我正在尝试使用MediaBrowser从活动连接到MediaBrowserService。但是，似乎永远不会调用Option Explicit
Private Sub CheckBox1_Click()
' apply the checkbox value to the spreadsheet
Dim rows As Range
Set rows = Sheet1.Range("RowIDs")
Dim cell As Range
For Each cell In rows
If cell.Value = ComboBox1.Value Then
cell.Offset(0, 1).Value = CheckBox1.Value
Exit For
End If
Next cell
End Sub
Private Sub ComboBox1_Change()
' get the value from the spreadsheet
' apply it to the checkbox
Dim rows As Range
Set rows = Sheet1.Range("RowIDs")
Dim cell As Range
For Each cell In rows
If cell.Value = ComboBox1.Value Then
CheckBox1.Value = cell.Offset(0, 1).Value '<<< This would be the line that causes the error
Exit For
End If
Next cell
End Sub
Private Sub CommandButton1_Click()
populateCombo
End Sub
Private Sub populateCombo()
Dim rows As Range
Set rows = Sheet1.Range("RowIDs")
ComboBox1.Clear
ComboBox1.Text = "--- Select row to activate ---"
Dim cell As Range
For Each cell In rows
ComboBox1.AddItem cell.Value
Next cell
End Sub
Private Sub Worksheet_Activate()
UserForm1.Label1.Caption = Sheet1.Name
UserForm1.Show
End Sub
回调来允许我设置onConnected并开始操纵播放。
在我的播放器/浏览器活动中：
MediaController我在调试器中添加了断点，似乎执行确实到达了服务，到了private final MediaBrowserCompat.ConnectionCallback mConnectionCallback =
new MediaBrowserCompat.ConnectionCallback() {
@Override
public void onConnected() {
try {
mMediaController =
new MediaControllerCompat(
PlayActivity.this,
mMediaBrowser.getSessionToken()
);
mMediaController.registerCallback(mControllerCallback);
mControllerCallback
.onMetadataChanged(mMediaController.getMetadata());
mControllerCallback
.onPlaybackStateChanged(mMediaController.getPlaybackState());
} catch (RemoteException e) {
throw new RuntimeException(e);
}
mMediaController
.getTransportControls()
.prepareFromUri(
Uri.parse(
getIntent()
.getStringExtra(StreamingService.STREAM_URI)),
getIntent().getExtras());
mMediaController
.getTransportControls().play();
buildTransportControls();
}
@Override
public void onConnectionSuspended() { }
@Override
public void onConnectionFailed() { }
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_play);
setSupportActionBar((Toolbar) findViewById(R.id.toolbar));
Objects.requireNonNull(getSupportActionBar()).setDisplayHomeAsUpEnabled(true);
mMediaBrowser = new MediaBrowserCompat(this,
new ComponentName(this, StreamingService.class),
mConnectionCallback,
null);
}
@Override
public void onStart() {
super.onStart();
mMediaBrowser.connect();
}
方法的末尾，但执行似乎永远不会到达onCreate或{{1我的连接回调的方法。调用onConnected后，选中onConnectionFailed将返回false。
我不确定如何进一步调试，因为问题在连接过程中的某个地方发生，并且据我所知，我的代码符合Android示例指南。是的，我在浏览器服务的connect中呼叫isConnected。
如果我尝试在活动的setSessionToken中设置MediaController，在我调用onCreate之后，我会收到一个异常，说明浏览器未连接，因此无法设置会话令牌。因此，虽然执行进入我的服务的onStart，但连接没有完成。
答案 0 :(得分：3)
我发现了这个错误。我在StreamingService（MediaBrowserServiceCompat）类中重写了以下方法：
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
完全删除方法可以进行连接。