Android开发 MediaPlayer播放本地视频完善的demo(只是代码记录)
作者：互联网
xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/root_layout"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:keepScreenOn="true"
android:background="@color/colorBlack1"
tools:context=".work.share.VideoPlayActivity">
<SurfaceView
android:id="@+id/video_play_surfaceview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintVertical_bias="0.5"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"/>
<ImageView
android:id="@+id/start_and_stop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@mipmap/ic_sex_male"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@id/vedio_current_time"
app:layout_constraintBottom_toBottomOf="parent" />
<TextView
android:id="@+id/vedio_current_time"
android:text="当前时间"
android:textColor="@color/fontWhite"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
app:layout_constraintTop_toTopOf="@id/start_and_stop"
app:layout_constraintBottom_toBottomOf="@id/start_and_stop"
app:layout_constraintLeft_toRightOf="@id/start_and_stop"
app:layout_constraintRight_toLeftOf="@id/vedio_seek"/>
<SeekBar
android:id="@+id/vedio_seek"
android:layout_width="0dp"
android:layout_height="0dp"
android:maxHeight="3dp"
android:minHeight="3dp"
android:progressDrawable="@drawable/vedio_seekbar_bg"
app:layout_constraintTop_toTopOf="@id/start_and_stop"
app:layout_constraintBottom_toBottomOf="@id/start_and_stop"
app:layout_constraintLeft_toRightOf="@id/vedio_current_time"
app:layout_constraintRight_toRightOf="@id/vedio_total_time"/>
<TextView
android:id="@+id/vedio_total_time"
android:textColor="@color/fontWhite"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="10dp"
app:layout_constraintTop_toTopOf="@id/start_and_stop"
app:layout_constraintBottom_toBottomOf="@id/start_and_stop"
app:layout_constraintLeft_toRightOf="@id/vedio_seek"
app:layout_constraintRight_toRightOf="parent"/>
<ImageView
android:id="@+id/back"
android:layout_width="wrap_content"
android:layout_height="@dimen/title_height"
android:paddingLeft="20dp"
android:src="@mipmap/ic_back_white"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintLeft_toLeftOf="parent"/>
<TextView
android:id="@+id/vedio_settings"
android:textColor="@color/fontWhite"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:visibility="gone"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintRight_toRightOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
代码
/**
*@content:视频播放activity
*@time:2019-6-13
*/
public class VideoPlayActivity extends BaseActivity implements View.OnClickListener {
private static final String TAG = VideoPlayActivity.class.getSimpleName();
private ConstraintLayout mRootLayout;
private SurfaceView mVideoPlaySurfaceview;
private ImageView mStartAndStop, mBack;
private MediaPlayer mMediaPlayer;
private SeekBar mVedioSeek;
private TextView mVedioCurrentTimeTextView, mVedioTotalTimeTextView, mVedioSettings;
private String mPath;
private boolean isInitFinish = false;
private SurfaceHolder mSurfaceHolder;
private Handler mHandler;
private final int GET_VIDEO_PLAY_TIME_KEY = 0x01;
private final int GONS_VIEW_KEY = 0x02;
private static int mCurrentPlayTime = 0; //因为切换横竖屏后,activity其实是重新创建的,所以需要用静态变量保存当前播放时间
private int mTotalPlayTime = 0;
SimpleDateFormat mTimeFormat = new SimpleDateFormat("mm:ss");
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
initVedioSeekListener();
initHandler();
mHandler.sendEmptyMessageDelayed(GONS_VIEW_KEY,8*1000);
File file = new File(getExternalCacheDir(), "demo.mp4");
mPath = file.getAbsolutePath();
initMediaPalyer();
initSurfaceviewStateListener();
}
@Override
protected void onPause() {
super.onPause();
pausePlay();
}
@Override
protected void onResume() {
super.onResume();
startPlay();
}
@Override
public int getLayout() {
return R.layout.activity_video_play;
}
@Override
public void initView() {
mRootLayout = findViewById(R.id.root_layout);
mVideoPlaySurfaceview = findViewById(R.id.video_play_surfaceview);
mStartAndStop = findViewById(R.id.start_and_stop);
mVedioCurrentTimeTextView = findViewById(R.id.vedio_current_time);
mVedioTotalTimeTextView = findViewById(R.id.vedio_total_time);
mVedioSeek = findViewById(R.id.vedio_seek);
mVedioSettings = findViewById(R.id.vedio_settings);
mBack = findViewById(R.id.back);
mStartAndStop.setOnClickListener(this);
mBack.setOnClickListener(this);
mRootLayout.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.start_and_stop:
if (mMediaPlayer.isPlaying()) {
pausePlay();
mStartAndStop.setImageResource(R.mipmap.ic_sex_male);
} else {
startPlay();
mStartAndStop.setImageResource(R.mipmap.ic_sex_female);
}
break;
case R.id.back:
finish();
break;
case R.id.root_layout:
mStartAndStop.setVisibility(View.VISIBLE);
mVedioSettings.setVisibility(View.VISIBLE);
mVedioTotalTimeTextView.setVisibility(View.VISIBLE);
mVedioCurrentTimeTextView.setVisibility(View.VISIBLE);
mBack.setVisibility(View.VISIBLE);
mVedioSeek.setVisibility(View.VISIBLE);
mHandler.sendEmptyMessageDelayed(GONS_VIEW_KEY,8*1000);
break;
default:
break;
}
}
private void initHandler(){
mHandler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what){
case GET_VIDEO_PLAY_TIME_KEY:
if (mMediaPlayer != null){
mCurrentPlayTime = mMediaPlayer.getCurrentPosition();
L.e("每秒mCurrentPlayTime="+mCurrentPlayTime);
mVedioSeek.setProgress(mCurrentPlayTime/1000);
mVedioCurrentTimeTextView.setText(mTimeFormat.format(mCurrentPlayTime));
}
mHandler.sendEmptyMessageDelayed(GET_VIDEO_PLAY_TIME_KEY,1000);
break;
case GONS_VIEW_KEY:
mStartAndStop.setVisibility(View.GONE);
mVedioSettings.setVisibility(View.GONE);
mVedioTotalTimeTextView.setVisibility(View.GONE);
mVedioCurrentTimeTextView.setVisibility(View.GONE);
mBack.setVisibility(View.GONE);
mVedioSeek.setVisibility(View.GONE);
break;
default:
break;
}
}
};
}
private void initVedioSeekListener(){
mVedioSeek.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
mMediaPlayer.seekTo(seekBar.getProgress()*1000);
mCurrentPlayTime = mMediaPlayer.getCurrentPosition();
mVedioCurrentTimeTextView.setText(mTimeFormat.format(mCurrentPlayTime));
}
});
}
private void initSurfaceviewStateListener() {
mSurfaceHolder = mVideoPlaySurfaceview.getHolder();
mSurfaceHolder.addCallback(new SurfaceHolder.Callback() {
@Override
public void surfaceCreated(SurfaceHolder holder) {
mMediaPlayer.setDisplay(holder);//给mMediaPlayer添加预览的SurfaceHolder
setPlayVideo(mPath);//添加播放视频的路径
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Log.e(TAG, "surfaceChanged触发: width=" + width + "height" + height);
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
});
}
private void initMediaPalyer() {
mMediaPlayer = new MediaPlayer();
}
private void setPlayVideo(String path) {
try {
mMediaPlayer.setDataSource(path);//
mMediaPlayer.setVideoScalingMode(MediaPlayer.VIDEO_SCALING_MODE_SCALE_TO_FIT);//缩放模式
mMediaPlayer.setLooping(true);//设置循环播放
mMediaPlayer.prepareAsync();//异步准备
// mMediaPlayer.prepare();//同步准备,因为是同步在一些性能较差的设备上会导致UI卡顿
mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { //准备完成回调
@Override
public void onPrepared(MediaPlayer mp) {
isInitFinish = true;
mMediaPlayer.start();
mHandler.sendEmptyMessage(GET_VIDEO_PLAY_TIME_KEY);
mTotalPlayTime = mMediaPlayer.getDuration();
if (mTotalPlayTime == -1){
Toast.makeText(VideoPlayActivity.this, "视频文件时间异常", Toast.LENGTH_SHORT).show();
finish();
}
mVedioSeek.setMax(mTotalPlayTime/1000);
mVedioTotalTimeTextView.setText(formatTime(mTotalPlayTime));
}
});
mMediaPlayer.setOnVideoSizeChangedListener(new MediaPlayer.OnVideoSizeChangedListener() { //尺寸变化回调
@Override
public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
changeVideoSize();
L.e("mCurrentPlayTime="+mCurrentPlayTime);
seekTo(mCurrentPlayTime);
}
});
mMediaPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() {
@Override
public boolean one rror(MediaPlayer mp, int what, int extra) {
L.e("视频播放错误,错误原因what="+what+"extra="+extra);
return false;
}
});
mMediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
}
});
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 修改视频的大小,以用来适配屏幕
*/
public void changeVideoSize() {
int videoWidth = mMediaPlayer.getVideoWidth();
int videoHeight = mMediaPlayer.getVideoHeight();
int deviceWidth = getResources().getDisplayMetrics().widthPixels;
int deviceHeight = getResources().getDisplayMetrics().heightPixels;
Log.e(TAG, "changeVideoSize: deviceHeight="+deviceHeight+"deviceWidth="+deviceWidth);
float devicePercent = 0;
//下面进行求屏幕比例,因为横竖屏会改变屏幕宽度值,所以为了保持更小的值除更大的值.
if (getResources().getConfiguration().orientation == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT) { //竖屏
devicePercent = (float) deviceWidth / (float) deviceHeight; //竖屏状态下宽度小与高度,求比
}else { //横屏
devicePercent = (float) deviceHeight / (float) deviceWidth; //横屏状态下高度小与宽度,求比
}
if (videoWidth > videoHeight){
if (getResources().getConfiguration().orientation == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT){
videoWidth = deviceWidth;
videoHeight = (int)(videoHeight/devicePercent);
}else {
videoWidth = deviceWidth;
videoHeight = (int)(deviceWidth*devicePercent);
}
}else {
if (getResources().getConfiguration().orientation == ActivityInfo.SCREEN_ORIENTATION_PORTRAIT) {//竖屏
videoHeight = deviceHeight;
float videoPercent = (float) videoWidth / (float) videoHeight;
float differenceValue = Math.abs(videoPercent - devicePercent);
if (differenceValue < 0.3){
videoWidth = deviceWidth;
}else {
videoWidth = (int)(videoWidth/devicePercent);
}
}else { //横屏
videoHeight = deviceHeight;
videoWidth = (int)(deviceHeight*devicePercent);
}
}
ConstraintLayout.LayoutParams layoutParams = (ConstraintLayout.LayoutParams) mVideoPlaySurfaceview.getLayoutParams();
layoutParams.width = videoWidth;
layoutParams.height = videoHeight;
layoutParams.verticalBias = 0.5f;
layoutParams.horizontalBias = 0.5f;
mVideoPlaySurfaceview.setLayoutParams(layoutParams);
}
private void startPlay(){
if (!mMediaPlayer.isPlaying()){
mMediaPlayer.start();
}
}
private void stopPlay(){
if (mMediaPlayer.isPlaying()){
mMediaPlayer.stop();
}
}
private void pausePlay(){
if (mMediaPlayer.isPlaying()){
mMediaPlayer.pause();
}
}
private void seekTo(int time){
mMediaPlayer.seekTo(time);
}
private String formatTime(long time){
return mTimeFormat.format(time);
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mMediaPlayer != null){
if (mMediaPlayer.isPlaying()){
mMediaPlayer.stop();
}
mMediaPlayer.release();
mMediaPlayer = null;
}
}
}
标签：mMediaPlayer,MediaPlayer,demo,void,private,int,Override,Android,public 来源： https://www.cnblogs.com/guanxinjing/p/11024195.html