我正在做一个应用程序,其中代码将扫描条形码并检查内容,如果内容与if else语句相符,它将显示价格。我该如何解决这个问题?
以下是代码:
public class barcode extends AppCompatActivity {
Button scan_btn;
EditText Edit_current;
TextView formatTxt, contentTxt,price;
int x;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(activity_promotion_page);
formatTxt = (TextView) findViewById(R.id.scanFormat);
contentTxt = (TextView) findViewById(scanContent);
price = (TextView)findViewById(R.id.Price);
scan_btn = (Button) findViewById(R.id.scan_button);
final Activity activity = this;
scan_btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
IntentIntegrator integrator = new IntentIntegrator(activity);
integrator.setDesiredBarcodeFormats(IntentIntegrator.PRODUCT_CODE_TYPES);
integrator.setPrompt("Scan");
integrator.setCameraId(0);
integrator.setBeepEnabled(false);
integrator.setBarcodeImageEnabled(false);
integrator.initiateScan();
}
});
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
if(result.getContents( ) == null) {
Log.d("MainActivity", "Cancelled scan");
Toast.makeText(this, "Cancelled", Toast.LENGTH_LONG).show();
} else if (result.getContents().equals(12345014)){
price.setText("$999");
}else if (result.getContents().equals(12345021)){
price.setText("$91");
}
}}
答案 0 :(得分:0)
由于信息有限,我相信这是因为result.getContents()
与您正在检查的任何陈述都不匹配。我将此添加为底部的最终陈述:
} else {
Log.d("MainActivity", "Failed to match. Contents are " + result.getContents());
}
所以至少你可以看到result.getContents()
包含的内容,并且可以采取相应的行动。您当前的解决方案也不具备可扩展性 - 我会研究使用switch
语句或使用SQLite查询产品数据库。