115 lines
4.4 KiB
Java
115 lines
4.4 KiB
Java
package com.gh.common.util;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.widget.ImageView;
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import com.gh.gamecenter.retrofit.Response;
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import com.google.zxing.BarcodeFormat;
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import com.google.zxing.EncodeHintType;
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import com.google.zxing.WriterException;
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import com.google.zxing.common.BitMatrix;
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import com.google.zxing.qrcode.QRCodeWriter;
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import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
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import com.lightgame.utils.Utils;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Map;
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import rx.Observable;
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import rx.Subscriber;
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import rx.android.schedulers.AndroidSchedulers;
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import rx.schedulers.Schedulers;
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/**
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* Created by khy on 2016/12/1.
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*/
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public class QRCodeUtils {
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public static void setQRCode(final Context context, final String qrBody, final ImageView mShareQrCodeDv) {
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Observable
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.create(new Observable.OnSubscribe<String>() {
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@Override
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public void call(Subscriber<? super String> subscriber) {
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String filePath = context.getExternalCacheDir().getPath() + "/ShareImg/ShareQRCode.jpg";
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boolean success = QRCodeUtils.createQRImage(qrBody, 200, 200, filePath, context);
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if (success) {
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subscriber.onNext(filePath);
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}
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subscriber.onCompleted();
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}
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})
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.subscribeOn(Schedulers.io())
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.observeOn(AndroidSchedulers.mainThread())
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.subscribe(new Response<String>() {
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@Override
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public void onResponse(String response) {
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super.onResponse(response);
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mShareQrCodeDv.setImageBitmap(BitmapFactory.decodeFile(response));
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}
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});
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}
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/**
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* 生成二维码Bitmap
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*
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* @param content 内容
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* @param widthPix 图片宽度
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* @param heightPix 图片高度
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* @param filePath 用于存储二维码图片的文件路径
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* @return 生成二维码及保存文件是否成功
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*/
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private static boolean createQRImage(String content, int widthPix, int heightPix, String filePath, Context context) {
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try {
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if (content == null || "".equals(content)) {
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return false;
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}
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//配置参数
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Map<EncodeHintType, Object> hints = new HashMap<>();
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hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
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//容错级别
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hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
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//设置空白边距的宽度
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hints.put(EncodeHintType.MARGIN, 0); //default is 4
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// 图像数据转换，使用了矩阵转换
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Utils.log("QRCode====" + content);
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BitMatrix bitMatrix = new QRCodeWriter().encode(content, BarcodeFormat.QR_CODE, widthPix, heightPix, hints);
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int[] pixels = new int[widthPix * heightPix];
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// 下面这里按照二维码的算法，逐个生成二维码的图片，
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// 两个for循环是图片横列扫描的结果
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for (int y = 0; y < heightPix; y++) {
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for (int x = 0; x < widthPix; x++) {
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if (bitMatrix.get(x, y)) {
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pixels[y * widthPix + x] = 0xff000000;
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} else {
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pixels[y * widthPix + x] = 0xffffffff;
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}
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}
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}
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// 生成二维码图片的格式，使用ARGB_8888
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Bitmap bitmap = Bitmap.createBitmap(widthPix, heightPix, Bitmap.Config.ARGB_8888);
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bitmap.setPixels(pixels, 0, widthPix, 0, 0, widthPix, heightPix);
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//检查上级路径
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File file = new File(context.getExternalCacheDir().getPath() + "/ShareImg");
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if (!file.exists()) {
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file.mkdirs();
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}
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//必须使用compress方法将bitmap保存到文件中再进行读取。直接返回的bitmap是没有任何压缩的，内存消耗巨大！
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return bitmap != null && bitmap.compress(Bitmap.CompressFormat.JPEG, 100, new FileOutputStream(filePath));
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} catch (WriterException | IOException e) {
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e.printStackTrace();
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}
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return false;
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}
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}
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