cordova自定义插件-二维码识别

package com.wy.plugin; import android.annotation.TargetApi; import android.content.ContentUris; import android.content.Context; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.Uri; import android.os.Build; import android.os.Environment; import android.provider.DocumentsContract; import android.provider.MediaStore; import android.text.TextUtils; import android.util.Log; import com.google.zxing.BinaryBitmap; import com.google.zxing.ChecksumException; import com.google.zxing.DecodeHintType; import com.google.zxing.FormatException; import com.google.zxing.LuminanceSource; import com.google.zxing.MultiFormatReader; import com.google.zxing.NotFoundException; import com.google.zxing.PlanarYUVLuminanceSource; import com.google.zxing.Result; import com.google.zxing.common.HybridBinarizer; import com.google.zxing.qrcode.QRCodeReader; import java.io.UnsupportedEncodingException; import java.nio.charset.Charset; import java.util.Hashtable; /** * Created by wangying on 17-9-1. */ public class Utils { public static Bitmap scanBitmap = null; // public static final boolean isChineseCharacter(String chineseStr) { // char[] charArray = chineseStr.toCharArray(); // for (int i = 0; i < charArray.length; i++) { // // 是否是Unicode编码,除了"�"这个字符.这个字符要另外处理 // if ((charArray[i] >= '\u0000' && charArray[i] < '\uFFFD') // || ((charArray[i] > '\uFFFD' && charArray[i] < '\uFFFF'))) { // continue; // } else { // return false; // } // } // return true; // } /** * Get a file path from a Uri. This will get the the path for Storage Access * Framework Documents, as well as the _data field for the MediaStore and * other file-based ContentProviders. * * @param context The context. * @param uri The Uri to query. * @author paulburke */ @TargetApi(19) public static String getPath(final Context context, final Uri uri) { final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT; // DocumentProvider if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) { // ExternalStorageProvider if (isExternalStorageDocument(uri)) { final String docId = DocumentsContract.getDocumentId(uri); final String[] split = docId.split(":"); final String type = split[0]; if ("primary".equalsIgnoreCase(type)) { return Environment.getExternalStorageDirectory() + "/" + split[1]; } // TODO handle non-primary volumes } // DownloadsProvider else if (isDownloadsDocument(uri)) { final String id = DocumentsContract.getDocumentId(uri); final Uri contentUri = ContentUris.withAppendedId( Uri.parse("content://downloads/public_downloads"), Long.valueOf(id)); return getDataColumn(context, contentUri, null, null); } // MediaProvider else if (isMediaDocument(uri)) { final String docId = DocumentsContract.getDocumentId(uri); final String[] split = docId.split(":"); final 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; } final String selection = "_id=?"; final String[] selectionArgs = new String[]{split[1]}; return getDataColumn(context, contentUri, selection, selectionArgs); } } // MediaStore (and general) else if ("content".equalsIgnoreCase(uri.getScheme())) { return getDataColumn(context, uri, null, null); } // File else if ("file".equalsIgnoreCase(uri.getScheme())) { return uri.getPath(); } return null; } /** * Get the value of the data column for this Uri. This is useful for * MediaStore Uris, and other file-based ContentProviders. * * @param context The context. * @param uri The Uri to query. * @param selection (Optional) Filter used in the query. * @param selectionArgs (Optional) Selection arguments used in the query. * @return The value of the _data column, which is typically a file path. */ public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) { Cursor cursor = null; final String column = "_data"; final String[] projection = {column}; try { cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null); if (cursor != null && cursor.moveToFirst()) { final int column_index = cursor.getColumnIndexOrThrow(column); return cursor.getString(column_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()); } /** * //TODO: TAOTAO 将bitmap由RGB转换为YUV //TOOD: 研究中 * * @param bitmap 转换的图形 * @return YUV数据 */ public static byte[] rgb2YUV(Bitmap bitmap) { // 该方法来自QQ空间 int width = bitmap.getWidth(); int height = bitmap.getHeight(); int[] pixels = new int[width * height]; bitmap.getPixels(pixels, 0, width, 0, 0, width, height); int len = width * height; byte[] yuv = new byte[len * 3 / 2]; int y, u, v; for (int i = 0; i < height; i++) { for (int j = 0; j < width; j++) { int rgb = pixels[i * width + j] & 0x00FFFFFF; int r = rgb & 0xFF; int g = (rgb >> 8) & 0xFF; int b = (rgb >> 16) & 0xFF; y = ((66 * r + 129 * g + 25 * b + 128) >> 8) + 16; u = ((-38 * r - 74 * g + 112 * b + 128) >> 8) + 128; v = ((112 * r - 94 * g - 18 * b + 128) >> 8) + 128; y = y < 16 ? 16 : (y > 255 ? 255 : y); u = u < 0 ? 0 : (u > 255 ? 255 : u); v = v < 0 ? 0 : (v > 255 ? 255 : v); yuv[i * width + j] = (byte) y; // yuv[len + (i >> 1) * width + (j & ~1) + 0] = (byte) u; // yuv[len + (i >> 1) * width + (j & ~1) + 1] = (byte) v; } } return yuv; } /**