zxing-android-embedded的使用及自定义样式仿微信的

前言

最近项目要添加扫描二维码，之前也做过效果不是很好（预览变形，识别率太差）

所以这次考虑要解决这些bug，经过一番百度找到一个比较好用的第三方库zxing-android-embedded（因为自己水平太菜，自己写还是算了）

项目地址：https://github.com/journeyapps/zxing-android-embedded

效果图如下：

备注：

由于项目原始的UI，跟我想要的还不一样，所以这里看到的已经是被修改过的，仿微信的

经过测试效果很好，所以决定使用一下

使用步骤如下：

1.配置项目依赖

在module的builde.gradle 添加依赖包

compile 'com.google.zxing:core:3.2.1'

compile(name: 'zxing-android-embedded-release', ext: 'aar')

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.0.0'
    compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha6'
    compile 'com.android.support:support-v4:25.0.1'
    testCompile 'junit:junit:4.12'
    compile 'com.google.zxing:core:3.2.1'
    compile(name: 'zxing-android-embedded-release', ext: 'aar')
    compile 'cn.jiguang:jpush:2.2.0'
}

2.添加预览的activity

布局如下：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:andro
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <com.journeyapps.barcodescanner.DecoratedBarcodeView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:
            app:zxing_preview_scaling_strategy="fitXY"
            app:zxing_use_texture_view="true"
            app:zxing_frame_color="@android:color/white">
        </com.journeyapps.barcodescanner.DecoratedBarcodeView>

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="#202020"
            android:
            android:layout_weight="0">

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                android:gravity="center"
                android:layout_centerVertical="true"
                android:>

                <ImageView
                    android:
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentLeft="true"
                    android:paddingLeft="12dp"
                    android:paddingTop="14dp"
                    android:paddingBottom="14dp"
                    android:paddingRight="4dp"
                    android:src="@drawable/ico_back" />
                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textColor="@android:color/white"
                    android:text="返回"/>

            </LinearLayout>

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:
                android:text="扫描二维码"
                android:textColor="@android:color/white"
                android:textSize="18sp"
                android:textStyle="bold"/>

        </RelativeLayout>
    </RelativeLayout>

</FrameLayout>

代码如下：

import android.app.Activity;
import android.os.Bundle;
import android.os.PersistableBundle;
import android.view.KeyEvent;

import com.journeyapps.barcodescanner.CaptureManager;
import com.journeyapps.barcodescanner.DecoratedBarcodeView;




public class MipcaActivityCapture extends Activity implements DecoratedBarcodeView.TorchListener {


	private CaptureManager captureManager;
	private DecoratedBarcodeView mDBV;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_capture);

		mDBV = (DecoratedBarcodeView) findViewById(R.id.dbv_custom);
		mDBV.setTorchListener(this);

		//重要代码，初始化捕获
		captureManager = new CaptureManager(this, mDBV);
		captureManager.initializeFromIntent(getIntent(),savedInstanceState);
		captureManager.decode();
	}

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

	@Override
	protected void onResume() {
		super.onResume();
		captureManager.onResume();
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();
		captureManager.onDestroy();
	}

	@Override
	public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {
		super.onSaveInstanceState(outState, outPersistentState);
		captureManager.onSaveInstanceState(outState);
	}

	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		return mDBV.onKeyDown(keyCode, event) || super.onKeyDown(keyCode, event);
	}

	@Override
	public void onTorchOn() {
		
	}

	@Override
	public void onTorchOff() {

	}
}

3.配置启动和回调

启动代码：

        new IntentIntegrator(context)
                .setOrientationLocked(false)
                .setCaptureActivity(MipcaActivityCapture.class) // 设置自定义的activity是CustomActivity
                .initiateScan(); // 初始化扫描

这里设置很多参数，具体可以看github上面的文档

回调代码：

    // 通过 onActivityResult的方法获取 扫描回来的 值
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        IntentResult intentResult = IntentIntegrator.parseActivityResult(requestCode,resultCode,data);
        if(intentResult != null) {
            if(intentResult.getContents() == null) {
                Toast.makeText(this,"内容为空",Toast.LENGTH_LONG).show();
            } else {
                // ScanResult 为 获取到的字符串
                String ScanResult = intentResult.getContents();
                Toast.makeText(this, ScanResult,Toast.LENGTH_LONG).show();

            }
        } else {
            super.onActivityResult(requestCode,resultCode,data);
        }
    }