如何确定主屏幕快捷方式是否存在？

Question

Is there a way to determine whether a particular home screen shortcut exists?

My application installs a shortcut on the home screen at device startup time under certain conditions and I don't want duplicate shortcuts to appear. I also don't want Toast messages appearing saying "Shortcut created" or "Shortcut already exists" every single time the device boots. I've found an undocumented Intent Extra called EXTRA_SHORTCUT_DUPLICATE which will prevent duplicate shortcuts from being installed but the Launcher still displays the "Shortcut already exists" Toast message. I'd rather not rely on this undocumented Intent Extra if there is a supported technique for this.

Answer 1

当您的应用创建快捷方式时，请将布尔值设置为“ true”，然后将其存储在存储中（例如小文件或sharedpreferences）。并在您尝试创建快捷方式时检查其值。

Answer 2

isn't that kind of intrusive? Why not just add it once, and let the user decide if they want to keep it or not?

Answer 3

**// Checking if ShortCut was already added
SharedPreferences sharedPreferences = getPreferences(MODE_PRIVATE);
        boolean shortCutWasAlreadyAdded = sharedPreferences.getBoolean("PREF_KEY_SHORTCUT_ADDED", false);
        if (shortCutWasAlreadyAdded) return;
        Intent shortcutIntent = new Intent(getApplicationContext(), MainActivity.class);
        shortcutIntent.setAction(Intent.ACTION_MAIN);
        Intent addIntent = new Intent();
        addIntent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
        addIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, "SBM");
        addIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, Intent.ShortcutIconResource.fromContext(getApplicationContext(), R.drawable.ic_launcher));
        addIntent.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
        sendBroadcast(addIntent);
        // Remembering that ShortCut was already added
        SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.putBoolean("PREF_KEY_SHORTCUT_ADDED", true);
        editor.commit();**