二维码的生成

　这是一个二维码扫描的教程

使用的依赖包在这里，http://download.csdn.net/detail/github_35546522/9651725

下载后需要import 后直接配置下依赖即可

//布局文件

<?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:orientation="vertical">

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

    <TextView
        android:id="@+id/tv_decode"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="扫描结果：" />
    <EditText
        android:id="@+id/et_encode"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:hint="请输入要编译的文字" />
    <Button
        android:id="@+id/bt_encode"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="bt_encode"
        android:text="生成二維碼" />

    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="是否编译logo"
        android:id="@+id/cb_ishavelogo"
        android:checked="false" />
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/img_encoderesult" />
</LinearLayout>

//逻辑的处理

package com.qg.lizhanqi;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.xys.libzxing.zxing.activity.CaptureActivity;
import com.xys.libzxing.zxing.encoding.EncodingUtils;

public class MainActivity extends AppCompatActivity {
    private Button btDecode;
    private TextView tvDecode;
    private EditText etEncode;
    private Button btEncode;
    private CheckBox cbIshavelogo;
    private ImageView imgEncoderesult;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btDecode = (Button) findViewById(R.id.bt_decode);
        tvDecode = (TextView) findViewById(R.id.tv_decode);
        etEncode = (EditText) findViewById(R.id.et_encode);
        btEncode = (Button) findViewById(R.id.bt_encode);
        cbIshavelogo = (CheckBox) findViewById(R.id.cb_ishavelogo);
        imgEncoderesult = (ImageView) findViewById(R.id.img_encoderesult);
    }

    //扫描解码
    public void bt_decode(View view) {
        startActivityForResult(new Intent(this, CaptureActivity.class), 0);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) {
            Bundle bundle = data.getExtras();
            String result = bundle.getString("result");
            //显示到TextView上
            tvDecode.setText(result);
            //处理扫描结果
            lastwork(result);
        }
    }
    //处理扫描结果的方法
    private void lastwork(String result) {
        if(result.startsWith("http://")||result.startsWith("https://")){//网页
            //跳转到浏览器加载网页
            Intent it = new Intent(Intent.ACTION_VIEW);//跳转意图
            it.setData(Uri.parse(result));//设置跳转携带的参数
            startActivity(it);//跳转
            // finish(); //关闭当前页面
        }else if(result.startsWith("tel:")){//电话
            Intent it = new Intent(Intent.ACTION_DIAL);
            it.setData(Uri.parse(result));
            startActivity(it);
        }else if(result.startsWith("smsto:")){//短信
            Intent it = new Intent(Intent.ACTION_SENDTO);
            it.setData(Uri.parse(result));
            startActivity(it);
        }else if(result.startsWith("mailto:")){//邮件
            Intent it = new Intent(Intent.ACTION_SENDTO);
            it.setData(Uri.parse(result));
            startActivity(it);
        }else if(result.startsWith("market://")){//应用市场
            Intent it = new Intent(Intent.ACTION_SENDTO);
            it.setData(Uri.parse(result));
            startActivity(it);
        }else{//其他的弹窗显示
            Toast.makeText(MainActivity.this, result, Toast.LENGTH_SHORT).show();
        }
    }
    //生成二维码图
    public void bt_encode(View view) {
        String text = etEncode.getText().toString().trim();
        if (TextUtils.isEmpty(text)) {
            Toast.makeText(MainActivity.this, "无可编译的字段", Toast.LENGTH_SHORT).show();
        } else {
            //      createQRCode(文本，宽，高，logo图片)
            // Bitmap qrCode = EncodingUtils.createQRCode(text, 500, 500, null);//最基本的
            //使用三目运算符判断选择框是否选中，生成是否带有logo的二维码图片
            Bitmap qrCode = EncodingUtils.createQRCode(text, 500, 500, cbIshavelogo.isChecked() ? BitmapFactory.decodeResource(getResources(), R.drawable.logo) : null);
            imgEncoderesult.setImageBitmap(qrCode);
        }
    }
}