无法生成Google图表QR码并将其另存为位图

twist3r

我有此代码..获取QRcode的功能不是我的..我在互联网上的某个地方找到了它。

public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_task_detail,
            container, false);


        TextView details = (TextView) rootView.findViewById(R.id.task_detail);
        details.setText(mCompletedTask.awardDescription);

        Bitmap bmp = generateQrcode();
        //details.setBackground(new BitmapDrawable(getResources(),bmp));



    return rootView;
}
private Bitmap generateQrcode() {
    URL aURL;


    try {
        aURL = new URL("http://chart.apis.google.com//chart?chs=150x150&cht=qr&chl=Hello%20afdpf");
        URLConnection conn = aURL.openConnection();
        conn.connect();
        InputStream is = conn.getInputStream();
        BufferedInputStream bis = new BufferedInputStream(is);
        Bitmap bm = BitmapFactory.decodeStream(bis);
        bis.close();
        is.close();


        return bm;
    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return null;
}

TextView XML ...

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/task_detail"
android:contentDescription="@string/taskdetail"
style="?android:attr/textAppearanceLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="16dp"
android:textIsSelectable="true"
tools:context=".taskDetailFragment" />

我从Eclipse LogCat获得此错误..我的应用程序停止响应

 09-06 22:48:44.342: W/dalvikvm(4258): threadid=1: thread exiting with uncaught exception (group=0x4106a2a0)
09-06 22:48:44.392: E/AndroidRuntime(4258): FATAL EXCEPTION: main
09-06 22:48:44.392: E/AndroidRuntime(4258): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.city2/com.example.city2.taskDetailActivity}: android.os.NetworkOnMainThreadException
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2092)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2117)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.app.ActivityThread.access$700(ActivityThread.java:134)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1218)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.os.Looper.loop(Looper.java:137)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.app.ActivityThread.main(ActivityThread.java:4867)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at java.lang.reflect.Method.invokeNative(Native Method)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at java.lang.reflect.Method.invoke(Method.java:511)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:774)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at dalvik.system.NativeStart.main(Native Method)
09-06 22:48:44.392: E/AndroidRuntime(4258): Caused by: android.os.NetworkOnMainThreadException
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1118)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at java.net.InetAddress.getAllByName(InetAddress.java:214)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:315)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at libcore.net.http.HttpEngine.connect(HttpEngine.java:310)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:289)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:239)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:80)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at com.example.city2.taskDetailFragment.generateQrcode(taskDetailFragment.java:89)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at com.example.city2.taskDetailFragment.onCreateView(taskDetailFragment.java:73)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.support.v4.app.Fragment.performCreateView(Fragment.java:1460)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:911)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:551)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1178)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.app.Activity.performStart(Activity.java:5057)
09-06 22:48:44.392: E/AndroidRuntime(4258):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2065)
09-06 22:48:44.392: E/AndroidRuntime(4258):     ... 11 more
09-06 22:48:54.472: I/Process(4258): Sending signal. PID: 4258 SIG: 9

有任何想法吗 ??我想这与HTTP连接器有关

安迪·雷斯

您得到了一个android.os.NetworkOnMainThreadException,这是因为您正在尝试从UI线程执行网络操作。从Android 3.0及更高版本开始,从UI线程执行网络操作的任何尝试都将引发该异常。

解决方案是generateQrCode()在单独的线程中运行方法,例如在AsyncTask或中IntentService

本文收集自互联网,转载请注明来源。

如有侵权,请联系 [email protected] 删除。

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