Android调用摄像头扫码接口集成

1，导入zxingdecode.jar和core-3.0.0.jar(google二维码扫描和生成所需jar)，同步库

2，添加权限

    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.FLASHLIGHT" />
    <uses-feature android:name="android.hardware.camera" />
    <uses-feature android:name="android.hardware.camera.autofocus" />
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />

3，复制扫描界面布局文件和图片资源

布局文件activity_capture.xml

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@android:color/transparent"
        android:orientation="vertical" >

        <SurfaceView
            android:id="@+id/capture_preview"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

        <RelativeLayout
            android:id="@+id/capture_container"
            android:layout_width="match_parent"
            android:layout_height="match_parent" >

            <ImageView
                android:id="@+id/capture_mask_top"
                android:layout_width="match_parent"
                android:layout_height="120dp"
                android:layout_alignParentTop="true"
                android:background="@drawable/shadow" />

            <RelativeLayout
                android:id="@+id/capture_crop_view"
                android:layout_width="200dp"
                android:layout_height="200dp"
                android:layout_below="@id/capture_mask_top"
                android:layout_centerHorizontal="true"
                android:background="@drawable/qr_code_bg">

                <ImageView
                    android:id="@+id/capture_scan_line"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_alignParentTop="true"
                    android:layout_marginTop="5dp"
                    android:layout_marginBottom="5dp"
                    android:src="@drawable/scan_line" />
            </RelativeLayout>

            <ImageView
                android:id="@+id/capture_mask_bottom"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:layout_below="@id/capture_crop_view"
                android:background="@drawable/shadow" />

            <ImageView
                android:id="@+id/capture_mask_left"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:layout_above="@id/capture_mask_bottom"
                android:layout_alignParentLeft="true"
                android:layout_below="@id/capture_mask_top"
                android:layout_toLeftOf="@id/capture_crop_view"
                android:background="@drawable/shadow" />

            <ImageView
                android:id="@+id/capture_mask_right"
                android:layout_width="wrap_content"
                android:layout_height="match_parent"
                android:layout_above="@id/capture_mask_bottom"
                android:layout_alignParentRight="true"
                android:layout_below="@id/capture_mask_top"
                android:layout_toRightOf="@id/capture_crop_view"
                android:background="@drawable/shadow" />
        </RelativeLayout>

    </RelativeLayout>

4，扫描二维码页面:QRActivity.java，复制过去也可以

package com.fff.qrdemo9;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.SurfaceView;
import android.view.Window;
import android.view.WindowManager;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.rbj.zxing.decode.QrcodeDecode;

public class QRActivity extends Activity {
    private SurfaceView scanPreview;//相机
    private RelativeLayout scanCropView;//扫描框
    private ImageView scanLine;//扫描框中间的线
    private QrcodeDecode qd;
    private TextView mResultText;

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);

        Window window = getWindow();
        window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        setContentView(R.layout.activity_capture);

        scanPreview = (SurfaceView) findViewById(R.id.capture_preview);
        scanCropView = (RelativeLayout) findViewById(R.id.capture_crop_view);
        scanLine = (ImageView) findViewById(R.id.capture_scan_line);

        qd = new QrcodeDecode(this, scanPreview, scanCropView) {

            @Override
            public void handleDecode(Bundle bundle) {
                //扫描成功后调用
                String QRtext=bundle.getString(QrcodeDecode.BARCODE_RESULT);
                //数据是使用Intent返回
                Intent intent = new Intent();
                //把返回数据存入Intent
                intent.putExtra("result", QRtext);
                //设置返回数据
                QRActivity.this.setResult(RESULT_OK, intent);
                //关闭Activity
                QRActivity.this.finish();
            }
        };
        TranslateAnimation animation = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT,
                0.9f);
        animation.setDuration(4500);
        animation.setRepeatCount(-1);
        animation.setRepeatMode(Animation.RESTART);
        scanLine.startAnimation(animation);
    }
    @Override
    protected void onResume() {
        super.onResume();
        //在此处开起扫描
        qd.onResume();
    }

    @Override
    protected void onPause() {
        //
        qd.onPause();
        super.onPause();
    }

    @Override
    protected void onDestroy() {
        //释放资源
        qd.onDestroy();
        super.onDestroy();
    }
}

记得注册一下QRActivity,不然会闪退

<activity android:name=".QRActivity"/>

5，测试调用

布局文件activity_main，一个按钮，一个展示扫码结果

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/btn_qrcode"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="开始扫码" />

    <TextView
        android:id="@+id/txt_result"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="扫描结果" />
</LinearLayout>

MainActivity.java通过重写onActivityResult得到扫码结果

package com.fff.qrdemo9;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;


public class MainActivity extends Activity {

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


        Button btn=(Button) findViewById(R.id.btn_qrcode);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //得到新打开Activity关闭后返回的数据
                //第二个参数为请求码，可以根据业务需求自己编号     打开扫码界面，重写方法接受返回
                startActivityForResult(new Intent(MainActivity.this, QRActivity.class), 1);
            }
        });

    }

    /**
     * 为了得到传回的数据，必须在前面的Activity中（指MainActivity类）重写onActivityResult方法
     * requestCode 请求码，即调用startActivityForResult()传递过去的值
     * resultCode 结果码，结果码用于标识返回数据来自哪个新Activity
     */

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        //扫描结果回调
        if (resultCode == RESULT_OK) {
            String result = data.getExtras().getString("result");//得到新Activity 关闭后返回的数据
            TextView tv=findViewById(R.id.txt_result);
            tv.setText(result);
        }
    }

}