我正在制作一个加密纯文本然后通过电子邮件发送的应用程序。我cText在“加密”方法中创建的变量（从用户输入的 passT 和 keyT 创建）在方法结束时返回。然而，我很好奇我将如何将它合并到我的 onCreate 方法中，以便将它的新加密内容包含到电子邮件中？以下是我所拥有的，但我只收到错误：
public class ScreenNext extends Activity {
int key = 0;
static char ch;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_screen_next)
EditText emailT;//Import EditTexts (Key and Email)
Button send = (Button) findViewById(R.id.bSend);//Import button1 (Send)
final EditText passT = (EditText) findViewById(R.id.etTogg);//passT variable for Password Text for EditText field
final EditText keyT = (EditText) findViewById(R.id.etKey);
final EditText passT = (EditText) findViewById(R.id.etTogg);//passT variable for Password Text for EditText field
send.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
String keyText = keyT.getText().toString();
String passText = passT.getText().toString();
String EmailAdd = emailT.getText().toString();
//This must be fixed
//String cipherText = cText.getText().toString();
Intent email = new Intent(Intent.ACTION_SEND);//The intent
email.setType("plain/text");
email.putExtra(Intent.EXTRA_EMAIL, new String[]{EmailAdd.toString()});
email.putExtra(Intent.EXTRA_SUBJECT, "Your encrypted Password");//Subject is hard coded for convenience sake
email.putExtra(Intent.EXTRA_TEXT, cText.toString());//Here we add encrypted Password that has just been generated
startActivity(email);//Start the activity
}
});
}//End onCreate
...
}
还有我的加密方法：
public static String message(String choice, String subKey, String message) {
int Option = Integer.parseInt(choice);//Must pareseInt
int key = Integer.parseInt(subKey);
message = message.toLowerCase();
ScreenNext subcipher_1 = null;
String CipherTxt = subcipher_1.encrypt(message, key);
return CipherTxt;
}
public static String encrypt(String Txt, int key) {
//local var cipherText of type string is init empty
String CipherTxt = "";//May be able to remove this'un
String cText="";
//enhanced for loop
// start at 0, go until "as long as input text"
for (int i = 0; i < Txt.length(); i++) {
//get a char from the string at index i (start at 0 work through to end of string)
// and store in local var extractedChar for type char
char extractedChar = Txt.charAt(i);
/* enhanced for loop
* start at 0, go until end of user entered cipherKeyValue
* either set to lowercase a or add one to the char
* uses the checkifz method
*/
for (int j = 0; j < key; j++) {
ScreenNext subcipher_1 = null;
if (subcipher_1.checkIfZ(extractedChar) == true) {
extractedChar = 'a';
} else {
extractedChar++;
}
CipherTxt= new StringBuilder().append(extractedChar).toString();
}
//add extracted char to builder object
//change object builder to string and assing to cipherText of type String
//create new object builder from StringBuilder class
cText = cText.concat(CipherTxt);
}
//Pass the cipherText value out of the method to whom ever called it
return cText;
}
很感谢任何形式的帮助。