如何以Xamarin形式调用媒体播放器 [英] how to invoke media player in Xamarin forms

问题描述

我有一个YouTube视频列表，我想在本机手机的媒体播放器上播放视频.我能够调用网络浏览器和youtube应用，但不能调用android/IOS手机的默认媒体播放器.

i have a list of YouTube videos and i want to play videos on media player of native mobile phone.i am able to invoke web browsers and youtube app but cant invoke default mediaplayer of android/IOS phone.

推荐答案

这是在具有mvvm支持的xamarin应用中实现媒体播放器的全部实现.

This is the whole implementation made to implement media player in my xamarin app which is having mvvm support.

1. 首先，您需要添加插件Media Manager( Nuget 或 GitHub )添加到您的三个项目(便携式，Droid和iOS).为此，您需要右键单击您的项目，然后单击管理NuGet软件包"选项并浏览插件

1. First of all, you need to add the plugin Media Manager ( Nuget or GitHub ) to three of your projects(Portable, Droid and iOS). For that, you need to right-click on your project and click on the Manage NuGet Packages option and browse for plugins

Plugin.MediaManager Plugin.MediaManager.Forms 安装这两个插件.

Plugin.MediaManager Plugin.MediaManager.Forms Install both these plugins.

然后，您需要初始化VideoView，因此将此代码添加到onCreate中Droid的MainActivity文件中.

Then, you need to initialize VideoView, so add this code to your MainActivity file of Droid in onCreate.

受保护的替代无效OnCreate(捆绑包) { TabLayoutResource = Resource.Layout.Tabbar; ToolbarResource = Resource.Layout.Toolbar;

protected override void OnCreate(Bundle bundle) { TabLayoutResource = Resource.Layout.Tabbar; ToolbarResource = Resource.Layout.Toolbar;

    base.OnCreate(bundle);

    VideoViewRenderer.Init();

    global::Xamarin.Forms.Forms.Init(this, bundle);

    FileAccessHelper.CopyDatabaseIfNotExists("BizQuiz");

    LoadApplication(new App());
  }

现在让这样一个视图.

这是我的xaml文件:MediaPlayer.xaml

This is my xaml file: MediaPlayer.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
         xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
         x:Class="Add your class name here"
         xmlns:local="clr-namespace:MediaForms"
         xmlns:forms="clr-
   namespace:Plugin.MediaManager.Forms;assembly=Plugin.MediaManager.Forms"
         BackgroundColor="Aqua">
<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="4*"/>
        <RowDefinition Height="1*"/>
    </Grid.RowDefinitions>
    <forms:VideoView Grid.Row="0" Grid.RowSpan="1" 
    HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand"
                 Source="http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4" 
 AspectMode="AspectFill"/>
    <Grid HorizontalOptions="FillAndExpand" Grid.Row="1" Grid.RowSpan="1" 
 Margin="20">
        <Grid.RowDefinitions>
            <RowDefinition Height="1*"/>
            <RowDefinition Height="6*"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <StackLayout Grid.Row="0" Grid.ColumnSpan="3" 
    Orientation="Vertical">
            <StackLayout Orientation="Horizontal">
                <Label Text="Duration: "></Label>
                <Label x:Name="Duration"/>
            </StackLayout>
            <ProgressBar x:Name="ProgressBar" Grid.ColumnSpan="3" 
    HorizontalOptions="FillAndExpand"></ProgressBar>
        </StackLayout>

        <Button Grid.Row="1" Grid.Column="0" TextColor="White" 
    BackgroundColor="Gray" HeightRequest="50" VerticalOptions="Center" 
    Text="Play" WidthRequest="100" Clicked="PlayClicked"></Button>
        <Button Grid.Row="1" Grid.Column="1" TextColor="White" Text="Pause" 
    BackgroundColor="Gray" HeightRequest="50" VerticalOptions="Center" 
     WidthRequest="100" Clicked="PauseClicked"></Button>
        <Button Grid.Row="1" Grid.Column="2" TextColor="White" Text="Stop" 
    BackgroundColor="Gray" HeightRequest="50" VerticalOptions="Center" 
      WidthRequest="100" Clicked="StopClicked"></Button>
    </Grid>

</Grid>
</ContentPage>`

这是我的xaml.cs文件

And this is my xaml.cs file

MediaPLayer.xaml.cs

MediaPLayer.xaml.cs

public partial class MediaPlayer : ContentPage
  {
     private IPlaybackController PlaybackController => 
   CrossMediaManager.Current.PlaybackController;

    public MediaPlayer()
    {
        InitializeComponent();

        CrossMediaManager.Current.PlayingChanged += (sender, e) =>
        {
            ProgressBar.Progress = e.Progress;
            Duration.Text = "" + e.Duration.TotalSeconds.ToString() + " 
     seconds";
        };
    }

    void PlayClicked(object sender, System.EventArgs e)
    {
        PlaybackController.Play();
    }

    void PauseClicked(object sender, System.EventArgs e)
    {
        PlaybackController.Pause();
    }

    void StopClicked(object sender, System.EventArgs e)
    {
        PlaybackController.Stop();
    }
  }

仅此而已，您可以像这样从URL播放视频.

That's all, You can play the video from URL like this.

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