Android扫描和生成二维码

本文实例为大家分享了Android扫描和生成二维码的具体代码，供大家参考，具体内容如下

MainActivity.java

public class MainActivity extends AppCompatActivity {

private ImageView mImageView;

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

Button button =findViewById(R.id.btn);
 mImageView =findViewById(R.id.img);
 button.setOnClickListener(new View.OnClickListener() { //点击按钮扫描二维码
  @Override
  public void onClick(View view) {
   Intent intent = new Intent(MainActivity.this,CaptureActivity.class);

startActivityForResult(intent,2);
  }
 });

}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 super.onActivityResult(requestCode, resultCode, data);
 if (requestCode==200&& resultCode==RESULT_OK){

if (data!=null){
   String content = data.getStringExtra(Constant.CODED_CONTENT);
   if (TextUtils.isEmpty(content)){

Toast.makeText(MainActivity.this, "您的输入为空!", Toast.LENGTH_SHORT).show();
    return;

}

Bitmap logo = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher);
   try {
    Bitmap bitmap = CodeCreator.createQRCode(content, 400, 400, logo);
    mImageView.setImageBitmap(bitmap);
   } catch (WriterException e) {
    e.printStackTrace();
   }

Toast.makeText(MainActivity.this,"扫描"+content,Toast.LENGTH_SHORT).show();

}
 }
}
}

activity.main.xml

<android.support.constraint.ConstraintLayout 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"
tools:context=".MainActivity"
android:orientation="vertical">

<Button
 android:id="@+id/btn"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="扫一扫"/>

<ImageView
 android:id="@+id/img"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 />

</android.support.constraint.ConstraintLayout>

需要配置的权限

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

build.gradle

minSdkVersion 16  //配置16
implementation'com.github.yuzhiqiang1993:zxing:2.2.1' //依赖

外部build.gradle

allprojects {
repositories {
 google()
 jcenter()
 maven { url 'https://jitpack.io' } //加这行代码
}
}

来源：https://blog.csdn.net/FanRQ_/article/details/83863655