Question

有人能告诉我如何将我的应用程序上下文正确传递给我的按钮setOnClickListener吗？

当我点击使用Zxing在布局代码中定义的“扫描按钮”时，我正在尝试扫描条形码。

以下是我的代码：

    public class ScaningActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
            }
        });//close upload clicklistener

    final Button scan = (Button)findViewById(R.id.scanButton);
        scan.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {

                Context c = getApplicationContext();

                // TODO Auto-generated method stub
                IntentIntegrator integrator = new IntentIntegrator(c);
                integrator.initiateScan();
            }
        });

    }//close onCreate
        public void onActivityResult(int requestCode, int resultCode, Intent intent) {
          IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
          if (scanResult != null) {
            // handle scan result
            Log.e("DATA", "TESTING SCAN RESULT : " + scanResult.toString());
          }else{
              Log.d("DATA", "NO SCAN RESULTS : ");// + scanResult.getFormatName());//scanResult.getContents());
          }

        }
}//close ScaningActivity

问题是 IntentIntegrator 无法识别我提供的 context 参数，如下所示：

Context c = getApplicationContext();
IntentIntegrator integrator = new IntentIntegrator(c);

Answer 1

尝试替换

Context c = getApplicationContext();

通过

Context c = ScaningActivity.this;

Answer 2

对于Context，您需要发送您的活动名称或<：p>

IntentIntegrator integrator = new IntentIntegrator(Your_Activity_name Or this);

Android将上下文传递给onclicklistener

2 个答案: