java.lang.ClassCastException：com.twilio.video.VideoTextureView无法转换为android.widget.VideoView

分类：编程问答

如何解决java.lang.ClassCastException：com.twilio.video.VideoTextureView无法转换为android.widget.VideoView

有人知道如何从Twilio API获得广播链接的信息吗？

我想用VideoTextureView流式传输视频。我尝试使用下面的代码来完成此操作，但是找不到Twilio API的广播链接。

我收到以下错误：

由于：java.lang.ClassCastException： com.twilio.video.VideoTextureView无法转换为 android.widget.VideoView

我的代码：

public class MainActivity extends AppCompatActivity {
    private ImageButton button,button1,button2;
    private GridLayout gridLayout;
    private ImageView circle,dislike,like;
    private VideoView videoView;
    private String videoPath;
    private VideoTextureView videoTextureView;
    private Uri uri;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        button = findViewById(R.id.circle);
        button1 = findViewById(R.id.dislike);
        button2 = findViewById(R.id.like);
       
        circle = findViewById(R.id.imageView);
        dislike = findViewById(R.id.imageView2);
        like = findViewById(R.id.imageView3);

        circle.setVisibility(View.INVISIBLE);
        dislike.setVisibility(View.INVISIBLE);
        like.setVisibility(View.INVISIBLE);

        videoView = findViewById(R.id.video_view_top_right);
        Uri uri = Uri.parse("android.resource://"+getPackageName()+"/"+R.raw.video);
        videoView.setVideoURI(uri);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(MainActivity.this,"Circle",Toast.LENGTH_LONG).show();
            }
        });
        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(MainActivity.this,"Dislike",Toast.LENGTH_LONG).show();
            }
        });
        button2.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View view) {
               Toast.makeText(MainActivity.this,"Like",Toast.LENGTH_LONG).show();
               findViewById(R.id.imageView);
            }
        });
    }
}

布局文件：

<?xml version="1.0" encoding="utf-8"?>

<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <com.twilio.video.VideoTextureView
        android:id="@+id/video_view_top_right"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.0" />

    <pl.droidsonroids.gif.GifImageView
        android:id="@+id/gift"
        android:layout_width="106dp"
        android:layout_height="106dp"
        android:layout_gravity="center"
        android:layout_marginTop="492dp"
        android:layout_marginEnd="168dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="70dp"
        android:layout_height="58dp"
        android:layout_marginStart="61dp"
        android:layout_marginTop="244dp"
        android:layout_marginEnd="40dp"
        app:layout_constraintEnd_toStartOf="@+id/imageView2"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@mipmap/launch1" />

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="70dp"
        android:layout_height="58dp"
        android:layout_marginTop="244dp"
        android:layout_marginEnd="40dp"
        app:layout_constraintEnd_toStartOf="@+id/imageView3"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@mipmap/launch2" />

    <ImageView
        android:id="@+id/imageView3"
        android:layout_width="70dp"
        android:layout_height="58dp"
        android:layout_marginEnd="60dp"
        android:layout_marginBottom="428dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:srcCompat="@mipmap/launch3" />

    <ImageButton
        android:id="@+id/circle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="37dp"
        android:layout_marginBottom="4dp"
        android:background="@mipmap/launch1"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/dislike"
        app:layout_constraintHorizontal_bias="0.574"
        app:layout_constraintStart_toStartOf="parent" />

    <ImageButton
        android:id="@+id/dislike"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@mipmap/launch2"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.499"
        app:layout_constraintStart_toStartOf="parent"></ImageButton>

    <ImageButton
        android:id="@+id/like"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="60dp"
        android:layout_marginBottom="4dp"
        android:background="@mipmap/launch3"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.447"
        app:layout_constraintStart_toEndOf="@+id/dislike"></ImageButton>
    
</androidx.constraintlayout.widget.ConstraintLayout>

收到的错误：

2020-08-10 22:28:03.331 13296-13296/com.bariskarapelit.stajprojesi_1 E/AndroidRuntime: FATAL EXCEPTION: main
        Process: com.bariskarapelit.stajprojesi_1,PID: 13296
        java.lang.RuntimeException: Unable to start activity ComponentInfo{com.bariskarapelit.stajprojesi_1/com.bariskarapelit.stajprojesi_1.MainActivity}: java.lang.ClassCastException: com.twilio.video.VideoTextureView cannot be cast to android.widget.VideoView
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3126)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3269)
            at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
            at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
            at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1960)
            at android.os.Handler.dispatchMessage(Handler.java:106)
            at android.os.Looper.loop(Looper.java:214)
            at android.app.ActivityThread.main(ActivityThread.java:7094)
            at java.lang.reflect.Method.invoke(Native Method)
            at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975)
         Caused by: java.lang.ClassCastException: com.twilio.video.VideoTextureView cannot be cast to android.widget.VideoView
            at com.bariskarapelit.stajprojesi_1.MainActivity.onCreate(MainActivity.java:49)
            at android.app.Activity.performCreate(Activity.java:7340)
            at android.app.Activity.performCreate(Activity.java:7331)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1275)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3106)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3269) 
            at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) 
            at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) 
            at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) 
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1960) 
            at android.os.Handler.dispatchMessage(Handler.java:106) 
            at android.os.Looper.loop(Looper.java:214) 
            at android.app.ActivityThread.main(ActivityThread.java:7094) 
            at java.lang.reflect.Method.invoke(Native Method)

解决方法

在android VideoView中流式传输视频，并使用Twilio的截屏API广播您的视频。 Twilio的VideoTextureView用于显示摄像机视图或屏幕。 请点击下面的链接，

https://www.twilio.com/docs/video/android-screen-capture-v5

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