java - 如何将数据从线程发送到主要 Activity

我有一个线程，我想进行一些计算，然后将其发送到程序的主要 Activity 中。我该怎么做？

线程是

class RemindTask extends TimerTask {
    public void run() {
        flag = true;
        System.out.println(" Hello World!");
        for (int e=0; e<2; e++){
            fileToReceive = fileparts.peek();
            System.out.println("fileToReceive "+fileToReceive);
            fileToReceive = fileparts.remove();
        }
        IntegerResult = 4;
        flag=false;
    }

我想将IntegerResult发送到主要 Activity 。从这里的 Activity 中调用此计时器

Timer timer = new Timer();
                       timer.schedule(new RemindTask(), 0,30000);

然后，我需要将IntegerResult应用于主要 Activity
主要如此
主要方法是

int i=0;
//IntegerResult = 4; here i need to take the result of the thread
while (!fileparts.isEmpty()  ) { //&& !fileparts1.isEmpty() && (flag == false)
    String[] myStringArray = new String[IntegerResult];
    for (int e=0; e<IntegerResult; e++){
        if (fileToReceive != null && !fileparts.isEmpty() ){
            fileToReceive = fileparts.peek();
            myStringArray[e] =  fileToReceive;
            fileToReceive = fileparts.remove();
         } else {
            myStringArray[e] =  " ";
         }
         System.out.println("myStringArray["+e+"] " + myStringArray[e]);
    }

最佳答案

有两种方法:

如前所述，在ASyncTask上使用它。

创建一个处理程序以接收响应。

就像是:

public static int YOUR_INT_MESSAGE = 100;

class RemindTask extends TimerTask {
    public void run() {
        flag = true;
        System.out.println(" Hello World!");
        for (int e=0; e<2; e++){
            fileToReceive = fileparts.peek();
            System.out.println("fileToReceive "+fileToReceive);
            fileToReceive = fileparts.remove();
        }
        IntegerResult = 4;
        flag=false;
        Message msg = new Message();
        msg.what = YOUR_INT_MESSAGE;
        msg.obj = IntegerResult;
        YourActivity.this.handler.sendMessage(msg);
    }

并在您的MainActivity上实现处理程序

public Handler handler;

handler = new Handler() {
    @Override
    public void handleMessage(android.os.Message msg) {
        if (msg.what == YOUR_INT_MESSAGE) {
            int i=0;
            IntegerResult = msg.obj;
            while (!fileparts.isEmpty()  ) { //&& !fileparts1.isEmpty() && (flag == false)
                String[] myStringArray = new String[IntegerResult];
                for (int e=0; e<IntegerResult; e++){
                     if (fileToReceive != null && !fileparts.isEmpty() ){
                         fileToReceive = fileparts.peek();
                         myStringArray[e] =  fileToReceive;
                         fileToReceive = fileparts.remove();
                     } else {
                         myStringArray[e] =  " ";
                 }
                 System.out.println("myStringArray["+e+"] " + myStringArray[e]);
             }
        }
    }
}

我现在无法测试上面的代码，但是如果要使用Handler方法，它将像那样。

关于java - 如何将数据从线程发送到主要 Activity ，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/16609956/