我尝试为我的应用程序设置和存储密码,但它根本不起作用。密码应该是第一次设置然后返回主页,然后当用户再次打开它时,密码应该被存储但不知何故它没有存储它。
PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences passfile = getSharedPreferences("ans",0);
String pass = passfile.getString("ans", null);
check.setOnClickListener(new OnClickListener () {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String answer1 = answer.getText().toString();
//Check that user typed in an answer
if(answer1.length()<8){
Toast.makeText(CheckPwActivity.this, "Answer must be 8 characters long", Toast.LENGTH_SHORT).show();
answer.setText("");
answer.requestFocus();
return;
}
answer.getEditableText().toString();
//check if the answer is valid
if (answer1.equals("ans")) {
Intent intent2 = new Intent(CheckPwActivity.this,MainActivity.class);
startActivity(intent2);
}else{
return;
}
}});
}
public void setPassword(String key, String value) {
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences.Editor editor = preferences.edit();
Editor preferenceEditor = context.getSharedPreferences("password", 8).edit();
preferenceEditor.putString(key, value);
preferenceEditor.commit();
}
public static String getPassword(String filename) {
return context.getSharedPreferences("password", 2).getString(filename,"");
}