Why does this force close before the activity screen is drawn? (android)?

The line: EditText totalbox = (EditText) findViewById(R.id. Totalbox) Is not in the OnCreate method, so its trying to initialize the totalbox before the activity is created, probably causing the crash Try this instead: package com.mhe.test. Scan; import android.app.

Activity; import android.content. Intent; import android.os. Bundle; import android.view.

View; import android.widget. Button; import android.widget. EditText; public class main extends Activity { /** Called when the activity is first created.

*/ @Override public void onCreate(Bundle savedInstanceState) { super. OnCreate(savedInstanceState); setContentView(R.layout. Main); Button myScanButton = (Button) findViewById(R.id.

MyScanButton); // set the totalbox in the onCreate totalbox = (EditText) findViewById(R.id. Totalbox); myScanButton. SetOnClickListener(new Button.OnClickListener() { public void onClick(View v) { Intent intent = new Intent("com.google.zxing.client.android.

SCAN"); intent. PutExtra("SCAN_MODE", "PRODUCT_MODE"); startActivityForResult(intent, 0); } }); } public void onActivityResult(int requestCode, int resultCode, Intent intent) { if (requestCode == 0) { if (resultCode == RESULT_OK) { String contents = intent. GetStringExtra("SCAN_RESULT"); // Handle successful scan // check that it exists, just in case if ( totalbox!

= null ) totalbox. SetText(contents); } else if (resultCode == RESULT_CANCELED) { // Handle cancel // check that it exists, just in case if ( totalbox! = null ) totalbox.

SetText("@string/bummer"); } } } private EditText totalbox; }.

The line: EditText totalbox = (EditText) findViewById(R.id. Totalbox); Is not in the OnCreate method, so its trying to initialize the totalbox before the activity is created, probably causing the crash Try this instead: package com.mhe.test. Scan; import android.app.

Activity; import android.content. Intent; import android.os. Bundle; import android.view.

View; import android.widget. Button; import android.widget. EditText; public class main extends Activity { /** Called when the activity is first created.

*/ @Override public void onCreate(Bundle savedInstanceState) { super. OnCreate(savedInstanceState); setContentView(R.layout. Main); Button myScanButton = (Button) findViewById(R.id.

MyScanButton); // set the totalbox in the onCreate totalbox = (EditText) findViewById(R.id. Totalbox); myScanButton. SetOnClickListener(new Button.OnClickListener() { public void onClick(View v) { Intent intent = new Intent("com.google.zxing.client.android.

SCAN"); intent. PutExtra("SCAN_MODE", "PRODUCT_MODE"); startActivityForResult(intent, 0); } }); } public void onActivityResult(int requestCode, int resultCode, Intent intent) { if (requestCode == 0) { if (resultCode == RESULT_OK) { String contents = intent. GetStringExtra("SCAN_RESULT"); // Handle successful scan // check that it exists, just in case if ( totalbox!

= null ) totalbox. SetText(contents); } else if (resultCode == RESULT_CANCELED) { // Handle cancel // check that it exists, just in case if ( totalbox! = null ) totalbox.

SetText("@string/bummer"); } } } private EditText totalbox; }.

A question. Bare with me Im fairly new at all this android coding so I might be leading you down a rabbit hole. Are you testing on a phone with zxing on it?

I don't know if it will cause the program to force close if it is not there already before button push.

Rasmus, yes phone has zXing. Valid question I think :) – sgardeski Jun 30 '10 at 15:23.

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