如果您想了解java–JSON在Android中的Django回应的相关知识，那么本文是一篇不可错过的文章，我们将对androidjsonobject进行全面详尽的解释，并且为您提供关于Android
如果您想了解java – JSON在Android中的Django回应的相关知识，那么本文是一篇不可错过的文章，我们将对android jsonobject进行全面详尽的解释，并且为您提供关于Android中Django的JSON响应、android中从java中获取图像时android中的java.lang.OutOfMemoryError、Android：android.graphics.Canvas.drawLine(Canvas.java:809)中的java.lang.NullPointerException(可能与我的drawable资源有关)、Android：在Android应用程序中使用来自Gottox的java socket.io客户端的有价值的信息。
本文目录一览：- java – JSON在Android中的Django回应（android jsonobject）
- Android中Django的JSON响应
- android中从java中获取图像时android中的java.lang.OutOfMemoryError
- Android：android.graphics.Canvas.drawLine(Canvas.java:809)中的java.lang.NullPointerException(可能与我的drawable资源有关)
- Android：在Android应用程序中使用来自Gottox的java socket.io客户端
java – JSON在Android中的Django回应（android jsonobject）
我试图从我的基于Django的Web后端获取Android中的jSON响应.
我得到的回应是
03-19 16:32:32.120: I/System.out(7442): This si the response march API <!doctype html> <!--[if IE 7]> <htmllang="en"> <![endif]--> <!--[if IE 8]> <htmllang="en"> <![endif]--> <!--[if gt IE 8]><!--> <htmllang="en"> <!--<![endif]--> <head> <Meta charset="utf-8"> <title>ECOM</title> <Meta http-equiv="X-UA-Compatible" content="IE=Edge;chrome=1" > <Meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0"> <Meta name="description" content=""> <Meta name="author" content=""> <Meta name="apple-mobile-web-app-capable" content="yes" /> <Meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" /> <Meta property="og:image" content="http://www.domain.com/images/logo.png"/> <Meta property="og:title" content="-- description here --"/> <Meta property="og:url" content="http://www.domain.com"/> <link rel="shortcut icon" href="/static/assets/img/favicon.ico" /> <link rel="apple-touch-icon" href="/static/assets/img/apple-touch-icon.png"> <link rel="apple-touch-icon" sizes="72x72" href="/static/assets/img/apple-touch-icon-72x72.png"> <link rel="apple-touch-icon" sizes="114x114" href="/static/assets/img/apple-touch-icon-114x114.png"> <link rel="stylesheet" href="/static/assets/css/styles.css" /> <script src="/static/assets/js/libs/modernizr.custom.60077.js"></script> <link rel="stylesheet" href="/static/assets/css/popup.css" /> <script src="/static/assets/js/jquery-1.7.2.min.js"></script> <script src="/static/assets/authentication/js/popup.js"></script> </head><body><div id="backgroundPopup"></div> <div> <img src="/static/assets/img/Ecomlogo.png"/> </div> <divroll="main" id="main"> <div><a href="/track_me/scan_open/1/">Track Shipment</a> <div> <div> Login </div> <div> <form action="." method="POST"> <div><input type='hidden' name='csrfmiddlewaretoken' value='xpfLvzIES8w6qzpi7kcfp0crWx9aZHGD' /></div> <input type= "text" name ="username" placeholder="Username"/> <input type= "Password" name="password" placeholder="Password"/> <input type="submit"/> <a href="#"id="forgotpass">Forgot Your Password?</a> </form> </div> </div> </div> <div> <div> <div> Ecom Express News </div> <div> </div> </div> </div> </div> <!-- modal --> <divid="add-revlet"> <div> <adata-dismiss="modal">×</a> <h3>Record</h3> </div> <div> </div> </div><!--modal end--> <div id="popupContact"> <a id="popupContactClose">x</a> </div> <!-- uncomment pre-deloy --> <!--<script src="//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>--> <script>window.jQuery || document.write('<script src="assets/js/libs/jquery-1.7.1.min.js"><\/script>')</script> <!-- bootstrap --> <script src="/static/assets/js/bootstrap-transition.js"></script> <script src="/static/assets/js/bootstrap-alert.js"></script> <script src="/static/assets/js/bootstrap-modal.js"></script> <script src="/static/assets/js/bootstrap-dropdown.js"></script> <script src="/static/assets/js/bootstrap-scrollspy.js"></script> <script src="/static/assets/js/bootstrap-tab.js"></script> <script src="/static/assets/js/bootstrap-tooltip.js"></script> <script src="/static/assets/js/bootstrap-popover.js"></script> <script src="/static/assets/js/bootstrap-button.
Android请求
private String GetPickUpDetails(String pick_up_id2) {
StringBuilder response = new StringBuilder();
String stringUrl=Constants.PICKUP_DETAILS+pick_up_id2+"/";
URL url;
try {
url = new URL(stringUrl);
HttpURLConnection httpconn = (HttpURLConnection)url.openConnection();
if (httpconn.getResponseCode() == HttpURLConnection.HTTP_OK)
{
BufferedReader input = new BufferedReader(new InputStreamReader(httpconn.getInputStream()),8192);
String strLine = null;
while ((strLine = input.readLine()) != null)
{
response.append(strLine);
}
input.close();
}
} catch (Exception e) {
// Todo Auto-generated catch block
e.printstacktrace();
}
System.out.println("This si the response march API "+response.toString()+" for url"+stringUrl);
return response.toString();
}
Django Views代码
def pickup_details(request,id):
awb_dict={}
if request.POST:
print "this is post request",id
shipment_records=[]
shippments=Shipment.objects.filter(pickup_id=id)
for obj in shippments:
awb=obj.airwaybill_number
order_number=obj.order_number
pincode=obj.pincode
dest_sc=obj.service_centre
type=obj.product_type
if(type == "ccd"):
col_val=obj.collectable_value
else:
col_val=""
status=obj.status
city=obj.destination_city
act_wt=obj.actual_weight
dest_SC="hi"
dest_SC=obj.service_centre
#dest_SC=String(dest_SC).replace('-',' ')
record={"awb":awb,"ordernumber":order_number,"pincode":pincode,"weight":act_wt,"status":status,"city":city,"type":type,"col_value":col_val,"dest_SC":city}
shipment_records.append(record)
awb_dict["count"]=len(shipment_records)
awb_dict["shipments"]=shipment_records
#else:
#pass
return HttpResponse(simplejson.dumps(awb_dict) )
我不太确定,为什么我没有得到预期的jSON响应.在手动点击url后,我按预期获得了JSON响应
编辑1
我也试过这种方法
try{
URL url = new URL(stringUrl);
HttpURLConnection httpconn = (HttpURLConnection)url.openConnection();
if (httpconn.getResponseCode() == HttpURLConnection.HTTP_OK)
{
BufferedReader input = new BufferedReader(new InputStreamReader(httpconn.getInputStream()),8192);
String strLine = null;
while ((strLine = input.readLine()) != null)
{
response.append(strLine);
}
input.close();
}
}catch (Exception e) {
// Todo Auto-generated catch block
e.printstacktrace();
}
return response.toString();
}
编辑2
我得到的错误是在尝试发送请求时HTTP 403请求,因为值未到达API调用
编辑3
我得到的HTTP响应为200.httpentity实体的值= response.getEntity();代码是org.apache.http.conn.BasicMangedEntity@4055505d0
解决方法:
响应是将我重定向到我使用@csrf_exempt的自定义登录页面.处理信息的代码需要进一步的登录详细信息.我添加了login参数以及我的调用,并获得了所需的响应
Android中Django的JSON响应
我正在尝试从基于Django的Web后端在Android中获得jSON响应。我得到的回应是
03-19 16:32:32.120: I/System.out(7442): This si the response march API <!doctype html> <!--[if IE 7]> <htmllang="en"> <![endif]--> <!--[if IE 8]> <htmllang="en"> <![endif]--> <!--[if gt IE 8]><!--> <htmllang="en"> <!--<![endif]--> <head> <meta charset="utf-8"> <title>ECOM</title> <meta http-equiv="X-UA-Compatible" content="IE=Edge;chrome=1" > <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0"> <meta name="description" content=""> <meta name="author" content=""> <meta name="apple-mobile-web-app-capable" content="yes" /> <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" /> <meta property="og:image" content="http://www.domain.com/images/logo.png"/> <meta property="og:title" content="-- description here --"/> <meta property="og:url" content="http://www.domain.com"/> <link rel="shortcut icon" href="/static/assets/img/favicon.ico" /> <link rel="apple-touch-icon" href="/static/assets/img/apple-touch-icon.png"> <link rel="apple-touch-icon" sizes="72x72" href="/static/assets/img/apple-touch-icon-72x72.png"> <link rel="apple-touch-icon" sizes="114x114" href="/static/assets/img/apple-touch-icon-114x114.png"> <link rel="stylesheet" href="/static/assets/css/styles.css" /> <script src="/static/assets/js/libs/modernizr.custom.60077.js"></script> <link rel="stylesheet" href="/static/assets/css/popup.css" /> <script src="/static/assets/js/jquery-1.7.2.min.js"></script> <script src="/static/assets/authentication/js/popup.js"></script> </head><body><div id="backgroundPopup"></div> <div> <img src="/static/assets/img/Ecomlogo.png"/> </div> <divroll="main" id="main"> <div><a href="/track_me/scan_open/1/">Track Shipment</a> <div> <div> Login </div> <div> <form action="." method="POST"> <divdisplay:none''><input type=''hidden'' name=''csrfmiddlewaretoken'' value=''xpfLvzIES8w6qzpi7kCFp0crWx9aZHGD'' /></div> <input type= "text" name ="username" placeholder="Username"/> <input type= "Password" name="password" placeholder="Password"/> <input type="submit"/> <a href="#"id="forgotpass">Forgot Your Password?</a> </form> </div> </div> </div> <div> <div> <div> Ecom Express News </div> <div> </div> </div> </div> </div> <!-- modal --> <divid="add-revlet"> <div> <adata-dismiss="modal">×</a> <h3>Record</h3> </div> <div> </div> </div><!--modal end--> <div id="popupContact"> <a id="popupContactClose">x</a> </div> <!-- uncomment pre-deloy --> <!--<script src="//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>--> <script>window.jQuery || document.write(''<script src="assets/js/libs/jquery-1.7.1.min.js"><\/script>'')</script> <!-- bootstrap --> <script src="/static/assets/js/bootstrap-transition.js"></script> <script src="/static/assets/js/bootstrap-alert.js"></script> <script src="/static/assets/js/bootstrap-modal.js"></script> <script src="/static/assets/js/bootstrap-dropdown.js"></script> <script src="/static/assets/js/bootstrap-scrollspy.js"></script> <script src="/static/assets/js/bootstrap-tab.js"></script> <script src="/static/assets/js/bootstrap-tooltip.js"></script> <script src="/static/assets/js/bootstrap-popover.js"></script> <script src="/static/assets/js/bootstrap-button.Android请求
private String GetPickUpDetails(String pick_up_id2) { StringBuilder response = new StringBuilder(); String stringUrl=Constants.PICKUP_DETAILS+pick_up_id2+"/"; URL url; try { url = new URL(stringUrl); HttpURLConnection httpconn = (HttpURLConnection)url.openConnection(); if (httpconn.getResponseCode() == HttpURLConnection.HTTP_OK) { BufferedReader input = new BufferedReader(new InputStreamReader(httpconn.getInputStream()),8192); String strLine = null; while ((strLine = input.readLine()) != null) { response.append(strLine); } input.close(); } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println("This si the response march API "+response.toString()+" for url"+stringUrl); return response.toString(); }Django Views代码
def pickup_details(request,id): awb_dict={} if request.POST: print "this is post request",id shipment_records=[] shippments=Shipment.objects.filter(pickup_id=id) for obj in shippments: awb=obj.airwaybill_number order_number=obj.order_number pincode=obj.pincode dest_sc=obj.service_centre type=obj.product_type if(type == "ccd"): col_val=obj.collectable_value else: col_val="" status=obj.status city=obj.destination_city act_wt=obj.actual_weight dest_SC="hi" dest_SC=obj.service_centre #dest_SC=String(dest_SC).replace(''-'','' '') record={"awb":awb,"ordernumber":order_number,"pincode":pincode,"weight":act_wt,"status":status,"city":city,"type":type,"col_value":col_val,"dest_SC":city} shipment_records.append(record) awb_dict["count"]=len(shipment_records) awb_dict["shipments"]=shipment_records #else: #pass return HttpResponse(simplejson.dumps(awb_dict) )我不太确定，为什么我没有得到预期的jSON响应。手动点击网址后，我得到了预期的JSON响应
编辑1 我也尝试过这种方法
try{ URL url = new URL(stringUrl); HttpURLConnection httpconn = (HttpURLConnection)url.openConnection(); if (httpconn.getResponseCode() == HttpURLConnection.HTTP_OK) { BufferedReader input = new BufferedReader(new InputStreamReader(httpconn.getInputStream()),8192); String strLine = null; while ((strLine = input.readLine()) != null) { response.append(strLine); } input.close(); } }catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return response.toString();}编辑2 我收到的错误是 HTTP 403请求 ，尝试发送发送的请求，因为该值未达到API调用
编辑3 我得到的HTTP响应为200. HttpEntity entity =response.getEntity();代码的值为org.apache.http.conn.BasicMangedEntity@4055505d0
答案1
小编典典响应将我重定向到我曾经使用过的自定义登录页面@csrf_exempt。代码需要进一步的登录详细信息才能处理该信息。我在通话中添加了登录参数，并获得了所需的响应
android中从java中获取图像时android中的java.lang.OutOfMemoryError
我正在使用代码从图库中选择一张图片
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gallery);
Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, SELECT_PICTURE);
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == SELECT_PICTURE && resultCode == RESULT_OK && null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.movetoFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
picturePath = cursor.getString(columnIndex);
cursor.close();
Log.v("picturePath", "picturePath: " + picturePath);
Bitmap bitmap = BitmapFactory.decodeFile(picturePath);
Intent intentUpload = new Intent(galleryActivity.this, UploadActivity.class);
// intentUpload.putExtra("BitmapImage", bitmap);
MyApplicationGlobal.bitmap = bitmap;
startActivity(intentUpload);
finish();
}
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.movetoFirst();
return cursor.getString(column_index);
}
但是我收到了错误
FATAL EXCEPTION: main
java.lang.OutOfMemoryError
at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:493)
at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:299)
at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:324)
at com.markphoto_activities.galleryActivity.onActivityResult(galleryActivity.java:59)
at android.app.Activity.dispatchActivityResult(Activity.java:4541)
at android.app.ActivityThread.deliverResults(ActivityThread.java:2740)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:2787)
at android.app.ActivityThread.access$2000(ActivityThread.java:122)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1032)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:132)
at android.app.ActivityThread.main(ActivityThread.java:4025)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
at dalvik.system.NativeStart.main(Native Method)
Log-cat是
: E/dalvikvm-heap(2487): Out of memory on a 17915920-byte allocation.
"main" prio=5 tid=1 RUNNABLE
| group="main" sCount=0 dsCount=0 obj=0x400d5638 self=0x126c8
| sysTid=2487 nice=0 sched=0/0 cgrp=default handle=-1342909336
| schedstat=( 2650512000 283442000 1204 ) utm=226 stm=39 core=1
at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:493)
at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:299)
at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:324)
at com.markphoto_activities.galleryActivity.onActivityResult(galleryActivity.java:59)
at android.app.Activity.dispatchActivityResult(Activity.java:4541)
at android.app.ActivityThread.deliverResults(ActivityThread.java:2740)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:2787)
at android.app.ActivityThread.access$2000(ActivityThread.java:122)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1032)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:132)
at android.app.ActivityThread.main(ActivityThread.java:4025)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
at dalvik.system.NativeStart.main(Native Method)
: D/skia(2487): libjpeg error 105 < Ss=%d, Se=%d, Ah=%d, Al=%d> from allocPixelRef [3456 2592]
: D/skia(2487): --- decoder->decode returned false
: D/AndroidRuntime(2487): Shutting down VM
解决方法:
尝试这个 ：
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent imageReturnedIntent) {
super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
switch (requestCode) {
case SELECT_PHOTO:
if (resultCode == RESULT_OK) {
Uri selectedImage = imageReturnedIntent.getData();
try {
picImageView.setimageBitmap(decodeUri(selectedImage));
} catch (FileNotFoundException e) {
e.printstacktrace();
}
}
}
}
然后声明以下函数：
private Bitmap decodeUri(Uri selectedImage) throws FileNotFoundException {
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(
getContentResolver().openInputStream(selectedImage), null, o);
final int required_SIZE = 100;
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp / 2 < required_SIZE || height_tmp / 2 < required_SIZE) {
break;
}
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
return BitmapFactory.decodeStream(
getContentResolver().openInputStream(selectedImage), null, o2);
}
谢谢.
Android：android.graphics.Canvas.drawLine(Canvas.java:809)中的java.lang.NullPointerException(可能与我的drawable资源有关)
我正在尝试在每列中构建一个包含7列和24个TextView的子视图.
当我的活动开始时,我得到一个异常,它在堆栈跟踪中的任何地方都没有我的包.
这是24个文本视图中每个视图的背景可绘制资源
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item><shape><solid android:color="#CCC"/></shape></item>
<item android:top=".5pt" android:bottom=".5pt">
<shape android:shape="line">
<size android:height="1pt" android:color="#CCC" android:dashWidth="1pt" android:dashGap="1pt" />
</shape>
</item>
</layer-list>
在发生这种情况之前,cpu会在一两秒内达到100％.
我正在使用Android 2.2的模拟器
这是我的例外.
01-26 16:51:38.084: ERROR/AndroidRuntime(955): FATAL EXCEPTION: main 01-26 16:51:38.084: ERROR/AndroidRuntime(955): java.lang.NullPointerException 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.graphics.Canvas.drawLine(Canvas.java:809) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.graphics.drawable.GradientDrawable.draw(GradientDrawable.java:347) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.graphics.drawable.LayerDrawable.draw(LayerDrawable.java:320) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.View.draw(View.java:6725) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.drawChild(ViewGroup.java:1640) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.drawChild(ViewGroup.java:1638) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.drawChild(ViewGroup.java:1638) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.drawChild(ViewGroup.java:1638) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.View.draw(View.java:6846) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.widget.FrameLayout.draw(FrameLayout.java:352) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.View.buildDrawingCache(View.java:6502) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.onAnimationStart(ViewGroup.java:1253) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.drawChild(ViewGroup.java:1499) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.drawChild(ViewGroup.java:1638) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.View.draw(View.java:6743) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.drawChild(ViewGroup.java:1640) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.View.draw(View.java:6743) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.widget.FrameLayout.draw(FrameLayout.java:352) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.drawChild(ViewGroup.java:1640) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.View.draw(View.java:6743) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.widget.FrameLayout.draw(FrameLayout.java:352) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1842) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewRoot.draw(ViewRoot.java:1407) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewRoot.performTraversals(ViewRoot.java:1163) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.view.ViewRoot.handleMessage(ViewRoot.java:1727) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.os.Handler.dispatchMessage(Handler.java:99) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.os.Looper.loop(Looper.java:123) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at android.app.ActivityThread.main(ActivityThread.java:4627) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at java.lang.reflect.Method.invokeNative(Native Method) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at java.lang.reflect.Method.invoke(Method.java:521) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 01-26 16:51:38.084: ERROR/AndroidRuntime(955): at dalvik.system.NativeStart.main(Native Method)
编辑
将大小重命名为笔划可以消除崩溃,但我没有得到虚线.我想要在drawable的中间或底部有一条水平虚线.
解决方法
发生崩溃是因为GradientDrawable.mstrokePaint为null,这又是因为你没有指定< stroke>在您的XML中.
改变< size>至< stroke>将修复它,但您还需要将笔触颜色更改为与背景颜色不同,即：
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item><shape><solid android:color="#CCC"/></shape></item>
<item android:top=".5pt" android:bottom=".5pt">
<shape android:shape="line">
<stroke android:height="1pt" android:color="#FF000000" android:dashWidth="1pt" android:dashGap="1pt" />
</shape>
</item>
</layer-list>
Android：在Android应用程序中使用来自Gottox的java socket.io客户端
好吧,我正在编写一个
Android应用程序,我想使用Gottox编写的
Socket.IO-Client for Java. github中的文档特别说该库与android兼容.
现在我的问题有点基础了.如何在Android应用程序中使用该库？
到目前为止,我尝试了两种方法.
>我使用命令构建了该库的jar文件(如上所述)
在图书馆的文件中)
cd $PATH_TO_SOCKETIO_JAVA ant jar ls jar/socketio.jar
我在文件夹中有一个很好的jar库.我把罐子加到了我的身上
项目使用
RIGHT_CLICK->Properties->Java Build Path->Add External Jars
然后我用连接
SocketIO socket = new SocketIO("http://"+ip+":"+port+"/");
我能够编译和构建我的应用程序没有任何错误.但是当我跑步时,我在上面发布的那条线上有一个例外.
java.lang.NoClassDefFoundError: io.socket.socketIO
at com.research.socketioresearch.LoginActivity.connectToSocketIO(LoginActivity.java:122)
at com.research.socketioresearch.LoginActivity$1.handleMessage(LoginActivity.java:113)
>作为第二次尝试,我使用socket.io创建了一个java项目
我日食中的库源代码.然后我将该项目导出为
jar文件使用
RIGHT_CLICK->export->java->Jar File
然后我使用the将jar文件添加到我原来的android项目中
我在方法1(添加外部罐子)中尝试的方式相同.这次我也能够
编译和构建,但在相同的行中获得相同的异常
码.
现在有人成功在android中使用相同的库吗？怎么做的？
解决方法
好吧,我让它自己工作..
>使用我在问题中提到的第一种方法,你会得到一个罐子
文件在路径中
PATH_TO_SOCKETIO_JAVA/jar/socket.jar
>现在在你的android项目中,创建一个名为“libs”的文件夹(如果是的话)
还没有)
>将该jar文件复制到’libs’文件夹.
>转到eclipse并刷新android项目.
我仍然不确定为什么在项目属性中使用“添加外部JAR”按钮添加jar文件不起作用.两者都将库添加到项目中吗？
关于java – JSON在Android中的Django回应和android jsonobject的介绍已经告一段落，感谢您的耐心阅读，如果想了解更多关于Android中Django的JSON响应、android中从java中获取图像时android中的java.lang.OutOfMemoryError、Android：android.graphics.Canvas.drawLine(Canvas.java:809)中的java.lang.NullPointerException(可能与我的drawable资源有关)、Android：在Android应用程序中使用来自Gottox的java socket.io客户端的相关信息，请在本站寻找。
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