Android在片段内部使用onActivityResult
我只想在项目中使用zxing条形码扫描仪,对于我用于在项目中实现条形码阅读器的此操作,本教程在项目中使用两个zxing类,在我的应用程序中,我没有活动,我使用的是片段,不幸的是,我无法从onActivityResult获取数据以获取条形码的扫描内容:Android在片段内部使用onActivityResult,android,Android,我只想在项目中使用zxing条形码扫描仪,对于我用于在项目中实现条形码阅读器的此操作,本教程在项目中使用两个zxing类,在我的应用程序中,我没有活动,我使用的是片段,不幸的是,我无法从onActivityResult获取数据以获取条形码的扫描内容: public class FragmentAddNewWayBill extends Fragment { @Override public void onCreate(Bundle savedInstanceState) {
public class FragmentAddNewWayBill extends Fragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
G.currentActivity = FragmentAddNewWayBill.this.getActivity();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_new_waybill, container, false);
view.findViewById(R.id.imgv_scan_barcode).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
IntentIntegrator scanIntegrator = new IntentIntegrator(G.currentActivity);
scanIntegrator.initiateScan();
}
});
return view;
}
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
IntentResult scanningResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
if (scanningResult != null) {
String scanContent = scanningResult.getContents();
String scanFormat = scanningResult.getFormatName();
Log.e("barcode is: ", scanContent);
Toast.makeText(G.currentActivity,scanContent, Toast.LENGTH_SHORT).show();
}
else{
Log.e("No scan data received! ", "");
Toast toast = Toast.makeText(G.currentActivity,"No scan data received!", Toast.LENGTH_SHORT);
toast.show();
}
}
@Override
public void onPause() {
super.onPause();
}
@Override
public void onResume() {
super.onResume();
}
}
实现将取决于startactivityforresult的调用方式。 希望startactivityforresult是从库中调用的,它的调用与它从活动中调用的一样。 因此,requestCode、resultCode在ActivityResult的活动中是正确的。 因此,将onActivityResult的代码移动到activity,一切正常
如果调用了getActivity.startactivityforresult,则它是从片段调用的。然后onActivityResult应该可以正常工作。我在使用ZXing条形码阅读器时也遇到了问题 如果你需要扫描QR码,我建议你使用QR Droid API,它非常简单,你可以从一个片段中毫无问题地启动它
public class SrnSuche extends Fragment {
Context context;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_srnsuche, container, false);
Button Button_such = (Button) rootView.findViewById(R.id.button_suchen);
Button Button_scan = (Button) rootView.findViewById(R.id.button_scan);
context = rootView.getContext();
Button_scan.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent qrDroid = new Intent( "la.droid.qr.scan" );
qrDroid.putExtra( "la.droid.qr.complete" , true);
try {
startActivityForResult(qrDroid, 0);
//ja=true;
} catch (ActivityNotFoundException activity) {
// ja=false;
qrDroidRequired(getActivity());
}
}
});
}
return rootView;
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
//retrieve scan result
/*
IntentResult scanningResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
if (scanningResult != null) {
String scanContent = scanningResult.getContents();
Toast toast = Toast.makeText(context,
"SCAN THERE "+scanContent, Toast.LENGTH_SHORT);
Intent i = new Intent(context, Historie_Activity.class);
i.putExtra("value_seriennummer", scanContent);
startActivity(i);
toast.show();
}else{
Toast toast = Toast.makeText(context,
"No scan data received!", Toast.LENGTH_SHORT);
toast.show();
}*/
if (intent!= null){
String result = intent.getExtras().getString("la.droid.qr.result");
if (result != null) {
Toast toast = Toast.makeText(context,
"SCAN THERE "+result, Toast.LENGTH_SHORT);
Intent i = new Intent(context, Historie_Activity.class);
i.putExtra("value_seriennummer", result);
startActivity(i);
toast.show();
}else{
Toast toast = Toast.makeText(context,
"No scan data received!", Toast.LENGTH_SHORT);
toast.show();
}
}
}
}
链接到QR Droid API我刚刚在使用zxing库时遇到了同样的问题。
因此,您必须在片段中创建广播接收器并注册它。因此,在活动的onActivityResult中,您发送一个包含scanContent和scanformat的广播。您将在片段中创建的广播接收器中接收这些值。到底出了什么问题?谢谢,先生,不幸的是,我无法使用getActivity.startActivity;这个函数的参数是什么,先生?我不打算在片段中开始,只需将activityresult代码移到activity类,一切都正常