Android條碼掃描器 - onActivityResult

Question

我m using the ZXing barcode scanner and I have some issues. I m以下this交集，我不明白我應該在哪裏調用「onActivityResult」方法，以及我需要發送哪個參數。

我嘗試將該調用放在OnClickListener下，但我總是從我的intentResult null中獲取。

這是我的代碼：

public class MainActivity extends ActionBarActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     if (savedInstanceState == null) { 
      getSupportFragmentManager().beginTransaction() 
        .add(R.id.container, new PlaceholderFragment()) 
        .commit(); 
     } 
    } 


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

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

    /** 
    * A placeholder fragment containing a simple view. 
    */ 
    public static class PlaceholderFragment extends Fragment implements View.OnClickListener { 

     Button scan; 
     TextView t1, t2; 
     public PlaceholderFragment() { 
     } 

     @Override 
     public View onCreateView(LayoutInflater inflater, ViewGroup container, 
           Bundle savedInstanceState) { 
      View rootView = inflater.inflate(R.layout.fragment_main, container, false); 

      scan = (Button)rootView.findViewById(R.id.bScan); 
      t1 = (TextView) rootView.findViewById(R.id.tv1); 
      t2 = (TextView) rootView.findViewById(R.id.tv2); 

      t1.setText("OK"); 
      scan.setOnClickListener(this); 
      return rootView; 
     } 

     @Override 
     public void onActivityResult(int requestCode, int resultCode, Intent data) { 
      super.onActivityResult(requestCode, resultCode, data); 
      IntentResult intentResult = IntentIntegrator.parseActivityResult(requestCode,resultCode,data); 
      if (intentResult != null){ 

       String scanContact = intentResult.getContents(); 
       String scanFormat = intentResult.getFormatName(); 


       String contact = "Contact is: " + scanContact +"\n"; 
       String foramt = "Format is: " + scanFormat; 

       --- I never get to this part --- 

       t1.setText(contact); 
       t2.setText(foramt); 
      } else { 
       Toast toast = Toast.makeText(getActivity(), 
         "No scan data received!", Toast.LENGTH_SHORT); 
       toast.show(); 
       t1.setText("Not OK"); 
      } 
     } 

     @Override 
     public void onClick(View v) { 
      if (v.getId() == R.id.bScan) { 
       IntentIntegrator intentIntegrator = new IntentIntegrator(getActivity()); 
       intentIntegrator.initiateScan(); 

      // Intent intent = getActivity().getIntent(); 
       //startActivityForResult(intent,getTargetRequestCode()); 
       //onActivityResult(getTargetRequestCode(),CONTEXT_INCLUDE_CODE,intent); 

      } 
     } 
    } 
} 

任何幫助嗎？ 謝謝

Answer 1

你的主動活動託管你的片段，得到結果。您應該在MainActivity中調用onActivityResult，並調用super，以便您的Fragment將有機會處理數據。

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 
}