Android简易音乐播放器实现代码

本文实例为大家分享了Android音乐播放器的具体代码，供大家参考，具体内容如下

1.播放项目内的音乐

package com.thm.g150820_android26_playmusic;
import Android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
import android.widget.SeekBar;

public class MainActivity extends AppCompatActivity {

private MediaPlayer mediaPlayer;
private SeekBar seekBar;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
seekBar = (SeekBar) findViewById(R.id.seekBar);

seekBar.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) {
//获取拖动结束之后的位置
int progress = seekBar.getProgress();
//跳转到某个位置播放
mediaPlayer.seekTo(progress);
}
});
}

public void isPlayOrPause(View view){
//把View强转为ImageButton
ImageButton imageButton = (ImageButton) view;

if(mediaPlayer==null) {
//实例化MediaPlayer
mediaPlayer = MediaPlayer.create(this, R.raw.yao);
//开始播放
mediaPlayer.start();
//图标修改为暂停的图标
imageButton.setImageResource(android.R.drawable.ic_media_pause);
//获取音乐的总时长
int duration = mediaPlayer.getDuration();
//设置进度条的最大值为音乐的总时长
seekBar.setMax(duration);

new MyThre().start();

}//判断如果音乐在播放
else if(mediaPlayer.isPlaying()){
//就暂停音乐
mediaPlayer.pause();
//图标修改为播放的图标
imageButton.setImageResource(android.R.drawable.ic_media_play);
}else{
mediaPlayer.start();
//图标修改为暂停的图标
imageButton.setImageResource(android.R.drawable.ic_media_pause);
}
}

//写内部类
class MyThre extends Thread{
@Override
public void run() {
super.run();
while(seekBar.getProgress()<=seekBar.getMax()){

//获取当前音乐播放的位置
int currentPosition = mediaPlayer.getCurrentPosition();

//让进度条动起来
seekBar.setProgress(currentPosition);
}
}
}
}

2.播放内存卡中的音乐

package com.thm.g150820_android26_playmusic;

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
import android.widget.SeekBar;

import java.io.IOException;

public class MainActivity extends AppCompatActivity {

private MediaPlayer mediaPlayer;
private SeekBar seekBar;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
seekBar = (SeekBar) findViewById(R.id.seekBar);

seekBar.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) {
//获取拖动结束之后的位置
int progress = seekBar.getProgress();
//跳转到某个位置播放
mediaPlayer.seekTo(progress);
}
});
}

public void isPlayOrPause(View view){
//把View强转为ImageButton
ImageButton imageButton = (ImageButton) view;

if(mediaPlayer==null) {
//实例化MediaPlayer
//播放应用内的音乐
//mediaPlayer = MediaPlayer.create(this, R.raw.yao);

//播放内存卡中的音乐
mediaPlayer = new MediaPlayer();

//设置类型
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
//设置音乐路径
try {
mediaPlayer.setDataSource(this, Uri.parse("storage/sdcard0/Music/a.mp3"));
//播放之前准备一下
mediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
}

//开始播放
mediaPlayer.start();
//图标修改为暂停的图标
imageButton.setImageResource(android.R.drawable.ic_media_pause);
//获取音乐的总时长
int duration = mediaPlayer.getDuration();
//设置进度条的最大值为音乐的总时长
seekBar.setMax(duration);

new MyThre().start();

}//判断如果音乐在播放
else if(mediaPlayer.isPlaying()){
//就暂停音乐
mediaPlayer.pause();
//图标修改为播放的图标
imageButton.setImageResource(android.R.drawable.ic_media_play);
}else{
mediaPlayer.start();
//图标修改为暂停的图标
imageButton.setImageResource(android.R.drawable.ic_media_pause);
}
}

//写线程内部类
class MyThre extends Thread{
@Override
public void run() {
super.run();
while(seekBar.getProgress()<=seekBar.getMax()){

//获取当前音乐播放的位置
int currentPosition = mediaPlayer.getCurrentPosition();

//让进度条动起来
seekBar.setProgress(currentPosition);
}
}
}
}

3.添加读取内存的权限