public override void OnRequestPermissionsResult(int requestCode, string[] permissions, Permission[] grantResults)
{
if (requestCode == PERMISSION_ReadExternalStorage)
{
if (grantResults[0] == Permission.Granted)
{
Songleton.Instance.AllSongs = MusicRetrieval.LoadSongs(this);
SongListFragment songListFragment = new SongListFragment();
//MusicControlFragment musicControlFragment = new MusicControlFragment ();
MusicControls musicControls = new MusicControls();
//var trans = FragmentManager.BeginTransaction ();以下两条语句极度重要，解决大问题！
Android.Support.V4.App.FragmentManager fragmentManager = SupportFragmentManager;
Android.Support.V4.App.FragmentTransaction trans = fragmentManager.BeginTransaction();
trans.Add(Resource.Id.fragment_container, songListFragment, "songListFragment");
trans.Add(Resource.Id.music_controls_container, musicControls, "musicControls");
trans.Commit();
if (Build.VERSION.SdkInt != Android.OS.BuildVersionCodes.NMr1)
{
Toast.MakeText(this, "读取数据权限已申请", ToastLength.Short).Show();
}
}
else
{
if (Build.VERSION.SdkInt != Android.OS.BuildVersionCodes.NMr1)
{
Toast.MakeText(this, "申请读取数据权限被拒", ToastLength.Short).Show();
}
}
}
}
public void OnPrepared(MediaPlayer mp)
{
player.Start();
MusicControls.songName.Text = Songleton.Instance[SongPos].Title;
MusicControls.songDuration.Text = getTime(player.Duration);
MusicControls.ThreadHandler(0);
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.Main);
//java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/audio/media from pid=17271, uid=10085 requires android.permission.READ_EXTERNAL_STORAGE
//6.0及以上需要动态申请权限
if (Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.M)
{
//RequestWriteSettings();
bool isGrant = ActivityCompat.CheckSelfPermission(this, Manifest.Permission.ReadExternalStorage) == Permission.Granted;
if (isGrant == false)
{
ActivityCompat.RequestPermissions(this, new string[] { Manifest.Permission.ReadExternalStorage }, PERMISSION_ReadExternalStorage);
}
else
{
Songleton.Instance.AllSongs = MusicRetrieval.LoadSongs(this);
if (savedInstanceState == null)
{
SongListFragment songListFragment = new SongListFragment();
//MusicControlFragment musicControlFragment = new MusicControlFragment ();
MusicControls musicControls = new MusicControls();
//var trans = FragmentManager.BeginTransaction ();以下两条语句极度重要，解决大问题！
Android.Support.V4.App.FragmentManager fragmentManager = SupportFragmentManager;
Android.Support.V4.App.FragmentTransaction trans = fragmentManager.BeginTransaction();
trans.Add(Resource.Id.fragment_container, songListFragment, "songListFragment");
trans.Add(Resource.Id.music_controls_container, musicControls, "musicControls");
trans.Commit();
}
//在程序中获取string.xml中字符串和数值
Toast.MakeText(this, this.Resources.GetString(Resource.String.scan_songs) + Songleton.Instance.AllSongs.Count.ToString(), ToastLength.Short).Show();
}
}
}
public void PlaySong()
{
if (MusicControls.musicThread.IsAlive)
{
MusicControls.ThreadHandler(1);
}
player.Reset();
//是因为以下没在主页展示，所以调用时为空指针，报错。先生成再播放
MusicControls.imgPlay.SetImageResource(MusicControls.PAUSE_RESOURCE);
var trackUri = ContentUris.WithAppendedId(MediaStore.Audio.Media.ExternalContentUri, Songleton.Instance[SongPos].Id);
try {
player.SetDataSource(Application.Context, trackUri);
} catch (Exception e) {
Log.Error(MainActivity.MUSIC_ERR_TAG, "Error setting data source", e);
}
player.PrepareAsync();
}