在android上实现二维码生成和扫描

先在androidstudio上导入libzing的Module，然后再app上把那个libzing添加上去，这样我们的app就关联了那个libzing库了

点击libzing下载地址

然后我们就只在app这个工程下写代码就行了。activity_main.xml布局如下

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:orientation="vertical"    tools:context="com.example.edu.myqrcode.MainActivity">    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="start scan"        android:onClick="scan"/>    <TextView        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="Ruselt"        android:textSize="26sp"/>    <TextView        android:id="@+id/tv_ruselt"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:textSize="26sp"/>    <EditText        android:id="@+id/et_text"        android:layout_width="match_parent"        android:layout_height="wrap_content" />    <Button        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="make"        android:text="make QRCode"/>    <CheckBox        android:id="@+id/is_logo"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="check"/>    <ImageView        android:id="@+id/img"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@mipmap/ic_launcher"        android:layout_gravity="center"/></LinearLayout>

Mainactivity.java

import android.app.Activity;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.view.View;import android.widget.CheckBox;import android.widget.EditText;import android.widget.ImageView;import android.widget.TextView;import com.xys.libzxing.zxing.activity.CaptureActivity;import com.xys.libzxing.zxing.encoding.EncodingUtils;public class MainActivity extends Activity {    private TextView mTv_Ruslet;    private EditText mInput;    private ImageView mImg;    private CheckBox isLogo;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mTv_Ruslet= (TextView) findViewById(R.id.tv_ruselt);        mInput= (EditText) findViewById(R.id.et_text);        mImg= (ImageView) findViewById(R.id.img);        isLogo= (CheckBox) findViewById(R.id.is_logo);    }    /**     *生成二维码     */    public void make(View view){        String input=mInput.getText().toString().trim();        //生成二维码，然后为二维码增加logo        Bitmap bitmap=EncodingUtils.createQRCode(input,500,500,                isLogo.isChecked()? BitmapFactory.decodeResource(getResources(),                        R.mipmap.ic_launcher):null                );        mImg.setImageBitmap(bitmap);    }    /**     *  扫描二维码     */    public void scan(View view){        startActivityForResult(new Intent(MainActivity.this, CaptureActivity.class),0);    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        //Log.i("TAG","resultCode: "+resultCode+" result_ok: "+RESULT_OK);        if (resultCode==RESULT_OK){            Bundle bundle=data.getExtras();            String result= bundle.getString("result");            mTv_Ruslet.setText(result);        } if(resultCode == RESULT_CANCELED) {            mTv_Ruslet.setText("扫描出错");        }    }}

运行结果：扫描跟生成二维码都是ok的