Android studio使用zxing扫一扫

http://blog.csdn.net/aeroyoung/article/details/51144758

zxing是github上一个二维码处理开源项目，我们使用这个库来处理二维码

如果你使用的是Android Studio,可以参考本文进行配置。并附一个小例子。

首先在build.gradle(Moudle:app)中添加下列依赖：

 repositories {
     mavenCentral()
     maven {
         url "http://dl.bintray.com/journeyapps/maven"
     }
 }

 dependencies {
     // Supports Android 4.0.3 and later (API level 15)
     compile 'com.journeyapps:zxing-android-embedded:2.0.1@aar'

     // Supports Android 2.1 and later (API level 7), but not optimal for later Android versions.
     // If you only plan on supporting Android 4.0.3 and up, you don't need to include this.
     compile 'com.journeyapps:zxing-android-legacy:2.0.1@aar'

     // Convenience library to launch the scanning and encoding Activities.
     // It automatically picks the best scanning library from the above two, depending on the
     // Android version and what is available.
     compile 'com.journeyapps:zxing-android-integration:2.0.1@aar'

     // Version 3.0.x of zxing core contains some code that is not compatible on Android 2.2 and earlier.
     // This mostly affects encoding, but you should test if you plan to support these versions.
     // Older versions e.g. 2.2 may also work if you need support for older Android versions.
     compile 'com.google.zxing:core:3.0.1'
 }

然后在AndroidManifest.xml文件标签内部，标签前面加入以下代码，申请权限

 <uses-permission android:name="android.permission.CAMERA"/>
 <uses-permission android:name="android.permission.VIBRATE"/>
 <uses-permission android:name="android.permission.INTERNET"/>

这样就行了！

接下来是用法：

在按钮的onClick事件中添加代码，点击后会跳转到扫描界面：

 @Override
     public void onClick(View v) {
         //扫描操作
         IntentIntegrator integrator = new IntentIntegrator(MainActivity.this);
         integrator.initiateScan();
     }

然后重写下列函数，用来处理解码后的信息：

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
     IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
     if (scanResult != null) {
         String result = scanResult.getContents();
         Log.d("code", result);
         Toast.makeText(this,result, Toast.LENGTH_LONG).show();
     }
 }

变量result就是二维码解码后的信息。

请用真机调试。

另外，zxing中设置的是扫描时横屏。通常我们不希望横屏，网上一般的修改方法是直接修改源代码。但是现在我们用的是gradle添加依赖的方式，所以我现在暂时没有想到办法。如果有知道的盆友望不吝赐教！