打开安卓文件时Activity Not FOund Exception

Question

我得到了这个异常

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是正确的，看起来Intent.ACTION_VIEW与该意图数据没有任何匹配，因此没有活动来处理该意图……

致以问候！

Answer 2

将活动添加到mainfist.xml可能会对您有所帮助