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"/>