Question

我正在尝试在我的Android应用程序中实现条形码扫描程序活动，但我听说如果不要求用户安装ZXing条形码扫描程序就不可能这样做。

所以我所做的是我使用ZXing集成器类来启动扫描，这是我的代码。但是我无法在两个文本视图中显示结果。我必须提到扫描已经开始，结果会显示在条形码扫描器窗口本身，但是ScanCodeActivity布局上没有任何内容，它有两个文本视图。

我也想知道是否可以将结果从eweb返回到我的文本视图中。

我使用此链接作为参考： http://code.tutsplus.com/tutorials/android-sdk-create-a-barcode-reader--mobile-17162

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.google.zxing.integration.android.IntentIntegrator;
import com.google.zxing.integration.android.IntentResult;

public class ScanCodeActivity extends Activity {

    private Button scan;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.scancodelayout);

        scan= (Button)findViewById(R.id.scan_button);

        Button scanBtn  = (Button)findViewById(R.id.scan_button);
        final TextView  formatTxt = (TextView)findViewById(R.id.scan_format);
        final TextView contentTxt = (TextView)findViewById(R.id.scan_content);

        scanBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                IntentIntegrator scanIntegrator = new IntentIntegrator(ScanCodeActivity.this);
                scanIntegrator.initiateScan();
            }
        });
    }

    public void onActivityResult(int requestCode, int resultCode, Intent intent) {
           if (requestCode == 0) {
               IntentResult scanningResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
               if (resultCode == RESULT_OK) {
                   if (scanningResult != null) {
                       final TextView  formatTxt = (TextView)findViewById(R.id.scan_format);
                       final TextView contentTxt = (TextView)findViewById(R.id.scan_content);
                       String scanContent = scanningResult.getContents();
                       String scanFormat = scanningResult.getFormatName();
                       Toast toast = Toast.makeText(this, "Content:" + scanContent + " Format:" + scanFormat , Toast.LENGTH_LONG);

                       formatTxt.setText("FORMAT: " + scanFormat);
                       contentTxt.setText("CONTENT: " + scanContent);
                     //we have a result
                     }
                   else{
                        Toast toast = Toast.makeText(getApplicationContext(), 
                            "No scan data received!", Toast.LENGTH_SHORT);
                        toast.show();
                    }
               } else if (resultCode == RESULT_CANCELED) {
                  // Handle cancel
                  Log.i("App","Scan unsuccessful");
               }
         }
      }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

Answer 1

从您的if (requestCode == 0)方法中移除onActivityResult()支票，类似于图书馆wiki page中的示例。

注意：您正在检查错误的requestCode。该库使用0x0000c0de（请参阅the source）而不是0。

无法从ZXing条形码扫描仪获得结果

1 个答案: