Android项目实现视频播放器

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context=".MainActivity">
 <ImageView
 android:id="@+id/bt_play"
 android:layout_width="80dp"
 android:layout_height="80dp"
 android:layout_alignParentBottom="true"
 android:layout_centerHorizontal="true"
 android:layout_marginBottom="150dp"
 android:src="@android:drawable/ic_media_play" />
 <VideoView
 android:id="@+id/videoview"
 android:layout_width="match_parent"
 android:layout_height="match_parent" />
</RelativeLayout>

package com.example.videoview;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.MediaController;
import android.widget.VideoView;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity implements
 View.OnClickListener {
 private VideoView videoView;
 private MediaController controller;
 ImageView iv_play;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 videoView = (VideoView) findViewById(R.id.videoview);
 iv_play = (ImageView) findViewById(R.id.bt_play);
 //拼出在资源文件夹下的视频文件路径String字符串
 String url = "android.resource://" + getPackageName() + "/" + R.raw.video;
 //字符串解析成Uri
 Uri uri = Uri.parse(url);
 //设置videoview的播放资源
 videoView.setVideoURI(uri);
 //VideoView绑定控制器
 controller = new MediaController(this);
 videoView.setMediaController(controller);
 iv_play.setOnClickListener(this);
 }
 @Override
 public void onClick(View v) {
 switch (v.getId()) {
  case R.id.bt_play:
  play();
  break;
 }
 }
 // 播放视频
 private void play() {
 if (videoView != null && videoView.isPlaying()) {
  iv_play.setImageResource(android.R.drawable.ic_media_play);
  videoView.stopPlayback();
  return;
 }
 videoView.start();
 iv_play.setImageResource(android.R.drawable.ic_media_pause);
 videoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
  @Override
  public void onCompletion(MediaPlayer mp) {
  iv_play.setImageResource(android.R.drawable.ic_media_play);
  }
 });
 }
}