java - 为什么代码被调用2次？ Java Android 线程处理程序

Question

当进度条状态达到 100 时，我尝试运行一些代码 fragment 。(在本例中为 diggingStatus) 但由于某种原因 Log.d 代码被调用了 2 次而不是 1 次。我猜我的 if(diggingStatus==100) 条件放错了地方。

 new Thread(new Runnable() {
                    private Handler diggingHandler = new Handler();

                    @Override
                    public void run() {
                        while(diggingStatus < 100){
                            // Update the progress status
                            diggingStatus +=1;

                            try{
                                Thread.sleep(100);
                            }catch(InterruptedException e){
                                e.printStackTrace();
                            }

                            // Update the progress bar
                            diggingHandler.post(new Runnable() {
                                @Override
                                public void run() {
                                    diggingbar.setProgress(diggingStatus);
                                    if(diggingStatus==100){
    //Run this code when progress is completed.
    Log.d("i got called","i got called "); //Why this is called 2 times? 


                                    }
                                }
                            });
                        }




                }
            }).start();

Answer 1

由于您处理异步消息，因此当两者都执行时变量 diggingStatus 已经是 100。

您还必须将进度量发送给处理程序，如下所示:

                        final int progress = diggingStatus; //get only the current
                        // Update the progress bar
                        diggingHandler.post(new Runnable() {
                            @Override
                            public void run() {
                                diggingbar.setProgress(progress);
                                if(progress==100)
                                     Log.d("i got called","i got called ");
                            }
                        });