Android 第四十六章 TextureView

kotlin 复制代码

package com.clzw.demo

import android.graphics.SurfaceTexture
import android.media.AudioManager
import android.media.MediaPlayer
import android.os.Bundle
import android.view.Surface
import android.view.TextureView
import androidx.appcompat.app.AppCompatActivity
import com.clzw.demo.databinding.ActivityMainBinding

/**
 * <uses-permission android:name="android.permission.INTERNET" />
 * TextureView 可用于显示内容流，例如来自相机预览、视频或 OpenGL 场景的内容流。内容流可以来自应用程序的进程以及远程进程。
 * TextureView 只能在硬件加速窗口中使用。当在软件中渲染时，TextureView 将不会绘制任何内容。
 */

class MainActivity : AppCompatActivity() {
    lateinit var binding: ActivityMainBinding

    lateinit var mMediaPlayer : MediaPlayer

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding= ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)

        initData()
        initClick()

    }

    private fun initData() {
        mMediaPlayer=MediaPlayer()
    }

    private fun initClick() {
        binding.textureView.surfaceTextureListener= object :TextureView.SurfaceTextureListener{
            override fun onSurfaceTextureAvailable(surface: SurfaceTexture, width: Int, height: Int) {
                //当TextureView的SurfaceTexture准备好使用时调用

                mMediaPlayer.setSurface(Surface(surface))
                mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC)
                mMediaPlayer.setDataSource("xx")//视频地址
                mMediaPlayer.prepareAsync();
                mMediaPlayer.setOnPreparedListener { mMediaPlayer.start() }
            }

            override fun onSurfaceTextureSizeChanged(surface: SurfaceTexture, width: Int, height: Int) {
                // 当SurfaceTexture的缓冲区大小更改时调用，
            }

            override fun onSurfaceTextureDestroyed(surface: SurfaceTexture): Boolean {
                //当 SurfaceTexture 即将被销毁时调用
                mMediaPlayer.stop()
                mMediaPlayer.release()
                return true
            }

            override fun onSurfaceTextureUpdated(surface: SurfaceTexture) {
                //当指定的 SurfaceTexture 有新的视频帧时调用
            }

        }
    }
}

xml 复制代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:gravity="center"
    android:orientation="vertical"
    tools:context=".MainActivity">


    <TextureView
        android:id="@+id/textureView"
        android:layout_width="800dp"
        android:layout_height="500dp"/>

</LinearLayout>