Barcode Scanner

static final String SCAN = "com.google.zxing.client.android.SCAN";
try {
//this intent is used to call start for bar code
Intent in = new Intent( SCAN );
in.putExtra( "SCAN_MODE", "PRODUCT_MODE" );
startActivityForResult( in, 0 );
} catch ( ActivityNotFoundException e) {
showDialog( MainActivity.this,"No scanner found", "Download Scanner code Activity?"," Yes", "No" ).show();
}

private Dialog showDialog (final Activity act, CharSequence title, CharSequence message, CharSequence yes, CharSequence no ) {
// a subclass of dialog that can display buttons and message
AlertDialog.Builder download = new AlertDialog.Builder( act );
download.setTitle( title );
download.setMessage ( message );
download.setPositiveButton ( yes, new DialogInterface.OnClickListener ( ) {
@Override
public void onClick( DialogInterface dialog, int i ) {
// TODO Auto-generated method stub
//uri to download barcode scanner
Uri uri = Uri.parse( "market://search?q=pname:" + "com.google.zxing.client.android" );
Intent in = new Intent ( Intent.ACTION_VIEW, uri );
try {
act.startActivity ( in );
} catch ( ActivityNotFoundException e) {
}
}
});
download.setNegativeButton ( no, new DialogInterface.OnClickListener() {
@Override
public void onClick ( DialogInterface dialog, int i ) {
// TODO Auto-generated method stub
}
});
return download.show();
}

@Override
protected void onActivityResult ( int requestCode, int resultCode, Intent in ) {
// TODO Auto-generated method stub
if( requestCode == 0 ){
if( resultCode == RESULT_OK ){
//use to get scan result
String contents = in.getStringExtra( "SCAN_RESULT" );
String format = in.getStringExtra( "SCAN_RESULT_FORMAT" ) ;
Toast toast = Toast.makeText( this, "Content:" + contents + " Format:" + format, Toast.LENGTH_LONG );
toast.show();
}
}
}