需求描述
比如广告播放，每个视频15秒，视频之间切换的时候，性能不太好的机器可能会黑屏一段时间，体验不太好，接下来我们就是要解决这个黑屏问题。
解决方案
使用两个surfaceView方式，经过测试不行
使用一个MediaPlayer，在MediaPlayer上面加一层ImageView，每次播放完成后，获取视频的最后一帧的图像给ImageView，视频切换完成，ImageView隐藏，如此往复循环，可行
实践
1.获取视频流图片方式，通过MediaMetadataRetriever，测试发现，部分机器获取的Bitmap可能为空，无法解决，放弃
2.使用TextureView方式，可以获取当前帧的Bitmap，可行，下面贴代码
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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); } } |
相关链接，github地址
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/wenxiang423/article/details/82662113
