畅想音乐播放器第二版

很久没更新了，之前说的每周更新一版播放器也没算数，原因是自己实在太忙了，sorry。

播放器最近不会更新了，但是我会开始做一个天气app,这次肯定会记录进展的。

第二版功能分析：

1.继承第一版的所有功能

2.设计一个SQLite数据库，用来记录播放过的音乐

3.加上一个播放队列用来显示已经播放过的音乐

4.加一个Notification,用来显示正在播放的音乐，并且音乐在后台播放的时候，可以通过notification来控制暂停，上一首，下一首。

*数据库设计，用SqlOpenHelper创建一个SQLite数据库

public class SqlOpenHelper extends SQLiteOpenHelper {
public SqlOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
super(context, name, factory, version);
}
public SqlOpenHelper(Context context, String name) {
super(context, name, null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table if not exists musicQueen(_id integer primary key,musicUrl text not null,musicName text ,musicPlayer text,musicSize integer,musicDuration integer)");
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

}
}

*自定义一个popupWindow,弹出播放队列

popupWindow内部是一个ListView,ListView的每一item包括歌手名，删除按钮



代码如下：

playQeen.xml

<?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">
<RelativeLayout
android:id="@+id/playQueen"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/play"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/play_queen"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:textStyle="bold"/>
<TextView
android:id="@+id/play_count"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@+id/play"
android:layout_centerVertical="true"
android:textStyle="bold"
/>
<TextView
android:id="@+id/youkuohao"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@+id/play_count"
android:layout_centerVertical="true"
android:textStyle="bold"
android:text=")"/>
<ImageButton
android:id="@+id/clear_all"
android:layout_width="40dp"
android:layout_height="40dp"
android:padding="0dp"
android:src="@drawable/play_queen_delete"
android:background="@color/transparent"
android:layout_alignParentRight="true"
android:focusable="false"
android:focusableInTouchMode="false"
/>
</RelativeLayout>
<ListView
android:id="@+id/play_queue"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_below="@+id/playQueen"

></ListView>
</RelativeLayout>

弹出一个popupWindow

/**
* 弹出一个PopupWindow,显示播放队列
*/
public void popupWindow(){
popupView=LayoutInflater.from(getActivity()).inflate(R.layout.play_queen,null);
popupWindow=new PopupWindow(popupView, ActionBar.LayoutParams.MATCH_PARENT, ActionBar.LayoutParams.WRAP_CONTENT,true);

playCount= (TextView) popupView.findViewById(R.id.play_count);
setAdapter();
playQeenDeleteLisener();
setItemClickListener();
playCount.setText(queenBeens.size()+"");

//        popupWindow.setFocusable(true);
popupWindow.setBackgroundDrawable(new BitmapDrawable(BitmapFactory.decodeResource(getResources(),R.mipmap.play_queen_bg)));
popupWindow.showAtLocation(popupView, Gravity.BOTTOM,0,0);
popupView.setOnKeyListener(new View.OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (event.KEYCODE_BACK==keyCode){
popupWindow.dismiss();
}
else if (keyCode==event.KEYCODE_VOLUME_UP){
popupWindow.showAsDropDown(view);
return true;
}
return false;
}
});
}
/**
* 为popupView设置适配器
*/
public void setAdapter(){
playQueen= (ListView)popupView.findViewById(R.id.play_queue);
queenBeens=getPopupViewData();
adapter=new MyPlayQueenAdapter(getActivity(),queenBeens);
playQueen.setAdapter(adapter);
}
/**
* 为popupView获取数据
* _id integer primary key,musicUrl text not null,musicName text ,musicPlayer text,musicSize integer,musicDuration integer
*/
public ArrayList<MusicQueenBean> getPopupViewData(){
ArrayList<MusicQueenBean> list=new ArrayList<>();
sqlOpenHelper=new SqlOpenHelper(getActivity(),"changxiang_music.db");
database=sqlOpenHelper.getReadableDatabase();
Cursor cursor=database.query("musicQueen",null,null,null,null,null,null);
if (cursor!=null){
for (int i=0;i<cursor.getCount();i++){
cursor.moveToNext();
MusicQueenBean bean=new MusicQueenBean();
bean.set_id(cursor.getLong(cursor.getColumnIndex("_id")));
bean.setMusicUrl(cursor.getString(cursor.getColumnIndex("musicUrl")));
bean.setMusicName(cursor.getString(cursor.getColumnIndex("musicName")));
bean.setMusicPlayer(cursor.getString(cursor.getColumnIndex("musicPlayer")));
bean.setMusicSize(cursor.getLong(cursor.getColumnIndex("musicSize")));
bean.setMusicDuration(cursor.getLong(cursor.getColumnIndex("musicDuration")));
list.add(bean);
}
}
return list;
}
/**
* 监听删除播放队列按钮
*/
public void playQeenDeleteLisener(){
playQeenDelete= (ImageButton) popupView.findViewById(R.id.clear_all);
playQeenDelete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
queenBeens.clear();
clearAllInDataBase();
adapter.notifyDataSetChanged();
}
});
}
/**
*清除播放队列数据库中的一切
*/
public void clearAllInDataBase(){
database.delete("musicQueen",null,null);

}
/**
* 设置播放队列的点击事件
*/
public void setItemClickListener(){
playQueen.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent=new Intent();
intent.setAction(Constant.playQueenClick);
intent.putExtra(Constant.musicUri,queenBeens.get(position).getMusicUrl());
getActivity().sendBroadcast(intent);
musicAlbum.setImageBitmap(MediaUtils.getAlbumBitmap(getActivity(),queenBeens.get(position).get_id()));
musicName.setText(queenBeens.get(position).getMusicName());
playerName.setText(queenBeens.get(position).getMusicPlayer());
playButton.setImageResource(R.mipmap.stop);
StaticData.isPlaying=true;
StaticData.isPause=false;
}
});
}

*自定义一个Notification



代码如下：

Notification_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/notification"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="0dp"
android:background="@color/black_half_transparent"
android:clickable="true">
<ImageView
android:id="@+id/not_musicAlbum"
android:layout_width="70dp"
android:layout_height="70dp"
android:background="@mipmap/music_album"
/>
<TextView
android:id="@+id/not_musicName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="音乐名"
android:layout_toRightOf="@+id/not_musicAlbum"
android:layout_marginLeft="10dp"
android:textColor="@color/half_transparent"
android:singleLine="true"
android:textSize="16sp"
/>
<TextView
android:id="@+id/not_musicAritist"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/not_musicName"
android:text="歌手"
android:layout_toRightOf="@+id/not_musicAlbum"
android:layout_marginLeft="10dp"
android:textSize="12sp"
android:textColor="@color/half_transparent"

/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"

android:layout_below="@+id/not_musicAritist"
android:layout_toRightOf="@+id/not_musicAlbum">
<ImageButton
android:id="@+id/not_prebtn"
android:layout_width="25dp"
android:layout_height="25dp"
android:layout_marginLeft="8dp"
android:background="@color/transparent"
android:src="@drawable/pre_btn_click"
/>

<ImageButton
android:id="@+id/not_play"
android:layout_width="25dp"
android:layout_height="25dp"
android:layout_toRightOf="@+id/not_prebtn"
android:src="@drawable/not_pause_click"
android:background="@color/transparent"

android:layout_marginLeft="25dp"
/>
<ImageButton
android:id="@+id/not_next"
android:layout_width="25dp"
android:layout_height="25dp"
android:layout_toRightOf="@+id/not_play"
android:src="@drawable/not_next_click"
android:background="@color/transparent"
android:layout_marginLeft="25dp"
/>
</RelativeLayout>
</RelativeLayout>

创建Notification并实现它的数据

/**
* 创建通知栏
*/
public void createNotification(){

builder=new NotificationCompat.Builder(getApplicationContext());
builder.setSmallIcon(R.mipmap.icon_player);
builder.setTicker(getString(R.string.notification_ticker));
notification=builder.build();
remoteViews=new RemoteViews(getPackageName(),R.layout.notification_item);
/**
* 重置里面的UI
*/
resetNotification(remoteViews);
/**
* 设置监听
*/
setNotificationListener();

notification.contentView=remoteViews;
notification.flags=Notification.FLAG_NO_CLEAR; //设置通知或者滑动式不被清除
notificationManager= (NotificationManager) getApplicationContext().getSystemService(Service.NOTIFICATION_SERVICE);
notificationManager.notify(notificationId,notification);

}
/**
* 重置通知栏里面的UI
*/
public void resetNotification(RemoteViews remoteViews){
Bitmap bitmap=MediaUtils.getAlbumBitmap(getApplicationContext(),list.get(StaticData.position).getId());
remoteViews.setImageViewBitmap(R.id.not_musicAlbum,bitmap);
remoteViews.setTextViewText(R.id.not_musicName,list.get(StaticData.position).getTitle());
remoteViews.setTextViewText(R.id.not_musicAritist,list.get(StaticData.position).getArtist());
if (StaticData.isPlaying){
remoteViews.setImageViewResource(R.id.not_play,R.mipmap.widget_pause_button_default);

}
else if (StaticData.isPause){
remoteViews.setImageViewResource(R.id.not_play,R.mipmap.widget_play_button_default);
}
}
/**
* 设置通知栏上按钮的监听事件
*/
public void setNotificationListener(){
//上一首按钮
Intent preIntent=new Intent();
preIntent.setAction(Constant.NOTI_PREMUSIC);
PendingIntent prePreIntent=PendingIntent.getBroadcast(getApplicationContext(),0,preIntent,0);
remoteViews.setOnClickPendingIntent(R.id.not_prebtn,prePreIntent);
//播放按钮
Intent playIntent=new Intent();
playIntent.setAction(Constant.NOTI_PLAYMUSIC);
PendingIntent playPreIntent=PendingIntent.getBroadcast(getApplicationContext(),0,playIntent,0);
remoteViews.setOnClickPendingIntent(R.id.not_play,playPreIntent);
//下一首按钮
Intent nextIntent=new Intent();
nextIntent.setAction(Constant.NOTI_NEXTMUSIC);
PendingIntent nextPreIntent=PendingIntent.getBroadcast(getApplicationContext(),0,nextIntent,0);
remoteViews.setOnClickPendingIntent(R.id.not_next,nextPreIntent);
Intent intent=new Intent(this,MainActivity.class);
PendingIntent pendingIntent=PendingIntent.getActivity(getApplicationContext(),0,intent,0);
remoteViews.setOnClickPendingIntent(R.id.notification,pendingIntent);

}
/**
* 状态栏上播放方法
*/
public void notificationPlay(){
if (StaticData.isPlaying){
StaticData.isPlaying=false;
StaticData.isPause=true;
remoteViews.setImageViewResource(R.id.not_play,R.mipmap.widget_play_button_default);

mediaPlayer.pause();
}
else if (StaticData.isPause){
StaticData.isPlaying=true;
StaticData.isPause=false;
remoteViews.setImageViewResource(R.id.not_play,R.mipmap.widget_pause_button_default);
mediaPlayer.start();

}
}

还是那句话，需要源代码的联系QQ 2372126585 ,最好是发邮件。什么东西都需要交流学习，闭关锁国是不行的。