Service后台音乐播放器
Seriver案例后台音乐播放器
- 案例
案例
音乐播放器
先初始化音乐列表
需要添加权限
获取音频
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
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"
tools:context=".MainActivity">
<ListView
android:layout_above="@id/ll"
android:id="@+id/lv"
android:layout_width="match_parent"
android:layout_height="match_parent"></ListView>
<LinearLayout
android:id="@+id/ll"
android:layout_alignParentBottom="true"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:onClick="shangyishou"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/zjiantou"
/>
<Button
android:onClick="bofang"
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="播放"
/>
<Button
android:onClick="tingzhi"
android:layout_toRightOf="@id/button"
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="停止"
/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/jiantou"
android:onClick="xiayishou"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/name"
/>
</LinearLayout>
</RelativeLayout>
<?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">
<LinearLayout
android:orientation="vertical"
android:id="@+id/ll"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tname"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tphone"
/>
<TextView
android:id="@+id/time"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
</RelativeLayout>
package com.example.muscikplayqi;
import android.app.Service;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Intent;
import android.content.ServiceConnection;
import android.database.Cursor;
import android.os.IBinder;
import android.provider.ContactsContract;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
static ArrayList<Musick> musicks;
Myservice myservice;
TextView textView;
TextView textView1;
ServiceConnection serviceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
myservice = ((Myservice.MyBinder) service).getservice();
}
@Override
public void onServiceDisconnected(ComponentName name) {
}
};
ListView listView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView1=findViewById(R.id.name);
textView=findViewById(R.id.name);
listView = findViewById(R.id.lv);
ContentResolver contentResolver = getContentResolver();
Cursor query = contentResolver.query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null, null, null, null);
musicks = new ArrayList<>();
while (query.moveToNext()) {
String string = query.getString(query.getColumnIndex(MediaStore.Audio.Media.TITLE));
String string1 = query.getString(query.getColumnIndex(MediaStore.Audio.Media.ARTIST));
long aLong = query.getLong(query.getColumnIndex(MediaStore.Audio.Media.DURATION));
String time = getTime(aLong);
String string2 = query.getString(query.getColumnIndex(MediaStore.Audio.Media.DATA));
Musick musick = new Musick(string, string1, time, string2);
musicks.add(musick);
}
for (Musick s : musicks) {
Log.e("####", "onCreate: " + s.toString());
}
Intent intent = new Intent(this, Myservice.class);
bindService(intent, serviceConnection, Service.BIND_AUTO_CREATE);
listView.setAdapter(new MyBaseadpter(MainActivity.this, musicks));
}
public String getTime(long l) {
long sum = l / 1000;
int f = (int) (sum / 60);
int m = (int) (sum % 60);
String f1 = f + "";
String f2 = m + "";
if (f < 10) {
f1 = 0 + "" + f;
}
if (m < 10) {
f2 = 0 + "" + m;
}
return f1 + ":" + f2;
}
public void bofang(View view) {
try {
Musick musick = musicks.get(0);
myservice.play(musicks);
textView1.setText(musicks.get(Share.flag).name);
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
protected void onDestroy() {
super.onDestroy();
unbindService(serviceConnection);
}
public void tingzhi(View view) {
myservice.tingzhi();
}
public void shangyishou(View view) {
myservice.rec();
textView1.setText(musicks.get(Share.flag).name);
}
public void xiayishou(View view) {
myservice.next();
textView1.setText(musicks.get(Share.flag).name);
}
}
package com.example.muscikplayqi;
public class Musick {
String name;
String singer;
String time;
String address;
public Musick(String name, String singer, String time, String address) {
this.name = name;
this.singer = singer;
this.time = time;
this.address = address;
}
@Override
public String toString() {
return "Musick{" +
"name='" + name + '\'' +
", singer='" + singer + '\'' +
", time=" + time +
", address='" + address + '\'' +
'}';
}
}
package com.example.muscikplayqi;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.ArrayList;
public class MyBaseadpter extends BaseAdapter {
Context context;
ArrayList<Musick> getjson ;
public MyBaseadpter(Context context, ArrayList<Musick> getjson) {
this.context = context;
this.getjson = getjson;
}
@Override
public int getCount() {
return getjson.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHodler viewHodler;
if(convertView==null){
viewHodler=new ViewHodler();
convertView=View.inflate(context,R.layout.sim,null);
viewHodler.textView1=convertView.findViewById(R.id.tname);
viewHodler.textView2=convertView.findViewById(R.id.tphone);
viewHodler.textView3=convertView.findViewById(R.id.time);
convertView.setTag(viewHodler);
}else{
viewHodler = (ViewHodler) convertView.getTag();
}
if(viewHodler!=null){
Musick musick = getjson.get(position);
viewHodler.textView1.setText(musick.name);
viewHodler.textView2.setText(musick.singer);
viewHodler.textView3.setText(musick.time);
}
return convertView;
}
class ViewHodler{
TextView textView1;
TextView textView2;
TextView textView3;
}
}
package com.example.muscikplayqi;
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Binder;
import android.os.IBinder;
import java.io.IOException;
import java.util.ArrayList;
public class Myservice extends Service {
MediaPlayer mediaPlayer;
@Override
public IBinder onBind(Intent intent) {
return new MyBinder();
}
public void play(ArrayList<Musick> musicks) throws IOException {
Musick musick = musicks.get(Share.flag);
if(mediaPlayer==null){
mediaPlayer=new MediaPlayer();
mediaPlayer.setDataSource(musick.address);
mediaPlayer.prepare();
mediaPlayer.start();
}else{
mediaPlayer.start();
}
}
public void tingzhi(){
if(mediaPlayer!=null){
mediaPlayer.pause();
}
}
public void stop() {
if(mediaPlayer!=null){
mediaPlayer.stop();//暂停音乐
mediaPlayer.release();//资源释放
mediaPlayer=null;//设置为null
}
}
public void next(){
stop();
if(Share.flag+1<MainActivity.musicks.size()){
Share.flag++;
try {
play(MainActivity.musicks);
} catch (IOException e) {
e.printStackTrace();
}
}else{
Share.flag=0;
try {
play(MainActivity.musicks);
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void rec(){
stop();
if(Share.flag-1<0){
Share.flag=MainActivity.musicks.size()-1;
try {
play(MainActivity.musicks);
} catch (IOException e) {
e.printStackTrace();
}
}else{
Share.flag--;
try {
play(MainActivity.musicks);
} catch (IOException e) {
e.printStackTrace();
}
}
}
class MyBinder extends Binder{
public Myservice getservice(){
return Myservice.this;
}
}
}
package com.example.muscikplayqi;
public class Share {
static int flag=0;
}
记得要注册清单文件的service哦