[英]How do I pass a value throughout my project and use it anywhere in the program
[英]How can I make my Socket on throughout the program and pass value through it
在这里我创建了一个套接字,我想使其成为全局的并通过单击按钮将整数值传递给该套接字。但是当我尝试使Socket成为全局时却报错,因此如何使Socket成为全局的并传递整数值通过它。 如何使Socket全局,并通过它传递整数值。如何使Socket全局,并通过它传递整数值。
主要活动:
public class MainActivity extends AppCompatActivity {
Button buttonOn;
Button button1;
Socket socket;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
buttonOn = (Button) findViewById(R.id.ON);
button1 = (Button) findViewById(R.id.button1);
try {
System.out.println("HIIIII");
socket = new Socket("198.168.0.79",8888);
socket.getKeepAlive();
} catch (IOException e) {
e.printStackTrace();
}
buttonOn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int temp = 2;
bhari b = new bhari();
b.execute(String.valueOf(temp));
}
});
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int temp = 1;
String fan = String.valueOf(temp);
bhari b = new bhari();
b.execute(fan);
}
});
}
}
巴里语课:
class bhari extends AsyncTask<String,Void,Integer>{
Socket socket;
DataOutputStream dataOutputStream;
@Override
protected Integer doInBackground(String... params) {
String massage = params[0];
try {
if(socket== null){
System.out.println("if");
socket = new Socket("192.168.0.79",8888);
socket.getKeepAlive();
dataOutputStream = new DataOutputStream(socket.getOutputStream());
dataOutputStream.write(Integer.parseInt(massage));
dataOutputStream.flush();
// dataOutputStream.close();
}else {
System.out.println("Else");
dataOutputStream = new DataOutputStream(socket.getOutputStream());
dataOutputStream.write(Integer.parseInt(massage));
dataOutputStream.flush();
// dataOutputStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("End");
return null;
}
}
实际上,您正在asynctask内创建另一个套接字对象。如果要使用相同的套接字对象,则也必须将其传递给asynctask。 它的另一种解决方案是将整数值传递给asynctask,但仅在asynctask内部创建套接字
您只需要创建一个单例
class Mysocket{
private static Socket socket;
public static Socket getInstance()
{
if(socket==null)
{
socket = new Socket("192.168.0.79",8888);
socket.getKeepAlive();
}
return socket;
}
}
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