zxing扫描结果为什么不显示

tankgoing 2017-11-08 05:08:14

新手。纯新手。上手1个礼拜。。。请大神看看
mainactivity

package com.gmhcash.android;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import com.google.zxing.client.android.CaptureActivity;

public class MainActivity extends AppCompatActivity {

EditText edt;

@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}

public void onScanner( View v)
{
Intent it=new Intent(this,CaptureActivity.class);
startActivityForResult(it,0);
}

public void onActivityResult(int requestCode,int resultCode,Intent data)
{
super.onActivityResult(requestCode,resultCode,data);
if(requestCode==RESULT_OK)
{
Bundle bundle = data.getExtras();
String result = bundle.getString(CaptureActivity.SCANRESULT);
edt.setText(result);
}
}

}

然后是layout

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.gmhcash.android.MainActivity">

<EditText
android:id="@+id/edt"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:ems="10"
android:hint="请扫码或输入订单号"
android:inputType="textPersonName"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />

<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="45dp"
android:layout_marginBottom="8dp"
android:layout_marginStart="8dp"
android:onClick="onScanner"
android:text="扫码"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />

<Button
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:gravity="center"
android:onClick="gotoOrderInfoActivity"
android:text="下一步"
android:visibility="visible"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />

</android.support.constraint.ConstraintLayout>

扫是可以扫扫了没扫码反应 EditText不显示什么试了1天没试出来为什么

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