從應用程序首選項中讀取信息，而不是從AndroidManifest.xml中獲取信息

Question

我是Android開發人員中的新成員，並且正在使用Eclipse開發Android應用程序。我提供了一個在Dropbox上同步數據庫的功能。要做到這一點，Dropbox爲我提供了一個用於身份驗證的關鍵值。此鍵已經在AndroidManifest.xml中

<activity 
android:name="com.dropbox.client2.android.AuthActivity" 
android:configChanges="orientation|keyboard" 
android:launchMode="singleTask" > 
<intent-filter> 
    <!-- Change this to be db- followed by your app key --> 
    <data android:scheme="db-xxxxxxxxxx" /> 

    <action android:name="android.intent.action.VIEW" /> 

    <category android:name="android.intent.category.BROWSABLE" /> 
    <category android:name="android.intent.category.DEFAULT" /> 
</intent-filter> 

插入但是使用這個邏輯，最終用戶將不能修改這個值數據庫對他的Dropbox帳戶同步，而不是我的。我製作了一個首選項屏幕，將密鑰存儲在應用程序首選項中，但是我沒有找到從Android Manifest中讀取值的代碼。我認爲這是關於這裏，但我是新的，我不知道如何編輯我的代碼：

public void startAuthentication(Context context) { 
    AppKeyPair appKeyPair = getAppKeyPair(); 

    // Check if the app has set up its manifest properly. 
    Intent testIntent = new Intent(Intent.ACTION_VIEW); 
    String scheme = "db-" + appKeyPair.key; 
    String uri = scheme + "://" + AuthActivity.AUTH_VERSION + "/test"; 
    testIntent.setData(Uri.parse(uri)); 
    PackageManager pm = context.getPackageManager(); 
    List<ResolveInfo> activities = pm.queryIntentActivities(testIntent, 0); 

    if (0 == activities.size()) { 
     throw new IllegalStateException("URI scheme in your app's " + 
       "manifest is not set up correctly. You should have a " + 
       "com.dropbox.client2.android.AuthActivity with the " + 
       "scheme: " + scheme); 
    } else if (activities.size() > 1) { 
     // Check to make sure there's no other app with this scheme. 
     AlertDialog.Builder builder = new AlertDialog.Builder(context); 
     builder.setTitle("Security alert"); 
     builder.setMessage("Another app on your phone may be trying to " + 
       "pose as the app you are currently using. The malicious " + 
       "app cannot access your account, but linking to Dropbox " + 
       "has been disabled as a precaution. Please contact " + 
       "support@dropbox.com."); 
     builder.setPositiveButton("OK", new OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog, int which) { 
       dialog.dismiss(); 
      } 
     }); 
     builder.show(); 
     return; 
    } else { 
     // Just one activity registered for the URI scheme. Now make sure 
     // it's within the same package so when we return from web auth 
     // we're going back to this app and not some other app. 
     String authPackage = activities.get(0).activityInfo.packageName; 
     if (!context.getPackageName().equals(authPackage)) { 
      throw new IllegalStateException("There must be an " + 
        "AuthActivity within your app's package registered " + 
        "for your URI scheme (" + scheme + "). However, it " + 
        "appears that an activity in a different package is " + 
        "registered for that scheme instead. If you have " + 
        "multiple apps that all want to use the same access" + 
        "token pair, designate one of them to do " + 
        "authentication and have the other apps launch it " + 
        "and then retrieve the token pair from it."); 
     } 
    } 

    // Start Dropbox auth activity. 
    Intent intent = new Intent(context, AuthActivity.class); 
    intent.putExtra(AuthActivity.EXTRA_INTERNAL_CONSUMER_KEY, 
      appKeyPair.key); 
    intent.putExtra(AuthActivity.EXTRA_INTERNAL_CONSUMER_SECRET, 
      appKeyPair.secret); 
    if (!(context instanceof Activity)) { 
     // If starting the intent outside of an Activity, must include 
     // this. See startActivity(). Otherwise, we prefer to stay in 
     // the same task. 
     intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
    } 
    context.startActivity(intent); 

你能幫我嗎？

謝謝您提前

Answer 1

我認爲你可能會誤解那個密鑰的用途。它不用於選擇使用哪個帳戶同步文件。

您要更改的密鑰是APP API密鑰。每個用戶不需要唯一的密鑰，除非您針對的是已有自己的API密鑰的開發人員。這用於識別您的應用，並關閉它，除其他外，如果它給Dropbox造成麻煩。

您試圖編輯的此密鑰的特定實例是在用戶使用其個人帳戶進行身份驗證後將控制權還給您的應用。在調用AppKeyPair時，需要保持與用於驗證的密鑰同步appKeys = new AppKeyPair（APP_KEY，APP_SECRET）;

您將無法在運行時修改該意圖過濾器中的數據標記。

Answer 2

對象appKeyPair.key包含所需的密鑰。 我知道AppKeyPair appKeyPair = getAppKeyPair();是做什麼的，但我認爲你可以刪除它，並從共享偏好設置一個簡單的字符串，而不是調用appKeyPair.key。