java - 为什么我的计时器根本不启动以及它应该如何停止？

Question

我有一个可运行的线程:

Thread serverChecksThread = new Thread(new Runnable() {   
        @Override
        public void run() {
            Looper.prepare();
            Looper l = Looper.myLooper();
            customHandler = new Handler(l);
            customHandler.postDelayed(serverChecksRunnable, 0);
            Looper.loop();
        }
});

Runnable serverChecksRunnable = new Runnable() {
    @Override
    public void run() {
        if (connectedSuccess == true) {
                checkServer = Get(iptouse + "uploadstatus");
        }

        Handler h=new Handler(Looper.getMainLooper());
        h.post(new Runnable() {
            @Override
            public void run() {
                if (connectedSuccess) {
                    if (checkServer != null) {
                        String a = null;
                        try {
                            a = new String(checkServer, "UTF-8");
                            textforthespeacch = a;
                            if (textforthespeacch.contains("upload completed")) {
                                String varr = textforthespeacch.substring(17);
                                String varr1 = textforthespeacch.substring(0, 16);
                                textforthespeacch = varr1;
                                status1.setText("Upload completed" + " " + varr + "%");
                                numberofuploadedfilescounter += 1;
                                uploadedfilescount.setText(("Uploaded Files: " + numberofuploadedfilescounter));
                                MainActivity.this.initTTS();
                            }
                            if (textforthespeacch.contains("uploading") {
                                String[] split = textforthespeacch.split(" ");
                                textforthespeacch = split[0];
                                status1.setText("Uploading" + " " + split[1] + "%");
                                updateTimerThread.start();
                                servercheckCounter += 1;
                                if (servercheckCounter == 1) {
                                    MainActivity.this.initTTS();
                                }
                            }
                        }
                        catch (UnsupportedEncodingException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
        });
        customHandler.postDelayed(serverChecksRunnable,1000);
    }
});

定时器线程:

Thread updateTimerThread = new Thread(new Runnable() {
    @Override
    public void run() {
        try {
            long updatedTime = 0L;
            long timeInMilliseconds = 0L;
            timeInMilliseconds = SystemClock.uptimeMillis() - startTime;
            updatedTime = timeSwapBuff + timeInMilliseconds;
            int secs = (int) (updatedTime / 1000);
            int mins = secs / 60;
            secs = secs % 60;
            int milliseconds = (int) (updatedTime % 1000);
            timerValue.setText("" + mins + ":"
                    + String.format("%02d", secs) + ":"
                    + String.format("%03d", milliseconds));
            customHandler.postDelayed(this, 100);
        }
        catch (Exception err) {
            err.printStackTrace();
        }
    }
});

我想做的是在上传开始时启动计时器。然后当上传完成时停止计时器。

在我添加的Runnable中:

updateTimerThread.start();

在我将文本设置为“正在上传”之后

在到达“上传完成”行时在 Runnable 中:

status1.setText("Upload completed" + " " + varr + "%");

我想让计时器停止，这样我就可以看到每个文件上传所花费的时间。

问题是当它启动计时器线程时程序崩溃我使用了一个断点但找不到原因。

其次，我应该如何让计时器停止？一旦代码到达“上传完成”行，它会自动停止吗？然后在下一个文件上传时我怎样才能让计时器重置并重新开始(这就是为什么我需要在每个“上传”状态下重置时间并重新开始，然后在“上传完成”时再次停止"状态。

这是日志:

09-14 15:36:59.385    2103-2103/com.test.webservertest E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.test.webservertest, PID: 2103
    java.lang.IllegalThreadStateException: Thread already started
            at java.lang.Thread.checkNotStarted(Thread.java:849)
            at java.lang.Thread.start(Thread.java:1059)
            at com.test.webservertest.MainActivity$2$1.run(MainActivity.java:251)
            at android.os.Handler.handleCallback(Handler.java:739)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5274)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:909)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:704)

Answer 1

您是否正在尝试上传文件？，然后使用此 Android Upload Service .使用自动 Android 通知中心进度指示在后台轻松上传文件

public void upload(final Context context) {
final UploadRequest request = new UploadRequest(context,
                                                "custom-upload-id",
                                                "http://www.yoursite.com/yourscript");

/*
 * parameter-name: is the name of the parameter that will contain file's data.
 * Pass "uploaded_file" if you're using the test PHP script
 *
 * custom-file-name.extension: is the file name seen by the server.
 * E.g. value of $_FILES["uploaded_file"]["name"] of the test PHP script
 */
request.addFileToUpload("/absolute/path/to/your/file",
                        "parameter-name",
                        "custom-file-name.extension",
                        "content-type"));

 try {
    //Start upload service and display the notification
    UploadService.startUpload(request);

 } catch (Exception exc) {
    //You will end up here only if you pass an incomplete UploadRequest
    Log.e("AndroidUploadService", exc.getLocalizedMessage(), exc);
 }

}