二维码生成,扫描

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1. 在project的build.gradle添加如下代码(如下图）

allprojects {    repositories {        jcenter()        maven { url "https://jitpack.io" }    }}

2. 在Module的build.gradle添加依赖

compile 'com.github.open-android:Zxing:v1.0.3'

3.清单文件添加权限

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

4.添加布局视图并在MainActivity中添加id

4.1：

?xml version="1.0" encoding="utf-8"?><LinearLayout    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="test.bwie.com.wzq_17108.MainActivity"    android:orientation="vertical">    <EditText        android:id="@+id/et"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:hint="输入内容，生成二维码"        android:text="http://baidu.com" />    <Button        android:id="@+id/btn2"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="生成二维码" />    <Button        android:id="@+id/btn1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="扫码（支持识别相册二维码）" />    <ImageView        android:id="@+id/image"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center_horizontal" />    <TextView        android:id="@+id/tv_result"        android:text="扫描返回bitmap"        android:gravity="center"        android:textSize="18sp"        android:textColor="#FF0000"        android:layout_marginTop="30dp"        android:layout_width="match_parent"        android:layout_height="wrap_content" />    <ImageView        android:id="@+id/image_callback"        android:layout_marginTop="10dp"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center_horizontal" /></LinearLayout>

4.2 ：界面添加ID和点击事件继承调用扫描和生成二维码功能

implements View.OnClickListener

public class MainActivity extends AppCompatActivity implements View.OnClickListener{    private Button mBtn1;    private EditText mEt;    private Button mBtn2;    private ImageView mImage;    private final static int REQ_CODE = 1028;    private Context mContext;    private TextView mTvResult;    private ImageView mImageCallback;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //控件的点击事件和 Id        initView();        mContext = this;    }    private void initView() {        //id控件        mEt = (EditText) findViewById(R.id.et);        mBtn1 = (Button) findViewById(R.id.btn1);        mBtn2 = (Button) findViewById(R.id.btn2);        mImage = (ImageView) findViewById(R.id.image);        mTvResult = (TextView) findViewById(R.id.tv_result);        mImageCallback = (ImageView) findViewById(R.id.image_callback);        //点击事件        mBtn1.setOnClickListener(this);        mBtn2.setOnClickListener(this);        mImage.setOnClickListener(this);        mTvResult.setOnClickListener(this);        mImageCallback.setOnClickListener(this);    }    //重写的onclick 事件    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.btn1://                startActivity(new Intent(MainActivity.this, CaptureActivity.class));                Intent intent = new Intent(mContext, CaptureActivity.class);                startActivityForResult(intent, REQ_CODE);                break;            case R.id.btn2:                mImage.setVisibility(View.VISIBLE);                //隐藏扫码结果view                mImageCallback.setVisibility(View.GONE);                mTvResult.setVisibility(View.GONE);                String content = mEt.getText().toString().trim();                Bitmap bitmap = null;                try {                    bitmap = BitmapUtils.create2DCode(content);//根据内容生成二维码                    mTvResult.setVisibility(View.GONE);                    mImage.setImageBitmap(bitmap);                } catch (WriterException e) {                    e.printStackTrace();                }                break;        }    }    //扫描二维码返回的结果    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (requestCode == REQ_CODE) {            mImage.setVisibility(View.GONE);            mTvResult.setVisibility(View.VISIBLE);            mImageCallback.setVisibility(View.VISIBLE);            String result = data.getStringExtra(CaptureActivity.SCAN_QRCODE_RESULT);            Bitmap bitmap = data.getParcelableExtra(CaptureActivity.SCAN_QRCODE_BITMAP);            mTvResult.setText("扫码结果："+result);            showToast("扫码结果：" + result);            if(bitmap != null){                mImageCallback.setImageBitmap(bitmap);//现实扫码图片            }        }    }    //调用返回的二维码 吐司打印    private void showToast(String msg) {        Toast.makeText(mContext, "" + msg, Toast.LENGTH_SHORT).show();    }}

运行效果

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