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

<?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>

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;@Overridepublic 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();}@Overrideprotected void onPause() {super.onPause();captureManager.onPause();}@Overrideprotected void onResume() {super.onResume();captureManager.onResume();}@Overrideprotected void onDestroy() {super.onDestroy();captureManager.onDestroy();}@Overridepublic void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {super.onSaveInstanceState(outState, outPersistentState);captureManager.onSaveInstanceState(outState);}@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {return mDBV.onKeyDown(keyCode, event) || super.onKeyDown(keyCode, event);}@Overridepublic void onTorchOn() {}@Overridepublic 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

    // 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);        }    }