在不使用 com.google.android.exoplayer2.ui.PlayerView 的情况下保持 Aspect Ratio Exoplayer

Answer 1

没注意到最后的评论，我看到你的设置是错误的，而不是这个

SimpleExoPlayer player = new SimpleExoPlayer.Builder(getApplicationContext()).build();
player.setRepeatMode(Player.REPEAT_MODE_ALL);
player.setMediaSource(mediaSource);
player.prepare();
player.play();
VideoProcessingGLSurfaceView videoProcessingGLSurfaceView =
    Assertions.checkNotNull(this.videoProcessingGLSurfaceView);
videoProcessingGLSurfaceView.setVideoComponent(
    Assertions.checkNotNull(player.getVideoComponent()));
Assertions.checkNotNull(playerView).setPlayer(player);
player.addAnalyticsListener(new EventLogger(/* trackSelector= */ null));
this.player = player;

尝试这个：

this.player = new SimpleExoPlayer.Builder(getApplicationContext()).build();
player.setRepeatMode(Player.REPEAT_MODE_ALL);
player.setMediaSource(mediaSource);
Assertions.checkNotNull(playerView).setPlayer(player); // this needs to happen once during your setup 
player.playWhenReady = true // this is recommended by official docs instead of player.play() always call it before prepare
player.prepare();
VideoProcessingGLSurfaceView videoProcessingGLSurfaceView =
    Assertions.checkNotNull(this.videoProcessingGLSurfaceView);
videoProcessingGLSurfaceView.setVideoComponent(
    Assertions.checkNotNull(player.getVideoComponent()));
player.addAnalyticsListener(new EventLogger(/* trackSelector= */ null));

Answer 2

如果您使用的是 xml，则可以将播放器视图添加到约束布局

然后添加属性

app:layout_constraintDimensionRatio="16:9"

在 playerview 的 xml 声明中，例如我使用 styledplayerview

<com.google.android.exoplayer2.ui.StyledPlayerView
    android:id="@+id/home_exoplayer_view"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    app:layout_constraintDimensionRatio="16:9"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    />

编辑：此属性不依赖于 Exoplayer 的版本。

出于您的目的，无论屏幕尺寸或视频尺寸如何，您都有两个选项可以保持纵横比不变。

1）要么将框架布局更改为约束布局，然后在播放器视图中使用“app:layout_constraintDimensionRatio”属性。

用于替换框架布局的示例代码

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2020 The Android Open Source Project
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
          http://www.apache.org/licenses/LICENSE-2.0
     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->
<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"
  android:keepScreenOn="true">

  <com.google.android.exoplayer2.ui.PlayerView
    android:id="@+id/player_view"
    app:layout_constraintDimensionRatio="16:9"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:surface_type="none"/>

</androidx.constraintlayout.widget.ConstraintLayout>

另一种解决方法是在框架布局内嵌套约束布局。

像这样，

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2020 The Android Open Source Project
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
          http://www.apache.org/licenses/LICENSE-2.0
     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->
<FrameLayout
  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"
  android:keepScreenOn="true">

    <androidx.constraintlayout.widget.ConstraintLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent">
    
      <com.google.android.exoplayer2.ui.PlayerView
        android:id="@+id/player_view"
        app:layout_constraintDimensionRatio="16:9"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:surface_type="none"/>
    
    </androidx.constraintlayout.widget.ConstraintLayout>

</FrameLayout>