How to realize system Storage in Java
This article is about how to implement system storage in Java. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.
1. Save the data
Btn_ok.setOnClickListener (new OnClickListener () {
@ Override
Publicvoid onClick (View v) {
String user = et_user.getText (). ToString (). Trim ()
String pwd = et_pwd.getText (). ToString (). Trim ()
If (user.isEmpty () | | pwd.isEmpty ()) {
Toast.makeText (getApplicationContext (), "cannot be empty", 200). Show ()
} else {
String name= "data.txt"
Stringcontent=user+ "=" + pwd
/ / StringBuffer sb = newStringBuffer ()
String content = sb.append (userName) .append ("=") .append (password) .append ()
Try {
FileOutputStream fos=openFileOutput (name, MODE_PRIVATE)
Fos.write (content.getBytes ())
Fos.close ()
Toast.makeText (getApplicationContext (), "saved successfully", 200. show ()
} catch (Exception e) {
/ / TODO Auto-generated catch block
E.printStackTrace ()
}
}
}
});
Data reading of 1pc2 data
Btn_show.setOnClickListener (new OnClickListener () {
@ Override
Publicvoid onClick (View v) {
String name= "data.txt"
Try {
FileInputStream fis=openFileInput (name)
BufferedReaderbr=new BufferedReader (new InputStreamReader (fis))
/ / read the data of the document
String content = br.readLine ()
/ / split string
String [] strs = content.split ("=")
/ / displayed data
If (! content.isEmpty ()) {
Et_user.setText (strs [0])
Et_pwd.setText (strs [1])
}
} catch (Exception e) {
/ / TODO Auto-generated catch block
E.printStackTrace ()
}
}
});
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