我有下面的代碼(它不是完整的代碼,但其餘無關緊要)。我試圖根據用戶在Alertdialog中選擇的內容將boolean「ignoreLength」設置爲true或false。然而,當代碼是這樣的,我得到這個錯誤:無法更改AlertDialog中的最終變量
「不能指非最終變量ignoreLength在不同的方法定義的內部類中」
當我做它最後,它改變爲此:
「最後的局部變量ignoreLength無法分配,因爲它是在一個封閉的類型定義」
我怎樣才能使這樣我就可以改變ignoreLength?
package com.grawl.passgen;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class PassGenActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
// Interface -- Default
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Interface -- Custom
final Button button_generate = (Button) findViewById(R.id.button_generate);
final EditText text_pass = (EditText) findViewById(R.id.textPassWord);
final EditText edit_length = (EditText) findViewById(R.id.editLength);
// Set up Arrays
final String[] lowerCase;
final String[] upperCase;
final String[] numbers;
final String[] symbols;
// Fill Arrays
createArray characters = new createArray();
lowerCase = characters.getArrayLower();
upperCase = characters.getArrayUpper();
numbers = characters.getArrayNumbers();
symbols = characters.getArraySymbols();
// Pressing the button WOOOSH!
button_generate.setOnClickListener(new View.OnClickListener() {
**boolean ignoreLength = false;**
public void onClick(View v) {
// Set up parameters
boolean lowerCaseEnabled = true; // needs interface option
boolean upperCaseEnabled = true; // needs interface option
boolean numbersEnabled = true; // needs interface option
boolean symbolsEnabled = true; // needs interface option
// Set up length based on input from EditText
int length = 0;
try {
length = Integer.parseInt(edit_length.getText().toString());
} catch(NumberFormatException nfe) {
Toast.makeText(PassGenActivity.this, "Can't parse " + nfe, Toast.LENGTH_LONG).show();
}
if (length < 1) {
length = 1;
edit_length.setText("1");
Toast.makeText(PassGenActivity.this, "Password length can't be less than 1, set it to 1.", Toast.LENGTH_LONG).show();
};
if (length > 100) {
AlertDialog.Builder alert = new AlertDialog.Builder(PassGenActivity.this);
alert.setTitle("Warning");
alert.setMessage("You are trying to create quite a long password, are you sure?");
alert.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
ignoreLength = true;
}
});
alert.setNegativeButton("No", null);
alert.show();
}
Password password = new Password();
password.fillPassword(lowerCase, upperCase, numbers, symbols);
// Generate password
password.setPassword(lowerCaseEnabled, upperCaseEnabled, numbersEnabled, symbolsEnabled, length);
text_pass.setText(password.getPassword());
}
});
}
}
decalare boolean ignoreLength = false;外部和之前的點擊監聽器。並且因爲需要更改而不能完成它 – 2012-04-03 19:32:59
當我在點擊偵聽器之外改變它時,它會給出相同的錯誤。 – Grawl 2012-04-03 19:34:14