app/src/main/java/com/example/multimedia/AudioPlayerActivity.java - master - ap1k/MultimediaJavaAndroid

app/src/main/java/com/example/multimedia/AudioPlayerActivity.java
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11 май 2025, 13:58
11 май 2025, 13:584ffd117
package com.example.multimedia;

import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.view.View;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import com.google.android.material.floatingactionbutton.FloatingActionButton;

public class AudioPlayerActivity extends AppCompatActivity {

    private TextView tvTrackTitle, tvCurrentTime, tvTotalTime;
    private SeekBar seekBarAudio;
    private FloatingActionButton fabPlayAudio, fabPauseAudio, fabStopAudio;
    private ImageView ivTrackCover;
    
    private MediaPlayer mediaPlayer;
    private Handler handler = new Handler(Looper.getMainLooper());
    private Runnable runnable;
    
    // Sample tracks (can be replaced with actual tracks)
    private final int[] trackResources = {
            R.raw.track1
    };
    
    private final String[] trackTitles = {
            "Summer Breeze"
    };
    
    private final int[] trackCovers = {
            R.drawable.cover1
    };
    
    private int currentTrackIndex = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_audio_player);
        
        // Initialize views
        tvTrackTitle = findViewById(R.id.tvTrackTitle);
        tvCurrentTime = findViewById(R.id.tvCurrentTime);
        tvTotalTime = findViewById(R.id.tvTotalTime);
        seekBarAudio = findViewById(R.id.seekBarAudio);
        fabPlayAudio = findViewById(R.id.fabPlayAudio);
        fabPauseAudio = findViewById(R.id.fabPauseAudio);
        fabStopAudio = findViewById(R.id.fabStopAudio);
        ivTrackCover = findViewById(R.id.ivTrackCover);
        
        // Setup the media player
        setupMediaPlayer();
        
        // Setup the track info
        updateTrackInfo();
        
        // Setup button click listeners
        fabPlayAudio.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                playAudio();
            }
        });
        
        fabPauseAudio.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                pauseAudio();
            }
        });
        
        fabStopAudio.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                stopAudio();
            }
        });
        
        // Setup SeekBar change listener
        seekBarAudio.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                if (mediaPlayer != null && fromUser) {
                    mediaPlayer.seekTo(progress);
                }
            }
            
            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {}
            
            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {}
        });
    }
    
    /**
     * Setup the MediaPlayer with the current track
     */
    private void setupMediaPlayer() {
        // Release if already exists
        if (mediaPlayer != null) {
            mediaPlayer.release();
        }
        
        try {
            // Create new MediaPlayer
            mediaPlayer = MediaPlayer.create(this, trackResources[currentTrackIndex]);
            
            if (mediaPlayer == null) {
                Toast.makeText(this, "Не удалось загрузить аудиофайл", Toast.LENGTH_SHORT).show();
                finish();
                return;
            }
            
            // Setup the total time display
            int totalDuration = mediaPlayer.getDuration();
            seekBarAudio.setMax(totalDuration);
            tvTotalTime.setText(formatTime(totalDuration));
            
            // Setup completion listener
            mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                @Override
                public void onCompletion(MediaPlayer mp) {
                    stopAudio();
                }
            });
        } catch (Exception e) {
            Toast.makeText(this, "Ошибка при инициализации аудиоплеера: " + e.getMessage(), Toast.LENGTH_SHORT).show();
            finish();
        }
    }
    
    /**
     * Play the audio track
     */
    private void playAudio() {
        if (mediaPlayer != null && !mediaPlayer.isPlaying()) {
            try {
                mediaPlayer.start();
                updateSeekBar();
            } catch (Exception e) {
                Toast.makeText(this, "Ошибка воспроизведения: " + e.getMessage(), Toast.LENGTH_SHORT).show();
            }
        }
    }
    
    /**
     * Pause the audio track
     */
    private void pauseAudio() {
        if (mediaPlayer != null && mediaPlayer.isPlaying()) {
            try {
                mediaPlayer.pause();
                handler.removeCallbacks(runnable);
            } catch (Exception e) {
                Toast.makeText(this, "Ошибка приостановки: " + e.getMessage(), Toast.LENGTH_SHORT).show();
            }
        }
    }
    
    /**
     * Stop the audio track
     */
    private void stopAudio() {
        if (mediaPlayer != null) {
            try {
                mediaPlayer.stop();
                mediaPlayer.reset();
                setupMediaPlayer();
                handler.removeCallbacks(runnable);
                seekBarAudio.setProgress(0);
                tvCurrentTime.setText("0:00");
            } catch (Exception e) {
                Toast.makeText(this, "Ошибка остановки: " + e.getMessage(), Toast.LENGTH_SHORT).show();
            }
        }
    }
    
    /**
     * Update the SeekBar position and current time text
     */
    private void updateSeekBar() {
        if (mediaPlayer != null) {
            try {
                // Get current position
                int currentPosition = mediaPlayer.getCurrentPosition();
                
                // Update SeekBar and current time text
                seekBarAudio.setProgress(currentPosition);
                tvCurrentTime.setText(formatTime(currentPosition));
                
                // Continue updating
                runnable = new Runnable() {
                    @Override
                    public void run() {
                        updateSeekBar();
                    }
                };
                
                handler.postDelayed(runnable, 1000);
            } catch (Exception e) {
                // Игнорируем ошибку
            }
        }
    }
    
    /**
     * Format milliseconds to m:ss format
     */
    private String formatTime(int milliseconds) {
        int seconds = milliseconds / 1000;
        int minutes = seconds / 60;
        seconds = seconds % 60;
        return String.format("%d:%02d", minutes, seconds);
    }
    
    /**
     * Update the track title and cover image
     */
    private void updateTrackInfo() {
        tvTrackTitle.setText(trackTitles[currentTrackIndex]);
        ivTrackCover.setImageResource(trackCovers[currentTrackIndex]);
    }
    
    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mediaPlayer != null) {
            handler.removeCallbacks(runnable);
            mediaPlayer.release();
            mediaPlayer = null;
        }
    }
}