information. For example, to upload an APK to Google market, configure the XML file. META-INF directory The META-INF directory stores signature informa

1. Compile a static library libstatic_android.a LOCAL_PATH: = $ (call my-dir) Include $ (CLEAR_VARS)LOCAL_MODULE: = static_androidLOCAL_SRC_FILES: = libstatic_android.aInclude $ (PREBUILT_STATIC_LIBRARY) Include $ (CLEAR_VARS)LOCAL_MODULE: = fpdfembedsdkLOCAL_SRC_FILES: = xxxx. cppLOCAL_C_INCLUDES: = $ (LOCAL_PATH)/../include/LOCAL_LDLIBS: =-llog-g-L.-ljnigraphics # Fill in the foxit library here# LOCAL_LDLIBS + = libstatic_android.aLOCAL_STATIC_LIBRARIES: = static_androidInclude $ (BUILD_SHARED

Android log printing LogUtils can locate the class name, method name, and number of lines with errors, and save log files. 　　During development, we often use the log printing method to debug our applications. In Java, we often use the System. out. println () method to print logs on the console for debugging. Android has a dedicated Log class to print logs in the

We usually need to store large files such as audio and video on our mobile phones. We have learned how to store files (using File Operations) before. Considering the small storage space of mobile phones, at this time, we need to store the files in SDcard. Today we have learned how to store sdcard in android; First, if

Sharing a file (shared files)This series of articles in my study of Google Developer documentation combined with Google translation and their own understanding of the writing, I hope to learn Android development friends bring some convenience, due to the limited level of personal translation, so the content contains the original text and translation, I hope that the browser combined understanding, so as not

can store more data. 2. Store database files in the SD card! What is sqlitedatabase? An instance of sqlitedatabase represents an SQLite database. Through some methods of the sqlitedatabase instance, we can execute SQL statements to add, delete, query, and modify data databases. Note that the database is private to an application, and the database name is unique in an application. What is sqliteopenhelpe

/sdcard0/folder14. Directory under the Application Data directoryIn general, under $appdatadir, there will be two directories:1. data cache: $cacheDir = $appDataDir/cache : Internal storage: Context.getCacheDir() When the body is out of memory, the file is deleted External storage:Context.getExternalCacheDir()External storage without real-time monitoring, when the space is low, the file will not be deleted in real time, may return an empty objectExample Con