小编Mat*_*teo的帖子

假设我有一个这样的表格:

<form action="page.php" method="post">

    Section1: <input name="section1" type="text"></br>
    Section2: <input name="section2" type="text"></br>

    Text:</br>
    <textarea name="post_text" cols="100" rows="20"></textarea>

    <input name="submit" type="submit" value="Submit">

</form>

通常,如果我希望保存插入表单字段中的内容,我将使用此语句:

Section1: <input name="section1" type="text" vale="value="<?php echo $_POST['section1']; ?>""></br>

这样,如果我在提交中出错(错误控制代码未发布),将保留插入的值,并且无需重新插入它们.

但是在textarea标签中使用它不会产生所需的结果.

关于怎么做的任何想法？

提前致谢!

我在这两个链接中遇到了同样的问题:一,二.我需要计算图像中小ROI的像素强度平均值.

我选择了ROI并将图像复制到其中,所以现在我需要计算像素平均强度,避免所有像素上的循环.

链接中提供的答案建议使用,CvScalar c = cvAvg(img);但我无法使用C++接口找到等效的.

你能指点一下吗？我在文档中找不到它!

E/ActivityThread(  655): Activity com.android.internal.app.ChooserActivity has
leaked IntentReceiver com.android.internal.app.ResolverActivity$1@412f4f38 
that was originally registered here. 

Are you missing a call to unregisterReceiver()? E/ActivityThread(  655): 
android.app.IntentReceiverLeaked: 
Activity com.android.internal.app.ChooserActivity has leaked IntentReceiver 
com.android.internal.app.ResolverActivity$1@412f4f38 that was originally 
registered here. Are you missing a call to unregisterReceiver()?

1. 这个错误是什么意思？
2. 既然应用程序继续工作,我应该忽略它吗？
3. 我该如何解决？

当我在此处发布的例程后从手机图库中选择图像时,会发生这种情况.正是当我按下活动布局中定义的浏览图库按钮时.

完整的LOGCAT:

E/ActivityThread(  655):    at android.app.LoadedApk$ReceiverDispatcher.<init>(LoadedApk.java:763)
E/ActivityThread(  655):    at android.app.LoadedApk.getReceiverDispatcher(LoadedApk.java:567)
E/ActivityThread(  655):    at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:1043)
E/ActivityThread(  655):    at android.app.ContextImpl.registerReceiver(ContextImpl.java:1030)
E/ActivityThread(  655):    at android.app.ContextImpl.registerReceiver(ContextImpl.java:1024)
E/ActivityThread(  655):    at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:341)
E/ActivityThread(  655):    at com.android.internal.content.PackageMonitor.register(PackageMonitor.java:65)
E/ActivityThread(  655):    at com.android.internal.app.ResolverActivity.onCreate(ResolverActivity.java:99) …

这是我的代码:

boolean success = false;
Log.d(TAG, Environment.getExternalStorageDirectory() + "/" + Environment.DIRECTORY_PICTURES + "/myFolder" );
myFolder = new File( Environment.getExternalStorageDirectory() + "/" + Environment.DIRECTORY_PICTURES + "/myFolder" );

if( myFolder.exists() ){
    Log.d(TAG, "FOLDER EXISTS");
}else{

    success = myFolder.mkdir();

    if( success ){
        // Do something on success

    } else {
        // Do something else on failure 
        throw new RuntimeException("File Error in writing new folder");
}

怎么了？

运行它将HTC Desire HD - android 2.3.5导致此输出:

D/DVA_HLUI Application(25723): /mnt/sdcard/Pictures/myFolder
E/AndroidRuntime(25723): FATAL EXCEPTION: main
E/AndroidRuntime(25723): java.lang.RuntimeException: …