android桌面添加快捷方式之判斷是否存在無效 – Android移動開發技術文章_手機開發 Android移動開發教學課程

前面寫瞭如何創建 刪除和判斷快捷方式的方法 但是後來發現判斷快捷方式的方法不是總是很有效 上網查瞭下 發現大傢的為問題都是2.2版本之後的就判斷不正確瞭

在此 將原來的判斷方法貼一下

Java代碼 
private boolean hasShortCut() { 
        ContentResolver resolver = getContentResolver(); 
        Cursor cursor = resolver.query(Uri.parse("content://com.android.launcher.settings/favorites?notify=true"), null, "title=?", 
                        new String[] {getString(R.string.app_name)}, null); 
 
        if (cursor != null && cursor.moveToFirst()) { 
                cursor.close(); 
                return true; 
        } 
 
        return false; 
    } 

 

後來 我看瞭一下2.2版本和1.5版本的launcher中的清單文件

1.5的如下：

Java代碼 
<!– Intent received used to install shortcuts from other applications –> 
        <receiver 
            android:name=".InstallShortcutReceiver" 
            android:permission="com.lp.launcher.permission.INSTALL_SHORTCUT"> 
            <intent-filter> 
                <action android:name="com.lp.launcher.action.INSTALL_SHORTCUT" /> 
            </intent-filter> 
        </receiver> 
 
        <!– Intent received used to uninstall shortcuts from other applications –> 
        <receiver 
            android:name=".UninstallShortcutReceiver" 
            android:permission="com.lp.launcher.permission.UNINSTALL_SHORTCUT"> 
            <intent-filter> 
                <action android:name="com.lp.launcher.action.UNINSTALL_SHORTCUT" /> 
            </intent-filter> 
        </receiver> 
 
        <!– The settings provider contains Home's data, like the workspace favorites –> 
        <provider 
            android:name="LauncherProvider" 
            android:authorities="com.lp.launcher.settings" 
            android:writePermission="com.lp.launcher.permission.WRITE_SETTINGS" 
            android:readPermission="com.lp.launcher.permission.READ_SETTINGS" /> 

2.2的如下：
Java代碼 
<!– Intent received used to install shortcuts from other applications –> 
        <receiver 
            android:name="com.android.launcher2.InstallShortcutReceiver" 
            android:permission="com.android.launcher.permission.INSTALL_SHORTCUT"> 
            <intent-filter> 
                <action android:name="com.android.launcher.action.INSTALL_SHORTCUT" /> 
            </intent-filter> 
        </receiver> 
 
        <!– Intent received used to uninstall shortcuts from other applications –> 
        <receiver 
            android:name="com.android.launcher2.UninstallShortcutReceiver" 
            android:permission="com.android.launcher.permission.UNINSTALL_SHORTCUT"> 
            <intent-filter> 
                <action android:name="com.android.launcher.action.UNINSTALL_SHORTCUT" /> 
            </intent-filter> 
        </receiver> 
 
        <!– The settings provider contains Home's data, like the workspace favorites –> 
        <provider 
            android:name="com.android.launcher2.LauncherProvider" 
            android:authorities="com.android.launcher2.settings" 
            android:writePermission="com.android.launcher.permission.WRITE_SETTINGS" 
            android:readPermission="com.android.launcher.permission.READ_SETTINGS" /> 

可以看出來 創建和刪除快捷方式的receiver沒什麼變化
但是查詢的provider有瞭變化

Java代碼 
android:authorities="com.android.launcher.settings" 

Java代碼 
android:authorities="com.android.launcher2.settings" 

所以說我們的方法用在2.2之後的版本是無效的

現修改代碼如下：

Java代碼 
public static boolean hasShortCut(Context context) { 
        String url = ""; 
        System.out.println(getSystemVersion()); 
        if(getSystemVersion() < 8){ 
            url = "content://com.android.launcher.settings/favorites?notify=true"; 
        }else{ 
            url = "content://com.android.launcher2.settings/favorites?notify=true"; 
        } 
        ContentResolver resolver = context.getContentResolver(); 
        Cursor cursor = resolver.query(Uri.parse(url), null, "title=?", 
                        new String[] {context.getString(R.string.app_name)}, null); 
 
        if (cursor != null && cursor.moveToFirst()) { 
                cursor.close(); 
                return true; 
        } 
 
        return false; 
    } 
private static int getSystemVersion(){ 
        return android.os.Build.VERSION.SDK_INT; 
    } 

作者“TryLoveCatch”