TextureView.SurfaceTextureListener
时间: 2024-01-13 12:05:41 浏览: 29
TextureView.SurfaceTextureListener是一个接口,用于监听TextureView中SurfaceTexture的创建、大小变化和销毁等事件。它包括以下几个方法:
1. onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height):当SurfaceTexture准备好时调用,可以在此方法中初始化渲染器或启动线程等操作。
2. onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width, int height):当SurfaceTexture的大小发生变化时调用,可以在此方法中根据新的大小重新计算绘制的内容。
3. onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture):当SurfaceTexture即将被销毁时调用,可以在此方法中释放资源或停止线程等操作。
4. onSurfaceTextureUpdated(SurfaceTexture surfaceTexture):当SurfaceTexture中的图像数据更新时调用,可以在此方法中更新纹理等操作。
实现TextureView.SurfaceTextureListener接口可以让开发者在TextureView中监听SurfaceTexture的各种事件,从而更好地控制渲染过程。
相关问题
textureview 全屏
要将 TextureView 全屏,可以按照以下步骤进行操作:
1. 将 TextureView 添加到布局文件中,并设置其宽高。
```
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextureView
android:id="@+id/texture_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
```
2. 在 Activity 的 onCreate 方法中获取 TextureView,并设置其监听器。
```
private TextureView textureView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textureView = findViewById(R.id.texture_view);
textureView.setSurfaceTextureListener(new TextureView.SurfaceTextureListener() {
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
// TextureView 可用时,将其设置为全屏
textureView.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width, int height) {
// TextureView 大小变化时,重新设置布局参数
textureView.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
return true;
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
}
});
}
```
在 TextureView 的监听器中,通过设置布局参数,将 TextureView 设置为全屏。当 TextureView 的大小发生变化时,也需要重新设置布局参数。
android开发TextureView
Android中的TextureView是一个可用于显示视频和其他实时内容的视图组件。与SurfaceView不同,TextureView可以在UI线程中使用,因此可以更轻松地与其他UI元素进行交互。以下是使用TextureView的步骤:
1.在XML布局文件中添加TextureView组件:
```xml
<TextureView
android:id="@+id/texture_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
```
2.在Java代码中获取TextureView实例并设置SurfaceTextureListener:
```java
TextureView textureView = findViewById(R.id.texture_view);
textureView.setSurfaceTextureListener(new TextureView.SurfaceTextureListener() {
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
// SurfaceTexture可用时执行相关操作
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width, int height) {
// SurfaceTexture尺寸变化时执行相关操作
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
// SurfaceTexture销毁时执行相关操作
return true;
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {
// SurfaceTexture更新时执行相关操作
}
});
```
3.在onSurfaceTextureAvailable()方法中获取SurfaceTexture实例并进行相关操作:
```java
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
// SurfaceTexture可用时执行相关操作
Surface surface = new Surface(surfaceTexture);
// 使用surface进行绘制等操作
}
```
4.在onSurfaceTextureDestroyed()方法中释放相关资源:
```java
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {
// SurfaceTexture销毁时执行相关操作
surface.release();
return true;
}
```