Android—多媒体(音频播放)

思维导图

音频效果图:

            

音频布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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"
    android:orientation="vertical"
    tools:context="com.example.android27_palymusic.MainActivity">

    <SeekBar
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/seekbar"
        />
    <ImageButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@android:drawable/ic_media_play"
        android:onClick="PlayOrPause"
        />

</LinearLayout>

一、应用程序内音频播放

package com.example.android27_palymusic;

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 SeekBar seekbar;
    private MediaPlayer mediaPlayer;

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

        //给进度条设置滑动监听事件
        seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {

            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                //获取当前进度条的位置
                int currentPosition=seekBar.getProgress();
                //跳转到某个位置进行播放
                mediaPlayer.seekTo(currentPosition);
            }
        });
    }

    public void PlayOrPause(View view){
        ImageButton imageButton= (ImageButton) view;
        if(mediaPlayer==null){ //判断是否是第一次进来
            //应用内音频源
            mediaPlayer = MediaPlayer.create(this, R.raw.a1);
            //获取音乐的最大时长
          int time=mediaPlayer.getDuration();
            //设置进度条的最大值为音乐播放时长
            seekbar.setMax(time);
            //调取开始播放
            mediaPlayer.start();
            //换上暂停图标
            imageButton.setImageResource(android.R.drawable.ic_media_pause);
            //调取线程
            new MyThead().start();
        }else if(mediaPlayer.isPlaying()){ //判断是否正在播放
            //调取暂停播放
            mediaPlayer.pause();
            //换上开始播放图标
            imageButton.setImageResource(android.R.drawable.ic_media_play);
        }else {
            mediaPlayer.start();
            imageButton.setImageResource(android.R.drawable.ic_media_pause);
        }

    }


class MyThead extends Thread{
    @Override
    public void run() {
        super.run();
        while (seekbar.getProgress()<seekbar.getMax()){
            //获取音乐当前播放位置
            int currentPosition=mediaPlayer.getCurrentPosition();
            seekbar.setProgress(currentPosition);

        }
    }
}



}

二、SD卡音频播放

package com.example.android27_palymusic;

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Environment;
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 SeekBar seekbar;
    private MediaPlayer mediaPlayer;

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

        //给进度条设置滑动监听事件
        seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {

            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                //获取当前进度条的位置
                int currentPosition=seekBar.getProgress();
                //跳转到某个位置进行播放
                mediaPlayer.seekTo(currentPosition);
            }
        });
    }

    public void PlayOrPause(View view) throws IOException {
        ImageButton imageButton= (ImageButton) view;
        if(mediaPlayer==null){ //判断是否是第一次进来
            if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){ //判断内存卡是否可用
                String sdPath=Environment.getExternalStorageDirectory().getAbsolutePath();  //获取路径
                mediaPlayer=new MediaPlayer();
                //设置音频流的类型
              mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
                //设置SD卡音频源
                mediaPlayer.setDataSource(this, Uri.parse("file://"+sdPath+"/1473071258817.mp3"));
                //设置异步准备
                mediaPlayer.prepare();
                //获取音乐的最大时长
                int time=mediaPlayer.getDuration();
                //设置进度条的最大值为音乐播放时长
                seekbar.setMax(time);
                //调取开始播放
                mediaPlayer.start();
                //换上暂停图标
                imageButton.setImageResource(android.R.drawable.ic_media_pause);
                //调取线程
                new MyThead().start();
            }
        }else if(mediaPlayer.isPlaying()){ //判断是否正在播放
            //调取暂停播放
            mediaPlayer.pause();
            //换上开始播放图标
            imageButton.setImageResource(android.R.drawable.ic_media_play);
        }else {
            mediaPlayer.start();
            imageButton.setImageResource(android.R.drawable.ic_media_pause);
        }

    }


class MyThead extends Thread{
    @Override
    public void run() {
        super.run();
        while (seekbar.getProgress()<seekbar.getMax()){
            //获取音乐当前播放位置
            int currentPosition=mediaPlayer.getCurrentPosition();
            seekbar.setProgress(currentPosition);

        }
    }
}



}

三、网络音频播放

package com.example.android27_palymusic;

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Environment;
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 SeekBar seekbar;
    private MediaPlayer mediaPlayer;

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

        //给进度条设置滑动监听事件
        seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {

            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                //获取当前进度条的位置
                int currentPosition=seekBar.getProgress();
                //跳转到某个位置进行播放
                mediaPlayer.seekTo(currentPosition);
            }
        });
    }

    public void PlayOrPause(View view) throws IOException {
       final ImageButton imageButton= (ImageButton) view;
        if(mediaPlayer==null){ //判断是否是第一次进来
            if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
                String sdPath=Environment.getExternalStorageDirectory().getAbsolutePath();
                mediaPlayer=new MediaPlayer();
                //设置音频流的类型
              mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
               //设置网络音源
                mediaPlayer.setDataSource(this, Uri.parse("http://192.168.43.210:8080/s8.mp3"));
                mediaPlayer.prepareAsync();
                //设置准备监听
                mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                    @Override
                    public void onPrepared(MediaPlayer mediaPlayer) {
                        //获取音乐的最大时长
                        int time=mediaPlayer.getDuration();
                        //设置进度条的最大值为音乐播放时长
                        seekbar.setMax(time);
                        //调取开始播放
                        mediaPlayer.start();
                        //换上暂停图标
                        imageButton.setImageResource(android.R.drawable.ic_media_pause);
                        //调取线程
                        new MyThead().start();
                    }
                });

            }
        }else if(mediaPlayer.isPlaying()){ //判断是否正在播放
            //调取暂停播放
            mediaPlayer.pause();
            //换上开始播放图标
            imageButton.setImageResource(android.R.drawable.ic_media_play);
        }else {
            mediaPlayer.start();
            imageButton.setImageResource(android.R.drawable.ic_media_pause);
        }

    }


class MyThead extends Thread{
    @Override
    public void run() {
        super.run();
        while (seekbar.getProgress()<seekbar.getMax()){
            //获取音乐当前播放位置
            int currentPosition=mediaPlayer.getCurrentPosition();
            seekbar.setProgress(currentPosition);

        }
    }
}



}