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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