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);
}
}
}
}

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);
}
}
}
}