Android之二维码扫描和生成

一：效果图

二：实现步骤

1.导入第三方架包，下载地址：

http://download.csdn.net/detail/android_cll/9784977

2.在项目build.gradle文件下加入相应的包

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

3.一个图片的Util工具类

package com.uuch.android_zxinglibrary;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;/*** 文 件 名: ImageUtil* 创 建 人: 曹刘浪* 创建日期: 2017-3-18 12:12*/public class ImageUtil {/*** 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 addressif (isGooglePhotosUri(imageUri))return imageUri.getLastPathSegment();return getDataColumn(context, imageUri, null, null);}// Fileelse 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.第一个界面的xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/activity_main"android:layout_width="match_parent"android:layout_height="match_parent"><Buttonandroid:id="@+id/button1"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginLeft="20dp"android:layout_marginRight="20dp"android:layout_marginTop="20dp"android:background="#ff0000"android:text="二维码扫描"android:textColor="#fff" /><Buttonandroid:id="@+id/button4"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_below="@+id/button1"android:layout_marginLeft="20dp"android:layout_marginRight="20dp"android:layout_marginTop="20dp"android:background="#ff0000"android:text="二维码生成"android:textColor="#fff" /></RelativeLayout>

5.MainActivity

package com.uuch.android_zxinglibrary;import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;import com.uuzuche.lib_zxing.activity.CaptureActivity;
import com.uuzuche.lib_zxing.activity.CodeUtils;import java.util.List;import pub.devrel.easypermissions.AfterPermissionGranted;
import pub.devrel.easypermissions.AppSettingsDialog;
import pub.devrel.easypermissions.EasyPermissions;public class MainActivity extends Activity implements EasyPermissions.PermissionCallbacks{/*** 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;public Button button1 = null;public Button button4 = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);/*** 初始化组件*/initView();}/*** 初始化组件*/private void initView() {button1 = (Button) findViewById(R.id.button1);button4 = (Button) findViewById(R.id.button4);/*** 二维码扫描界面*** 生成二维码图片*/button1.setOnClickListener(new ButtonOnClickListener(button1.getId()));button4.setOnClickListener(new ButtonOnClickListener(button4.getId()));}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent 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();} 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();}}}/*** 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() {@Overridepublic void onAnalyzeSuccess(Bitmap mBitmap, String result) {Toast.makeText(MainActivity.this, "解析结果:" + result, Toast.LENGTH_LONG).show();}@Overridepublic void onAnalyzeFailed() {Toast.makeText(MainActivity.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();}}/*** 请求CAMERA权限码*/public static final int REQUEST_CAMERA_PERM = 101;/*** EsayPermissions接管权限处理逻辑* @param requestCode* @param permissions* @param grantResults*/@Overridepublic void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {super.onRequestPermissionsResult(requestCode, permissions, grantResults);// Forward results to EasyPermissionsEasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);}@AfterPermissionGranted(REQUEST_CAMERA_PERM)public void cameraTask(int viewId) {if (EasyPermissions.hasPermissions(this, Manifest.permission.CAMERA)) {// Have permission, do the thing!onClick(viewId);} else {// Ask for one permissionEasyPermissions.requestPermissions(this, "需要请求camera权限",REQUEST_CAMERA_PERM, Manifest.permission.CAMERA);}}@Overridepublic void onPermissionsGranted(int requestCode, List<String> perms) {Toast.makeText(this, "执行onPermissionsGranted()...", Toast.LENGTH_SHORT).show();}@Overridepublic void onPermissionsDenied(int requestCode, List<String> perms) {Toast.makeText(this, "执行onPermissionsDenied()...", Toast.LENGTH_SHORT).show();if (EasyPermissions.somePermissionPermanentlyDenied(this, perms)) {new AppSettingsDialog.Builder(this, "当前App需要申请camera权限,需要打开设置页面么?").setTitle("权限申请").setPositiveButton("确认").setNegativeButton("取消", null /* click listener */).setRequestCode(REQUEST_CAMERA_PERM).build().show();}}/*** 按钮点击监听*/class ButtonOnClickListener implements View.OnClickListener{private int buttonId;public ButtonOnClickListener(int buttonId) {this.buttonId = buttonId;}@Overridepublic void onClick(View v) {if (v.getId() == R.id.button4) {Intent intent = new Intent(MainActivity.this, ThreeActivity.class);startActivity(intent);} else {cameraTask(buttonId);}}}/*** 按钮点击事件处理逻辑* @param buttonId*/private void onClick(int buttonId) {switch (buttonId) {case R.id.button1:Intent intent = new Intent(getApplication(), CaptureActivity.class);startActivityForResult(intent, REQUEST_CODE);break;default:break;}}
}

6.二维码生成界面的xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:fitsSystemWindows="true"><EditTextandroid:id="@+id/edit_content"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginLeft="20dp"android:layout_marginRight="20dp"android:layout_marginTop="20dp"android:minLines="3" /><Buttonandroid:id="@+id/button_content"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_below="@+id/edit_content"android:layout_marginLeft="20dp"android:layout_marginRight="20dp"android:layout_marginTop="20dp"android:text="生成logo二维码图片"android:visibility="gone" /><Buttonandroid:id="@+id/button1_content"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_below="@+id/button_content"android:layout_marginLeft="20dp"android:layout_marginRight="20dp"android:layout_marginTop="20dp"android:text="生成普通二维码图片" /><ImageViewandroid:id="@+id/image_content"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_below="@+id/button1_content"android:layout_centerHorizontal="true"android:layout_marginTop="20dp" /></RelativeLayout>

7.二维码生成ThreeActivity

package com.uuch.android_zxinglibrary;import android.app.Activity;
import android.graphics.Bitmap;
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.Toast;import com.uuzuche.lib_zxing.activity.CodeUtils;public class ThreeActivity extends Activity {public EditText editText = null;public Button button1 = null;public ImageView imageView = null;public Bitmap mBitmap = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_three);initView();}/*** 初始化组件*/private void initView() {editText = (EditText) findViewById(R.id.edit_content);button1 = (Button) findViewById(R.id.button1_content);imageView = (ImageView) findViewById(R.id.image_content);/*** 生成不带logo的二维码图片*/button1.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {String textContent = editText.getText().toString();if (TextUtils.isEmpty(textContent)) {Toast.makeText(ThreeActivity.this, "您的输入为空!", Toast.LENGTH_SHORT).show();return;}editText.setText("");mBitmap = CodeUtils.createImage(textContent, 400, 400, null);imageView.setImageBitmap(mBitmap);}});}}

8.去AppLication初始化

package com.uuch.android_zxinglibrary;import android.app.Application;import com.uuzuche.lib_zxing.activity.ZXingLibrary;public class MApplication extends Application{@Overridepublic void onCreate() {super.onCreate();ZXingLibrary.initDisplayOpinion(this);}
}

9.在AndroidManifest.xml文件中加上权限

<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" />

------------------------到这应该都已经写完了这个功能，大神勿喷，不会的或者想节约时间的可以下载源码、

源码地址：http://download.csdn.net/detail/android_cll/9785625

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Android之二维码扫描和生成

一：效果图

二：实现步骤

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