Zxing二维码的生成与扫描，调起相册

集成二维码

1.添加依赖或libs中添加jar包

compile 'cn.yipianfengye.android:zxing-library:2.1'

2.在Application中初始化

@Override    public void onCreate() {        super.onCreate();        ZXingLibrary.initDisplayOpinion(this);    }

3.代码中集成

--MainActivity

import android.content.ContentResolver;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.provider.MediaStore;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.Toast;import com.uuzuche.lib_zxing.activity.CaptureActivity;import com.uuzuche.lib_zxing.activity.CodeUtils;public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private ImageView images;    private final int REQUEST_CODE = 1;    public static final int REQUEST_IMAGE = 112;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();    }    private void initView() {        Button bu_add = (Button) findViewById(R.id.bu_add);        Button bu_logo = (Button) findViewById(R.id.bu_logo);        Button bu_sao = (Button) findViewById(R.id.bu_sao);        Button bu_photo = (Button) findViewById(R.id.bu_photo);        images = (ImageView) findViewById(R.id.images);        bu_add.setOnClickListener(this);        bu_logo.setOnClickListener(this);        bu_sao.setOnClickListener(this);        bu_photo.setOnClickListener(this);    }    @Override    public void onClick(View v) {        switch (v.getId()) {            //生成二维码            case R.id.bu_add:                Bitmap mBitmap = CodeUtils.createImage("https://ss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=439462059,3529812351&fm=23&gp=0.jpg", 400, 400, null);                images.setImageBitmap(mBitmap);                break;            //生成带logo的二维码            case R.id.bu_logo:                Bitmap mBitmap_tou = CodeUtils.createImage("https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=3193006289,3802606706&fm=23&gp=0.jpg", 400, 400, BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher));                images.setImageBitmap(mBitmap_tou);                break;            //扫描二维码            case R.id.bu_sao:                Intent intent = new Intent(MainActivity.this, CaptureActivity.class);                startActivityForResult(intent, REQUEST_CODE);                break;            //扫描相册中二维码            case R.id.bu_photo:                Intent intents = new Intent(Intent.ACTION_GET_CONTENT);                intents.addCategory(Intent.CATEGORY_OPENABLE);                intents.setType("image/*");                startActivityForResult(intents, REQUEST_IMAGE);                break;        }    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        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();                    //web展示                    Intent intent = new Intent(MainActivity.this, NextActivity.class);                    intent.putExtra("url", result);                    startActivity(intent);                } else if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_FAILED) {                    Toast.makeText(MainActivity.this, "解析二维码失败", Toast.LENGTH_LONG).show();                }            }        }        if (requestCode == REQUEST_IMAGE) {            if (data != null) {                Uri uri = data.getData();                ContentResolver cr = getContentResolver();                try {                    Bitmap mBitmap = MediaStore.Images.Media.getBitmap(cr, uri);//显得到bitmap图片                    CodeUtils.analyzeBitmap(ImageUtils.getImageAbsolutePath(MainActivity.this, uri), new CodeUtils.AnalyzeCallback() {                        @Override                        public void onAnalyzeSuccess(Bitmap mBitmap, String result) {                            Toast.makeText(MainActivity.this, "解析结果:" + result, Toast.LENGTH_LONG).show();                            //web展示                            Intent intent = new Intent(MainActivity.this, NextActivity.class);                            intent.putExtra("url", result);                            startActivity(intent);                        }                        @Override                        public void onAnalyzeFailed() {                            Toast.makeText(MainActivity.this, "解析二维码失败", Toast.LENGTH_LONG).show();                        }                    });                    if (mBitmap != null) {                        mBitmap.recycle();                    }                } catch (Exception e) {                    e.printStackTrace();                }            }        }    }}

--工具类ImageUtils

import android.annotation.TargetApi;import android.content.ContentUris;import android.content.Context;import android.database.Cursor;import android.net.Uri;import android.os.Environment;import android.provider.DocumentsContract;import android.provider.MediaStore;public class ImageUtils {    /**     * 根据Uri获取图片绝对路径，解决Android4.4以上版本Uri转换     *     * @param context     * @param imageUri     */    @TargetApi(19)    public static String getImageAbsolutePath(Context context, Uri imageUri) {        if (context == null || imageUri == null)            return null;        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(context, imageUri)) {            if (isExternalStorageDocument(imageUri)) {                String docId = DocumentsContract.getDocumentId(imageUri);                String[] split = docId.split(":");                String type = split[0];                if ("primary".equalsIgnoreCase(type)) {                    return Environment.getExternalStorageDirectory() + "/" + split[1];                }            } else if (isDownloadsDocument(imageUri)) {                String id = DocumentsContract.getDocumentId(imageUri);                Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));                return getDataColumn(context, contentUri, null, null);            } else if (isMediaDocument(imageUri)) {                String docId = DocumentsContract.getDocumentId(imageUri);                String[] split = docId.split(":");                String type = split[0];                Uri contentUri = null;                if ("image".equals(type)) {                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;                } else if ("video".equals(type)) {                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;                } else if ("audio".equals(type)) {                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;                }                String selection = MediaStore.Images.Media._ID + "=?";                String[] selectionArgs = new String[]{split[1]};                return getDataColumn(context, contentUri, selection, selectionArgs);            }        } // MediaStore (and general)        else if ("content".equalsIgnoreCase(imageUri.getScheme())) {            // Return the remote address            if (isGooglePhotosUri(imageUri))                return imageUri.getLastPathSegment();            return getDataColumn(context, imageUri, null, null);        }        // File        else if ("file".equalsIgnoreCase(imageUri.getScheme())) {            return imageUri.getPath();        }        return null;    }    public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {        Cursor cursor = null;        String column = MediaStore.Images.Media.DATA;        String[] projection = {column};        try {            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);            if (cursor != null && cursor.moveToFirst()) {                int index = cursor.getColumnIndexOrThrow(column);                return cursor.getString(index);            }        } finally {            if (cursor != null)                cursor.close();        }        return null;    }    /**     * @param uri The Uri to check.     * @return Whether the Uri authority is ExternalStorageProvider.     */    public static boolean isExternalStorageDocument(Uri uri) {        return "com.android.externalstorage.documents".equals(uri.getAuthority());    }    /**     * @param uri The Uri to check.     * @return Whether the Uri authority is DownloadsProvider.     */    public static boolean isDownloadsDocument(Uri uri) {        return "com.android.providers.downloads.documents".equals(uri.getAuthority());    }    /**     * @param uri The Uri to check.     * @return Whether the Uri authority is MediaProvider.     */    public static boolean isMediaDocument(Uri uri) {        return "com.android.providers.media.documents".equals(uri.getAuthority());    }    /**     * @param uri The Uri to check.     * @return Whether the Uri authority is Google Photos.     */    public static boolean isGooglePhotosUri(Uri uri) {        return "com.google.android.apps.photos.content".equals(uri.getAuthority());    }}

4.最后别忘加权限

<uses-permission android:name="android.permission.CAMERA" /><uses-permission android:name="android.permission.FLASHLIGHT" /><uses-feature android:name="android.hardware.camera" /><uses-feature android:name="android.hardware.camera.autofocus" /><uses-permission android:name="android.permission.VIBRATE" /><uses-permission android:name="android.permission.WAKE_LOCK" /><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.INTERNET" />