关于扫描二维码

1、关于下载二维码处理包的问题:

github上的那个zxing包太大了，很难使用,应当使用精简包,它的名字为:BarCodeTest

2、eclipse引入工程时，可以参考:http://www.cnblogs.com/SkyD/archive/2010/11/25/1887219.html

     确保引入的工程在工作区间有文件夹

3、引入的工程要设置它的属性，让它变为is_library,以便其他项目能够使用

4、做为使用方，注意添加Library

5、具体使用代码:

1)视图

<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/scan"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="开始扫描二维码" />
    <TextView 
        android:id="@+id/text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />
    <EditText 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/input"
        android:hint="请输入要编码的内容"
        />
    <Button 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/gen"
        android:text="生成二维码"
        />
    <ImageView 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/img"
        android:layout_gravity="center_horizontal"
        />

</LinearLayout>

2)MainActivity代码

package com.zyhui.testqrcode;

import com.google.zxing.WriterException;
import com.zxing.activity.CaptureActivity;
import com.zxing.encoding.EncodingHandler;

import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;

public class MainActivity extends Activity {
    private Button scanButton;
    private TextView text;
    private EditText input;
    private Button genButton;
    private ImageView img;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        text = (TextView) findViewById(R.id.text);
        input = (EditText) findViewById(R.id.input);
        scanButton = (Button) findViewById(R.id.scan);
        scanButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent startScan = new Intent(MainActivity.this, CaptureActivity.class);
                //startActivity(startScan);
                startActivityForResult(startScan, 0);
            }
        });
        
        img = (ImageView) findViewById(R.id.img);
        genButton = (Button) findViewById(R.id.gen);
        genButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String str = input.getText().toString().trim();
                if(TextUtils.isEmpty(str)){
                    Toast.makeText(MainActivity.this, "请输入字符串", Toast.LENGTH_SHORT).show();
                    return;
                }
                
                try {
                    Bitmap qrcode = EncodingHandler.createQRCode(str, 300);
                    img.setImageBitmap(qrcode);
                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        });
    }
    
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode == RESULT_OK){
            String result = data.getExtras().getString("result");
            text.setText(result);
        }
    }

}

3)权限

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