MediaPlayer播放MP3音频
2017-02-04 本文已影响0人
V1tas
Android多媒体播放有许多开源的，大多底层都是FFmPeg，那玩意对于我这种新手而言完全是一窍不通啊（有能力的可以看看bilibili，vitamio等等。。）。。所以还是用安卓原生的搞一搞吧，尽管会有很多问题，但是慢慢改进就好~~。
一、布局文件
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="@+id/player_frame"
android:layout_width="match_parent"
android:layout_height="250dp"
android:background="@drawable/timg">
<RelativeLayout
android:id="@+id/player_title"
android:layout_width="match_parent"
android:layout_height="30dp"
android:background="#ABABAB"
android:visibility="gone">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="8dp"
android:text="标题" />
</RelativeLayout>
<ImageView
android:id="@+id/player_img2"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_gravity="center"
android:src="@drawable/simple_player_center_play" />
<TextView
android:id="@+id/player_warn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="试听已结束"
android:textColor="#b00"
android:textSize="20sp"
android:visibility="gone" />
<RelativeLayout
android:id="@+id/player_control"
android:layout_width="match_parent"
android:layout_height="30dp"
android:layout_gravity="bottom"
android:background="#ABABAB"
android:visibility="gone">
<Button
android:id="@+id/player_button"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginLeft="10dp"
android:background="@drawable/simple_player_center_play" />
<TextView
android:id="@+id/player_right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="8dp"
android:textColor="#b00"
android:textSize="14sp" />
<TextView
android:id="@+id/player_left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toLeftOf="@id/player_right"
android:textColor="#fdd"
android:textSize="14sp" />
<SeekBar
android:id="@+id/player_seek"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toLeftOf="@id/player_left"
android:layout_toRightOf="@id/player_button" />
</RelativeLayout>
</FrameLayout>
</RelativeLayout>
大致布局
虽然丑 能看就行。。。
二、主要代码
- 安卓要想播放mp3无非就是使用mediaplayer。
public class MainActivity extends AppCompatActivity {
//播放状态 暂定或正在播放
private boolean isPlay = false;
//播放按钮 屏幕下方控制栏中
private Button mPlayBtn;
//播放进度 屏幕下方控制栏中
private SeekBar mPlaySeekBar;
//点击事件
private MyOnClickListener myOnClickListener = new MyOnClickListener();
//MediaPlayer
private MediaPlayer mMediaPlayer;
//mp3链接 修改成可以播放的就行
private String mP3Url = "随便找一个可以播放的mp3";
private Uri uri = null;
//定时器 由于功能中有付费播放功能，需要定时器来判断
private Timer mTimer = null;
private TimerTask mTimerTask = null;
//互斥变量，防止定时器与SeekBar拖动时进度冲突
private boolean isChanging = false;
//当前播放时间与总时间
private TextView mNowText, mTotalText;
//下方控制栏
private RelativeLayout mControlLayout;
//上方标题栏 显示mp3标题
private RelativeLayout mTitleLayout;
//试看结束提示
private TextView mWarnText;
//刚开始显示播放按钮 屏幕中间的播放按钮
private ImageView mPlayImg;
//整个屏幕
private FrameLayout mFrame;
//控制栏与标题栏是否显示 默认不显示
private boolean isShow = false;
//试看时间 三分钟
private static int TRY_TIME = 3 * 60 * 1000;
//Handler用来控制时间与播放
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case 0:
//如果大于试看时间 停止播放，控制栏与标题栏隐藏，屏幕不让点击（防止弹出控制栏与标题栏）提示试看结束。
if (mMediaPlayer.getCurrentPosition() >= TRY_TIME) {
if (mMediaPlayer != null && mMediaPlayer.isPlaying()) {
mMediaPlayer.stop();
mFrame.setEnabled(false);
isShow = false;
mControlLayout.setVisibility(View.GONE);
mTitleLayout.setVisibility(View.GONE);
mWarnText.setVisibility(View.VISIBLE);
}
}
//设置当前播放进度
mNowText.setText(generateTime(mMediaPlayer.getCurrentPosition()) + "/");
break;
case 1:
//当用户点击屏幕时 标题栏与控制栏显示，并在无操作的三秒后消失。
mControlLayout.setVisibility(View.GONE);
mTitleLayout.setVisibility(View.GONE);
isShow = false;
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mMediaPlayer = new MediaPlayer();
mPlayBtn = (Button) findViewById(R.id.player_button);
mPlayBtn.setOnClickListener(myOnClickListener);
mPlaySeekBar = (SeekBar) findViewById(R.id.player_seek);
mPlaySeekBar.setOnSeekBarChangeListener(new MySeekbar());
mNowText = (TextView) findViewById(R.id.player_left);
mTotalText = (TextView) findViewById(R.id.player_right);
mWarnText = (TextView) findViewById(R.id.player_warn);
mControlLayout = (RelativeLayout) findViewById(R.id.player_control);
mTitleLayout = (RelativeLayout) findViewById(R.id.player_title);
mPlayImg = (ImageView) findViewById(R.id.player_img2);
mPlayImg.setOnClickListener(myOnClickListener);
//点击屏幕 显示底部
mFrame = (FrameLayout) findViewById(R.id.player_frame);
mFrame.setOnClickListener(myOnClickListener);
mPlayImg.setEnabled(false);
uri = Uri.parse(mP3Url);
//准备播放
play(uri);
//播放完成事件
mMediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mediaPlayer) {
//进度归零
mediaPlayer.seekTo(0);
//进度条归零
mPlaySeekBar.setProgress(0);
//控制栏中的播放按钮显示暂停状态
mPlayBtn.setBackground(getResources().getDrawable(R.drawable.simple_player_center_play));
isPlay = false;
//重置并准备重新播放
mediaPlayer.reset();
play(uri);
}
});
//异步准备（准备完成），准备到准备完成期间可以显示进度条之类的东西。
mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mediaPlayer) {
mPlaySeekBar.setProgress(0);
mPlayImg.setEnabled(true);
mNowText.setText("00:00/");
mTotalText.setText(generateTime(mMediaPlayer.getDuration() + 1000));
mPlaySeekBar.setMax(mMediaPlayer.getDuration() + 1000);//设置进度条
}
});
}
public void play(Uri uri) {
try {
mMediaPlayer.setDataSource(MainActivity.this, uri);
//采用异步准备，使用prepare方法时，用户进入该界面需要等待几秒，如同死机一般，，，
mMediaPlayer.prepareAsync();
} catch (IOException e) {
e.printStackTrace();
}
}
//进度条的进度变化事件
class MySeekbar implements SeekBar.OnSeekBarChangeListener {
//当进度条变化时触发
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
}
//开始拖拽进度条
public void onStartTrackingTouch(SeekBar seekBar) {
isChanging = true;
}
//停止拖拽进度条
public void onStopTrackingTouch(SeekBar seekBar) {
mMediaPlayer.seekTo(mPlaySeekBar.getProgress());
mNowText.setText(generateTime(mMediaPlayer.getCurrentPosition()) + "/");
isChanging = false;
if (mMediaPlayer.getCurrentPosition() >= TRY_TIME) {
//大于试看时间 停止播放
if (mMediaPlayer != null && mMediaPlayer.isPlaying()) {
mMediaPlayer.stop();
mFrame.setEnabled(false);
isShow = false;
mControlLayout.setVisibility(View.GONE);
mTitleLayout.setVisibility(View.GONE);
mWarnText.setVisibility(View.VISIBLE);
}
} else {
mWarnText.setVisibility(View.GONE);
}
}
}
@Override
protected void onPause() {
super.onPause();
Log.d("tag", "暂停");
}
@Override
protected void onStop() {
super.onStop();
Log.d("tag", "停止");
}
class MyOnClickListener implements View.OnClickListener {
@Override
public void onClick(View view) {
switch (view.getId()) {
//当点击屏幕中间的播放按钮时
case R.id.player_button:
if (isPlay) {
//如果当前正在播放 停止播放 更改控制栏播放状态
mPlayImg.setVisibility(View.VISIBLE);
if (mMediaPlayer != null && mMediaPlayer.isPlaying()) {
mMediaPlayer.pause();
mPlayBtn.setBackground(getResources().getDrawable(R.drawable.simple_player_center_play));
}
} else {
//如果当前停止播放 继续播放 更改控制栏状态
if (mMediaPlayer != null) {
mPlayImg.setVisibility(View.GONE);
mPlayBtn.setBackground(getResources().getDrawable(R.drawable.simple_player_center_pause));
mMediaPlayer.start();
//定时器 更新进度
if (mTimer == null) {
mTimer = new Timer();
mTimerTask = new TimerTask() {
@Override
public void run() {
if (isChanging == true) {
return;
}
if (isPlay) {
mHandler.sendEmptyMessage(0);
mPlaySeekBar.setProgress(mMediaPlayer.getCurrentPosition());
}
}
};
mTimer.schedule(mTimerTask, 0, 1000);
}
}
}
isPlay = !isPlay;
break;
case R.id.player_img2:
if (mMediaPlayer != null) {
mPlayBtn.setBackground(getResources().getDrawable(R.drawable.simple_player_center_pause));
mMediaPlayer.start();
if (mTimer == null) {
mTimer = new Timer();
mTimerTask = new TimerTask() {
@Override
public void run() {
if (isChanging == true) {
return;
}
if (isPlay) {
mHandler.sendEmptyMessage(0);
mPlaySeekBar.setProgress(mMediaPlayer.getCurrentPosition());
}
}
};
mTimer.schedule(mTimerTask, 0, 1000);
}
isPlay = true;
mPlayImg.setVisibility(View.GONE);
}
break;
case R.id.player_frame:
//点击屏幕时 控制 控制栏的显示与隐藏
if (!isShow) {
mControlLayout.setVisibility(View.VISIBLE);
mTitleLayout.setVisibility(View.VISIBLE);
mHandler.sendEmptyMessageDelayed(1, 3000);
} else {
mHandler.removeMessages(1);
mControlLayout.setVisibility(View.GONE);
mTitleLayout.setVisibility(View.GONE);
}
isShow = !isShow;
break;
}
}
}
//界面销毁时，释放mediaplayer与定时器
@Override
protected void onDestroy() {
super.onDestroy();
Log.d("tag", "onDestroy");
if (mTimer != null) {
mTimer.cancel();
mTimer = null;
mTimerTask = null;
}
if (mMediaPlayer != null) {
if (mMediaPlayer.isPlaying()) {
mMediaPlayer.stop();
}
mMediaPlayer.release();
}
}
/**
* 格式化显示的时间
*/
private String generateTime(long time) {
int totalSeconds = (int) (time / 1000);
int seconds = totalSeconds % 60;
int minutes = (totalSeconds / 60) % 60;
int hours = totalSeconds / 3600;
return hours > 0 ? String.format("%02d:%02d:%02d", hours, minutes,
seconds) : String.format("%02d:%02d", minutes, seconds);
}
}
粗略效果
大致效果就出来了，这个只是粗略版的，可以根据自己的需求进行进一步改进。
视频多了个SurfaceView，大致差不多。
