Question

我的问题是lv.SetAdapter会在此代码中导致强制关闭，但是当我在onCreate或...中使用它时它会起作用。我需要在JIFace之后设置Adapter - ＆gt;打印流程，我该怎么办？谢谢！：）

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);

        webView = new WebView(this);
        WebSettings webSettings = webView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        webView.setWebViewClient(client);
        webView.addJavascriptInterface(iface, "droid");
        webView.loadUrl("http://google.com");
    }

    JIFace iface = new JIFace();
    WebViewClient client = new MyClient();

    class MyClient extends WebViewClient {
        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url); 
            webView.loadUrl("javascript:window.droid.print(document.getElementsByTagName('body')[0].innerHTML);");
        }
    }

    class JIFace {
        public void print(String data) {
            // here application do some processes and then creates an AdapterView with name aa
                ListView lv = (ListView) findViewById(R.id.lv);
    // the problem is it's not possible to setAdapter here... It's not important what's the ArrayAdapter...
                lv.setAdapter(aa);
        }
    }

和我的LogCat：

01-17 11:21:33.990: E/AndroidRuntime(28906): FATAL EXCEPTION: WebViewCoreThread

01-17 11:21:33.990: E/AndroidRuntime(28906): android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:4056)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.view.ViewRootImpl.invalidateChild(ViewRootImpl.java:722)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.view.ViewRootImpl.invalidateChildInParent(ViewRootImpl.java:771)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.view.ViewGroup.invalidateChild(ViewGroup.java:4109)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.view.View.invalidate(View.java:8621)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.view.View.invalidate(View.java:8572)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.widget.AbsListView.resetList(AbsListView.java:1716)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.widget.ListView.resetList(ListView.java:502)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.widget.ListView.setAdapter(ListView.java:442)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at com.example.MainActivity$JIFace.print(MainActivity.java:72)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.webkit.BrowserFrame.stringByEvaluatingJavaScriptFromString(Native Method)
01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.webkit.BrowserFrame.stringByEvaluatingJavaScriptFromString(Native Method)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.webkit.BrowserFrame.loadUrl(BrowserFrame.java:280)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.webkit.WebViewCore.loadUrl(WebViewCore.java:1840)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.webkit.WebViewCore.access$1700(WebViewCore.java:55)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.webkit.WebViewCore$EventHub$1.handleMessage(WebViewCore.java:1162)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.os.Handler.dispatchMessage(Handler.java:99)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.os.Looper.loop(Looper.java:137)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:728)

01-17 11:21:33.990: E/AndroidRuntime(28906):    at java.lang.Thread.run(Thread.java:856)

问题已解决：

我刚刚使用过：

Handler handler;
Runnable r;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);

    Handler = new H
r = new Runnable() {

    @Override
        public void run() {
            // TODO Auto-generated method stub
            // create ArrayAdapter here
                ListView lv = (ListView) findViewById(R.id.lv);
                lv.setAdapter(aa);
    }
};
    webView = new WebView(this);
    WebSettings webSettings = webView.getSettings();
    webSettings.setJavaScriptEnabled(true);
    webView.setWebViewClient(client);
    webView.addJavascriptInterface(iface, "droid");
    webView.loadUrl("http://google.com");
}

JIFace iface = new JIFace();
WebViewClient client = new MyClient();

class MyClient extends WebViewClient {
    @Override
    public void onPageFinished(WebView view, String url) {
        super.onPageFinished(view, url); 
        webView.loadUrl("javascript:window.droid.print(document.getElementsByTagName('body')[0].innerHTML);");
    }
}

class JIFace {
    public void print(String data) {
        // here application do some processes and then creates an AdapterView with name aa
            ListView lv = (ListView) findViewById(R.id.lv);
// the problem is it's not possible to setAdapter here... It's not important what's the ArrayAdapter...
            handler.post(r);
    }
}

ListView.setAdapter导致JIFace打印中的强制关闭

0 个答案: