简单实现二维码扫描以及生成二维码

//首先导入依赖

implementation 'cn.yipianfengye.android:zxing-library:2.2'

//在布局文件中

    <Button
        android:id="@+id/button_1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="扫描二维码"
        />

    <EditText
        android:id="@+id/edit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />
    <Button
        android:id="@+id/button_2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="生成不带logo的二维码"
        />
    <Button
        android:id="@+id/button_3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="生成带logo的二维码"
        />

    <ImageView
        android:id="@+id/img"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:src="@mipmap/ic_launcher"
        />

//在主页面中重写onactivityresult的方法（扫描二维码时需要写）
（request_code）是自己定义的int常量

 @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode==request_code){
            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_SHORT).show();
                }if (bundle.getInt(CodeUtils.RESULT_TYPE)==CodeUtils.RESULT_FAILED){
                    Toast.makeText(this,"解析失败",Toast.LENGTH_SHORT).show();
                }
            }
        }
    }

//扫描二维码

Intent intent=new Intent(MainActivity.this,CaptureActivity.class);
                startActivityForResult(intent,request_code);

//生成不带logo的二维码

 String text = edittext.getText().toString();
                if (TextUtils.isEmpty(text)){
                    Toast.makeText(this,"您输入的为空",Toast.LENGTH_SHORT).show();
                    return;
                }
                edittext.setText("");
                Bitmap bitmap = CodeUtils.createImage(text, 400, 400, null);
                img.setImageBitmap(bitmap);

//生成带logo的二维码

 text2 = edittext.getText().toString();
                if (TextUtils.isEmpty(text2)) {
                    Toast.makeText(this, "您的输入为空!", Toast.LENGTH_SHORT).show();
                    return;
                }

                bitmap = CodeUtils.createImage(text2, 400, 400, BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher));
                img.setImageBitmap(bitmap);

//定义全局配置类

public class App extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        ZXingLibrary.initDisplayOpinion(this);
    }
}

//清单文件中配置权限

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

//以及application中配置name

android:name=".App"