ubuntu android file transfer

Android development, often in the Java code and the JNI layer passed between the array (byte[]), a typical application is the Java layer to send the data sent to the client stream to the JNI layer, by the JNI layer socket code sent out, of course, The JNI layer also needs to return the data stream received from the socket to the Java layer. I summarized briefly, from the Java layer to the JNI layer, from the JNI layer to the Java layer, there are 3 ki

closed. Test results:java : Java new 5000s waste 3ms c++ : c++ new 5000s Waste 18ms java : java new 10000s Waste 5ms c++ : c++ new 10000s waste 24ms Span class= "http" >java : java new 50000s waste 44ms c++ : c++ new 50000s waste 121ms java : java new 100000s waste 65ms c++ : c++ new 100000s waste 259ms This time, the results show that if the cache method ID and Jclass can be shortened by half the time. But still less fast than Java. It's also good to understand that C + + creat

1. 2. public class Mainactivity extends Activity {WebView WebView; Button Buttonleft, Buttonright; EditText EditText; @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main); WebView = Findviewbyid (R.id.webview); Buttonleft = Findviewbyid (r.id.btnleft); Buttonright = Findviewbyid (r.id.btnright); EditText = Findviewbyid (R.id.edittext); WebSettings websett

closed. Test results:java : Java new 5000s waste 3ms c++ : c++ new 5000s Waste 18ms java : java new 10000s Waste 5ms c++ : c++ new 10000s waste 24ms Span class= "http" >java : java new 50000s waste 44ms c++ : c++ new 50000s waste 121ms java : java new 100000s waste 65ms c++ : c++ new 100000s waste 259ms This time, the results show that the cache method ID and Jclass can be shortened by half the time. But still less fast than Java. This is also very well understood. C + + cr

(r.layout.new_layout);InitData ();Set the data returned to the previous pageSetbackdata ();}private void InitData () {textview= (TextView) Findviewbyid (R.id.text);button= (Button) Findviewbyid (R.id.button1);Get the data transferred from the last page put in intent.Intent=this.getintent ();Bundle=intent.getextras ();Sex=bundle.getstring ("Sex");Height=bundle.getdouble ("height");if (Sex.equals ("M")) {sextext= "Male";}else{sextext= "female";}Getweight ();}private void Getweight () {if (Sex.equ

calculation does not calculate the transfer value? * OK, then the following example we test ... * @author Yong.wang * * */public class MyApplication extends application { private String name ; @Override public void OnCreate () { super.oncreate (); SetName (NAME); Initialize global variable } public String GetName () {return name; } public void SetName (String name) { this.name = name; } private static final String NA

Ubuntu 64 bit under the Android environment, to tell the truth, really have to spend a bit of energy, solve a problem, and come out with a new problem.Small series yesterday just finally set up the environment of Android, this does not, just built a project, directly on the error, the following is a list of several:1. Libstdc++.so.6:cannot open Shared object file

Mainactivity as follows:Package Com.example.helloworld;import Android.app.activity;import Android.content.intent;import android.os.Bundle; Import Android.view.view;import Android.view.view.onclicklistener;import Android.widget.button;public class Mainactivity extends Activity {private Button main_button1 = null; @Overrideprotected void OnCreate (Bundle Savedinstancestate) {super.oncreate (savedinstancestate); Setcontentview (r.layout.activity_main);// Initializes the control in the layout

= (*env)->newbytearray (Env,len); (*env)->setbytearrayregion (env, ByteArray, 0, len, buffer); CLS = (*env)->getobjectclass (env, retobj); FID = (* ENV)->getfieldid (env, CLS, "Retbytes", "[B"]); (*env)->setobjectField (env, retobj, FID, ByteArray); 4. How to return a string in C to java Char charstr[50]; Jstring jstr;jstr = env-Newstringutf (CHARSTR);5. How much space does not know how to use buffer, how to pass out? In the JNI C file, new out of sp

/details/79126652. http://blog.csdn.net/conowen/article/details/7294230Iv. Update of data /** Update Operation*/Update.setonclicklistener (NewView.onclicklistener () {@Override Public voidOnClick (View arg0) {String updatename=Name.gettext (). toString (). Trim (); String Updatescore=Score.gettext (). toString (). Trim (); String SQL= "UPDATE student SET name=?,score=?" Whrer id=? "; if(Index! =NULL){ Try{toast.maketext (mainactivity). This, updatename+ "--" +Updatescore, Toast.

Android AMAP: Multiple Marker + custom pop-up window InfoWindow + anti-encoding Coordinate Transfer address, markerinfowindow 1, Currently, the latest jar: AMap_Search_V5.7.0_20171229.jar can be downloaded from the official website. 2. Create an object class, which contains four parameters used to describe vertex information-MarketBean Public class MarketBean {/***** latitude */private double latitude;/**

to set the correct update source and use apt-get. apt-get is a Linux Command, it is mainly used to search, install, upgrade, and uninstall software or operating systems from software warehouses on the Internet. The apt-get command generally requires the root permission for execution, so it is generally followed by The sudo command. Sudo apt-get install git-core curl This command installs git-core and curl from the software repository on the Internet. Curl is a

. Changed Ubuntu. Ubuntu has poor performance. You cannot set shadow... Author:The dust of the world Reprinted please indicate the source: Http://blog.csdn.net/shulianghan/article/details/20855541. 1. Install Android Studio (1) download the Android Studio development environment : Http://developer.android.com/sdk/ins

the correct update source and use apt-Get. APT-get is a Linux Command, it is mainly used to search, install, upgrade, and uninstall software or operating systems from software warehouses on the Internet. The apt-GET command generally requires the root permission for execution, so it is generally followed by The sudo command. Sudo apt-Get install Git-core curl This command installs Git-core and curl from the software repository on the Internet. Curl is a Fil