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First, if you want to use SDcard for storage in your program, we have to set the following permissions on the Androidmanifset.xml file:"android.permission.MOUNT_ Unmount_filesystems"/> " Android.permission.WRITE_EXTERNAL_STORAGE "/>Several static methods under the Environment class are then used when reading and writing with SDcard:1:getdatadirectory () Get to the data directory in Android (Data folder in SD
Android SDK + eclipse provides the SD card simulation method. The usage is as follows:
1. Create an SD card image file.
Mksdcard 1024 M sdcard. img
This command will generate an sdcard. imgfile in the current directory, which is the
}Else if(Status.equalsignorecase (environment.media_nofs)) { -Toast.maketext (Techolite. This, "Although the SD card exists but its file system is not supported", Toast.length_long). Show (); -}Else if(Status.equalsignorecase (environment.media_unmountable)) { -Toast.maketext (Techolite. This, "Although the SD card is
Android database SQLite writes SD card, androidsqlite
If the mobile phone does not have a root user, the database files cannot be viewed and debugging is not convenient.
The best way is to write the database into the SD card.
There are two changes:
1. In your helper class,
/DEMO.DB"; Database name public
static FINAL String table_name = "mytag";//datasheet name, a database can contain more than one datasheet, similar to the Sheet1,sheet2 in Excel
// Mydbhelper's constructor, we are concerned with the name database_name and version versions public
Mydbhelper {
Super database_name, NULL, VERSION);
Because if just a separate file name, the last created database file is stored in the phone's internal memory card (not
This article illustrates how Android obtains the SD card path and SDcard memory. Share to everyone for your reference. The specific analysis is as follows:
Yesterday in studying the problem of the storage path breakthrough after the photo shoot, the beginning of the storage path is written to death: private String folder = "/sdcard/dcim/camera/" (Image storage p
1. Use the mksdcard command to create a 128 m sd card image named sdcard. IMG (m must be capitalized.Mksdcard 128 M sdcard. img2. Copy sdcard. IMG to D: \ projects2 and set the startup parameters in the run configuration dialog box in eclipse.-Sdcard D: \ projects2 \ sdcard. imgIn this way, the SD card is available.3.
Android-read and write data to the SD card
// Write data to the SD card private void writeSDcard (String str) {try {// determine whether the SD card if (Environment. getExternalStorageS
", Toast.length_short). Show (); } } Public voidonclick10 (view view) {if(Environment.getexternalstoragestate (). Equals (environment.media_mounted)) {//1. Get the content you want to store//String content = Et_5.gettext (). toString (); //2. Get the external storage directory with package name--only to the root directoryString Sdpath =environment.getexternalstoragedirectory (). GetAbsolutePath (); //Toast.maketext (activitydata.this, "sdpath=" +sdpath, Toast.length_long). Show (); //the
I. Get permission to read the SD card Second, find the SD card directory/** * Environment.getexternalstoragedirectory () obtained: ", Mnt/sdcard" that found the root directory of the SD card */ private String path= Env
In the previous section, we learned how to use file for Android data storage. However, such data is stored in applications. Therefore, the size of such stored files must be limited, sometimes we need to store larger files, such as movies, which uses our sdsard memory card. Android also provides sdcard related operations. Environment class can implement this funct
In the LAN, the implementation from the Android client to the mobile phone SD card files uploaded to the PC server side, and saved in the PC hard drive under the specified folder. At the same time, the PC-side hard disk file directory and the file description information stored in the MySQL database.1, the client key code:(1) Get the files on the
Address: http://www.cnblogs.com/TerryBlog/archive/2010/06/26/1765910.html
SD card for Android Simulators
In this example, you can directly specify the music file in the SD card for operations. How can we use the SD
() + "/image.jpg"); bitmap newbitmap = imagetools. zoombitmap (bitmap, bitmap. getwidth ()/scale, bitmap. getheight ()/scale); // because the bitmap memory usage is large, memory needs to be recycled here; otherwise, an out of Memory exception bitmap will be reported. recycle (); // display the processed image on the interface and save it to the local iv_image.setimagebitmap (newbitmap); imagetools. savephototosdcard (newbitmap, environment. getexternalstoragedirectory (). getabsolutepath (), S
I recently made a music player and needed to add MP3 files to the SD card. The following describes how to use sdcard.
The android simulator allows us to use the disk image in FAT32 format as the SD card simulation:
All of the following operations are performed in Windows1. C
An easy way for Android to determine the presence and capacity of an SD card is as follows:The first step is to increase the access rights of the SD card in Androidmanifest.xml[HTML]View Plaincopy
uses-permission android:name="Android.permission.MOUNT_UNMOUNT_F
Mounted SD card for Android simulator in Linux
1. Create an SD card:
~ /Gingerbread $ mksdcard-l mysdcard 256 m mysdcard. img
Create an SD card image file in the current directory na
Sometimes using the Android simulator to simulate SD card related operations, in Eclipse can directly view the SD card directory;First, the new simulator to create the SD card, the size
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