实施zxing时出错

Question

我正在使用教程将zxing代码实现到我自己的应用程序中。我遵循可用的代码，但是我收到一个错误，任何人都可以建议如何修复错误吗？

package meena.com.android; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.Button; 

public class MeenaActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     Button but_previous=(Button)findViewById(R.id.button1); 
     but_previous.setOnClickListener(new OnClickListener() { 
       public void onClick(View arg0) { 
        Intent intent = new Intent("com.google.zxing.client.android.SCAN"); 
        intent.putExtra("SCAN_MODE", "QR_CODE_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"); 
          String format = intent.getStringExtra("SCAN_RESULT_FORMAT"); 
          // Handle successful scan 
          } else if (resultCode == RESULT_CANCELED) { 
          // Handle cancel 
          } 
         } 
        } 



    } 
     }); 
    } 

} 

的代码，并显示错误的行是： 公共无效onActivityResult（INT requestCode，INT发送resultCode，意图意图）; {

我被告知有语法错误和错位的构造函数，但是这是给出的代码，我不确定如何修复它。我用过的教程是“http://damianflannery.wordpress.com/2011/06/13/integrate-zxing-barcode-scanner-into-your-android-app-natively-using-eclipse/”

Answer 1

onActivityResult（）是Activity类的一个方法。为了覆盖它，你需要将这块代码移到创建块上。像这样：

package meena.com.android; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.Button; 

public class MeenaActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     Button but_previous=(Button)findViewById(R.id.button1); 
     but_previous.setOnClickListener(new OnClickListener() { 
       public void onClick(View arg0) { 
        Intent intent = new Intent("com.google.zxing.client.android.SCAN"); 
        intent.putExtra("SCAN_MODE", "QR_CODE_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"); 
       String format = intent.getStringExtra("SCAN_RESULT_FORMAT"); 
       // Handle successful scan 
      } else if (resultCode == RESULT_CANCELED) { 
       // Handle cancel 
      } 
     } 
    } 

}