دانلود و اجرای موزیک در ویو پیجر

طبق راهنمایی آقای حاج حسینی کد رو به این صورت تغییر دادم و کار کرد.

     public void play(View view) {
        position = myPager.getCurrentItem();
        if (new File(G.DIR_FINAL + "/" + mAudio[position]).exists()) {
            mp = MediaPlayer.create(G.context, Uri.parse(G.DIR_FINAL + "/" + mAudio[position]));
            Toast.makeText(G.context, R.string.playing, Toast.LENGTH_LONG).show();

            if (mp != null && !mp.isPlaying()) {
                mp.start();
                finalTime = mp.getDuration();
                startTime = mp.getCurrentPosition();
                if (oneTimeOnly == 0) {
                    seekbar.setMax((int) finalTime);
                    oneTimeOnly = 1;

                }
                endTimeField.setText(String.format("%d min, %d sec",
                        TimeUnit.MILLISECONDS.toSeconds((long) finalTime) / 60,
                        TimeUnit.MILLISECONDS.toSeconds((long) finalTime) % 60)
                        );
                startTimeField.setText(String.format("%d min, %d sec",
                        TimeUnit.MILLISECONDS.toSeconds((long) startTime) / 60,
                        TimeUnit.MILLISECONDS.toSeconds((long) startTime) % 60)
                        );
                seekbar.setProgress((int) startTime);
                myHandler.postDelayed(UpdateSongTime, 100);
                pauseButton.setEnabled(true);
                playButton.setEnabled(false);
            }
        }
        else {
            filename = mAudio[myPager.getCurrentItem()];
            d = new AlertDialog.Builder(this)
                    .setTitle(R.string.download)
                    .setMessage(R.string.message)
                    .setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() {

                        @Override
                        public void onClick(DialogInterface arg0, int arg1) {

                            Toast.makeText(G.context, R.string.downloading, Toast.LENGTH_LONG).show();
                            rlPrg.setVisibility(View.VISIBLE);
                            playButton.setEnabled(false);
                            seekbar.setVisibility(View.GONE);

                            Thread thread = new Thread(new Runnable() {

                                @Override
                                public void run() {
                                    startDownload("http://آدرس پوشه حاوی موزیک ها " + filename, G.DIR_FINAL +
									"/" + filename, prgDownloadProgress, txtPercent);
                                }
                            });
                            thread.start();
                        }

                    })
                    .setNegativeButton(R.string.no, new DialogInterface.OnClickListener() {

                        public void onClick(DialogInterface dialog, int which) {

                        }
                    })

                    .setIcon(R.drawable.download)
                    .show();

            Resources res = G.context.getResources();
            TextView messageView = (TextView) ((Dialog) d).findViewById(android.R.id.message);
            messageView.setTextColor(res.getColor(R.color.white));
            final int titleId = res.getIdentifier("alertTitle", "id", "android");
            final View title = ((Dialog) d).findViewById(titleId);
            if (title != null) {
                ((TextView) title).setTextColor(res.getColor(R.color.white));
            }
            final int titleDividerId = res.getIdentifier("titleDivider", "id", "android");
            final View titleDivider = ((Dialog) d).findViewById(titleDividerId);
            if (titleDivider != null) {
                titleDivider.setBackgroundColor(res.getColor(R.color.white));
            }

        }
    }

این هم دستور دانلود که از راهنمایی دوستمون ahmadvb توی این لینک بود استفاده کردم

     private void startDownload(final String downloadURL, final String filePath
                               , final ProgressBar prgDownloadProgress
                               , final TextView txtPercent) {
        ModuleDownloader downloadRequest = new ModuleDownloader();
        OnProgressDownloadListener progressListener = new OnProgressDownloadListener() {

            @Override
            public void onProgressDownload(final int percent, final int downloadedSize, final int fileSize) {

                G.HANDLER.post(new Runnable() {

                    @Override
                    public void run() {
                        Drawable draw = getResources().getDrawable(R.drawable.costum_progress);
                        prgDownloadProgress.setProgressDrawable(draw);
                        prgDownloadProgress.setProgress(percent);
                        txtPercent.setText(percent + " % ");
                    }
                });
            }
        };
        OnDownloadCompleteListener completeListener = new OnDownloadCompleteListener() {

            @Override
            public void OnDownloadComplete(final String filepath) {
                G.HANDLER.post(new Runnable() {

                    @Override
                    public void run() {
                        rlPrg.setVisibility(View.GONE);
                        pauseButton.setEnabled(false);
                        playButton.setEnabled(true);
                        seekbar.setVisibility(View.VISIBLE);
                        play(playButton);//اینجا بعد از اینکه دانلود تمام شد موزیک پخش میشه
                    }
                });
            }

        };
        downloadRequest.downloadPath(downloadURL)
                .filepath(filePath)
                .simulate(true)
                .progressListener(progressListener)
                .completeListener(completeListener);
        downloadRequest.download();
    }

 package com.allbaloo.app.Music;

import java.io.File;
import java.util.concurrent.TimeUnit;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;


public class ActivityPager extends FragmentActivity {

    public TextView         startTimeField, endTimeField;
    private MediaPlayer     mp;
    private double          startTime    = 0;
    private double          finalTime    = 0;
    private Handler         myHandler    = new Handler();
    private int             forwardTime  = 20000;
    private int             backwardTime = 20000;
    private SeekBar         seekbar;
    public ImageButton      playButton;
    private ImageButton     pauseButton;
    public static int       oneTimeOnly  = 0;
    public String           content;
    Button                  btnPrev, btnNext;
    public static ViewPager myPager;
    int                     position;
    static String           filename;
    ImageView               btndwnload;
    private int             previousState, currentState;
    private ProgressBar     prgDownloadProgress;
    private TextView        txtPercent;
    private RelativeLayout  rlPrg;
    private Object          d;
    private int pos;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.firstplay);

      
        final Animation anim1 = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.enter_from_right);
        final Animation anim2 = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.enter_from_left);

        prgDownloadProgress = (ProgressBar) findViewById(R.id.prgDownloadProgress);
        txtPercent = (TextView) findViewById(R.id.txtPercent);
        rlPrg = (RelativeLayout) findViewById(R.id.rlPrg);

        startTimeField = (TextView) findViewById(R.id.textView1);
        endTimeField = (TextView) findViewById(R.id.textView2);
        seekbar = (SeekBar) findViewById(R.id.seekBar1);
        playButton = (ImageButton) findViewById(R.id.imageButton1);
        pauseButton = (ImageButton) findViewById(R.id.imageButton2);
        btnPrev = (Button) findViewById(R.id.btnPrev);
        btnNext = (Button) findViewById(R.id.btnNext);
        seekbar.setClickable(false);
        pauseButton.setEnabled(false);

        Intent i = getIntent();
        position = i.getExtras().getInt("page");
        filename = mAudio[position];

        if (position == 0) {
            btnPrev.setVisibility(View.INVISIBLE);
        }
        else
            btnPrev.setVisibility(View.VISIBLE);

        if (new File(G.DIR_FINAL + "/" + mAudio[position]).exists()) {
            mp = MediaPlayer.create(G.context, Uri.parse(G.DIR_FINAL + "/" + mAudio[position]));
            
        }
        myPager = (ViewPager) findViewById(R.id.mypager);
        MyPagerAdapter adapter = new MyPagerAdapter(this, getSupportFragmentManager());

        myPager.setAdapter(adapter);

        myPager.setCurrentItem(position);

        myPager.setOnPageChangeListener(new OnPageChangeListener() {

            @Override
            public void onPageSelected(int pos) {
                if (pos == 0) {
                    btnPrev.setVisibility(View.INVISIBLE);
                }
                else {
                    btnPrev.setVisibility(View.VISIBLE);
                }
                if (mp != null && mp.isPlaying()) {
                    mp.stop();
                    playButton.setEnabled(true);
                }
                if (new File(G.DIR_FINAL + "/" + mAudio[pos]).exists()) {
                    mp = MediaPlayer.create(G.context, Uri.parse(G.DIR_FINAL + "/" + mAudio[pos]));
                    play(playButton);
                }
                
                oneTimeOnly = 0;
                seekbar.setProgress(0);
               
            }


            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {}


            @Override
            public void onPageScrollStateChanged(int state) {}
        });
    }


    public void play(View view) {
        position = myPager.getCurrentItem();
        if (new File(G.DIR_FINAL + "/" + mAudio[position]).exists()) {
            mp = MediaPlayer.create(G.context, Uri.parse(G.DIR_FINAL + "/" + mAudio[position]));
            Toast.makeText(G.context, R.string.playing, Toast.LENGTH_LONG).show();

            if (mp != null && !mp.isPlaying()) {
                mp.start();
                finalTime = mp.getDuration();
                startTime = mp.getCurrentPosition();
                if (oneTimeOnly == 0) {
                    seekbar.setMax((int) finalTime);
                    oneTimeOnly = 1;

                }
                endTimeField.setText(String.format("%d min, %d sec",
                        TimeUnit.MILLISECONDS.toSeconds((long) finalTime) / 60,
                        TimeUnit.MILLISECONDS.toSeconds((long) finalTime) % 60)
                        );
                startTimeField.setText(String.format("%d min, %d sec",
                        TimeUnit.MILLISECONDS.toSeconds((long) startTime) / 60,
                        TimeUnit.MILLISECONDS.toSeconds((long) startTime) % 60)
                        );
                seekbar.setProgress((int) startTime);
                myHandler.postDelayed(UpdateSongTime, 100);
                pauseButton.setEnabled(true);
                playButton.setEnabled(false);
            }
        }
        else {
            filename = mAudio[myPager.getCurrentItem()];
            d = new AlertDialog.Builder(this)
                    .setTitle(R.string.download)
                    .setMessage(R.string.message)
                    .setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() {

                        @Override
                        public void onClick(DialogInterface arg0, int arg1) {

                            Toast.makeText(G.context, R.string.downloading, Toast.LENGTH_LONG).show();
                            rlPrg.setVisibility(View.VISIBLE);
                            playButton.setEnabled(false);
                            seekbar.setVisibility(View.GONE);

                            Thread thread = new Thread(new Runnable() {

                                @Override
                                public void run() {
                                    startDownload("http://آدرس پوشه حاوی موزیک ها " + filename, G.DIR_FINAL +
									"/" + filename, prgDownloadProgress, txtPercent);
                                }
                            });
                            thread.start();
                        }

                    })
                    .setNegativeButton(R.string.no, new DialogInterface.OnClickListener() {

                        public void onClick(DialogInterface dialog, int which) {

                        }
                    })

                    .setIcon(R.drawable.download)
                    .show();

            }

        }
    }


    private void startDownload(final String downloadURL, final String filePath
                               , final ProgressBar prgDownloadProgress
                               , final TextView txtPercent) {
        ModuleDownloader downloadRequest = new ModuleDownloader();
        OnProgressDownloadListener progressListener = new OnProgressDownloadListener() {

            @Override
            public void onProgressDownload(final int percent, final int downloadedSize, final int fileSize) {

                G.HANDLER.post(new Runnable() {

                    @Override
                    public void run() {
                        Drawable draw = getResources().getDrawable(R.drawable.costum_progress);
                        prgDownloadProgress.setProgressDrawable(draw);
                        prgDownloadProgress.setProgress(percent);
                        txtPercent.setText(percent + " % ");
                    }
                });
            }
        };
        OnDownloadCompleteListener completeListener = new OnDownloadCompleteListener() {

            @Override
            public void OnDownloadComplete(final String filepath) {
                G.HANDLER.post(new Runnable() {

                    @Override
                    public void run() {
                        rlPrg.setVisibility(View.GONE);
                        pauseButton.setEnabled(false);
                        playButton.setEnabled(true);
                        seekbar.setVisibility(View.VISIBLE);
                        play(playButton);
                    }
                });
            }

        };
        downloadRequest.downloadPath(downloadURL)
                .filepath(filePath)
                .simulate(true)
                .progressListener(progressListener)
                .completeListener(completeListener);
        downloadRequest.download();
    }

    private Runnable UpdateSongTime = new Runnable() {

                                        @Override
                                        public void run() {
                                            if (mp != null && mp.isPlaying()) {
                                                startTime = mp.getCurrentPosition();
                                                startTimeField.setText(String.format("%d min, %d sec",
                                                        TimeUnit.MILLISECONDS.toSeconds((long) startTime) / 60,
                                                        TimeUnit.MILLISECONDS.toSeconds((long) startTime) % 60)
                                                        );
                                                seekbar.setProgress((int) startTime);
                                                myHandler.postDelayed(this, 100);
                                            }
                                        }
                                    };


    public void pause(View view) {

        mp.pause();
        pauseButton.setEnabled(false);
        playButton.setEnabled(true);
    }


    public void forward(View view) {
        int temp = (int) startTime;
        if ((temp + forwardTime) <= finalTime) {
            startTime = startTime + forwardTime;
            if (mp != null)
                mp.seekTo((int) startTime);
        }
        else {}

    }


    public void rewind(View view) {
        int temp = (int) startTime;
        if ((temp - backwardTime) > 0) {
            startTime = startTime - backwardTime;
            if (mp != null)
                mp.seekTo((int) startTime);
        }
        else {}

    }


    @Override
    protected void onPause() {
        super.onPause();
        try {
            if (mp != null && mp.isPlaying()) {
                mp.stop();
                mp.release();
                myHandler.removeCallbacksAndMessages(null);
            }
        }
        catch (Exception e) {}
    }


    @Override
    protected void onResume() {
        super.onResume();

    }


    @Override
    public void onBackPressed()
    {
        super.onBackPressed();
        try {
            if (mp != null && mp.isPlaying()) {
                mp.stop();
                mp.release();
                myHandler.removeCallbacksAndMessages(null);
            }
        }
        catch (Exception e) {}
        oneTimeOnly = 0;
        finish();
    
    }

    static String[] mAudio = {
                           "audio-0.mp3",
                           "audio-1.mp3",
                           "audio-2.mp3",
                           "audio-3.mp3",
                           "audio-4.mp3",
                           "audio-5.mp3",
                           "audio-6.mp3",
                           "audio-7.mp3",
                           "audio-8.mp3",
                           "audio-9.mp3",
                           "audio-10.mp3",
                           "audio-11.mp3",
                           "audio-12.mp3",
                           "audio-13.mp3",
                           "audio-14.mp3",
                           "audio-15.mp3",
                           "audio-16.mp3",
                           "audio-17.mp3"
                           };


    private int getItem(int i) {
        return myPager.getCurrentItem() + i;
    }
}