ZXing not calling onActivityResult,当扫描QR码
问题描述:
我使用ZXing Android嵌入式库读取QRCode并且onActivityResult
未在QRCode成功扫描后调用,请帮助。ZXing not calling onActivityResult,当扫描QR码
public class ScanActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_send_money);
Button scanButton = (Button) findViewById(R.id.scan_button);
scanButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
IntentIntegrator integrator = new IntentIntegrator(ScanActivity.this);
integrator.initiateScan();
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
System.out.println("*************** Why is this method not called?");
IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
if (result != null) {
if (result.getContents() == null) {
Toast.makeText(this, "Result Not Found", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(this, "Result is: ", Toast.LENGTH_LONG).show();
}
} else {
super.onActivityResult(requestCode, resultCode, data);
}
}
}
答
这段代码的问题是,我已经在清单文件
<activity
android:name=".ScanActivity" android:noHistory="true" />
删除android:noHistory="true"
解决使用android:noHistory="true"
上ScanActivity
问题
<activity
android:name=".ScanActivity" />
答
IntentIntegrator integrator = new IntentIntegrator(ScanActivity.this);
integrator.initiateScan();
integrator.initiateScan();不会调用或不反映startActivityForResult操作。
你必须调用startActivityForResult,以便让你可以有回调的onActivityResult
上面的代码将正常工作。 onActivityResult方法将在成功扫描条形码后调用。我已经测试过这种行为 –