Android Zxing QRcode Scanner QRcode掃描

將掃一維二維條碼功能zxing加入自己的app
前置步驟
Step1.下載zxing https://github.com/zxing/zxing/archive/master.zip

Step2. File -> import android這個資料夾

Step3. 去下載的資料夾 android-core 最裡層的CameraConfigurationUtils.java檔案

複製貼到剛剛import下的CaptureActivity\src\com\google\zxing\client\android\camera下。

Step4. 下載core-3.2.0.jar http://mvnrepository.com/artifact/com.google.zxing/core/3.2.0
在CaptureActivity資料夾下建立libs，將core-3.2.0.jar放入。

Step5. 在 CaptureActivity專案點右鍵 -> Properties->點選Android->勾選Android 4.4.2

點選 Java Compiler ->Compiler選擇 compliance level: 1.7

Step6. 點選上方功能列Project -> Clean ->勾選CaptureActivity，
然後回頭去把Android的Is Library打勾

Step7. 打勾後有些檔案會出現錯誤，打開這些檔案，在switch上用滑鼠點一下，按下鍵盤
Ctrl+1，點選Convert'switch' to 'if-else'，每個有錯誤的檔案接照此方法。

---------------------------------------已上完成前置動作---------------------------------------

建立新專案
1.在專案點右鍵 -> Properties->點選Android->點選Add->加入CaptureActivity

2.AndroidManifest.xml

3./res/layout/activity_main.xml

4.MainActivity.java

package tw.android;

import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity {
 
 static final String ACTION_SCAN = "com.google.zxing.client.android.SCAN";

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

 //掃描一維條碼
 public void scanBar(View v) {
  try {
   Intent intent = new Intent(ACTION_SCAN);
   intent.putExtra("SCAN_MODE", "PRODUCT_MODE"); //一維條碼模式
   startActivityForResult(intent, 0);
  } catch (ActivityNotFoundException anfe) {
   
  }
 }
 
 //掃描QRcode
 public void scanQR(View v) {
  try {
   Intent intent = new Intent(ACTION_SCAN);
   intent.putExtra("SCAN_MODE", "QR_CODE_MODE"); //QR code模式
   startActivityForResult(intent, 0);
  } catch (ActivityNotFoundException anfe) {
  
  }
 }

 //傳回結果
 public void onActivityResult(int requestCode, int resultCode, Intent intent) {
  if (requestCode == 0) {
   if (resultCode == RESULT_OK) {
    //get the extras that are returned from the intent
    String contents = intent.getStringExtra("SCAN_RESULT"); //掃描結果
    String format = intent.getStringExtra("SCAN_RESULT_FORMAT");//掃描格式
    Toast toast = Toast.makeText(this, "內容:" + contents + " 格式:" + format, Toast.LENGTH_LONG);
    toast.show();
   }
  }
 }
}

檔案下載:
https://github.com/terryyamg/scannerTest
參考來源:
1.https://github.com/zxing/zxing
2.http://www.androidaz.com/development/zxing-qr-reader-direct-integration
3.http://examples.javacodegeeks.com/android/android-barcode-and-qr-scanner-example/
4.http://mvnrepository.com/artifact/com.google.zxing/core/3.2.0
5.http://stackoverflow.com/questions/11226941/error-in-switch-cases-of-zxing-project-in-android
6.http://stackoverflow.com/questions/24818566/build-library-zxing-for-android-project

Android QRcode

掃描QRcode 讓資訊顯示出來
需要安裝QRDroid
1.activity_main.xml

2.MainActivity.java

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  info = (TextView) findViewById(R.id.info);
  scanner = (Button) findViewById(R.id.scanner);
  scanner.setOnClickListener(new Button.OnClickListener() {
   @Override
   public void onClick(View v) {

    // TODO Auto-generated method stub
    Intent iScaner = new Intent("la.droid.qr.scan"); // 使用QRDroid的掃描功能
    iScaner.putExtra("la.droid.qr.complete", true); // 完整回傳，不截掉scheme
    try {
     // 開啟 QRDroid App 的掃描功能，等待 call back onActivityResult()
     startActivityForResult(iScaner, 0);
    } catch (ActivityNotFoundException ex) {
     // 若沒安裝 QRDroid，則開啟 Google Play商店，並顯示 QRDroid App
     Intent intent = new Intent(Intent.ACTION_VIEW, Uri
       .parse("market://details?id=la.droid.qr"));
     startActivity(intent);
    }
   }
  });
 }

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) { //不需要建立onActivityResult
  super.onActivityResult(requestCode, resultCode, data);

  if (0 == requestCode && null != data && data.getExtras() != null) {
   // 掃描結果存放在 key 為 la.droid.qr.result 的值中
   String result = data.getExtras().getString("la.droid.qr.result");

   info.setText(result); // 將結果顯示在 TextVeiw 中
  }
 }

3.建立QRcode的網站 http://www.quickmark.com.tw/Cht/qrcode-datamatrix-generator/default.asp?qrText
4.掃描圖片

參考來源:
http://elviselle.blogspot.tw/2013/06/android-app-qr-code.html