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POthread causing application to crash
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copied!<p>EDIT:</p> <p>just incase you read this i got the problem sorted i had gotten confused by my layouts and was editing the wrong one when i realised this all was sorted!</p> <p>END EDIT!</p> <p>every time i add a thread to my application it causes it to crash when the activity containing the thread is called below is the code piece containing the thread: </p> <pre><code>public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.cam); Toast t = Toast.makeText(this, "Just Click The Magnifying Glass To Search", 5000); //creates a new pop up message that lasts for 5 seconds t.setGravity(Gravity.CENTER|Gravity.CENTER, 0, 0); t.show(); bt = (ImageButton)findViewById(R.id.button); //creates instance of button bt.setOnClickListener(search); //starts an on click listener for button preview = (SurfaceView)findViewById(R.id.myview); //creates instance of surfaceview previewHolder = preview.getHolder(); //creates a surfaceholder previewHolder.addCallback(this); //sets surfaceholder callback as the activity previewHolder.setType(3); //sets the type to SURFACE_TYPE_PUSH_BUFFERS th = new Thread() { public void run() { handler.post(new Runnable() { public void run() { tv.setVisibility(0); } }); } }; th.start(); } </code></pre> <p>if anyone could shed some light on the situation it would be greatly appreciated</p> <p>EDIT:</p> <p>i have got the thread working and got it to call a method which creates Toast however when i try to modify a setting of the textview it throws an NullPointerException error</p>

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