CalledFromWrongThreadException:只有创建视图层次结构的原始线程才能触摸视图 [英] CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch views

问题描述

我在 Android 中遇到以下错误:

I have an issue with the following error in Android:

CalledFromWrongThreadException;:仅创建一个的原始线程视图层次结构可以触摸它的视图

CalledFromWrongThreadException;: Only the original thread that created a view hierarchy can touch its views

当我尝试更新我的 Activity 中的 TextView 时，似乎发生了这种情况，更新 TextView 的调用来自我的 Activity，但我仍然收到上述错误.

It appears to happen when I try to update a Textview in my Activity, the call to update the TextView is from within my Activity but I still get the above error.

我是这样的:

onCreate()- 设置按钮和文本视图.

onCreate() -sets up the buttons and the text view.

onStateChange() - 状态更改通知的侦听器，如果将 TextView 更改为某些不同的文本，则会收到通知.

onStateChange() - a listener for notifications about state changes, when this gets notification if changes the TextView to say some different text.

当我收到新文本的通知时，我尝试像这样更改 TextView:

When I get notification of a new text I try to change the TextView as so:

((TextView)findViewById(R.id.title)).setText("Some Text");

但是我得到了上面的错误.

But I get the above Error.

从谷歌搜索来看，我似乎应该使用处理程序来更改 TextView 或者使用 AsyncTask?

From googling it, it appears I should use a handler to change the TextView or maybe use AsyncTask?

谁能解释一下哪个更好用，为什么?

Could anyone explain which one would be better to use and why?

添加代码片段:

     public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);  

            setContentView(R.layout.my);

            getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.my_title);  

            ((TextView)findViewById(R.id.time)).setText("Hello Text");


            findViewById(R.id.keyboardimage).setOnClickListener(new OnClickListener() {
                public void onClick(View v) {

                    Intent dialIntent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:"));
                    startActivity(dialIntent);

                        dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN,KeyEvent.FLAG_SOFT_KEYBOARD));
                        dispatchKeyEvent(new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_BACK));       
                }
        });

     }

<小时>

//CallBacks from running Service

private final ICallDialogActivity.Stub iCallDialogActivity = new ICallDialogActivity.Stub(){

@Override
public void onStateChanged(int callState)
                throws RemoteException {    
            switch(callState){
            case GlobalData.CALL_STATUS_IDLE:

                break;

            case GlobalData.CALL_STATUS_DISCONNECTING:
                byeSetup();
                break;
    } 

};

<小时>

public void byeSetup(){

            ((TextView)findViewById(R.id.time)).setText("Bye Text");

            findViewById(R.id.keyboardimage).setOnClickListener(new OnClickListener() {
                public void onClick(View v) {
                    //Void the Button
                }});
}

推荐答案

看起来您走错了话题.尝试使用处理程序在正确的线程上更新 GUI.请参阅 android.com 上的在 UI 线程中处理昂贵的操作 示例.基本上，您可以将 byeSetup 包装在 Runnable 中，并使用 Handler 实例调用它.

Look like you are on the wrong thread. Try using a Handler to update the GUI on the right thread. See Handling Expensive Operations in the UI Thread example from android.com. Basically you would wrap byeSetup in a Runnable and invoke it with a Handler instance.

Handler refresh = new Handler(Looper.getMainLooper());
refresh.post(new Runnable() {
    public void run()
    {
        byeSetup();
    }
});

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