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-2

I had made 5 textviews, textview1 to textview5.
Then I created a textview array like this:-

TextView tvArr[] = new TextView[] textview1, textview2, textview3, textview4, textview5 ;

When I am using the setText method, it is throwing NullPointerException -

tvArr[3].setText("Done");

Please help me find out what I've missed out, and thanks in advance...

Edit: I want to find out how the set text method is throwing NullPointerException, I am not asking to troubleshoot my code...

android arrays nullpointerexception textview

share|improve this question

edited Mar 28 at 13:07

Siong Thye Goh

2,5001010 gold badges1414 silver badges2323 bronze badges

asked Mar 28 at 12:20

Pd UniquePd Unique

333 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Possible duplicate of What is a NullPointerException, and how do I fix it?
  
  – Zoe
  Mar 28 at 12:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I am not understanding what here is throwing NullPointerException ?
  
  – Pd Unique
  Mar 28 at 12:23
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  what is null point error ? @PdUnique
  
  – Ashish
  Mar 28 at 12:25
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You have to put a object in the array slots. You are trying to set something that does not exist.
  
  – Mr00Anderson
  Mar 28 at 12:27
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Are you initialising all the textview before adding them to the array?
  
  – iCantC
  Mar 28 at 12:28
  

  
  
  
  

 | 
show 5 more comments

-2

I had made 5 textviews, textview1 to textview5.
Then I created a textview array like this:-

TextView tvArr[] = new TextView[] textview1, textview2, textview3, textview4, textview5 ;

When I am using the setText method, it is throwing NullPointerException -

tvArr[3].setText("Done");

Please help me find out what I've missed out, and thanks in advance...

Edit: I want to find out how the set text method is throwing NullPointerException, I am not asking to troubleshoot my code...

android arrays nullpointerexception textview

share|improve this question

edited Mar 28 at 13:07

Siong Thye Goh

2,5001010 gold badges1414 silver badges2323 bronze badges

asked Mar 28 at 12:20

Pd UniquePd Unique

333 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Possible duplicate of What is a NullPointerException, and how do I fix it?
  
  – Zoe
  Mar 28 at 12:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I am not understanding what here is throwing NullPointerException ?
  
  – Pd Unique
  Mar 28 at 12:23
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  what is null point error ? @PdUnique
  
  – Ashish
  Mar 28 at 12:25
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You have to put a object in the array slots. You are trying to set something that does not exist.
  
  – Mr00Anderson
  Mar 28 at 12:27
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Are you initialising all the textview before adding them to the array?
  
  – iCantC
  Mar 28 at 12:28
  

  
  
  
  

 | 
show 5 more comments

I had made 5 textviews, textview1 to textview5.
Then I created a textview array like this:-

TextView tvArr[] = new TextView[] textview1, textview2, textview3, textview4, textview5 ;

When I am using the setText method, it is throwing NullPointerException -

tvArr[3].setText("Done");

Please help me find out what I've missed out, and thanks in advance...

Edit: I want to find out how the set text method is throwing NullPointerException, I am not asking to troubleshoot my code...

android arrays nullpointerexception textview

share|improve this question

edited Mar 28 at 13:07

Siong Thye Goh

2,5001010 gold badges1414 silver badges2323 bronze badges

asked Mar 28 at 12:20

Pd UniquePd Unique

333 bronze badges

TextView tvArr[] = new TextView[] textview1, textview2, textview3, textview4, textview5 ;

tvArr[3].setText("Done");

android arrays nullpointerexception textview

android arrays nullpointerexception textview

share|improve this question

edited Mar 28 at 13:07

Siong Thye Goh

2,5001010 gold badges1414 silver badges2323 bronze badges

asked Mar 28 at 12:20

Pd UniquePd Unique

333 bronze badges

share|improve this question

edited Mar 28 at 13:07

Siong Thye Goh

2,5001010 gold badges1414 silver badges2323 bronze badges

asked Mar 28 at 12:20

Pd UniquePd Unique

333 bronze badges

edited Mar 28 at 13:07

Siong Thye Goh

2,5001010 gold badges1414 silver badges2323 bronze badges

edited Mar 28 at 13:07

Siong Thye Goh

2,5001010 gold badges1414 silver badges2323 bronze badges

asked Mar 28 at 12:20

Pd UniquePd Unique

333 bronze badges

asked Mar 28 at 12:20

Pd UniquePd Unique

333 bronze badges

1 Answer
1

active

oldest

votes

0

After declaring the text views array, you have to initialize the items in it. Use either

tvArr[3] = new TextView(this);
tvArr[3].setText("Done");
parentLayout.addView(tvArr[3]);

or

tvArr[3] = (TextView)findViewById(R.id.txt_view);
tvArr[3].setText("Done");

share|improve this answer

answered Mar 28 at 12:34

MariaMaria

7955 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  As you have told in option 2, to initialize tvArr[3]...
  
  – Pd Unique
  Mar 28 at 12:37
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  But I have first initialized the TextViews then added it to array...
  
  – Pd Unique
  Mar 28 at 12:37
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Adding objects to an array should be like TextView[] tvArr = new TextView[5]; tvArr[0] = textView1; tvArr[1] = textView2; etc. Then you can use it as tvArr[0].setText("Done");
  
  – Maria
  Mar 28 at 12:47
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Okay I will try...
  
  – Pd Unique
  Mar 28 at 13:20
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Those are not the only possible ways. For example the Oracle Java documentation page linked in the question comments gives an example of a similar way (albeit with primitives) as the OP used: int[] anArray = 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000;. It should be perfectly valid. Of course assuming that the objects added to the array are non-null.
  
  – Markus Kauppinen
  Mar 28 at 13:27
  

  
  
  
  

add a comment
 | 

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0

After declaring the text views array, you have to initialize the items in it. Use either

tvArr[3] = new TextView(this);
tvArr[3].setText("Done");
parentLayout.addView(tvArr[3]);

or

tvArr[3] = (TextView)findViewById(R.id.txt_view);
tvArr[3].setText("Done");

share|improve this answer

answered Mar 28 at 12:34

MariaMaria

7955 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  As you have told in option 2, to initialize tvArr[3]...
  
  – Pd Unique
  Mar 28 at 12:37
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  But I have first initialized the TextViews then added it to array...
  
  – Pd Unique
  Mar 28 at 12:37
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Adding objects to an array should be like TextView[] tvArr = new TextView[5]; tvArr[0] = textView1; tvArr[1] = textView2; etc. Then you can use it as tvArr[0].setText("Done");
  
  – Maria
  Mar 28 at 12:47
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Okay I will try...
  
  – Pd Unique
  Mar 28 at 13:20
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Those are not the only possible ways. For example the Oracle Java documentation page linked in the question comments gives an example of a similar way (albeit with primitives) as the OP used: int[] anArray = 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000;. It should be perfectly valid. Of course assuming that the objects added to the array are non-null.
  
  – Markus Kauppinen
  Mar 28 at 13:27
  

  
  
  
  

add a comment
 | 

0

After declaring the text views array, you have to initialize the items in it. Use either

tvArr[3] = new TextView(this);
tvArr[3].setText("Done");
parentLayout.addView(tvArr[3]);

or

tvArr[3] = (TextView)findViewById(R.id.txt_view);
tvArr[3].setText("Done");

share|improve this answer

answered Mar 28 at 12:34

MariaMaria

7955 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  As you have told in option 2, to initialize tvArr[3]...
  
  – Pd Unique
  Mar 28 at 12:37
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  But I have first initialized the TextViews then added it to array...
  
  – Pd Unique
  Mar 28 at 12:37
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Adding objects to an array should be like TextView[] tvArr = new TextView[5]; tvArr[0] = textView1; tvArr[1] = textView2; etc. Then you can use it as tvArr[0].setText("Done");
  
  – Maria
  Mar 28 at 12:47
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Okay I will try...
  
  – Pd Unique
  Mar 28 at 13:20
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Those are not the only possible ways. For example the Oracle Java documentation page linked in the question comments gives an example of a similar way (albeit with primitives) as the OP used: int[] anArray = 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000;. It should be perfectly valid. Of course assuming that the objects added to the array are non-null.
  
  – Markus Kauppinen
  Mar 28 at 13:27
  

  
  
  
  

add a comment
 | 

After declaring the text views array, you have to initialize the items in it. Use either

tvArr[3] = new TextView(this);
tvArr[3].setText("Done");
parentLayout.addView(tvArr[3]);

or

tvArr[3] = (TextView)findViewById(R.id.txt_view);
tvArr[3].setText("Done");

share|improve this answer

answered Mar 28 at 12:34

MariaMaria

7955 bronze badges

tvArr[3] = new TextView(this);
tvArr[3].setText("Done");
parentLayout.addView(tvArr[3]);

tvArr[3] = (TextView)findViewById(R.id.txt_view);
tvArr[3].setText("Done");

share|improve this answer

answered Mar 28 at 12:34

MariaMaria

7955 bronze badges

answered Mar 28 at 12:34

MariaMaria

7955 bronze badges

answered Mar 28 at 12:34

MariaMaria

7955 bronze badges