我有一个非常简单的public class MainActivity extends Activity {
Random rn;
AutoCompleteTextView searchBar;
public static String urlGlobal;
TextView con;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
searchBar=(AutoCompleteTextView) findViewById(R.id.autoCompleteTextView);
Button button=(Button) findViewById(R.id.button);
con=(TextView) findViewById(R.id.textView);
rn= new Random();
final SharedPreferences perf= this.getSharedPreferences("com.karanvir.shareprefernces", Context.MODE_PRIVATE);
//setting up an alert
if(perf==null){
new AlertDialog.Builder(this)
.setIcon(android.R.drawable.alert_dark_frame)
.setTitle("How to use")
.setMessage("Search what you want in the search bar! after we will choose a search engine our computer will recommend. After that you can change the search engine using the options menu in the right hand corner")
//then need to set a onclick listener with our positive button
.setPositiveButton("eng", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(MainActivity.this, "its done", Toast.LENGTH_SHORT).show();
//where we would right our code where the user would confirm us to do
perf.edit().putString("choiceOne","eng").apply();
}
//25165012725
})
.setNegativeButton("fren", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
perf.edit().putString("choiceOne","fre").apply();
}
})
.show();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings4) {
Intent intentGoogle= new Intent(getApplicationContext(),Main2Activity.class);
startActivity(intentGoogle);
return true;
} else if(id ==R.id.action_settings2){
Intent intentGoogle= new Intent(getApplicationContext(),Yahoo.class);
startActivity(intentGoogle);
return true;
}else if (id==R.id.action_settings3){
Intent intentGoogle= new Intent(getApplicationContext(),MainActivity.class);
startActivity(intentGoogle);
return true;
}else if(id==R.id.action_settings1){
new AlertDialog.Builder(getApplicationContext())
.setIcon(android.R.drawable.ic_dialog_info)
.setTitle("About")
.setMessage(".....")
.show();
return true;
}
else if (id==R.id.action_settings5){
new AlertDialog.Builder(getApplicationContext())
.setIcon(android.R.drawable.ic_dialog_info)
.setTitle("About")
.setMessage("This app intercha")
.show();
return true;
}
return super.onOptionsItemSelected(item);
}
public void jump(View view){
//intnet changing target of our code
urlGlobal=searchBar.getText().toString();
Log.i("stuff",urlGlobal);
int pageJump = rn.nextInt(3)+1;
if (pageJump==1){
//google
Intent intentGoogle= new Intent(getApplicationContext(),Main2Activity.class);
startActivity(intentGoogle);
} else if (pageJump==2){
//YAHOO
Intent intentGoogle= new Intent(getApplicationContext(),Yahoo.class);
startActivity(intentGoogle);
} else if(pageJump==3){
//GOOGLE
Intent intentGoogle= new Intent(getApplicationContext(),Main2Activity.class);
startActivity(intentGoogle);
}
try {
InputMethodManager imm = (InputMethodManager)getSystemService(INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
} catch (Exception e) {
// TODO: handle exception
}
}
}
和client代码：
服务器
server客户端：
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
int main()
{
int server_sockfd, client_sockfd;
int server_len, client_len;
struct sockaddr_in server_address;
struct sockaddr_in client_address;
server_sockfd = socket(AF_INET, SOCK_STREAM, 0);
server_address.sin_family = AF_INET;
server_address.sin_addr.s_addr = htonl(INADDR_ANY);
server_address.sin_port = htons(9734);
server_len = sizeof(server_address);
bind(server_sockfd, (struct sockaddr *)&server_address, server_len);
listen(server_sockfd, 5);
while ( 1 )
{
char ch;
printf("server waiting\n");
client_len = sizeof(client_address);
client_sockfd = accept(server_sockfd, (struct sockaddr *)&client_address, &client_len);
read(client_sockfd, &ch, 1);
ch += 4;
write(client_sockfd, &ch, 1);
close(client_sockfd);
}
}
考虑我已在机器#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
int main(int argc, char *argv[])
{
int sockfd;
int len;
struct sockaddr_in address;
int result;
char ch = 'P';
sockfd = socket(AF_INET, SOCK_STREAM, 0);
address.sin_family = AF_INET;
address.sin_addr.s_addr = inet_addr(argv[1]);
address.sin_port = htons(9734);
len = sizeof(address);
result = connect(sockfd, (struct sockaddr *)&address, len);
if(result == −1)
{
perror("oops: client1");
return 1;
}
write(sockfd, &ch, 1);
read(sockfd, &ch, 1);
printf("char from server = %c\n", ch);
close(sockfd);
return 0;
}
中执行server代码，当我尝试在机器X中执行A(10.18.17.26)时，我收到此错误：
client但是我能够从机器X $ ./client 10.18.17.26
oops: client1: Connection refused
机器A，反之亦然。计算机ping和A已在X网络中连接。
但是，如果我在机器intranet的对等服务器上运行client代码，它可以正常工作并生成此输出：
A希望我能在这里找到解决方案来解决这个问题。提前谢谢！