使用场景

调用手机自带的文件管理 选择文件

  1. /*
  2.  * @Author: Park
  3.  * @QQ：7323650
  4.  * @Date: 2021-08-09
  5.  * @content: 调用Android原生API选择文件并返回路径
  6.  */
  8. "ui";
  10. ui.layout(
  12.     <vertical>
  13.         <button text="选择文件" id="选择" />
  14.     </vertical>
  15. )
  18. ui.选择.on("click", function () {
  19.     var fileType = "text/plain" //选择txt文件 文件类型参考:https://www.w3school.com.cn/media/media_mimeref.asp
  20.     var intent = new Intent();
  21.     intent.setType(fileType);
  22.     intent.setAction(Intent.ACTION_GET_CONTENT);
  23.     activity.startActivityForResult(intent, 5);
  24. })
  26. //监听选择文件回调
  27. activity.getEventEmitter().on("activity_result", (requestCode, resultCode, data) => {
  28.     if (resultCode != -1) {
  29.         toastLog("没有选择文件!");
  30.         文件路径 = ""
  31.         return false;
  32.     } else {
  33.         var uri = data.getData();
  34.         // log("uri: %s", uri.toString());
  35.         let filepath = URIUtils_uriToFile(uri);
  36.         文件路径 = filepath
  37.         toastLog(文件路径);
  38.     }
  39. });
  41. //获取选择的文件路径 >> uri转文件路径
  42. function URIUtils_uriToFile (uri) {
  43.     //Source : https://www.cnblogs.com/panhouye/archive/2017/04/23/6751710.html
  44.     var r = null,
  45.         cursor,
  46.         column_index,
  47.         selection = null,
  48.         selectionArgs = null,
  49.         isKitKat = android.os.Build.VERSION.SDK_INT >= 19,
  50.         docs;
  51.     if (uri.getScheme().equalsIgnoreCase("content")) {
  52.         if (isKitKat && android.provider.DocumentsContract.isDocumentUri(activity, uri)) {
  53.             if (String(uri.getAuthority()) == "com.android.externalstorage.documents") {
  54.                 docs = String(android.provider.DocumentsContract.getDocumentId(uri)).split(":");
  55.                 if (docs[0] == "primary") {
  56.                     return android.os.Environment.getExternalStorageDirectory() + "/" + docs[1];
  57.                 }
  58.             } else if (String(uri.getAuthority()) == "com.android.providers.downloads.documents") {
  59.                 uri = android.content.ContentUris.withAppendedId(
  60.                     android.net.Uri.parse("content://downloads/public_downloads"),
  61.                     parseInt(android.provider.DocumentsContract.getDocumentId(uri))
  62.                 );
  63.             } else if (String(uri.getAuthority()) == "com.android.providers.media.documents") {
  64.                 docs = String(android.provider.DocumentsContract.getDocumentId(uri)).split(":");
  65.                 if (docs[0] == "image") {
  66.                     uri = android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
  67.                 } else if (docs[0] == "video") {
  68.                     uri = android.provider.MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
  69.                 } else if (docs[0] == "audio") {
  70.                     uri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
  71.                 }
  72.                 selection = "_id=?";
  73.                 selectionArgs = [docs[1]];
  74.             }
  75.         }
  76.         try {
  77.             cursor = activity.getContentResolver().query(uri, ["_data"], selection, selectionArgs, null);
  78.             if (cursor && cursor.moveToFirst()) {
  79.                 r = String(cursor.getString(cursor.getColumnIndexOrThrow("_data")));
  80.             }
  81.         } catch (e) {
  82.             log(e);
  83.         }
  84.         if (cursor) cursor.close();
  85.         return r;
  86.     } else if (uri.getScheme().equalsIgnoreCase("file")) {
  87.         return String(uri.getPath());
  88.     }
  89.     return null;
  90. }