保存到共享preferences从定制对话框preference [英] Saving to SharedPreferences from custom DialogPreference

问题描述

我目前得到了preferences屏幕，我已经创建了一个扩展对话preference ，并从我的$中调用的自定义类p $ pferences。我的preferences数据似乎存储/从共享preferences 检索没有问题，但我想从<$ C加2多套的设置$ C>对话preference 。

I've currently got a preferences screen, and I've created a custom class that extends DialogPreference and is called from within my Preferences. My preferences data seems store/retrieve from SharedPreferences without an issue, but I'm trying to add 2 more sets of settings from the DialogPreference.

基本上我有，我一直没能找到的两个问题。我见过的每一个网站给了我同样的标准信息，以数据备份/恢复，我仍然有问题。首先我想保存到我的共享preferences （在code最后块可见）用户名和密码，如果有可能，我想要能做到这一点在的onClick（）。

Basically I have two issues that I have not been able to find. Every site I've seen gives me the same standard info to save/restore data and I'm still having problems. Firstly I'm trying to save a username and password to my SharedPreferences (visible in the last block of code) and if possibly I'd like to be able to do it in theonClick().

我的preferences XML调用我的对话preference ：

My preferences XML that calls my DialogPreference:

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">

 <PreferenceCategory>   
 <com.rone.optusmon.AccDialog
  android:key="AccSettings"
  android:title="Account Settings"
  android:negativeButtonText="Cancel"
  android:positiveButtonText="Save" />   

 </PreferenceCategory> 
</PreferenceScreen> 

我的自定义对话框preference类文件：

My Custom DialogPreference Class file:

package com.rone.optusmon;

import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.preference.DialogPreference;
import android.preference.PreferenceManager;
import android.text.method.PasswordTransformationMethod;
import android.util.AttributeSet;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class AccDialog extends DialogPreference implements DialogInterface.OnClickListener {


 private TextView mUsername, mPassword;
 private EditText mUserbox, mPassbox;
 CharSequence mPassboxdata, mUserboxdata;
 private CheckBox mShowchar;
 private Context mContext;

 private int mWhichButtonClicked;


 public AccDialog(Context context, AttributeSet attrs) {
  super(context, attrs);
  mContext = context;

 }

 @Override
 protected View onCreateDialogView() {

// Access default SharedPreferences
@SuppressWarnings("unused")
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(mContext);


  @SuppressWarnings("unused")
  LinearLayout.LayoutParams params;
  LinearLayout layout = new LinearLayout(mContext);
   layout.setOrientation(LinearLayout.VERTICAL);
   layout.setPadding(10, 10, 10, 10);
   layout.setBackgroundColor(0xFF000000);

   mUsername = new TextView(mContext);
    mUsername.setText("Username:");
    mUsername.setTextColor(0xFFFFFFFF);
    mUsername.setPadding(0, 8, 0, 3);

   mUserbox = new EditText(mContext);
    mUserbox.setSingleLine(true); 
    mUserbox.setSelectAllOnFocus(true);

   mPassword = new TextView(mContext);
    mPassword.setText("Password:");
    mPassword.setTextColor(0xFFFFFFFF);

   mPassbox = new EditText(mContext);
    mPassbox.setSingleLine(true);
    mPassbox.setSelectAllOnFocus(true);

   mShowchar = new CheckBox(mContext);
    mShowchar.setOnCheckedChangeListener(mShowchar_listener);
    mShowchar.setText("Show Characters");
    mShowchar.setTextColor(0xFFFFFFFF);
    mShowchar.setChecked(false);
    if(!mShowchar.isChecked()) {
     mPassbox.setTransformationMethod(new PasswordTransformationMethod());
    }


   layout.addView(mUsername);
   layout.addView(mUserbox);
   layout.addView(mPassword);
   layout.addView(mPassbox);
   layout.addView(mShowchar);

  return layout; 
 } 


 public void onClick(DialogInterface dialog, int which) {
  mWhichButtonClicked = which;
  // if statement to set save/cancel button roles
  if (mWhichButtonClicked == -1) {
   Toast.makeText(mContext, "Save was clicked\nUsername: " + mUserbox.getText().toString() +"\nPassword is: " + mPassbox.getText().toString(), Toast.LENGTH_SHORT).show();       
   // Save user preferences
   SharedPreferences settings = getDefaultSharedPreferences(this);
   SharedPreferences.Editor editor = settings.edit();
   editor.putString("usernamekey", mUserbox.getText().toString());
   editor.putString("passwordkey", mPassbox.getText().toString());
   editor.commit();

  }
  else {
   Toast.makeText(mContext, "Cancel was clicked", Toast.LENGTH_SHORT).show();
  }
 } 
}

我的主要活动测试code：

My main activity test code:

public void onResume() {
    super.onResume();   

    SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(this);
    StringBuilder builder = new StringBuilder();

    builder.append("\nThe monitor will refresh every "+ pref.getString("refreshfreq", "30 minutes"));
    builder.append("\nThe skin chosen is "+ pref.getString("skinkey", "null"));
    builder.append("\nThe style chosen is "+ pref.getString("stylekey", "% used"));
    builder.append("\nThe font chosen is "+ pref.getString("fontkey", "Calibri"));
    builder.append("\nThe font color is "+ pref.getString("fontcolkey", "White"));
    builder.append("\nYour username is "+ pref.getString("usernamekey", "not set yet"));
    builder.append("\nYour password is "+ pref.getString("passwordkey", "not set yet"));

    Toast.makeText(Optusmon.this, builder.toString(), Toast.LENGTH_LONG).show();

    }

在我的共享preferences设置= preferenceManager.getDefaultShared preferences（本）; 行，Eclipse中说的方法getDefaultShared preferences（AccDialog）是未定义的类型AccDialog。我已经尝试了上下文更改我的preferences类，使用空白背景和我也试命名我的共享preFS和使用 getShared preferences（）为好。我只是不知道我在做什么在这里。

In my SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this); line, Eclipse says "The method getDefaultSharedPreferences(AccDialog) is undefined for the type AccDialog". I've attempted to change the context to my preferences class, use a blank context and I've also tried naming my SharedPrefs and using getSharedPreferences() as well. I'm just not sure exactly what I'm doing here.

正如我一般是很新的Java / Android的/编码，你能不能请尽可能详细与任何帮助，例如。其中我的文件，我需要写code并在该文件的下落，我应该把它写（即的onCreate（），的onClick（ ）等）

As I'm quite new to Java/Android/coding in general, could you please be as detailed as possible with any help, eg. which of my files I need to write the code in and whereabouts in that file should I write it (i.e. onCreate(), onClick(), etc)

推荐答案

在的onCreate（）你回来之前，执行这条线，所以Eclipse中说，这是不可达。
在你的的onClick（）尝试：

In the onCreate() you returned before execute this line, so Eclipse says it's unreachable. In your onClick() try:

SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(mContext); 

应该是确定

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