ZXing二维码扫描

public class MainActivity extends AppCompatActivity {    private TextView textView;    private ImageView qrImgImageView ;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);            //打开扫描界面扫描条形码或二维码            textView = (TextView) findViewById(R.id.result_button_view);            qrImgImageView = (ImageView)findViewById(R.id.gen_id);        }        //扫描        public void scannner(View view){            Intent openCameraIntent = new Intent(this, CaptureActivity.class);            startActivityForResult(openCameraIntent, 0);        }        public void gener_pic(View view){            String contentString = "222222";            if (!contentString.equals("")) {                //根据字符串生成二维码图片并显示在界面上，第二个参数为图片的大小（350*350）                Bitmap qrCodeBitmap = EncodingUtils.createQRCode(contentString, 350, 350,                        BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher));                qrImgImageView.setImageBitmap(qrCodeBitmap);            }        }        @Override        protected void onActivityResult(int requestCode, int resultCode, Intent data) {            super.onActivityResult(requestCode, resultCode, data);            if (resultCode == RESULT_OK) {                Bundle bundle = data.getExtras();                String scanResult = bundle.getString("result");                textView.setText(scanResult);            }        }//导入依赖https://github.com/bwei1503d/xme使用libZxing,依赖会报错删除manifest.xml 里面的
android:theme="@style/Theme.AppCompat"

//布局
 
<ImageView    android:layout_width="300dp"    android:layout_height="300dp"    android:id="@+id/gen_id"/><TextView    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:id="@+id/result_button_view"/><Button    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="扫一扫"    android:onClick="scannner"    android:id="@+id/scanner_id"/><Button    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="生成二维码"    android:onClick="gener_pic"    android:id="@+id/gener_pic"/>