Simple Android reads and writes files

Environment: 1. system: window72.android version: 2.23.eclipse3.5.2 (Galileo) I. Basic flowchart (writing files) II. simulator running interface 1. main Interface 2. save (non-conforming) 3. save normally 4. read files 5. editor 3, Code 1. save the main code of the file. Save the main code 1 bsave. setonclicklistener (new view. onclicklistener () {2 3 @ override 4 Public void onclick (view v) {5 // todo auto-generated method stub 6 resid = R. string. success; 7 file_name = filename. gettext (). tostring (); 8 file_content = filecontent. gettext (). tostring (); 9/* openfileoutput api10 * fileoutputstream openfileoutput (string name, int mode) 11 * open a private file associated wi Th this context's application package for writing. creates the file if it doesn' t already exist.12 */13/* context four modes api14 * context. mode_append --> If the file already exists then write data to the end of the existing file instead of erasing it.15 * context. mode_private --> the default mode, where the created file can only be accessed by the calling application (or all applications sharing the SA Me user ID ). 16 * context. mode_world_readable --> allow all other applications to have read access to the created file.17 * context. mode_world_writeable --> allow all other applications to have write access to the created file.18 */19 flag = insertinfo (); 20 if (FLAG) {21 try {22 outputstream outstream = filestoreactivity. this. openfileoutput (file_name, mode_private); 23 fileservice. save (outstream, file_conte NT); 24 25} catch (exception e) {26 log. E (TAG, E. tostring (); 27 resid = R. string. error; 28} 29 toast. maketext (filestoreactivity. this, resid, toast. length_long ). show (); 30} 31} 32 33 34}); 2. read the main code of the file to read the main code 1 button bread = (button) findviewbyid (R. id. read); 2 bread. setonclicklistener (new view. onclicklistener () {3 4 @ override 5 Public void onclick (view v) {6 // todo auto-generated method stub 7 // The file content is hidden at this time The label 8 filecontent of the box and file content. setvisibility (view. gone); 9 textview content = (textview) findviewbyid (R. id. content); 10 content. setvisibility (view. gone); 11 inputstream instream; 12 file_name = filename. gettext (). tostring (); 13 14/* api15 * fileinputstream openfileinput (string name) 16 * open a private file associated with this context's application package for reading. 17 */18 try {19 instream = filestoreac Tietong. this. openfileinput (file_name); 20 string context = fileservice. read (instream ). tostring (); 21 toast. maketext (filestoreactivity. this, context, toast. length_long ). show (); 22} catch (exception e) {23 log. E (TAG, E. tostring (); 24 resid = R. string. error; 25} 26} 27}); 3. about the editor's code about the encoding code button babout = (button) findviewbyid (R. id. about); babout. setonclicklistener (new view. onclicklistener () {@ override public Vo Id onclick (view v) {// todo auto-generated method stub new alertdialog. builder (filestoreactivity. this ). settitle ("editor information "). setmessage ("Editor: naive_monk" + "\ n" + "Hobbies: Basketball, music, dating" + "\ n" + "Q: 1271522052 "+" \ n "+" Email: summerdir@gmail.com "+" \ n "+" City: Huizhou, Guangdong "+" \ n "). setcancelable (false ). setpositivebutton ("OK", new dialoginterface. onclicklistener () {@ override public void onclick (dialoginterface Dia Log, int ID) {// todo auto-generated method stub dialog. dismiss ();}}). setnegativebutton ("exit", new dialoginterface. onclicklistener () {@ override public void onclick (dialoginterface dialog, int ID) {// todo auto-generated method stub dialog. dismiss ();}}). show () ;}}); 4. business Code code/** save file */public static void save (outputstream outstream, string content) throws exception {// write data outstream. WRI Te (content. getbytes (); outstream. close ();}/** Read File */public static string read (inputstream instream) throws exception {// bytearrayoutputstream outstream = new bytearrayoutputstream (); byte [] buffer = new byte [1024]; int Len =-1; // get the byte data while (LEN = instream. read (buffer ))! =-1) {outstream. write (buffer, 0, Len);} // obtain byte Data byte [] DATA = outstream. tobytearray (); outstream. close (); instream. close (); return new string (data);} 4. This example is just a simple operation. Composition Reading and writing of parts is not perfect in many places. I hope that interested netizens can communicate with each other ~~~