Question

我正在使用NDK来实现我的Android应用程序，我的C代码中有一个无限循环来通过socket发送和recv，然后我将这个传输的数据存储在一个与我的java代码共享的变量中，现在我需要在textview上在线看到这个变量，但我可以＆＃39 ;因为循环在C代码里面而不是在doInBackground（）中的java ...并且它需要像那样，所以我想知道如何在我的C代码循环中调用PublishProgress，或者直接赋值变量来自C ...的文本视图

public class ClientTask extends AsyncTask<Void, Long, String>
{
private TextView textStatus;
private TextView textStatus2;
private InetAddress serverAdress;
long dif;   // This is my shared variable between c and java

public native String  clientFromJNI();
static {
    System.loadLibrary("hello-jni");
}

private static final int PORT = 1234;

public ClientTask(View textStatus,View textStatus2 , InetAddress serverAdress)
{
    this.textStatus = (TextView) textStatus;
    this.textStatus2 = (TextView) textStatus2;
    this.serverAdress = serverAdress;
}

@Override
protected String doInBackground(Void... params)
{
   //publishProgress(dif);


/* // I tried this to call publishProgress frequently by another thread but it did't work well

    new Thread(new Runnable() {
        public void run(){
            while (true) {
                publishProgress(dif);
            }
        }
    }).start();
*/

    return  clientFromJNI();
}

@Override
protected void onPostExecute(String result)
{
    setTextStatus("CLI: " + result );
}

@Override
protected void onProgressUpdate(Long... progress) {

    textStatus2.setText(Long.toString(progress[0]));
  // textStatus.setText(Long.toString(progress[0]));
}

这是我的C代码

JNIEXPORT jstring JNICALL
Java_com_example_hellojni_ClientTask_clientFromJNI(JNIEnv* env, jobject obj )
{
jfieldID fid;
jmethodID mid;
jclass myclass;

jclass cls = (*env)->GetObjectClass(env, obj);
fid = (*env)->GetFieldID(env,cls,"dif","J");

   // mid = (*env)->GetMethodID(env,cls,"publishProgress","()V"); 
  //I don't know how to get publishProgress if it is possible

int connfd;
short port;
struct sockaddr_in servaddr, cliaddr;
socklen_t cliaddrlen = sizeof(cliaddr);

port=1234;

memset(&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(port);
servaddr.sin_addr.s_addr =  inet_addr("192.168.49.1");

connfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
connect(connfd, (struct sockaddr *) &servaddr,sizeof(servaddr));
long now; 
char str[16];

   while (1)
{
    read(connfd, str, 16 );
    sscanf(str,"%lu",&now);
    (*env)->SetLongField(env, obj ,fid , now);
    //(*env)->CallVoidMethod(env,obj,);   I wish here I can call publishProgress but I don't know how, please help me!
}
close (connfd);
return (*env)->NewStringUTF(env, str);
}

我知道在没有NDK的情况下实现这个很容易，但是我需要用C做这个，请帮助我。

在jni中调用PublishProgress - 将jni中的变量变量分配给textview

0 个答案: