mediaplayer+surfaceview实现视频播放以及全屏窗口切换
一.概述
由于需求，要做一个视频播放demo并且能实现半屏与全屏互相切换的操作。网上看了很多，动不动就第三方框架的，感觉也没太大必要，于是自己试着写了个。
1.1 效果如下:
二.基本思路
1.视频的半屏的播放，用mediaplayer+surfaceview来实现即可。
2.按下全屏键，此时手机屏幕横屏，视频填充全屏播放
3.全屏按返回键，或者后退操作，手机变成竖屏，视频半屏播放
所以，我们要横竖屏切换，activity的生命周期不重走。这是需要配置信息
android:configChanges="orientation|screenSize"
三.具体代码如下
package com.maxence.mediaplayer.demo;
import java.io.IOException;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.pm.ActivityInfo;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnPreparedListener;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
@SuppressLint("NewApi")
public class MainActivity extends Activity implements OnClickListener {
private boolean ISPLAYING=false;
private boolean ISFULLSCREEN = false;
private Button btn_full_screen;
private Button btn_play_video;
private Button btn_video_back;
private ProgressBar pb_progressbar;
private FrameLayout fl_group;
private SurfaceView mSurfaceView;
private MediaPlayer mMediaPlayer;
private String videoUrl="http://183.59.160.61:30001/PLTV/88888905/224/3221227505/index.m3u8";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getActionBar().hide();
initView();
initData();
}
private void initData() {
mMediaPlayer = new MediaPlayer();
mSurfaceView.setKeepScreenOn(true);
mSurfaceView.getHolder().addCallback(mCallback);
mHandler.sendMessageDelayed(mHandler.obtainMessage(100), 3000);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
if(ISFULLSCREEN){ //全屏切换半屏
ISFULLSCREEN = false;
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); // 手动横屏
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
dp2px(MainActivity.this, 200));
fl_group.setLayoutParams(lp);
return true;
}
break;
default:
break;
}
return super.onKeyDown(keyCode, event);
}
/**
* dp2px 动态设置视频的宽高
* @param context
* @param dpValue
* @return
*/
public static int dp2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
/**
* 触摸屏幕 按键出现
*/
public boolean onTouchEvent(android.view.MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
btn_video_back.setVisibility(View.VISIBLE);
btn_play_video.setVisibility(View.VISIBLE);
btn_full_screen.setVisibility(View.VISIBLE);
mHandler.sendEmptyMessageDelayed(100, 3000);
break;
default:
break;
}
return true;
};
SurfaceHolder.Callback mCallback = new SurfaceHolder.Callback(){
@Override
public void surfaceCreated(SurfaceHolder holder) {
if (videoUrl != null || !"".equals(videoUrl)) {
new Thread(){
public void run() {
playVideo();
};
}.start();
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
mMediaPlayer.setDisplay(holder);
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
if (mMediaPlayer != null && mMediaPlayer.isPlaying()) {
mMediaPlayer.stop();
pb_progressbar.setVisibility(View.VISIBLE);
}
}
};
private void initView() {
btn_full_screen = (Button) findViewById(R.id.btn_full_video);
btn_play_video = (Button) findViewById(R.id.btn_play_video);
btn_video_back = (Button) findViewById(R.id.btn_video_back);
pb_progressbar = (ProgressBar) findViewById(R.id.pb_progressbar);
fl_group = (FrameLayout) findViewById(R.id.fl_group);
mSurfaceView = (SurfaceView) findViewById(R.id.sv_surfaceview_);
btn_full_screen.setOnClickListener(this);
btn_play_video.setOnClickListener(this);
btn_video_back.setOnClickListener(this);
}
protected void playVideo() {
try {
mMediaPlayer.reset(); // 重置
mMediaPlayer.setDataSource(videoUrl);
// 视频地址
mMediaPlayer.setDisplay(mSurfaceView.getHolder()); // holder
mMediaPlayer.setOnPreparedListener(new PreparedListener()); //
mMediaPlayer.prepare();
}catch (IOException e) {
Log.e("918", e.toString());
}
}
Handler mHandler=new Handler(){
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case 100:
btn_full_screen.setVisibility(View.GONE);
btn_play_video.setVisibility(View.GONE);
btn_video_back.setVisibility(View.GONE);
break;
default:
break;
}
};
};
class PreparedListener implements OnPreparedListener {
int postSize;
@Override
public void onPrepared(MediaPlayer mp) {
Log.e("onPrepared", "----onPrepared");
pb_progressbar.setVisibility(View.GONE); // 取消dialog
btn_play_video.setBackgroundResource(R.drawable.icon_topause);
if (mMediaPlayer != null) {
ISPLAYING=true;
mMediaPlayer.start(); // 播放
mHandler.sendMessageDelayed(mHandler.obtainMessage(100), 3000);
} else {
return;
}
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_full_video:
if (ISFULLSCREEN) { // 全屏转半屏
ISFULLSCREEN = false;
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); // 手动横屏
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
dp2px(MainActivity.this, 200));
fl_group.setLayoutParams(lp);
} else { // 非全屏切换全屏
ISFULLSCREEN = true;
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); // 手动横屏
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.MATCH_PARENT);
fl_group.setLayoutParams(lp);
}
break;
case R.id.btn_video_back:
if (ISFULLSCREEN) { // 全屏转半屏
ISFULLSCREEN = false;
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); // 手动横屏
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
dp2px(MainActivity.this, 200));
fl_group.setLayoutParams(lp);
}
break;
case R.id.btn_play_video:
if(ISPLAYING&&mMediaPlayer!=null){ //视频的播放与暂停
mMediaPlayer.pause();
ISPLAYING=false;
btn_play_video.setBackground(getResources().getDrawable(R.drawable.icon_play));
}else{
btn_play_video.setBackground(getResources().getDrawable(R.drawable.icon_topause));
mMediaPlayer.start();
ISPLAYING=true;
}
break;
default:
break;
}
}
}
这个主页面代码。
横竖屏切换的代码如下：
case R.id.btn_full_video:
if (ISFULLSCREEN) { // 全屏转半屏
ISFULLSCREEN = false;
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); // 手动横屏
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
dp2px(MainActivity.this, 200));
fl_group.setLayoutParams(lp);
} else { // 非全屏切换全屏
ISFULLSCREEN = true;
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); // 手动横屏
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.MATCH_PARENT);
fl_group.setLayoutParams(lp);
}
break;
最后附上xml文件：
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