安卓第十七天笔记--简易版本音乐播放器，安卓第十七天

安卓第十七天笔记--简易版本音乐播放器，安卓第十七天

title:简易版本音乐播放器

简易版本音乐播放器

1.布局

<?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"
    android:orientation="vertical"
    android:gravity="center_horizontal">

    <Button
        android:id="@+id/musicList"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:background="#86B2F4"
        android:text="音乐文件列表"
        android:textColor="#fff"
        android:textSize="28sp"/>

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/logo"/>

    <SeekBar
        android:id="@+id/seekBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal">

        <ImageButton
            android:id="@+id/stop"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/stop"/>

        <ImageButton
            android:id="@+id/pre"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/pree"/>

        <ImageButton
            android:id="@+id/play"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/play"/>

        <ImageButton
            android:id="@+id/next"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/next"/>
    </LinearLayout>
</LinearLayout>

2.工具类

/**
 * Created by  刘楠 on 2016-03-05 19:39.
 * 文件过滤器工具类,
 * 用于过滤指定后缀的文件
 */
public class MusicFileNameFilter implements FilenameFilter {

    private String type;

    public MusicFileNameFilter(String type) {
        this.type = type;
    }

    @Override
    public boolean accept(File dir, String filename) {
        return filename.endsWith(type);
    }
}

3.Binder接口

/**
 * Created by  刘楠 on 2016-03-05 20:41.
 */
public interface IMusicPlayerService {
    public void callplay(String path);
    ;
    public  void callStop();

    public boolean callIsPlaying();

    public int callGetgetDuration();

    public int callGetgetCurrentDuration();

    public boolean callMediaIsNull();

    public void callChanageSeek(int position);

    public void callPause();
}
4. service

            /**
         * Created by  刘楠 on 2016-03-05 20:32.
         *
         * Servie音乐播放
         */
        public class MusicPlayerService extends Service {


            private MediaPlayer mediaPlayer;

            private MusicPlayerBinder musicPlayerBinder = new MusicPlayerBinder();

            private class MusicPlayerBinder extends Binder implements IMusicPlayerService {

                public void callplay(String path) {

                    play(path);
                }

                @Override
                public void callStop() {
                    stop();
                }

                @Override
                public boolean callIsPlaying() {
                    return isPlaying();
                }

                @Override
                public int callGetgetDuration() {
                    return getgetDuration();
                }

                @Override
                public int callGetgetCurrentDuration() {
                    return getCurrentDuration();
                }

                @Override
                public boolean callMediaIsNull() {
                    return mediaIsNull();
                }

                @Override
                public void callChanageSeek(int position) {
                    chanageSeek(position);
                }

                @Override
                public void callPause() {
                    pause();
                }

            }

            @Nullable
            @Override
            public IBinder onBind(Intent intent) {

                return musicPlayerBinder;
            }

            /**
             * 初始化
             * @param path
             */
            private void init(String path) {

                if (mediaPlayer == null) {
                    mediaPlayer = new MediaPlayer();
                    reset(path);
                }else{
                    reset(path);