Android使用MediaPlayer和TextureView實(shí)現(xiàn)視頻無縫切換

更新時(shí)間：2019年10月09日 10:13:11 作者：Winson_Zhou

這篇文章主要為大家詳細(xì)介紹了Android使用MediaPlayer和TextureView實(shí)現(xiàn)視頻無縫切換，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

需求描述

比如廣告播放，每個(gè)視頻15秒，視頻之間切換的時(shí)候，性能不太好的機(jī)器可能會(huì)黑屏一段時(shí)間，體驗(yàn)不太好，接下來我們就是要解決這個(gè)黑屏問題。

解決方案

使用兩個(gè)surfaceView方式，經(jīng)過測(cè)試不行
使用一個(gè)MediaPlayer，在MediaPlayer上面加一層ImageView，每次播放完成后，獲取視頻的最后一幀的圖像給ImageView，視頻切換完成，ImageView隱藏，如此往復(fù)循環(huán)，可行

實(shí)踐

1.獲取視頻流圖片方式，通過MediaMetadataRetriever，測(cè)試發(fā)現(xiàn)，部分機(jī)器獲取的Bitmap可能為空，無法解決，放棄

2.使用TextureView方式，可以獲取當(dāng)前幀的Bitmap，可行，下面貼代碼

package com.winson.blog.video;
 
import android.graphics.Bitmap;
import android.graphics.SurfaceTexture;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Surface;
import android.view.TextureView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.ImageView;
 
import java.io.IOException;
 
public class VideoFragment extends Fragment {
 
 public static final String TAG = VideoFragment.class.getSimpleName();
 
 String TEST_PATH = Environment.getExternalStorageDirectory().getAbsolutePath() + "/testmp4.mp4";
 int mIndex = 0;
 String path1 = TEST_PATH;
 String[] paths = new String[]{TEST_PATH, TEST_PATH, TEST_PATH, TEST_PATH, TEST_PATH, TEST_PATH};
 
 boolean destory;
 Handler mHandler;
 Runnable mPlayRun;
 FrameLayout content;
 TextureView textureView;
 ImageView frameImage;
 MediaPlayer mediaPlayer;
 Bitmap lastFrameBitmap;
 
 public void updateResources(String[] paths) {
 this.paths = paths;
 if(mHandler != null && mPlayRun!= null){
  mHandler.post(mPlayRun);
 }
 }
 
 @Override
 public void onCreate(@Nullable Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 
 mHandler = new Handler();
 mediaPlayer = new MediaPlayer();
 mPlayRun = new Runnable() {
 
  @Override
  public void run() {
 
  if (mediaPlayer == null || destory) {
   return;
 
  }
  mediaPlayer.pause();
  mediaPlayer.reset();
 
  try {
   String path = paths[mIndex % paths.length];
   mIndex++;
 
   mediaPlayer.setDataSource(getActivity(), Uri.parse(path));
   mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
 
   @Override
   public void onPrepared(MediaPlayer arg0) {
    mediaPlayer.start();
    frameImage.setVisibility(View.GONE);
   }
   });
   mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
   @Override
   public void onCompletion(MediaPlayer mp) {
    frameImage.setVisibility(View.VISIBLE);
    Bitmap currentFrameBitmap = textureView.getBitmap();
    frameImage.setImageBitmap(currentFrameBitmap);
    if (lastFrameBitmap != null) {
    lastFrameBitmap.recycle();
    }
    lastFrameBitmap = currentFrameBitmap;
 
    mHandler.post(mPlayRun);
   }
   });
   mediaPlayer.prepareAsync();
 
  } catch (Exception e) {
   e.printStackTrace();
  }
  }
 
 };
 }
 
 
 public void release() {
 mHandler.removeCallbacks(mPlayRun);
 if (mediaPlayer != null) {
  mediaPlayer.pause();
  mediaPlayer.release();
 }
 }
 
 public Bitmap getBitmap() {
 return textureView == null ? null : textureView.getBitmap();
 }
 
 @Override
 public void onDestroy() {
 super.onDestroy();
 release();
 }
 
 @Nullable
 @Override
 public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
 content = new FrameLayout(getActivity());
 
 FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);
 lp.gravity = Gravity.LEFT | Gravity.TOP;
 
 textureView = new TextureView(getActivity());
 textureView.setLayoutParams(lp);
 content.addView(textureView);
 
 frameImage = new ImageView(getActivity());
 frameImage.setScaleType(ImageView.ScaleType.FIT_XY);
 frameImage.setLayoutParams(lp);
 content.addView(frameImage);
 
 textureView.setSurfaceTextureListener(new TextureView.SurfaceTextureListener() {
  @Override
  public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
  Surface s = new Surface(surface);
  mediaPlayer.setSurface(s);
 
  }
 
  @Override
  public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
  }
 
  @Override
  public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
  return false;
  }
 
  @Override
  public void onSurfaceTextureUpdated(SurfaceTexture surface) {
  }
 });
 
 return content;
 }
 
 @Override
 public void onActivityCreated(@Nullable Bundle savedInstanceState) {
 super.onActivityCreated(savedInstanceState);
 
 testPlay();
 }
 
 public void testPlay() {
// mediaPlayer.pause();
// mediaPlayer.reset();
//
// try {
//  mediaPlayer.setDataSource(getActivity(), Uri.parse(TEST_PATH));
//  mediaPlayer.prepare();
//  mediaPlayer.start();
// } catch (IOException e) {
//  e.printStackTrace();
// }
 
 mHandler.post(mPlayRun);
 }
 
 
}

相關(guān)鏈接，github地址

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

您可能感興趣的文章: