Question

我有一个TapTarget，当我打开应用程序时，我只希望它在应用程序首次启动时就打开，如何存储值以确保它在其他启动时不会再次打开，这是我尝试过的方法，但无法正常工作，TapTarget每次应用启动时都会打开。

代码：

realm.executeTransaction { realm ->
        val result = Taptarget()
        result.cal = ""
        result.chat = ""
        result.depfpsc = ""
        result.info = ""
        result.module = ""
        realm.insert(result)

    }

    realm.executeTransaction { realm ->
        val result = realm.where(Taptarget::class.java).findFirst()!!
        if(result.module == "Y")
        {

        }
        else
        {
            if (mFabPrompt != null) {
                return@executeTransaction
            }
            mFabPrompt = MaterialTapTargetPrompt.Builder(this@MainActivity)
                    .setTarget(findViewById<View>(R.id.navigation_modules))
                    .setPrimaryText("Send your first email")
                    .setSecondaryText("Tap the envelope to start composing your first email")
                    .setIconDrawable(resources.getDrawable(R.drawable.ic_folder_black_24dp))
                    .setBackgroundColour(resources.getColor(R.color.colorAccentTrans))
                    .setAnimationInterpolator(FastOutSlowInInterpolator())
                    .setPromptStateChangeListener { prompt, state ->
                        if (state == MaterialTapTargetPrompt.STATE_FOCAL_PRESSED || state == MaterialTapTargetPrompt.STATE_DISMISSING) {
                            mFabPrompt = null
                        }
                    }
                    .create()
            mFabPrompt!!.show()
            result.depfpsc = "Y"
            realm.insertOrUpdate(result!!)
        }
    }

Answer 1

我不确定您使用哪种语言编写代码。但是让我用我精通的Java进行解释。您可以轻松地将其适应任何其他语言。

首先像这样创建一个类PreferencesManager：

public class PreferencesManager {

SharedPreferences pref;
SharedPreferences.Editor editor;
Context _context;

// shared pref mode
int PRIVATE_MODE = 0;

// Shared preferences file name
private static final String PREF_NAME = "splash-welcome";

// Shared preference variable name
private static final String IS_FIRST_TIME_LAUNCH = "IsFirstTimeLaunch";

// Constructor
public PrefManager(Context context) {
    this._context = context;
    pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
    editor = pref.edit();
}

// This method to be used as soon as the fist time launch is completed to update the 
// shared preference
public void setFirstTimeLaunch(boolean isFirstTime) {
    editor.putBoolean(IS_FIRST_TIME_LAUNCH, isFirstTime);
    editor.commit();
}

// This method will return true of the app is launched for the first time. false if 
// launched already 
public boolean isFirstTimeLaunch() {
    return pref.getBoolean(IS_FIRST_TIME_LAUNCH, true);
}
}

现在，在每个活动中，您都必须检查应用程序是否是首次启动：

 PreferencesManager preferencesManager = new PreferencesManager (this);
 if (!preferencesManager.isFirstTimeLaunch()) {
    // Set shared preference value to false so that this block will not be called 
    // again until your user clear data or uninstall the app
    preferencesManager.setFirstTimeLaunch(false); 
    // Write your logic here
    }

这可能不是您要查找的确切答案。但这可能会为您指明正确的方向：）

仅在首次使用应用程序时打开TapTarget

1 个答案: