android扫描二维码:已经封装为jar包,实现扫描只需一步

最新推荐文章于 2025-06-29 13:21:29 发布

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最新推荐文章于 2025-06-29 13:21:29 发布

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文章标签： zxing 二维码扫描条形码扫描

本文链接：https://blog.youkuaiyun.com/rongbaojian/article/details/50530480

本文介绍了一个基于Google ZXing项目进行封装的QR码扫描库，简化了使用过程，仅需重写一个方法即可实现扫描功能。

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介绍一下我自己封装的一个利用google的ZXing扫描二维码的一个jar

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1.来源:

在google的ZXingRawProject项目基础上去除和扫描无关的一些类,修改和封装了部分类,使用起来更方便

到底有多方便呢,方便到只需要你重写一个方法,仅仅只需要你写一个,是的你没有看错,真的只需要一个,够方便了吧

2.使用:

(1)导入zxingdecode.jar(自己封装的jar)和core-3.0.0.jar(google二维码扫描和生成所需jar)

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(2)添加权限

(3)new QrcodeDecode类并重写handleDecode(Bundle bundle)方法

(4)大功告成

注意事项和说明

实例化QrcodeDecode类需要三个参数 Activity activity,SurfaceView scanPreview ,View scanCropView

activity不说了

scanPreview 相机预览时显示

scanCropView 扫描框的容器

QrcodeDecode是抽象类,必须重写handleDecode(Bundle bundle)方法,当扫描二维码成功后会调用该方法:

参数bundle封装了扫描结果:

bundle.getInt(QrcodeDecode.BARCODE_WIDTH)图片宽度;
bundle.getInt(QrcodeDecode.BARCODE_HEIGHT)图片高度 ;
bundle.getString(QrcodeDecode.BARCODE_RESULT) 扫描结果;
bundle.getByteArray(QrcodeDecode.BARCODE_BITMAP 截取的图像.

注意:

为节省资源可以根据Activity 的生命周期来调用QrcodeDecode的方法用于释放资源

介绍完毕,下面开始上demo代码

1: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" />

2:扫描的界面:activity_capture.xml

<pre name="code" class="html"><?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_marginBottom="5dp"
                android:layout_marginTop="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>

3:扫描成功之后,用于展示扫描结果的界面activity_result.xml

<pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white"
    android:gravity="center_horizontal"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/result_image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@android:color/darker_gray"
        android:scaleType="fitXY" />

    <TextView
        android:id="@+id/result_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="20dp"
        android:background="#D8D8D8"
        android:gravity="left|top"
        android:padding="10dp"
        android:textColor="@android:color/black"
        android:textSize="14sp" />

</LinearLayout>

4:首页,扫描二维码页面:MainActivity.java

</pre><pre name="code" class="java">package com.example.decode;


import com.rbj.zxing.decode.QrcodeDecode;

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;

public class MainActivity 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;

	@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
				startActivity(new Intent(MainActivity.this, ResultActivity.class).putExtras(bundle));
				
			}
		};
		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();
	}
}

5:结果展示界面:ResultActivity.java

package com.example.decode;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.TypedValue;
import android.widget.ImageView;
import android.widget.LinearLayout.LayoutParams;
import android.widget.TextView;

import com.rbj.zxing.decode.QrcodeDecode;

public class ResultActivity extends Activity {

	private ImageView mResultImage;
	private TextView mResultText;

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

		Bundle extras = getIntent().getExtras();

		mResultImage = (ImageView) findViewById(R.id.result_image);
		mResultText = (TextView) findViewById(R.id.result_text);

		if (null != extras) {
			int width = extras.getInt("width");
			int height = extras.getInt("height");

			LayoutParams lps = new LayoutParams(width, height);
			lps.topMargin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 30, getResources().getDisplayMetrics());
			lps.leftMargin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 20, getResources().getDisplayMetrics());
			lps.rightMargin = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 20, getResources().getDisplayMetrics());
			
			mResultImage.setLayoutParams(lps);

			String result = extras.getString(QrcodeDecode.BARCODE_RESULT);
			mResultText.setText(result);

			Bitmap barcode = null;
			byte[] compressedBitmap = extras.getByteArray(QrcodeDecode.BARCODE_BITMAP);
			if (compressedBitmap != null) {
				barcode = BitmapFactory.decodeByteArray(compressedBitmap, 0, compressedBitmap.length, null);
				// Mutable copy:
				barcode = barcode.copy(Bitmap.Config.RGB_565, true);
			}

			mResultImage.setImageBitmap(barcode);
		}
	}
}