Android 二维码扫描和生成二维码功能

compile 'com.google.zxing:core:3.3.0'

//com.google替换成自己项目的包名即可
com.google.zxing.activity.CaptureActivity
com.google.zxing.decoding.CaptureActivityHandler
com.google.zxing.decoding.DecodeHandler
com.google.zxing.view.ViewfinderView

<uses-permission android:name="android.permission.INTERNET" /> <!-- 网络权限 -->
 <uses-permission android:name="android.permission.VIBRATE" /> <!-- 震动权限 -->
 <uses-permission android:name="android.permission.CAMERA" /> <!-- 摄像头权限 -->
 <uses-feature android:name="android.hardware.camera.autofocus" /> <!-- 自动聚焦权限 -->

public class MainActivity extends AppCompatActivity {
 @BindView(R.id.openQrCodeScan)
 Button openQrCodeScan;
 @BindView(R.id.text)
 EditText text;
 @BindView(R.id.CreateQrCode)
 Button CreateQrCode;
 @BindView(R.id.QrCode)
 ImageView QrCode;
 @BindView(R.id.qrCodeText)
 TextView qrCodeText;
 //打开扫描界面请求码
 private int REQUEST_CODE = 0x01;
 //扫描成功返回码
 private int RESULT_OK = 0xA1;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 ButterKnife.bind(this);
 }
 @OnClick({R.id.openQrCodeScan, R.id.CreateQrCode})
 public void onClick(View view) {
 switch (view.getId()) {
  case R.id.openQrCodeScan:
  //打开二维码扫描界面
  if(CommonUtil.isCameraCanUse()){
   Intent intent = new Intent(MainActivity.this, CaptureActivity.class);
   startActivityForResult(intent, REQUEST_CODE);
  }else{
   Toast.makeText(this,"请打开此应用的摄像头权限！",Toast.LENGTH_SHORT).show();
  }
  break;
  case R.id.CreateQrCode:
  try {
   //获取输入的文本信息
   String str = text.getText().toString().trim();
   if(str != null && !"".equals(str.trim())){
   //根据输入的文本生成对应的二维码并且显示出来
   Bitmap mBitmap = EncodingHandler.createQRCode(text.getText().toString(), 500);
   if(mBitmap != null){
    Toast.makeText(this,"二维码生成成功！",Toast.LENGTH_SHORT).show();
    QrCode.setImageBitmap(mBitmap);
   }
   }else{
   Toast.makeText(this,"文本信息不能为空！",Toast.LENGTH_SHORT).show();
   }
  } catch (WriterException e) {
   e.printStackTrace();
  }
  break;
 }
 }
 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 super.onActivityResult(requestCode, resultCode, data);
 //扫描结果回调
 if (resultCode == RESULT_OK) { //RESULT_OK = -1
  Bundle bundle = data.getExtras();
  String scanResult = bundle.getString("qr_scan_result");
  //将扫描出的信息显示出来
  qrCodeText.setText(scanResult);
 }
 }
}

//打开二维码扫描界面
  if(CommonUtil.isCameraCanUse()){
   Intent intent = new Intent(MainActivity.this, CaptureActivity.class);
   startActivityForResult(intent, REQUEST_CODE);
  }else{
   Toast.makeText(this,"请打开此应用的摄像头权限！",Toast.LENGTH_SHORT).show();
  }

try {
   //获取输入的文本信息
   String str = text.getText().toString().trim();
   if(str != null && !"".equals(str.trim())){
   //根据输入的文本生成对应的二维码并且显示出来
   Bitmap mBitmap = EncodingHandler.createQRCode(text.getText().toString(), 500);
   if(mBitmap != null){
    Toast.makeText(this,"二维码生成成功！",Toast.LENGTH_SHORT).show();
    QrCode.setImageBitmap(mBitmap);
   }
   }else{
   Toast.makeText(this,"文本信息不能为空！",Toast.LENGTH_SHORT).show();
   }
  } catch (WriterException e) {
   e.printStackTrace();
  }

@Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 super.onActivityResult(requestCode, resultCode, data);
 //扫描结果回调
 if (resultCode == RESULT_OK) { //RESULT_OK = -1
  Bundle bundle = data.getExtras();
  String scanResult = bundle.getString("qr_scan_result");
  //将扫描出的信息显示出来
  qrCodeText.setText(scanResult);
 }
 }