Android利用ZXing扫描二维码的实例代码解析

package com.fanyafeng.barcode.activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import com.fanyafeng.barcode.R;
import com.fanyafeng.barcode.BaseActivity;
import com.fanyafeng.barcode.util.ImageUtil;
import com.fanyafeng.barcode.zxing.activity.CaptureActivity;
import com.fanyafeng.barcode.zxing.activity.CodeUtils;
//需要搭配baseactivity，这里默认为baseactivity,并且默认Baseactivity为包名的根目录
public class ScanCodeActivity extends BaseActivity {
  /**
   * 扫描跳转Activity RequestCode
   */
  public static final int REQUEST_CODE = 111;
  /**
   * 选择系统图片Request Code
   */
  public static final int REQUEST_IMAGE = 112;
  /**
   * 请求CAMERA权限码
   */
  public static final int REQUEST_CAMERA_PERM = 101;
  private TextView tvResult;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_scan_code);
//这里默认使用的是toolbar的左上角标题，如果需要使用的标题为中心的采用下方注释的代码，将此注释掉即可
    title = getString(R.string.title_activity_scan_code);
    initView();
    initData();
  }
  //初始化UI空间
  private void initView() {
    tvResult = (TextView) findViewById(R.id.tvResult);
  }
  //初始化数据
  private void initData() {
  }
  @Override
  public void onClick(View v) {
    super.onClick(v);
    switch (v.getId()) {
      case R.id.btnScan:
        Intent intent = new Intent(getApplication(), CaptureActivity.class);
        startActivityForResult(intent, REQUEST_CODE);
//        本地扫描，识别相册中的二维码
//        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
//        intent.addCategory(Intent.CATEGORY_OPENABLE);
//        intent.setType("image/*");
//        startActivityForResult(intent, REQUEST_IMAGE);
        break;
    }
  }
  @Override
  protected void onActivityResult(final int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    /**
     * 处理二维码扫描结果
     */
    if (requestCode == REQUEST_CODE) {
      //处理扫描结果（在界面上显示）
      if (null != data) {
        Bundle bundle = data.getExtras();
        if (bundle == null) {
          return;
        }
        if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_SUCCESS) {
          String result = bundle.getString(CodeUtils.RESULT_STRING);
          Toast.makeText(this, "解析结果:" + result, Toast.LENGTH_LONG).show();
          tvResult.setText(result);
        } else if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_FAILED) {
          Toast.makeText(ScanCodeActivity.this, "解析二维码失败", Toast.LENGTH_LONG).show();
        }
      }
    }
    /**
     * 选择系统图片并解析
     */
    else if (requestCode == REQUEST_IMAGE) {
      if (data != null) {
        Uri uri = data.getData();
        try {
          CodeUtils.analyzeBitmap(ImageUtil.getImageAbsolutePath(this, uri), new CodeUtils.AnalyzeCallback() {
            @Override
            public void onAnalyzeSuccess(Bitmap mBitmap, String result) {
              Toast.makeText(ScanCodeActivity.this, "解析结果:" + result, Toast.LENGTH_LONG).show();
              tvResult.setText(result);
            }
            @Override
            public void onAnalyzeFailed() {
              Toast.makeText(ScanCodeActivity.this, "解析二维码失败", Toast.LENGTH_LONG).show();
            }
          });
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    } else if (requestCode == REQUEST_CAMERA_PERM) {
      Toast.makeText(this, "从设置页面返回...", Toast.LENGTH_SHORT).show();
    }
  }
}