原理：扫描或识别图片中的二维码后，解析其内容，打开WiFi管理器，加入此WiFi。
实现步骤：
1.导入依赖库；
2.封装识别指定路径下二维码图片的方法；
3.获取WiFi的账号密码
4.打开WiFi管理器，连接此WiFi
1.导入依赖库
implementation 'com.google.zxing:core:3.2.1'implementation 'cn.bingoogolapple:bga-qrcodecore:1.1.7@aar'implementation 'cn.bingoogolapple:bga-zxing:1.1.7@aar'
2.封装识别指定路径下二维码图片的方法；
import android.graphics.Bitmap;import android.graphics.BitmapFactory;import com.google.zxing.BarcodeFormat;import com.google.zxing.BinaryBitmap;import com.google.zxing.DecodeHintType;import com.google.zxing.MultiFormatReader;import com.google.zxing.RGBLuminanceSource;import com.google.zxing.Result;import com.mon.GlobalHistogramBinarizer;import com.mon.HybridBinarizer;import java.util.ArrayList;import java.util.EnumMap;import java.util.List;import java.util.Map;public class QRCodeUtil {private static final String TAG = "QRCodeUtil";private static final Map<DecodeHintType, Object> HINTS = new EnumMap<>(DecodeHintType.class);static {List<BarcodeFormat> allFormats = new ArrayList<>();allFormats.add(BarcodeFormat.AZTEC);allFormats.add(BarcodeFormat.CODABAR);allFormats.add(BarcodeFormat.CODE_39);allFormats.add(BarcodeFormat.CODE_93);allFormats.add(BarcodeFormat.CODE_128);allFormats.add(BarcodeFormat.DATA_MATRIX);allFormats.add(BarcodeFormat.EAN_8);allFormats.add(BarcodeFormat.EAN_13);allFormats.add(BarcodeFormat.ITF);allFormats.add(BarcodeFormat.MAXICODE);allFormats.add(BarcodeFormat.PDF_417);allFormats.add(BarcodeFormat.QR_CODE);allFormats.add(BarcodeFormat.RSS_14);allFormats.add(BarcodeFormat.RSS_EXPANDED);allFormats.add(BarcodeFormat.UPC_A);allFormats.add(BarcodeFormat.UPC_E);allFormats.add(BarcodeFormat.UPC_EAN_EXTENSION);HINTS.put(DecodeHintType.TRY_HARDER, BarcodeFormat.QR_CODE);HINTS.put(DecodeHintType.POSSIBLE_FORMATS, allFormats);HINTS.put(DecodeHintType.CHARACTER_SET, "utf-8");}/*** 同步解析本地图片二维码。该方法是耗时操作，请在子线程中调用。** @param picturePath 要解析的二维码图片本地路径* @return 返回二维码图片里的内容 或 null*/public static String syncDecodeQRCode(String picturePath) {return syncDecodeQRCode(getDecodeAbleBitmap(picturePath));}/*** 同步解析bitmap二维码。该方法是耗时操作，请在子线程中调用。** @param bitmap 要解析的二维码图片* @return 返回二维码图片里的内容 或 null*/private static String syncDecodeQRCode(Bitmap bitmap) {Result result = null;RGBLuminanceSource source = null;try {int width = bitmap.getWidth();int height = bitmap.getHeight();int[] pixels = new int[width * height];bitmap.getPixels(pixels, 0, width, 0, 0, width, height);source = new RGBLuminanceSource(width, height, pixels);result = new MultiFormatReader().decode(new BinaryBitmap(new HybridBinarizer(source)), HINTS);return result.getText();} catch (Exception e) {e.printStackTrace();if (source != null) {try {result = new MultiFormatReader().decode(new BinaryBitmap(new GlobalHistogramBinarizer(source)), HINTS);return result.getText();} catch (Throwable e2) {e2.printStackTrace();}}return null;}}/*** 将本地图片文件转换成可解码二维码的 Bitmap。为了避免图片太大，这里对图片进行了压缩。* 感谢 /devilsen 提的 PR** @param picturePath 本地图片文件路径* @return*/private static Bitmap getDecodeAbleBitmap(String picturePath) {try {BitmapFactory.Options options = new BitmapFactory.Options();options.inJustDecodeBounds = true;BitmapFactory.decodeFile(picturePath, options);int sampleSize = options.outHeight / 400;if (sampleSize <= 0) {sampleSize = 1;}options.inSampleSize = sampleSize;options.inJustDecodeBounds = false;return BitmapFactory.decodeFile(picturePath, options);} catch (Exception e) {return null;}}}
3.获取WiFi的账号和密码。
调用第2步中封装的识别图片二维码的方法
String strResult = QRCodeUtil.syncDecodeQRCode("/storage/emulated/0/test.png");Log.d(TAG, "result: " + strResult);
字符串分割，获取网络名，密码及网络类型。
String netWorkNameTemp = strResult.substring(strResult.indexOf("S:"));netWorkName = netWorkNameTemp.substring(3, netWorkNameTemp.indexOf(";") - 1);String netWorkTypeTemp = strResult.substring(strResult.indexOf("T:"));netWorkType = netWorkTypeTemp.substring(2, netWorkTypeTemp.indexOf(";"));String passwordTemp = strResult.substring(strResult.indexOf("P:"));password = passwordTemp.substring(3, passwordTemp.indexOf(";") - 1);Log.i(TAG, "netWorkName: " + netWorkName + " netWorkType: " + netWorkType + " password: " + password);
4.打开WiFi管理器，连接此WiFi
if (!wifiAdmin.mWifiManager.isWifiEnabled()) {wifiAdmin.openWifi();}int netType;if (pareToIgnoreCase("wpa") == 0) {netType = WifiAdmin.TYPE_WPA;} else if (pareToIgnoreCase("wep") == 0) {netType = WifiAdmin.TYPE_WEP;} else {netType = WifiAdmin.TYPE_NO_PWD;}wifiAdmin.addNetwork(netWorkName, password, netType);
5.参考
/p/14ce26f5a5c7
/android_cmos/article/details/52214560
