求大神重写MediaPlayer类播放代码！！【非整套代码】 - 无忧启动论坛

<?xml version='1.0' encoding='utf-8'?>
<manifest
xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mycompany.myapp">
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme"
android:resizeableActivity="false">
<activity
android:name=".MainActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<meta-data
android:name="android.max_aspect"
android:value="4.0"/>
</application>
</manifest>

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="先在存储器根目录新建好NX文件夹后，把多个mp3文件放进去，再次打开本APP就可以快速预览这些音频了。目前是个半成品当然你可以自己随意修改代码让自己满意！"
android:layout_marginTop="100dp"/>
</LinearLayout>

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package com.mycompany.myapp;
/*2023-8-6首发于无忧论坛作者无忧2011阿星无忧879792799整理修改*/
/*此源码无恶意代码且简单需要编译才能成apk 仅十几k 只需读存储权限编译器有的会带病毒不建议新手使用*/
import android.app.Activity;
import android.os.Bundle;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Build;
import android.os.Handler;
import android.os.Message;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Toast;
import android.app.*;
import android.os.*;
import android.widget.*;
import java.util.*;
import android.content.*;
import java.text.*;
import java.io.*;
import android.view.View.OnClickListener;
import android.widget.AdapterView.OnItemClickListener;
public class MainActivity extends Activity { //每个APP都有一个默认界面
private MediaPlayer mediaPlayer;
private List<String> audioFiles; //把文件夹的音频排成一个数组
private int currentIndex = 0; //数组的下标
private Handler handler; //多线程貌似没起作用
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); //APP程序入口从此往下执行
setContentView(R.layout.activity_main); //绑定主界面的布局文件
// 初始化MediaPlayer
mediaPlayer = new MediaPlayer();
// 获取音频文件列表
audioFiles = getAudioFiles("/sdcard/NX/"); //在根目录自己新建NX文件夹
// 开始播放
playNextAudio();
}
private List<String> getAudioFiles(String folderPath) { //定义音频文件集合而成数组
List<String> files = new ArrayList<>();
File folder = new File(folderPath);
File[] audioFiles = folder.listFiles(new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
return name.toLowerCase().endsWith(".mp3"); // 可根据需要修改文件类型筛选文件后缀名
}
});
if (audioFiles != null) {
for (File file : audioFiles) {
files.add(file.getAbsolutePath()); //加入数组中
}
}
return files;
}
private void playNextAudio() {
if (currentIndex >= audioFiles.size()) { //数组下标大于音频总数就返回
// 播放列表已结束
return;
}
String audioFile = audioFiles.get(currentIndex); //逐个提取音频文件
mediaPlayer.reset();
try {
mediaPlayer.setDataSource(audioFile); //把数组中逐个提取音频给播放器
} catch (IOException e) {} catch (IllegalStateException e) {} catch (IllegalArgumentException e) {} catch (SecurityException e) {}
try {
mediaPlayer.prepare(); //播放器准备
} catch (IOException e) {} catch (IllegalStateException e) {}
mediaPlayer.start(); //播放器开始播放
int duration = mediaPlayer.getDuration(); //获取当前音频的总时长
if(duration>60000){ //假如音频时长大于1分钟就往下执行否则就跳到下一音频
Random random = new Random(); //准备随机方法
int startPos= random.nextInt(duration - 60000); // 播放开始点A 随机时间点不能是最后1分钟防止播放时间太短就结束了
int endPos = startPos+30000; //播放结束时间点B 结束时间是开始时间往后30秒

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try {
repeatAToB(startPos, endPos, 1); //从开始时间到结束时间播放且播放重复一遍
} catch (Exception e) {}
}
else{
currentIndex++; //再把音频数组下标加一位，就是下一个音频文件
playNextAudio(); //再次从playNextAudio处执行
}
}
private void repeatAToB(final int startPos, final int endPos, final int repeatTimes)throws Exception { //这个方法就是从随机起始点A播放A播放到结束时间点B
mediaPlayer.seekTo(startPos);
mediaPlayer.start();
CountDownTimer cntr_aCounter = new CountDownTimer(/* millisInFuture= */endPos - startPos, /* countDownInterval= */1000) { //倒计时方法
public void onTick(long millisUntilFinished) {
// DO SOMETHING
}
public void onFinish() {
// Code fire after finish
if((repeatTimes - 1) > 0){
try {
repeatAToB(startPos, endPos, repeatTimes - 1);
} catch (Exception e) {
e.printStackTrace();
}
}else{
mediaPlayer.stop();
currentIndex++;
playNextAudio();
}
}
};
cntr_aCounter.start();
}
//从内存中销毁并退出
@Override
protected void onDestroy() {
super.onDestroy();
mediaPlayer.release();
handler.removeCallbacksAndMessages(null);
}}

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private MediaPlayer mediaPlayer;
private List<String> audioFiles;
private int currentIndex = 0;
private boolean isPlaying = false;
private Handler handler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 初始化MediaPlayer
mediaPlayer = new MediaPlayer();
mediaPlayer.setOnCompletionListener(this);
// 获取音频文件列表
audioFiles = getAudioFiles("/path");
// 创建Handler用于处理定时任务
handler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
if (isPlaying) {
mediaPlayer.pause();
mediaPlayer.seekTo(msg.arg1);
mediaPlayer.start();
}
return true;
}
});
// 开始播放
playNextAudio();
}
private List<String> getAudioFiles(String folderPath) {
List<String> files = new ArrayList<>();
File folder = new File(folderPath);
File[] audioFiles = folder.listFiles(new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
return name.toLowerCase().endsWith(".mp3"); // 可根据需要修改文件类型
}
});
if (audioFiles != null) {
for (File file : audioFiles) {
files.add(file.getAbsolutePath());
}
}
return files;
}
private void playNextAudio() {
if (currentIndex >= audioFiles.size()) {
// 播放列表已结束
return;
}
String audioFile = audioFiles.get(currentIndex);
try {
mediaPlayer.reset();
mediaPlayer.setDataSource(audioFile);
mediaPlayer.prepare();
mediaPlayer.start();
// 随机选择播放时间点
int duration = mediaPlayer.getDuration();
Random random = new Random();
int randomTime = random.nextInt(duration - 120000); // 随机时间点不能是最后2分钟
int delay = randomTime - mediaPlayer.getCurrentPosition();
// 发送定时任务消息
Message message = handler.obtainMessage();
message.arg1 = randomTime;
handler.sendMessageDelayed(message, delay);
isPlaying = true;
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onCompletion(MediaPlayer mp) {
// 音频播放完成
currentIndex++;
if (currentIndex < audioFiles.size()) {
// 继续播放下一首音频
playNextAudio();
} else {
// 播放列表已结束
isPlaying = false;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
mediaPlayer.release();
handler.removeCallbacksAndMessages(null);
}

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public void play(final String filePath) throws Exception {
try {
if (mMediaPlayer == null) {
// 创建MediaPlayer对象并设置Listener
mMediaPlayer = new MediaPlayer();
} else {
// 复用MediaPlayer对象
mMediaPlayer.reset();
}
mMediaPlayer.setDataSource(filePath);
mMediaPlayer.prepare();
mMediaPlayer.setVolume(10.f, 1.0f);
// 复读第10秒到第20秒这个区间的音频
int startPos = 10000;
int endPos = 20000;
// Try to play three times
repeatAToB(startPos, endPos, 3);
} catch (Exception e) {
e.printStackTrace();
}
}
private void repeatAToB(final int startPos, final int endPos, final int repeatTimes)throws Exception {
mMediaPlayer.seekTo(startPos);
mMediaPlayer.start();
CountDownTimer cntr_aCounter = new CountDownTimer(/* millisInFuture= */endPos - startPos, /* countDownInterval= */1000) {
public void onTick(long millisUntilFinished) {
// DO SOMETHING
}
public void onFinish() {
// Code fire after finish
if((repeatTimes - 1) > 0){
try {
repeatAToB(startPos, endPos, repeatTimes - 1);
} catch (Exception e) {
e.printStackTrace();
}
}else{
mMediaPlayer.stop();
}
}
};
cntr_aCounter.start();
}

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作者无忧阿星2011
private MediaPlayer mediaPlayer;
private List<String> audioFiles;
private int currentIndex = 0;
private boolean isPlaying = false;
private Handler handler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 初始化MediaPlayer
mediaPlayer = new MediaPlayer();
mediaPlayer.setOnCompletionListener(this);
// 获取音频文件列表
audioFiles = getAudioFiles("/path");
// 创建Handler用于处理定时任务
handler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
if (isPlaying) {
mediaPlayer.pause();
mediaPlayer.seekTo(msg.arg1);
mediaPlayer.start();
}
return true;
}
});
// 开始播放
playNextAudio();
}
private List<String> getAudioFiles(String folderPath) {
List<String> files = new ArrayList<>();
File folder = new File(folderPath);
File[] audioFiles = folder.listFiles(new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
return name.toLowerCase().endsWith(".mp3"); // 可根据需要修改文件类型
}
});
if (audioFiles != null) {
for (File file : audioFiles) {
files.add(file.getAbsolutePath());
}
}
return files;
}
private void playNextAudio() {
if (currentIndex >= audioFiles.size()) {
// 播放列表已结束
return;
}
String audioFile = audioFiles.get(currentIndex);
try {
mediaPlayer.reset();
mediaPlayer.setDataSource(audioFile);
mediaPlayer.prepare();
mediaPlayer.start();
// 随机选择播放时间点
int duration = mediaPlayer.getDuration();
Random random = new Random();
int randomTime = random.nextInt(duration - 120000); // 随机时间点不能是最后2分钟
int delay = randomTime - mediaPlayer.getCurrentPosition();
// 发送定时任务消息
Message message = handler.obtainMessage();
message.arg1 = randomTime;
handler.sendMessageDelayed(message, delay);
isPlaying = true;
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onCompletion(MediaPlayer mp) {
// 音频播放完成
currentIndex++;
if (currentIndex < audioFiles.size()) {
// 继续播放下一首音频
playNextAudio();
} else {
// 播放列表已结束
isPlaying = false;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
mediaPlayer.release();
handler.removeCallbacksAndMessages(null);
}

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package com.mycompany.myapp;
/*2023-8-6首发于无忧论坛作者无忧2011阿星无忧879792799整理修改*/
/*此源码无恶意代码且简单需要编译才能成apk 仅十几k 只需读存储权限编译器有的会带病毒不建议新手使用*/
import android.app.Activity;
import android.os.Bundle;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Build;
import android.os.Handler;
import android.os.Message;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Toast;
import android.app.*;
import android.os.*;
import android.widget.*;
import java.util.*;
import android.content.*;
import java.text.*;
import java.io.*;
import android.view.View.OnClickListener;
import android.widget.AdapterView.OnItemClickListener;
public class MainActivity extends Activity { //每个APP都有一个默认界面
private MediaPlayer mediaPlayer;
private List<String> audioFiles; //把文件夹的音频排成一个数组
private int currentIndex = 0; //数组的下标
private Handler handler; //多线程貌似没起作用
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); //APP程序入口从此往下执行
setContentView(R.layout.activity_main); //绑定主界面的布局文件
// 初始化MediaPlayer
mediaPlayer = new MediaPlayer();
// 获取音频文件列表
audioFiles = getAudioFiles("/sdcard/NX/"); //在根目录自己新建NX文件夹
// 开始播放
playNextAudio();
}
private List<String> getAudioFiles(String folderPath) { //定义音频文件集合而成数组
List<String> files = new ArrayList<>();
File folder = new File(folderPath);
File[] audioFiles = folder.listFiles(new FilenameFilter() {
@Override
public boolean accept(File dir, String name) {
return name.toLowerCase().endsWith(".mp3"); // 可根据需要修改文件类型筛选文件后缀名
}
});
if (audioFiles != null) {
for (File file : audioFiles) {
files.add(file.getAbsolutePath()); //加入数组中
}
}
return files;
}
private void playNextAudio() {
if (currentIndex >= audioFiles.size()) { //数组下标大于音频总数就返回
// 播放列表已结束
return;
}
String audioFile = audioFiles.get(currentIndex); //逐个提取音频文件
mediaPlayer.reset();
try {
mediaPlayer.setDataSource(audioFile); //把数组中逐个提取音频给播放器
} catch (IOException e) {} catch (IllegalStateException e) {} catch (IllegalArgumentException e) {} catch (SecurityException e) {}
try {
mediaPlayer.prepare(); //播放器准备
} catch (IOException e) {} catch (IllegalStateException e) {}
// mediaPlayer.seekTo(10000);
mediaPlayer.start(); //播放器开始播放
// 复读第10秒到第20秒这个区间的音频
// 随机选择播放时间点
int duration = mediaPlayer.getDuration(); //获取当前音频的总时长
if(duration>60000){ //假如音频时长大于1分钟就往下执行否则就跳到下一音频
Random random = new Random(); //准备随机
int startPos= random.nextInt(duration - 60000); // 播放开始点A 随机时间点不能是最后1分钟防止播放时间太短就结束了
// int startPos = 160000;
int endPos = startPos+10000; //播放结束时间点B 结束时间是开始时间往后10秒
// Try to play three times
try {
repeatAToB(startPos, endPos, 1); //从开始时间到结束时间播放且播放重复一遍
} catch (Exception e) {}
}
else{
currentIndex++; //再把音频数组下标加一位，就是下一个音频文件
playNextAudio(); //再次从playNextAudio处执行
}
// currentIndex++;
// if (currentIndex < audioFiles.size()) {
// // 继续播放下一首音频
// playNextAudio();
// } else {
// // 播放列表已结束
//
// }
//
}
private void repeatAToB(final int startPos, final int endPos, final int repeatTimes)throws Exception { //这个方法就是从随机起始点A播放A播放到结束时间点B
mediaPlayer.seekTo(startPos);
mediaPlayer.start();
CountDownTimer cntr_aCounter = new CountDownTimer(/* millisInFuture= */endPos - startPos, /* countDownInterval= */1000) { //倒计时方法
public void onTick(long millisUntilFinished) {
// DO SOMETHING
}
public void onFinish() {
// Code fire after finish
if((repeatTimes - 1) > 0){
try {
repeatAToB(startPos, endPos, repeatTimes - 1);
} catch (Exception e) {
e.printStackTrace();
}
}else{
mediaPlayer.stop();
currentIndex++;
playNextAudio();
}
}
};
cntr_aCounter.start();
}
@Override
protected void onDestroy() {
super.onDestroy();
mediaPlayer.release();
handler.removeCallbacksAndMessages(null);
}}

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