SP, file and sdcard Storage

XML:

<Linearlayout xmlns: Android = "http://schemas.android.com/apk/res/android"
Android: layout_width = "match_parent"
Android: layout_height = "match_parent"
Android: Orientation = "vertical">

<Button
Android: Id = "@ + ID/btnwrite"
Android: layout_width = "match_parent"
Android: layout_margintop = "20dp"
Android: layout_height = "wrap_content"
Android: text = "SP storage"/>

<Button
Android: Id = "@ + ID/btnread"
Android: layout_width = "match_parent"
Android: layout_height = "wrap_content"
Android: text = "SP read"/>

<Button
Android: Id = "@ + ID/btnfilewrite"
Android: layout_width = "match_parent"
Android: layout_height = "wrap_content"
Android: text = "file storage"/>

<Button
Android: Id = "@ + ID/btnfileread"
Android: layout_width = "match_parent"
Android: layout_height = "wrap_content"
Android: text = "File Reading"/>

<Button
Android: Id = "@ + ID/btnfilewritetosd"
Android: layout_width = "match_parent"
Android: layout_height = "wrap_content"
Android: text = "sdcard storage"/>

<Button
Android: Id = "@ + ID/btnfilereadtosd"
Android: layout_width = "match_parent"
Android: layout_height = "wrap_content"
Android: text = "sdcard read"/>
</Linearlayout>

 

Activity:

Public class extends activity implements onclicklistener {

@ Override
Protected void oncreate (bundle savedinstancestate ){
Super. oncreate (savedinstancestate );
Setcontentview (R. layout. sharepreference );
Findviewbyid (R. Id. btnwrite). setonclicklistener (this );
Findviewbyid (R. Id. btnread). setonclicklistener (this );
Findviewbyid (R. Id. btnfilewritetosd). setonclicklistener (this );
Findviewbyid (R. Id. btnfilewrite). setonclicklistener (this );
Findviewbyid (R. Id. btnfileread). setonclicklistener (this );
Findviewbyid (R. Id. btnfilereadtosd). setonclicklistener (this );
}
@ Override
Public void onclick (view v ){
Switch (V. GETID ()){
Case R. Id. btnwrite:
Sharedpreferences sp = getsharedpreferences ("setting ",
Context. mode_private );
Sharedpreferences. Editor editor = sp. Edit ();
Editor. putstring ("name", "James ");
Editor. putint ("Age", 25 );
Editor. putint ("weight", 120 );
Editor. Commit ();
Break;
Case R. Id. btnread:
Sharedpreferences spread = getsharedpreferences ("setting ",
Context. mode_private );
String name = spread. getstring ("name", "null ");
Int age = spread. getint ("Age", 18 );
Int Weight = spread. getint ("weight", 15 );
Toast. maketext (this, name + "--" + age + "--" + weight,
Toast. length_long). Show ();
Break;
Case R. Id. btnfilewrite:
Writefile ();
Break;
Case R. Id. btnfileread:
Readfile ();
Break;
Case R. Id. btnfilewritetosd:
Writefilestosdcard ();
Break;
Case R. Id. btnfilereadtosd:
Readfilesfromsdcard ();
Break;
}

}
// Write an object
Public void writefile (){
Fileoutputstream OS = NULL;
Try {
OS = This. openfileoutput ("jerei.txt", context. mode_private );
OS. Write ("Name: James". getbytes ());
OS. Write ("Age: 25". getbytes ());
OS. Write ("Body Weight: 100". getbytes ());
} Catch (filenotfoundexception e ){
E. printstacktrace ();
} Catch (ioexception e ){
E. printstacktrace ();
} Finally {
If (OS! = NULL ){
Try {
OS. Close ();
} Catch (ioexception e ){
E. printstacktrace ();
}
OS = NULL;
}
}

}
// Read the file
Public void readfile (){
Fileinputstream is = NULL;
Stringbuilder sb = new stringbuilder ();
Try {
Is = This. openfileinput ("jerei.txt ");
Byte [] buffer = new byte [1024];
Int Len = 0;
While (LEN = is. Read (buffer ))! =-1 ){
String TMP = new string (buffer, 0, Len );
SB. append (TMP );
}
} Catch (filenotfoundexception e ){

E. printstacktrace ();
} Catch (ioexception e ){

E. printstacktrace ();
} Finally {
If (is! = NULL ){
Try {
Is. Close ();
} Catch (ioexception e ){

E. printstacktrace ();
}
}
}
Toast. maketext (this, SB. tostring (), Toast. length_long). Show ();
}
// Save it to the SD card
Public void writefilestosdcard (){
String filepath = NULL;
If (environment. getexternalstoragestate (). Equals (
Environment. media_mounted )){
// Obtain the sdcard root path
Filepath = environment. getexternalstoragedirectory (). tostring ();
Filepath = filepath + file. Separator + "jerei" + file. Separator
+ "Edu ";
File fileparent = new file (filepath );
If (! Fileparent. exists ()){
Fileparent. mkdirs ();
}
Fileoutputstream OS = NULL;
Try {
OS = new fileoutputstream (new file (fileparent, "a.txt "));
OS. Write ("Write File to sdcard !! ". Getbytes ());
} Catch (filenotfoundexception e ){
E. printstacktrace ();
} Catch (ioexception e ){
E. printstacktrace ();
} Finally {
If (OS! = NULL ){
Try {
OS. Close ();
} Catch (ioexception e ){
E. printstacktrace ();
}
}
}
}
}

// Read the SD card
Public void readfilesfromsdcard (){
Fileinputstream is = NULL;
Stringbuilder sb = new stringbuilder ();
Try {
Is = This. openfileinput ("a.txt ");
Byte [] buffer = new byte [1024];
Int Len = 0;
While (LEN = is. Read (buffer ))! =-1 ){
String TMP = new string (buffer, 0, Len );
SB. append (TMP );
}
} Catch (filenotfoundexception e ){

E. printstacktrace ();
} Catch (ioexception e ){
E. printstacktrace ();
} Finally {
If (is! = NULL ){
Try {
Is. Close ();
} Catch (ioexception e ){
E. printstacktrace ();
}
}
}
Toast. maketext (this, SB. tostring (), Toast. length_long). Show ();
}

}

SP, file and sdcard Storage