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();    }  }}