for-loop服务中的处理程序 [英] Handlers in for-loop Services

问题描述

我在Activity类中使用了以下代码，它工作正常.K已相应更新.但是当我在服务类中使用它时，for循环中的变量k不在等待处理程序.

I used the following code in Activity class, it was working fine.K was updated accordingly. But when I used it in service class, the variable k in for-loop is not waiting for handler.

    for( k=0;k<personsToSend.length;k++) {
                Log.e(TAG,"outside k = "+k);
                new Handler().postDelayed(new Runnable() {
                    public void run() {
                        Log.e(TAG,"Inside k = "+k);
                    }
                }, 1000);
    }

Logcat:

outside  k = 0
outside k = 1
outside  k = 2
outside k = 3
outside k = 4
Inside k = 5
Inside k = 5
Inside k = 5
Inside k = 5
Inside k = 5

如果我尝试通过处理程序中的索引访问数组，它将给出错误ArrayOutOfBoundException.有什么解决办法吗，或者我必须使用JobSheduler或其他工具.

If I try to access array by index inside handler, it gives error ArrayOutOfBoundException. Is there any solution for this or I have to use JobSheduler or something else.

推荐答案

为此使用Runnable.如下.

use Runnable for that. As Following.

int k = 0;
Handler mHandler = new Handler();

初次使用

mHandler.post(runnable);

Runnable runnable=new Runnable() {
    @Override
    public void run() {
        Log.e(TAG,"outside k = "+k);
        if (k == personsToSend.length) {

        }else {
            mHandler.postDelayed(runnable,1000);
        }
        k++;
    }
};

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