我一直在桌子上打了一个星期。希望有人可以提供帮助。
以下是我要做的事。
显示登录警告对话框。 - 最好我喜欢库存看起来所以alertdialog.builder对我有用。我试过制作一个自定义对话框，但我似乎无法让按钮看起来正确。
如果密码是正确的开始活动，但是如果它没有重新显示对话框，直到取消或更正。
这听起来很直接，但我无法绕过它。我的代码看起来很脏，我知道我一直在剪切和粘贴内容。
我正在调用getpasswd方法oncreate并在每个错误的密码之后调用。在方向改变方面，我的窗户泄漏了。所以我尝试了这个oncreatedialog的东西，我不再得到泄漏，但我不能在旋转之间保持我的edittext文本框，即使输入不正确，我也无法在按下“确定”按钮后重新显示对话框。任何指针都将非常感激。
感谢。
package com.mstamp.dreamhostpal;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class GetLoginPassword extends Activity {
public static String MY_PREFS = "Settings";
private static final String TAG = "MyActivity";
String value;
String crypto;
String text;
boolean setup;
String cleartxt;
boolean cancel_pushed;
private static final int ALERT_DIALOG1 = 1;
Dialog dialog;
//final EditText input = new EditText(this);
boolean dismissed = false;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.setup_password);
loadPreferences();
// showDialog(ALERT_DIALOG1);
// getPasswd();
}
@Override public void onPostCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
showDialog(ALERT_DIALOG1);
//getPasswd();
}
protected void onPause() {
super.onPause();
//dialog.dismiss();
if (cancel_pushed == false) {
//EXIT();
}
}
private void EXIT() {
this.finish();
}
public void loadPreferences() {
int mode = Activity.MODE_PRIVATE;
SharedPreferences mySharedPreferences = getSharedPreferences(MY_PREFS, mode);
crypto = mySharedPreferences.getString("cryptedAPIKey", null);
setup = mySharedPreferences.getBoolean("setup", false);
}
@Override
protected Dialog onCreateDialog(int id) {
Dialog dialog;
switch(id) {
case ALERT_DIALOG1:
dialog= getPasswd();
break;
default:
dialog = null;
}
return dialog;
}
private Dialog getPasswd() {
Dialog dialog;
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setCancelable(false);
alert.setTitle("Login");
// Set an EditText view to get user input
final EditText input = new EditText(this);
//final EditText editTextPasswordFirst= (EditText)d.findViewById(R.id.EditTextPasswordFirst);
input.setHint("Password");
alert.setView(input);
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
value = input.getText().toString();
// Do something with value!
if (value != null && value.trim().length() == 0) {
Context context = getApplicationContext();
CharSequence text = "Please enter a password.";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
getPasswd();
} else if (value.trim().length() < 5 && value.trim().length() > 0) {
Context context = getApplicationContext();
CharSequence text = "The password must be 5 characters or greater.";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
//getPasswd();
dismissed = true;
}
else {
try {
if (setup) {
cleartxt = CryptoHelper.decrypt(value, crypto);
Intent MainCommandsList = new Intent();
MainCommandsList.setClassName("com.mstamp.dreamhostpal", "com.mstamp.dreamhostpal.MainCommandsList");
MainCommandsList.putExtra("cleartxtAPIKey", cleartxt);
MainCommandsList.putExtra("cleartxtpassword", value);
startActivity(MainCommandsList);
}
if (!setup) {
cleartxt = CryptoHelper.decrypt(value, crypto);
Intent GetCommandsMakeDatabase = new Intent();
GetCommandsMakeDatabase.setClassName("com.mstamp.dreamhostpal", "com.mstamp.dreamhostpal.GetCommandsMakeDatabase");
GetCommandsMakeDatabase.putExtra("cleartxtAPIKey", cleartxt);
GetCommandsMakeDatabase.putExtra("cleartxtpassword", value);
startActivity(GetCommandsMakeDatabase);
EXIT();
}
} catch (Exception e) {
// TODO Auto-generated catch block
//e.printStackTrace();
Context context = getApplicationContext();
CharSequence text = "That password was incorrect.";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
getPasswd();
}
}
}
});
alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
// Canceled.
cancel_pushed = true;
EXIT();
}
});
dialog = alert.create();
return dialog;
//alert.show();
}
答案 0 :(得分：2)
你可以这样做：
private void launchLoginDialog() {
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Enter your username and password");
LayoutInflater factory = LayoutInflater.from(this);
View varianceDialogView = factory.inflate(R.layout.loginDialog,null);
alert.setView(loginDialogView);
alert.setTitle(R.string.loginDialogTitle);
alert.setPositiveButton("login", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
if (IsLogincheckOk == false){
launchLoginDialog();
}
else{
doWhatYouWant();
}
}
});
alert.show();
}
答案 1 :(得分：0)
使用密码对话框的方式，您可能需要重新加载活动。
因此，如果密码错误，您只需创建一个意图，然后再次调用该活动。
如果您检查了正确的密码，如果密码不正确，请尝试以下操作：
Intent i = new Intent(this, GetLoginPassword.class);
startActivity(i);
但是，我没有尝试使用同一活动中的意图调用活动，所以你必须尝试一下，但我认为它可能有用。
我实施处理密码的方式有点复杂。
我在我的PasswordPrompt Activity的onStart方法中调用了我自己的自定义Dialog类，如下所示：
myPWRslt = new OnReadyListener();
objPwPrompt = new PasswordDialog(SecurityPrompt.this, myPWRslt);
objPwPrompt.show();
在我的自定义PasswordDialog Dialog类中，我声明了一个已定义的自定义界面，用于处理输入的密码的结果。我设置了一个全局变量，用于检查是否给出了成功的密码。
protected interface ReadyListener {
abstract void ready(int iResultCode);
然后，输入密码后，我在PasswordPrompt Activity类中定义了ReadyListener接口。如果按下了错误的密码，则会再次显示该对话框。如果按下取消，则退出应用程序。
private class OnReadyListener implements PasswordDialog.ReadyListener {
@Override
public void ready(int iResultCd) {
try {
switch (iResultCd) {
case PasswordDialog.RESULT_LOGIN_SUCCESS_CODE:
PasswordPrompt.this.setBlPasswordOK(true);
Intent i = new Intent(PasswordPrompt.this, myMainActivity.class);
startActivity(i);
PasswordPrompt.this.finish();
break;
case PasswordDialog.RESULT_LOGIN_INCORRECT_CODE:
PasswordPrompt.this.setBlPasswordOK(false);
objPWClass.showDialog(iResultCd);
break;
case PasswordDialog.RESULT_EXCEEDED_ATTEMPTS_CODE:
PasswordPrompt.this.setBlPasswordOK(false);
objPWClass.showDialog(iResultCd);
break;
case PasswordDialog.RESULT_LOGIN_CANCELLED_CODE:
PasswordPrompt.this.setBlPasswordOK(false);
// exit application
System.gc();
PasswordPrompt.this.finish();
break;
default:
break;
}// end switch
}// end try
catch (Exception error) {
//handle the error
}// end try/catch (Exception error)
}// end public void result(boolean success)
}// end OnReadyListener
以下是我的PasswordDialog布局的XML：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LinearLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<EditText
android:id="@+id/txtPwEntry"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text=""
android:inputType="textPassword"
android:selectAllOnFocus="true"
android:hint="Enter your Password"
android:nextFocusDown="@+id/btnPwSubmit"
android:maxLength="25" >
</EditText>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:stretchColumns="*"
android:background="#000000"
>
<TableRow android:background="#000000" android:layout_margin="2dp">
<LinearLayout
android:id="@+id/myWidget248"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginBottom="5dp"
>
<Button
android:id="@+id/btnPwSubmit"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:textStyle="bold"
android:textSize="14sp"
android:text="Submit" >
</Button>
<Button
android:id="@+id/btnPwCancel"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:textSize="14sp"
android:text="Cancel" >
</Button>
</LinearLayout>
</TableRow>
</TableLayout>
</LinearLayout>