java - 打开文件时未找到 Activity 异常 android

Question

我遇到了这个异常

06-28 21:00:48.792: W/System.err(10272): android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=file:///mnt/sdcard/01 - 3G - Kaise Bataaoon [SongsPK.info] (2).mp3 typ=audio/mpeg }

我正在尝试通过以下代码打开此文件:

    File sdCard = Environment.getExternalStorageDirectory();

                            Intent intnt = new Intent(Intent.ACTION_VIEW);

                            String ext = fileToOpen.substring(fileToOpen.lastIndexOf('.')+1) ;
                            //Intent j = Intent.createChooser(intnt, "Choose an application to open with:");
                            //startActivity(j);
                            File fl = new File(sdCard.getAbsolutePath()+"/"+ fileToOpen);
                            if(fl.exists())
                            {
                                Log.d("FILEMANAGERACTIVITY",fl.getPath() + "0"+ ext);
                                MimeTypeMap mim = MimeTypeMap.getSingleton();
                                String type= mim.getMimeTypeFromExtension(ext);
                                intnt.setDataAndType(Uri.fromFile(fl) , type);
                                startActivity(intnt);
                            }

Answer 1

确保您在 intnt.setDataAndType(Uri.fromFile(fl) , type); 中发送的数据和类型正确，似乎 Intent.ACTION_VIEW 没有任何匹配项 Intent 数据，因此没有 Activity 来处理该 Intent ...

问候!