Android在UI线程中启动新线程复制文件，为什么还会使界面延迟

Question

new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
// 把sql文件写入sd卡，然后把路径给so
String mPath="";
if(android.os.Environment.getExternalStorageState().equals("mounted")){
mPath = android.os.Environment.getExternalStorageDirectory().toString()
+ "/com.newhaoli.Teamtips/";
}else{
mPath=android.os.Environment.getDataDirectory().getAbsolutePath()+
"/com.newhaoli.Teamtips/";
}
// TODO Auto-generated method stub
// 扫描或者复制整个文件夹到sd卡上
copyDir("Query", mPath+"Workflow/");
copyDir("htmlinc", mPath+"Workflow/");
copyDir("Html", mPath+"Workflow/");
}
}).start();

Answer 1

android 自带有异步线程封装的很好。