    public static Process clearAppUserData(String packageName) {
        Process p = execRuntimeProcess("pm clear " + packageName);
        return p;
    }

    public static  Process execRuntimeProcess(String commond) {
        Process p = null;
        try {
            p = Runtime.getRuntime().exec(commond);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return p;
    }

方案二：手動刪除內(nèi)部儲存和外部儲存

優(yōu)點

由自身控制，可以重新拉起APP。

缺點

1.沒有系統(tǒng)級的清除那么徹底，比如重新拉起后不需要重新申請權(quán)限。當然數(shù)據(jù)庫，SharePreferences相關(guān)的通通都會刪掉的

2.因為數(shù)據(jù)庫文件被刪除，所以重新拉起啟動頁時需要刪除當前進程，此時會黑屏一下。

代碼

注意：說明一點下面代碼中的ApplicationManager.getApplication()其實是獲取了當前app的Application對象，也可以替換成context。

   public void use(){
       //使用
        clearPublic();
        clearPublic();
        restartApp();
    }

   public static void restartApp() {
        Activity activity = getActivity();
        final Intent intent = activity.getPackageManager().getLaunchIntentForPackage(activity.getPackageName());
        if (intent != null) {
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            activity.startActivity(intent);
        }
        //殺掉以前進程
        android.os.Process.killProcess(android.os.Process.myPid());
    }

    /**
     * 清空公有目錄
     */
    public static void clearPublic() {
        if (ApplicationManager.getApplication() == null) {
            throw new RuntimeException("App no init");
        }
        String publicFilePath = Environment.getExternalStorageDirectory().getPath() + "/" + getPackageInfo().packageName;
        File dir = new File(publicFilePath);
        File[] files = dir.listFiles();
        if (null != files) {
            for (File file : files) {
                deleteFolder(file.getAbsolutePath());
            }
        }
    }

    /**
     * 清空私有目錄
     */
    public static  void clearPrivate() {
        if (ApplicationManager.getApplication() == null) {
            throw new RuntimeException("App no init");
        }
        //清空文件夾
        File dir = new File(ApplicationManager.getApplication().getFilesDir().getParent());
        File[] files = dir.listFiles();
        if (null != files) {
            for (File file : files) {
                if (!file.getName().contains("lib")) {
                    deleteFolder(file.getAbsolutePath());
                }
            }
        }
    }

    /**
     * 刪除指定文件
     */
    private static  boolean deleteDirectory(String filePath) {
        boolean flag = false;
        if (!filePath.endsWith(File.separator)) {
            filePath = filePath + File.separator;
        }
        File dirFile = new File(filePath);
        if (!dirFile.exists() || !dirFile.isDirectory()) {
            return false;
        }
        flag = true;
        File[] files = dirFile.listFiles();
        for (File file : files) {
            if (file.isFile()) {
                flag = deleteSingleFile(file.getAbsolutePath());
                if (!flag) {
                    break;
                }
            } else {
                flag = deleteDirectory(file.getAbsolutePath());
                if (!flag) {
                    break;
                }
            }
        }
        if (!flag) {
            return false;
        }
        return dirFile.delete();
    }

    /**
     * 刪除單個文件
     *
     * @param filePath 被刪除文件的文件名
     * @return 文件刪除成功返回true，否則返回false
     */
    private static boolean deleteSingleFile(String filePath) {
        File file = new File(filePath);
        if (file.isFile() && file.exists()) {
            return file.delete();
        }
        return false;
    }

    /**
     * 根據(jù)路徑刪除指定的目錄或文件，無論存在與否
     */
    private static boolean deleteFolder(String filePath) {
        File file = new File(filePath);
        if (!file.exists()) {
            return false;
        } else {
            if (file.isFile()) {
                return deleteSingleFile(filePath);
            } else {
                return deleteDirectory(filePath);
            }
        }
    }

    /**
     * 獲取包信息
     */
    private static PackageInfo getPackageInfo() {
        PackageManager packageManager = ApplicationManager.getApplication().getPackageManager();
        PackageInfo packInfo = null;
        try {
            packInfo = packageManager.getPackageInfo(ApplicationManager.getApplication().getPackageName(), 0);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return packInfo;
    }