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

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

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