只有创建一个视图层次可以触摸它views.onProgressUpdate原来的线程

问题描述

在Android 4.0开始我有问题（在2.3.6这是工作）

onProgressUpdate 应该已在UI线程。
我曾尝试 activity.runOnUiThread 现与处理程序版本，OFC首先是没有任何艾德里安的。如何解决呢？

 公共类ReadDataTask扩展的AsyncTask＆LT;字符串，字符串，JSONArray＆GT; {    私人活动活动;
    保护ProgressDialog DLG;    私人长期startRead，endRead，endJson;    公共ReadDataTask（活动活动）{
        this.activity =活动;
        DLG =新ProgressDialog（活动）;
    }    @覆盖
    在preExecute保护无效（）{
        super.on preExecute（）;
        dlg.show（）;
        startRead = System.currentTimeMillis的（）;
    }    @覆盖
    保护无效onProgressUpdate（字符串值...）{
        super.onProgressUpdate（值）;
        如果（值=空＆放大器;！＆放大器; values​​.length大于0）{
            最后弦乐味精=值[0];
            新的处理程序（）。后（新的Runnable（）{
                公共无效的run（）{
                    dlg.setMessage（MSG）; // android.view.ViewRootImpl $ CalledFromWrongThreadException：只有创建视图层次可以触摸其观点原来的线程。
                }
            }）;
        }
    }
    @覆盖
    保护JSONArray doInBackground（字符串... PARAMS）{
           ......长在这里的任务
           publishProgress（转换为JSON：+（1 + I）+/+ dataList.size（））;
 

解决方案

在preExecute创建处理程序只有在键（）这是从UI线程调用和保存在 onProgressUpdate对它的引用，比邮寄给它（）。

处理器帖子线程，它已经创建的。

Starting from Android 4.0 I have the problem ( on 2.3.6 it is working).

onProgressUpdate it should be already in UI thread.I have tried activity.runOnUiThread now is with a Handler version, ofc first was without any of tham. How to fix it?

public class ReadDataTask extends AsyncTask<String, String, JSONArray> {

    private Activity activity;
    protected ProgressDialog dlg;

    private long startRead, endRead, endJson;

    public ReadDataTask(Activity activity) {
        this.activity = activity;
        dlg = new ProgressDialog(activity);
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        dlg.show();
        startRead = System.currentTimeMillis();
    }

    @Override
    protected void onProgressUpdate(String... values) {
        super.onProgressUpdate(values);
        if (values != null && values.length > 0) {
            final String msg = values[0];
            new Handler().post(new Runnable() {
                public void run() {
                    dlg.setMessage(msg);// android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
                }
            });
        }
    }


    @Override
    protected JSONArray doInBackground(String... params) {
           ... long task here
           publishProgress("Converting to JSON: " + (1 + i) + " / " + dataList.size());

解决方案

Create handler only once in onPreExecute() which is called from UI thread and save a reference to it, than post to it in onProgressUpdate().

Handler posts to thread that it has been created on.

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