二维码的生成

我们目前用的是谷歌的zxing来生成二维码；下面呢我分别为大家介绍一下简单的二维码，中间有log的二维码，和彩色二维码；

需要两个权限；

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

简单的二维码

首先你点击的按钮去扫一扫二维码

main.xml,这个页面可以自定义

<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:gravity="center_horizontal"android:orientation="vertical"tools:context=".MainActivity" ><Buttonandroid:layout_width="match_parent"android:layout_height="wrap_content"android:onClick="Create2QR"android:text="生成二维码" /><EditTextandroid:id="@+id/ednaem"android:layout_width="match_parent"android:layout_height="wrap_content"android:hint="请输入要生成的文字" /><ImageViewandroid:id="@+id/image"android:layout_width="wrap_content"android:layout_height="wrap_content" /></LinearLayout>

　　camera.xml;直接沾

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent" ><SurfaceViewandroid:id="@+id/preview_view"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center" /><com.zxing.view.ViewfinderViewandroid:id="@+id/viewfinder_view"android:layout_width="wrap_content"android:layout_height="wrap_content" /><RelativeLayoutandroid:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_gravity="center"android:orientation="vertical" ><TextViewandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_alignParentTop="true"android:layout_centerInParent="true"android:background="#b0e0e6"android:gravity="center"android:paddingBottom="10dp"android:paddingTop="10dp"android:text="开始扫描"android:textColor="@android:color/white"android:textSize="24sp"android:textStyle="bold" /><Button android:id="@+id/openLight"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="80dp"android:layout_centerHorizontal="true"android:text="开启闪光灯"android:textColor="@android:color/white"android:onClick="IfOpenLight"android:background="#00000000"android:textSize="16sp"/><Button android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="40dp"android:layout_below="@id/openLight"android:layout_centerHorizontal="true"android:text="从相册中选取照片"android:textColor="@android:color/white"android:onClick="pickPictureFromAblum"android:background="#00000000"android:textSize="16sp"/><Buttonandroid:id="@+id/btn_cancel_scan"android:layout_width="200dp"android:layout_height="60dp"android:layout_alignParentBottom="true"android:layout_centerInParent="true"android:layout_marginBottom="75dp"android:background="#FFA500"android:text="取    消"android:textSize="24sp"android:textStyle="bold" /></RelativeLayout></FrameLayout>

　　Mainactivity.java

package com.exaple.day09rikao;import com.google.zxing.WriterException;
import com.zxing.zxingframe.BitmapUtil;import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;public class MainActivity extends Activity {private ImageView image;private EditText edname;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);image = (ImageView) findViewById(R.id.image);edname = (EditText) findViewById(R.id.ednaem);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.activity_main, menu);return true;}// 鐢熸垚浜岀淮鐮�public void Create2QR(View v) {String uri = edname.getText().toString();// Bitmap bitmap = BitmapUtil.create2DCoderBitmap(uri, mScreenWidth/2,// mScreenWidth/2);Bitmap bitmap;try {bitmap = BitmapUtil.createQRCode(uri, 400);//鐢熸垚浜岀淮鐮乴og//bitmap = addLogo(bitmap, BitmapFactory.decodeResource(getApplicationContext().getResources(), R.drawable.ke));if (bitmap != null) {image.setImageBitmap(bitmap);}} catch (WriterException e) {// TODO Auto-generated catch blocke.printStackTrace();}}/*** 鍦ㄤ簩缁寸爜涓棿娣诲姞Logo鍥炬*/private static Bitmap addLogo(Bitmap src, Bitmap logo) {if (src == null) {return null;}if (logo == null) {return src;}//鑾峰彇鍥剧墖鐨勫楂�int srcWidth = src.getWidth();int srcHeight = src.getHeight();int logoWidth = logo.getWidth();int logoHeight = logo.getHeight();if (srcWidth == 0 || srcHeight == 0) {return null;}if (logoWidth == 0 || logoHeight == 0) {return src;}//logo澶у皬涓轰簩缁寸爜鏁翠綋澶у皬鐨�/5float scaleFactor = srcWidth * 1.0f / 5 / logoWidth;Bitmap bitmap = Bitmap.createBitmap(srcWidth, srcHeight, Bitmap.Config.ARGB_8888);try {Canvas canvas = new Canvas(bitmap);canvas.drawBitmap(src, 0, 0, null);canvas.scale(scaleFactor, scaleFactor, srcWidth / 2, srcHeight / 2);canvas.drawBitmap(logo, (srcWidth - logoWidth) / 2, (srcHeight - logoHeight) / 2, null);canvas.save(Canvas.ALL_SAVE_FLAG);canvas.restore();} catch (Exception e) {bitmap = null;e.getStackTrace();}return bitmap;}}