Android TextView is failing with null pointer exception -

-

एंड्रॉइड टेक्स्टव्यू रिक्त सूचक अपवाद के साथ असफल रहा है

और इसके "disp.setText (" 0 ");"

इस विधि के अंदर "संरक्षित शून्य को क्रेट (बंडल से बचाया गया इन्स्टेंसस्टेट) {"

मैंने नेट में दिए गए अधिकांश सुझावों का प्रयास किया अभी भी इसे हल नहीं कर सका।

कृपया मदद की ज़रूरत है ....

मेरा लेआउट: "fragment_main.xml" 

  & lt; रिलेटिव लेआउट xmlns: एंड्रॉयड = "http://schemas.android.com/apk/res/android" xmlns: उपकरण = "http://schemas.android.com/tools" एंड्रॉयड: layout_width = "match_parent" एंड्रॉयड: layout_height = "match_parent" एंड्रॉइड: onClick = "num_Clicked" android: paddingBottom = "@ dimen / activity_vertical_margin" एंड्रॉइड: paddingLeft = "@ dimen / activity_horizontal_margin" एंड्रॉइड: paddingRight = "@ dimen / activity_horizontal_margin" एंड्रॉइड: paddingTop = "@ dimen / activity_vertical_margin" उपकरण: संदर्भ = "Com.ullas.Test1.MainActivity $ प्लेसहोल्डर फ्रेगमेंट" & gt; & LT; TextView एंड्रॉयड: आईडी = "@ + id / textView1" एंड्रॉयड: layout_width = "fill_parent" एंड्रॉयड: layout_height = "wrap_content" एंड्रॉयड: layout_alignParentTop = "true" एंड्रॉयड: layout_centerHorizontal = "true" एंड्रॉयड: layout_marginTop = "17dp" एंड्रॉयड : गुरुत्वाकर्षण = "दाएं" एंड्रॉइड: टेक्स्ट = "बड़ा टेक्स्ट" एंड्रॉइड: टेक्स्ट एपरेरेंस = "? एंड्रॉइड: एटीआर / टेक्स्ट अप्परेंस लार्ज" / & gt; & Lt; / RelativeLayout & gt;   
 और मेरी गतिविधि यह है: "MainActivity.java"  
  आयात करें android.support.v7.app.ActionBarActivity; Import android.support.v4.app.Fragment; Importroid.os.Bundle; आयात करें android.view.LayoutInflater; Import android.view.Menu; आयात करें android.view.MenuItem; आयात करें android.view.View; आयात करें android.view.ViewGroup; Import android.widget। *; सार्वजनिक कक्षा MainActivity ActionBarActivity विस्तार [TextView disp; @ ओवरराइड संरक्षित शून्य को क्रिएट (बंडल सहेजा गया इन्स्टैंसस्टेट) {सुपर.नक्रेट (सहेजे गए इन्स्टेंसस्टेट); setContentView (R.layout.activity_main); Disp = (TextView) findViewById (R.id.textView1); disp.setText ( "0"); अगर (सहेजे गए इन्स्टेंसस्टेट == रिक्त) {getSupportFragmentManager ()। beginTransaction ()। जोड़ें (आर.आईड.कंटेनइयर, नया प्लेसहोल्डर फ्रेगमेंट ())। commit (); }}    
 
 
 आप अपने लेआउट को बताते हैं "fragment_main.xml" और textview इस में है xml।  
 अपने कोड में, आप एक अलग लेआउट xml सेट कर रहे हैं:  
  setContentView (R.layout.activity_main); disp = (TextView) findViewById (R.id.textView1);   
, लेआउट आप उपयोग करना चाहते सेट करना होगा क्रम में अपने TextView तक पहुंचने के लिए सक्षम होने के लिए:  
  setContentView (R.layout.fragment_main); disp = (TextView) findViewById (R.id.textView1);

Comments

Post a Comment

Popular posts from this blog

Pass DB Connection parameters to a Kettle a.k.a PDI table Input step dynamically from Excel -

-
Image
I have a requirement whenever I run my own kettle, dynamically took database connection parameters from an excel source Every run should go. I have an Excel column names: hostname, username, database, password. I want to pass these connection parameters to my table input stage dynamically whenever it runs the job. This is what I was trying to do. You can get it Connection parameters from the DB reading source (for example Excel or a CSV file in my example) < / Li> Store the parameters in the variable Using the variable in your connection's settings. Setting Variables Create another conversion for (you can not do it in the same conversion Uses): set variables element variable: The element that reads / writes your data creates a new connection and sets the connection parameter using $ {variable name_} Note that you will need to type in the field field in the field $ {password} Also keep in mind that this can be a security problem as the
Read more

multithreading - PhantomJS-Node in a for Loop -

-
I am trying to implement a screen-scraps application that opens a URL in which a parameter changes as it is for a loop: var data = [ '100', '101', '102', '103', '104']; (Var indexA = 0; indexA & lt; data.length; indexA ++) for {Phantom Generation ({'port': freeport}, function (pH) {ph.create page (function (page) {page.open ("http: //...++ data [index B] +" ... " , Status {console.log ("open site:" + data [index B], position); / * OLD * / indexB ++; page evaluation (function () {// page scrape and an object Return}, function {console.log (result.dataRequest); // here is the problem}); / * new and fixed * / indexB ++} first console Logs it: Open Site: 100 Success Opens Site: 101 Success B Ola Site: 102 Success Opening Site: 103 Success Opened Site: 104 Success Which is good. Data is verified in scrap HTML and from index to array Matches. So in page 101 I scrap '101 and retrieve' and pu
Read more

c++ - MATLAB .m file to .mex file using Matlab Compiler -

-
I know that it can speak as a very famous topic, but something that helps me with it Not found This scenario is: I have my functions function, no matter what's inside, it's a generic function that may depend on other toolboxes. Does. Has input and output; I want to generate the same myFun.mex function; : Lib myFun This way I get some new files: libmyfun.c libmyfun.dll Libmyfun.exp libmyfun.exports libmyfun .h libmyfun.lib Reading around and I think that Creating a myfun.cpp that is very famous is included: / * gateway function * / zero max function (ent NLHS, MXARRA * PLS [], int NRHS, CONST M Xeray * PHS []) Here is the Variable Deals * / / * code here * /} I have tried to do this and are called Regular of Max Generation: Max ('- v', 'myfun.cpp') But I get many errors, and I should say that my myfun.cpp copy / Paste Function is where I have a lot of doubts ... especially on input / output management. My q
Read more