Android中獲取當前APP版本號（記錄）

try {
    PackageManager pm = mContext.getPackageManager();
    PackageInfo pi = pm.getPackageInfo(mContext.getPackageName(), 0);
    Toast.makeText(mContext, "版本號：" + pi.versionName, Toast.LENGTH_SHORT).show();
} catch (PackageManager.NameNotFoundException e) {
    e.printStackTrace();
}