Android中 使用 zxing 集成扫描二维码的功能

第一步: 导入依赖:

compile project(':libzxing')
compile project(path: ':libzxing')

第二步:  导入module依赖包:

------------------MainActivity------------------

package com.example.earl.myerwenma;

import android.content.Intent;
import android.graphics.Bitmap;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
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 AppCompatActivity {
   
    private static final String TAG = "MainActivity";
    private final int REQUESTCODE = 0;//请求吗
    private final int RESULTCODE = 1;//结果码
    private TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button start = (Button) findViewById(R.id.start);
        Button create = (Button) findViewById(R.id.create);
        final EditText content = (EditText) findViewById(R.id.content);
        final ImageView bit = (ImageView) findViewById(R.id.bit);
        textView = (TextView) findViewById(R.id.result_0);
        //开始扫描按钮
        start.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                
                startActivityForResult(new Intent(MainActivity.this, CaptureActivity.class), REQUESTCODE);
            
            }
        });
        //生成二维码按钮
        create.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String content_string = content.getText().toString();
                Log.d(TAG, "onClick() returned: " + "取到的内容---" + content_string);
                Bitmap bitmap = EncodingUtils.createQRCode(content_string, 200, 200, null);
                bit.setImageBitmap(bitmap);
            }
        });
    }

    //接收返回结果
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        Log.d(TAG, "onActivityResult() returned: " + "接收结果.....");

        if (resultCode == RESULT_OK) {
            Log.d(TAG, "onActivityResult() returned: " + "返回成功");
            Bundle bundle = data.getExtras();
            String result = bundle.getString("result");
            textView.setText(result);
            Log.d(TAG, "----" + result + "---");

        }

    }
}

-------------------activity_main.xml--------------------

<?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"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/start"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="开始扫描"
        />

    <TextView
        android:id="@+id/result"
        android:text="扫描结果是："
        android:textSize="30sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
    <TextView
        android:id="@+id/result_0"
        android:text=""
        android:textSize="35sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <EditText
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
    <Button
        android:id="@+id/create"
        android:text="生成二维码"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
    <ImageView
        android:id="@+id/bit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</LinearLayout>