关于网友提出的“AndroidStudio下读取assets下db文件报错”问题疑问，本网通过在网上对“AndroidStudio下读取assets下db文件报错”有关的相关答案进行了整理，供用户进行参考，详细问题解答如下：
问题：AndroidStudio下读取assets下db文件报错
描述:Androidandrostudio
Hi，以下问题困扰我很久，求大神们不吝赐教！
首先我是用的IDE是AndroidStudio 1.5.1 ，API 23 （Android 6.0）
在读取assets下的db文件时出现问题，以下是我的相关代码以及报错提示：
ublic class AntiVirusDao {
private static String DB_PATH = "";
private static String DB_NAME = "antivirus.db";
public static String checkVirus(String md5,Context context){
String desc = null;
/**打开病毒MD5数据库*/
SQLiteDatabase db = SQLiteDatabase.openDatabase
(DB_PATH = context.getApplicationInfo().dataDir + "/"+DB_NAME,null,SQLiteDatabase.OPEN_READWRITE);
Cursor cursor = db.rawQuery("select desc from datable where md5=?",new String[]{md5});
if(cursor.moveToNext()){
desc = cursor.getString(0);
}
cursor.close();
db.close();
return desc;
}new Thread(){
public void run(){
Message msg = Message.obtain();
msg.what = SCAN_BEGIN;
myHandler.sendMessage(msg);//sengEmptyMessage只能存放整形数据,sendMessage可以存放其他类型
List installedPackage = pm.getInstalledPackages(0);
total = installedPackage.size();
for(PackageInfo info : installedPackage){
if(!flag){
isStop = true;
return;
}
String apkpath = info.applicationInfo.sourceDir;
String md5info = MD5Utils.getFileMD5(apkpath);
// context = getApplicationContext();
String result = AntiVirusDao.checkVirus(md5info,mcontext);
msg = Message.obtain();
msg.what = SCANNING;
ScanAppInfo scanAppInfo = new ScanAppInfo();
if(result==null){
scanAppInfo.description = "您的手机安全";
scanAppInfo.isVirus = false;
}else {
scanAppInfo.description = result;
scanAppInfo.isVirus = true;
}
process++;
scanAppInfo.packageName = info.packageName;
scanAppInfo.appName = info.applicationInfo.loadLabel(pm).toString();
msg.obj = scanAppInfo;
msg.arg1 = process;
myHandler.sendMessage(msg);
try{
Thread.sleep(300);
}catch (InterruptedException e){
e.printStackTrace();
}
}
msg = Message.obtain();
msg.what = SCAN_FINISH;
myHandler.sendMessage(msg);
};
}.start();
}
解决方案1: 读取assets下的文件用InputStream is = getAssets().open("文件名");
以上介绍了“AndroidStudio下读取assets下db文件报错”的问题解答，希望对有需要的网友有所帮助。
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