二维码扫描生成

导入依赖

 implementation 'cn.yipianfengye.android:zxing-library:2.2'
    //黄油刀
    implementation 'com.jakewharton:butterknife:8.8.1'

添加布局

    <Button
        android:id="@+id/btn_scan"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="开启二维码扫描"
        android:layout_gravity="center_horizontal"
        />


    <EditText
        android:id="@+id/et_info"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:hint="默认信息"
        android:layout_gravity="center_horizontal"
        />


    <Button
        android:id="@+id/btn_create_QRCode"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="生成二维码"
        android:layout_gravity="center_horizontal"
        />

    <ImageView
        android:id="@+id/iv_QRCode"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        />

创建App

public class App extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        ZXingLibrary.initDisplayOpinion(this);
    }

主页面代码

public class MainActivity extends AppCompatActivity implements View.OnClickListener {


    private static final int REQUEST_CODE = 100;
    private  Button btnScan;
    private  EditText etInfo;
    private   Button btnCreateQRCode;
    private ImageView ivQRCode;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnCreateQRCode = findViewById(R.id.btn_create_QRCode);
        btnScan = findViewById(R.id.btn_scan);
        etInfo = findViewById(R.id.et_info);
        ivQRCode = findViewById(R.id.iv_QRCode);
        btnScan.setOnClickListener(this);
        btnCreateQRCode.setOnClickListener(this);

        if (Build.VERSION.SDK_INT >= 23) {
            String[] mPermisstion = new String[]{
                    Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.CALL_PHONE, Manifest.permission.READ_LOGS, Manifest.permission.READ_PHONE_STATE, Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.SET_DEBUG_APP, Manifest.permission.SYSTEM_ALERT_WINDOW, Manifest.permission.GET_ACCOUNTS, Manifest.permission.WRITE_APN_SETTINGS
            };
            ActivityCompat.requestPermissions(this, mPermisstion, 100);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == 100) {
            Log.e("MainActivity", "获取权限成功");
        }
    }

    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.btn_scan:
                Intent intent = new Intent(MainActivity.this,CaptureActivity.class);
                startActivityForResult(intent,REQUEST_CODE);
                break;
            case R.id.btn_create_QRCode:
                String info = etInfo.getText().toString();
                if (TextUtils.isEmpty(info)){
                    Toast.makeText(MainActivity.this,"输入不能为空",Toast.LENGTH_SHORT).show();
                    return;
                }
                Bitmap bitmap = CodeUtils.createImage(info,400,400,BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher));
                ivQRCode.setImageBitmap(bitmap);
                break;
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        /*
         * 处理结果
         * */
        if (requestCode==REQUEST_CODE){
            // 处理扫描结果
            if (null!=data){
                Bundle bundle = data.getExtras();
                if (bundle==null){
                    return;
                }
               if (bundle.getInt(CodeUtils.RESULT_TYPE)==CodeUtils.RESULT_SUCCESS){
                   String result = bundle.getString(CodeUtils.RESULT_STRING);
                  // Toast.makeText(this,"解析结果："+result,Toast.LENGTH_LONG).show();
                   Intent intent = new Intent(MainActivity.this,JumpActivity.class);
                   intent.putExtra("path",result);
                   startActivity(intent);

               }else if (bundle.getInt(CodeUtils.RESULT_TYPE)==CodeUtils.RESULT_FAILED){
                   Toast.makeText(this,"解析失败",Toast.LENGTH_SHORT).show();
               }
            }

        }
    }
}

权限

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