智能终端课程设计之安卓音乐播放器
智能终端课程设计之安卓音乐播放器
这里是一个最基本最简单的本地音乐播放器，应付课设基本就OK了。
不要脸的把项目扔上来：https://github.com/Chuyuxuan0v0/AndroidMusic
课设题目要求
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题目九 音乐播放器
一、目的与要求
- 学会如何使用 MediaPlayer 等媒体播放组件。 2. 学会如何进行数据保存。
音乐播放器主要的功能： - 播放列表：在设置菜单，读取 sdcard 指定目录下的所有 mp3 文件，建立播放列表。
- 播放控制：能够对播放进行控制，能够开始/继续播放、暂停播放、停止播放、上一 首、下一首。
- 保存播放记录：能够存储已播放过的历史。
- 扩展功能：（1）增加歌曲库的概念；（2）给歌曲设置类别标签，根据已播放的历 史，在界面上的推荐区域展示推荐歌曲；（3）根据歌名，搜索下载网上的歌曲。
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界面展示
实现方法
1、layout_main文件编写
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/welcomimg1">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_alignParentBottom="true"
android:id="@+id/local_music_bottomlayout">
<ImageView
android:layout_width="match_parent"
android:layout_height="0.5dp"/>
<ImageView
android:layout_width="60dp"
android:layout_height="60dp"
android:src="@drawable/music1"
android:layout_centerVertical="true"
android:background="@mipmap/a1"
android:layout_marginLeft="10dp"
android:id="@+id/local_music_bottom_iv_icon"/>
<TextView
android:id="@+id/local_music_bottom_tv_song"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:layout_toRightOf="@id/local_music_bottom_iv_icon"
android:layout_marginTop="10dp"
android:layout_marginLeft="10dp"
android:textSize="10sp"
android:textStyle="bold"/>
<TextView
android:id="@+id/local_music_bottom_tv_singer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textSize="8sp"
android:layout_below="@id/local_music_bottom_tv_song"
android:layout_alignLeft="@id/local_music_bottom_tv_song"
android:layout_marginTop="10dp"/>
<ImageView
android:id="@+id/local_music_bottom_iv_next"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:src="@mipmap/play_next"
android:layout_alignParentRight="true"
android:layout_marginRight="10dp"/>
<ImageView
android:id="@+id/local_music_bottom_iv_play"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:src="@mipmap/play"
android:layout_toLeftOf="@id/local_music_bottom_iv_next"
android:layout_marginRight="20dp"/>
<ImageView
android:id="@+id/local_music_bottom_iv_last"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:src="@mipmap/play_front"
android:layout_toLeftOf="@id/local_music_bottom_iv_play"
android:layout_marginRight="20dp"/>
RelativeLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/local_music_rv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@id/local_music_bottomlayout">
android.support.v7.widget.RecyclerView>
RelativeLayout>
2、layout_welcome文件编写
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/welcommig1">
<TextView
android:id="@+id/tc1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_marginTop="197dp"
android:layout_marginEnd="139dp"
android:fontFamily="sans-serif-condensed-medium"
android:text="BUG Player"
android:textColor="#FDFCFC"
android:textSize="28dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/tc1"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_marginTop="353dp"
android:fontFamily="sans-serif"
android:text="Chuyuxuan1.1.0"
android:textAlignment="center"
android:textAllCaps="false"
android:textColor="#ffffff"
android:textSize="20dp"
android:textStyle="bold" />
RelativeLayout>
layout_item编写
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginRight="10dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
app:contentPadding="20dp"
app:cardBackgroundColor="@color/colorPink"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/item_local_music_num"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1"
android:textColor="#141313"
android:layout_centerVertical="true"
android:textSize="20sp"
/>
<TextView
android:id="@+id/item_local_music_song"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="fsdfs"
android:textSize="18sp"
android:textColor="#0F0F0F"
android:layout_toRightOf="@id/item_local_music_num"
android:singleLine="true"
android:layout_marginLeft="20dp"/>
<TextView
android:id="@+id/item_local_music_singer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="fsfsd"
android:layout_below="@id/item_local_music_song"
android:layout_alignLeft="@id/item_local_music_song"
android:layout_marginTop="10dp"
android:textSize="14sp"
android:textColor="#050505"/>
<TextView
android:id="@+id/item_local_music_line"
android:layout_width="2dp"
android:layout_height="18dp"
android:background="#000000"
android:layout_toRightOf="@id/item_local_music_singer"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_alignTop="@id/item_local_music_singer"/>
<TextView
android:id="@+id/item_local_music_album"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:layout_toRightOf="@id/item_local_music_line"
android:layout_alignTop="@id/item_local_music_singer"
android:textSize="14sp"
android:textColor="#000000"
android:ellipsize="end"
android:singleLine="true"/>
<TextView
android:id="@+id/item_local_music_durtion"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/item_local_music_singer"
android:layout_alignParentRight="true"
android:text=""
android:textSize="14sp"
android:textColor="#050505"/>
RelativeLayout>
android.support.v7.widget.CardView>
3.小按钮模块布局
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginRight="10dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
app:contentPadding="20dp"
app:cardBackgroundColor="@color/colorPink"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/item_local_music_num"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1"
android:textColor="#141313"
android:layout_centerVertical="true"
android:textSize="20sp"
/>
<TextView
android:id="@+id/item_local_music_song"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="fsdfs"
android:textSize="18sp"
android:textColor="#0F0F0F"
android:layout_toRightOf="@id/item_local_music_num"
android:singleLine="true"
android:layout_marginLeft="20dp"/>
<TextView
android:id="@+id/item_local_music_singer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="fsfsd"
android:layout_below="@id/item_local_music_song"
android:layout_alignLeft="@id/item_local_music_song"
android:layout_marginTop="10dp"
android:textSize="14sp"
android:textColor="#050505"/>
<TextView
android:id="@+id/item_local_music_line"
android:layout_width="2dp"
android:layout_height="18dp"
android:background="#000000"
android:layout_toRightOf="@id/item_local_music_singer"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_alignTop="@id/item_local_music_singer"/>
<TextView
android:id="@+id/item_local_music_album"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:layout_toRightOf="@id/item_local_music_line"
android:layout_alignTop="@id/item_local_music_singer"
android:textSize="14sp"
android:textColor="#000000"
android:ellipsize="end"
android:singleLine="true"/>
<TextView
android:id="@+id/item_local_music_durtion"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/item_local_music_singer"
android:layout_alignParentRight="true"
android:text=""
android:textSize="14sp"
android:textColor="#050505"/>
RelativeLayout>
android.support.v7.widget.CardView>
好，到这里，xml布局文件就全部写完了，接下来是java逻辑代码：
MainActivity.java
package com.animee.localmusic;
import android.content.ContentResolver;
import android.database.Cursor;
import android.media.MediaPlayer;
import android.net.Uri;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
ImageView nextIv,playIv,lastIv;
TextView singerTv,songTv;
RecyclerView musicRv;
// 数据源
List<LocalMusicBean>mDatas;
private LocalMusicAdapter adapter;
// 记录当前正在播放的音乐的位置
int currnetPlayPosition = -1;
// 记录暂停音乐时进度条的位置
int currentPausePositionInSong = 0;
MediaPlayer mediaPlayer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
mediaPlayer = new MediaPlayer();
mDatas = new ArrayList<>();
// 创建适配器对象
adapter = new LocalMusicAdapter(this, mDatas);
musicRv.setAdapter(adapter);
// 设置布局管理器
LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
musicRv.setLayoutManager(layoutManager);
// 加载本地数据源
loadLocalMusicData();
// 设置每一项的点击事件
setEventListener();
}
private void setEventListener() {
/* 设置每一项的点击事件*/
adapter.setOnItemClickListener(new LocalMusicAdapter.OnItemClickListener() {
@Override
public void OnItemClick(View view, int position) {
currnetPlayPosition = position;
LocalMusicBean musicBean = mDatas.get(position);
playMusicInMusicBean(musicBean);
}
});
}
public void playMusicInMusicBean(LocalMusicBean musicBean) {
/*根据传入对象播放音乐*/
//设置底部显示的歌手名称和歌曲名
singerTv.setText(musicBean.getSinger());
songTv.setText(musicBean.getSong());
stopMusic();
// 重置多媒体播放器
mediaPlayer.reset();
// 设置新的播放路径
try {
mediaPlayer.setDataSource(musicBean.getPath());
playMusic();
} catch (IOException e) {
e.printStackTrace();
}
}
/*
* 点击播放按钮播放音乐，或者暂停从新播放
* 播放音乐有两种情况：
* 1.从暂停到播放
* 2.从停止到播放
* */
private void playMusic() {
/* 播放音乐的函数*/
if (mediaPlayer!=null&&!mediaPlayer.isPlaying()) {
if (currentPausePositionInSong == 0) {
try {
mediaPlayer.prepare();
mediaPlayer.start();
} catch (IOException e) {
e.printStackTrace();
}
}else{
// 从暂停到播放
mediaPlayer.seekTo(currentPausePositionInSong);
mediaPlayer.start();
}
playIv.setImageResource(R.mipmap.puse);
}
}
private void pauseMusic() {
/* 暂停音乐的函数*/
if (mediaPlayer!=null&&mediaPlayer.isPlaying()) {
currentPausePositionInSong = mediaPlayer.getCurrentPosition();
mediaPlayer.pause();
playIv.setImageResource(R.mipmap.puse);
}
}
private void stopMusic() {
/* 停止音乐的函数*/
if (mediaPlayer!=null) {
currentPausePositionInSong = 0;
mediaPlayer.pause();
mediaPlayer.seekTo(0);
mediaPlayer.stop();
playIv.setImageResource(R.mipmap.icon_play);
}
}
@Override
protected void onDestroy()
{
super.onDestroy();
stopMusic();
}
private void loadLocalMusicData()
{
/* 加载本地存储当中的音乐mp3文件到集合当中*/
// 1.获取ContentResolver对象
ContentResolver resolver = getContentResolver();
// 2.获取本地音乐存储的Uri地址
Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
// 3 开始查询地址
Cursor cursor = resolver.query(uri, null, null, null, null);
// 4.遍历Cursor
int id = 0;
while (cursor.moveToNext()) {
String song = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.TITLE));
String singer = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));
String album = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM));
id++;
String sid = String.valueOf(id);
String path = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA));
long duration = cursor.getLong(cursor.getColumnIndex(MediaStore.Audio.Media.DURATION));
SimpleDateFormat sdf = new SimpleDateFormat("mm:ss");
String time = sdf.format(new Date(duration));
// 将一行当中的数据封装到对象当中
LocalMusicBean bean = new LocalMusicBean(sid, song, singer, album, time, path);
mDatas.add(bean);
}
// 数据源变化，提示适配器更新
adapter.notifyDataSetChanged();
}
private void initView()
{
/* 初始化控件的函数*/
nextIv = findViewById(R.id.local_music_bottom_iv_next);
playIv = findViewById(R.id.local_music_bottom_iv_play);
lastIv = findViewById(R.id.local_music_bottom_iv_last);
singerTv = findViewById(R.id.local_music_bottom_tv_singer);
songTv = findViewById(R.id.local_music_bottom_tv_song);
musicRv = findViewById(R.id.local_music_rv);
nextIv.setOnClickListener(this);
lastIv.setOnClickListener(this);
playIv.setOnClickListener(this);
/*继承父类接口*/
}
/*点击事件方法重写*/
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.local_music_bottom_iv_last:
if (currnetPlayPosition ==0) {
Toast.makeText(this,"已经是第一首了，没有上一曲！",Toast.LENGTH_SHORT).show();
return;
}
currnetPlayPosition = currnetPlayPosition-1;
LocalMusicBean lastBean = mDatas.get(currnetPlayPosition);
playMusicInMusicBean(lastBean);
break;
case R.id.local_music_bottom_iv_next:
if (currnetPlayPosition ==mDatas.size()-1) {
Toast.makeText(this,"已经是最后一首了，没有下一曲！",Toast.LENGTH_SHORT).show();
return;
}
currnetPlayPosition = currnetPlayPosition+1;
LocalMusicBean nextBean = mDatas.get(currnetPlayPosition);
playMusicInMusicBean(nextBean);
break;
case R.id.local_music_bottom_iv_play:
if (currnetPlayPosition == -1) {
// 并没有选中要播放的音乐
Toast.makeText(this,"请选择想要播放的音乐",Toast.LENGTH_SHORT).show();
return;
}
if (mediaPlayer.isPlaying()) {
// 此时处于播放状态，需要暂停音乐
pauseMusic();
}else {
// 此时没有播放音乐，点击开始播放音乐
playMusic();
}
break;
}
}
}
Adapter适配器
package com.animee.localmusic;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.List;
public class LocalMusicAdapter extends RecyclerView.Adapter<LocalMusicAdapter.LocalMusicViewHolder>{
Context context;
List<LocalMusicBean>mDatas;
OnItemClickListener onItemClickListener;
public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
this.onItemClickListener = onItemClickListener;
}
public interface OnItemClickListener{
public void OnItemClick(View view,int position);
}
public LocalMusicAdapter(Context context, List<LocalMusicBean> mDatas) {
this.context = context;
this.mDatas = mDatas;
}
@NonNull
@Override
public LocalMusicViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.item_local_music,parent,false);
LocalMusicViewHolder holder = new LocalMusicViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(@NonNull LocalMusicViewHolder holder, final int position) {
LocalMusicBean musicBean = mDatas.get(position);
holder.idTv.setText(musicBean.getId());
holder.songTv.setText(musicBean.getSong());
holder.singerTv.setText(musicBean.getSinger());
holder.albumTv.setText(musicBean.getAlbum());
holder.timeTv.setText(musicBean.getDuration());
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onItemClickListener.OnItemClick(v,position);
}
});
}
@Override
public int getItemCount() {
return mDatas.size();
}
class LocalMusicViewHolder extends RecyclerView.ViewHolder{
TextView idTv,songTv,singerTv,albumTv,timeTv;
public LocalMusicViewHolder(View itemView) {
super(itemView);
idTv = itemView.findViewById(R.id.item_local_music_num);
songTv = itemView.findViewById(R.id.item_local_music_song);
singerTv = itemView.findViewById(R.id.item_local_music_singer);
albumTv = itemView.findViewById(R.id.item_local_music_album);
timeTv = itemView.findViewById(R.id.item_local_music_durtion);
}
}
}
music Bean类
package com.animee.localmusic;
public class LocalMusicBean {
private String id; //歌曲id
private String song; //歌曲名称
private String singer; //歌手名称
private String album; //专辑名称
private String duration; //歌曲时长
private String path; //歌曲路径
// public LocalMusicBean() {
// }
public LocalMusicBean(String id, String song, String singer, String album, String duration, String path)
{
this.id = id;
this.song = song;
this.singer = singer;
this.album = album;
this.duration = duration;
this.path = path;
}
public String getId()
{
return id;
}
public void setId(String id) {
this.id = id;
}
public String getSong() {
return song;
}
public void setSong(String song) {
this.song = song;
}
public String getSinger() {
return singer;
}
public void setSinger(String singer) {
this.singer = singer;
}
public String getAlbum() {
return album;
}
public void setAlbum(String album) {
this.album = album;
}
public String getDuration() {
return duration;
}
public void setDuration(String duration) {
this.duration = duration;
}
public String getPath() {
return path;
}
public void setPath(String path) {
this.path = path;
}
}
欢迎界面
package com.animee.localmusic;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.Nullable;
import android.view.WindowManager;
public class weclomeActivity extends Activity
{
protected void onCreate(@Nullable Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
getWindow().setFlags( WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN );
setContentView(R.layout.activity_welcome);
handler.sendEmptyMessageDelayed(0,3000);
}
private Handler handler = new Handler()
{
@Override
public void handleMessage(Message msg)
{
getHome();
super.handleMessage(msg);
}
};
public void getHome(){
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);
finish();
}
}