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我创建了一个活动，之后我创建了一个线程，它从电话簿中读取数据，进行一些字符串操作并根据规则在主 UI 上创建各种按钮。

我有下面的代码，但有一些应用程序如何终止。

谁能帮帮我吗。

public class Phone extends Activity {
    /** Called when the activity is first created. */
    ProgressDialog pbarDialog;
    LinearLayout ll;
    Button b;

    @Override    
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ScrollView sv = new ScrollView(this);
        ll = new LinearLayout(this);
        ll.setOrientation(LinearLayout.VERTICAL);
        sv.addView(ll);
        setContentView(sv);
        pbarDialog = new ProgressDialog(this);
        pbarDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        pbarDialog.setMessage("Reading from Phone Book");
        pbarDialog.setCancelable(false);
        pbarDialog.show();
        pbarDialog.incrementProgressBy(0);     



        new TheTask().execute();                       

    }


    private class TheTask extends AsyncTask<Void, Integer, Void>{

        @Override
        protected void onPreExecute() {
            pbarDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
            pbarDialog.setMessage("Reading from Phone Book");
            pbarDialog.setCancelable(false);
            pbarDialog.show();
            pbarDialog.incrementProgressBy(0);         
        }

        @Override
        protected Void doInBackground(Void... params) {
            ReadPhoneBook();
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            pbarDialog.dismiss();
        }

    }    



    private void ReadPhoneBook() {
        int i=0;             
        int count=0;
        //this is a temp function, it just creates buttons, does not read the phone book.
        for (i=0;i<10;i++)
        {           
            b = new Button(this);
            b.setText("Testing");            
            b.setId(1);
            final Activity self = this;
            b.setOnClickListener(new OnClickListener(){
                @Override
                public void onClick(View v){
                    initiateACall(v,self);
                }
            });
            ll.addView(b);  
            if (i%3 == 0){
                pbarDialog.incrementProgressBy(30*i/3);
            }
        }

    }

我收到以下错误：

util.concurrent.FutureTask.run(FutureTask.java:137) 06-24 21:52:36.436: 错误/AndroidRuntime(297): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068) 06-24 21:52:36.436: ERROR/AndroidRuntime(297): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561) 06-24 21:52:36.436: ERROR/AndroidRuntime(297): at java .lang.Thread.run(Thread.java:1096) 06-24 21:52:36.436: ERROR/AndroidRuntime(297): Caused by: android.view.ViewRoot$CalledFromWrongThreadException: 只有创建视图层次结构的原始线程可以触摸它的观点。06-24 21:52:36.436: ERROR/AndroidRuntime(297): at android.view.ViewRoot.checkThread(ViewRoot.java:2802) 06-24 21:52:36.436: ERROR/AndroidRuntime(297): at android. view.ViewRoot.requestLayout(ViewRoot.java:594) 06-24 21:52:36.436:

4

2 回答 2

0

修复了问题。试图从线程更新主活动中的视图。

于 2011-07-31T23:36:13.840 回答
0

这使用 Android 的 AsyncTask 类统计您的线程：

new TheTask().execute();

但是，我不明白您为什么还要盯着新线程：

new Thread(new Runnable(){
            public void run(){          
                //Thread.sleep(5*1000);
                ReadPhoneBook();
                pbarDialog.dismiss();
            }           
        }).start();

为什么不使用其中一个？

于 2011-06-24T21:22:07.757 回答