我在zxing onActivityResult()中遇到一些问题.
正如您可以在代码中看到的,我已经正确地调用了https://code.google.com/p/zxing/wiki/ScanningViaIntent所述的新意图.
问题是如何在Fragment中捕获onActivityResult(),因为我需要Fragmnet中的这些数据而不是Activity？
package com.example.testingcodereading;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
public class MainFragment extends Fragment {
private Button mButtonXZing;
@Override
public View onCreateView(LayoutInflater inflater,ViewGroup parent,Bundle savedInstanceState){
View v = inflater.inflate(R.layout.fragment_main,parent,false);
mButtonXZing = (Button) v.findViewById(R.id.button_xzing);
mButtonXZing.setonClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
IntentIntegrator integrator = new IntentIntegrator(getActivity());
integrator.initiateScan();
}
});
return v;
}
@Override
public void onActivityResult(int requestCode,int resultCode,Intent intent) {
System.out.println("never here");
IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode,resultCode,intent);
if (scanResult != null) {
// handle scan result
}
// else continue with any other code you need in the method
}
}
public class MainActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentManager fm = getSupportFragmentManager();
Fragment f = fm.findFragmentById(R.id.fragmentContainer);
if(f == null){
f = new MainFragment();
fm.beginTransaction()
.add(R.id.fragmentContainer,f)
.commit();
}
}
@Override
protected void onActivityResult(int requestCode,Intent intent) {
super.onActivityResult(requestCode,intent);
System.out.println("the code is catch");
}
}
解决方法
正如Martynnw指出的那样,问题是调用fragment.startActivityForResult而不是activity.startActivityForResult.所以只需使用下一个包装：
import android.content.Intent;
import android.support.v4.app.Fragment;
import com.google.zxing.integration.android.IntentIntegrator;
public final class FragmentIntentIntegrator extends IntentIntegrator {
private final Fragment fragment;
public FragmentIntentIntegrator(Fragment fragment) {
super(fragment.getActivity());
this.fragment = fragment;
}
@Override
protected void startActivityForResult(Intent intent,int code) {
fragment.startActivityForResult(intent,code);
}
}