エミュレーターでプロジェクトを実行しようとしています。SDカードに曲をプッシュしてから再実行するまでは正常に機能していました。最初の試行では、画面が空白になり、曲は再生されましたが、再試行した後、まったく応答がありませんでした。最初はスペース不足が原因だと思ったので、SDカードのサイズを100Mbから200Mbに増やしました。しかし、まだ応答はありません。誰でも助けてください。また、logcatは問題ないようでした。そしてしばらくすると、エミュレーターはアプリが応答していないと言います。
尋ねられたコード：
public class AndroidBuildingMusicPlayerActivity extends Activity implements OnCompletionListener, SeekBar.OnSeekBarChangeListener {
class AskGenreDialog {
private String songTitle = "";
private int id;
EditText AskGenre;
View view;
public void setSongTitle(String songTitle){
this.songTitle = songTitle;
}
public void setId(int id){
this.id = id;
}
public void onCreateDialog(){
AlertDialog.Builder builder = new AlertDialog.Builder(AndroidBuildingMusicPlayerActivity.this);
LayoutInflater inflator = (LayoutInflater)AndroidBuildingMusicPlayerActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflator.inflate(R.layout.ask_genre, null);
AskGenre = (EditText) view.findViewById(R.id.genre);
builder.setView(view);
builder.setTitle("Genre Not Found").setMessage(songTitle);
builder.setPositiveButton("Save", new OnClickListener(){
@Override
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
String genre = AskGenre.getText().toString();
int i = handler.setGenreForId(genre,id);
Log.d("Ans:", "" + id);
}
});
builder.setNegativeButton("Don't Know", new OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
// create alert dialog
AlertDialog alertDialog = builder.create();
// show it
alertDialog.show();
}
}
class VolumeSeekBar{
AudioManager manager = (AudioManager) AndroidBuildingMusicPlayerActivity.this.getSystemService(Context.AUDIO_SERVICE);;
SeekBar seekBar;
View view;
public SeekBar getSeekBar(){
return this.seekBar;
}
public AudioManager getAudioManager(){
return this.manager;
}
public void onCreateDialog(){
AlertDialog.Builder builder = new AlertDialog.Builder(AndroidBuildingMusicPlayerActivity.this);
LayoutInflater inflator = (LayoutInflater)AndroidBuildingMusicPlayerActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflator.inflate(R.layout.volume, null);
seekBar = (SeekBar) view.findViewById(R.id.volSeekBar);
builder.setView(view);
builder.setTitle("Volume Control");
//get the audio manager
int maxVolume = manager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
seekBar.setMax(maxVolume);
int curVolume = manager.getStreamVolume(AudioManager.STREAM_MUSIC);
seekBar.setProgress(curVolume);
seekBar.setKeyProgressIncrement(1);
seekBar.setProgress(manager.getStreamVolume(AudioManager.STREAM_MUSIC));
seekBar.setProgressDrawable(getResources().getDrawable(R.drawable.volume_seekbar_filled));
seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
manager.setStreamVolume(AudioManager.STREAM_MUSIC, progress, 0);
seekBar.setProgressDrawable(getResources().getDrawable(R.drawable.volume_seekbar_filled));
}
});
// create alert dialog
AlertDialog alertDialog = builder.create();
// show it
alertDialog.show();
}
}
ToggleButton playPause;
Button rewind, forward;
ToggleButton moodButton;
ToggleButton volume;
private ImageButton btnPlaylist;
private ToggleButton repeat;
private SeekBar songProgressBar;
private TextView songTitleLabel;
private TextView songCurrentDurationLabel;
private TextView songTotalDurationLabel;
// Media Player
private MediaPlayer mp;
// Handler to update UI timer, progress bar etc,.
private Handler mHandler = new Handler();;
private SongsManager songManager;
private Utilities utils;
private int currentSongIndex = 0;
private boolean isShuffle = false;
private boolean isRepeat = false;
private ArrayList<Song> songsList = new ArrayList<Song>();
private DatabaseHandler handler = new DatabaseHandler(this);
int version = 0;
boolean sortCalled = true;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// All player buttons
btnPlaylist = (ImageButton) findViewById(R.id.btnPlaylist);
moodButton = (ToggleButton) findViewById(R.id.moodButton);
repeat = (ToggleButton) findViewById(R.id.repeat);
volume = (ToggleButton) findViewById(R.id.volume);
playPause = (ToggleButton) findViewById(R.id.PlayAndPauseButton);
rewind = (Button) findViewById(R.id.rewind);
forward = (Button) findViewById(R.id.forward);
songProgressBar = (SeekBar) findViewById(R.id.songProgressBar);
songTitleLabel = (TextView) findViewById(R.id.songTitle);
songCurrentDurationLabel = (TextView) findViewById(R.id.songCurrentDurationLabel);
songTotalDurationLabel = (TextView) findViewById(R.id.songTotalDurationLabel);
// Mediaplayer
mp = new MediaPlayer();
songManager = new SongsManager();
utils = new Utilities();
// Listeners
songProgressBar.setOnSeekBarChangeListener(this); // Important
mp.setOnCompletionListener(this); // Important
// Getting all songs list
songsList = songManager.getPlayList();
//final ArrayList<Song> backUp = new ArrayList<Song>(songsList);
//handler.onUpgrade(handler.getReadableDatabase(), version , version + 1);
version++;
ArrayList<Song> songsFromDatabase = new ArrayList<Song>();
songsFromDatabase = handler.getAllSongs();
if(songsFromDatabase.size() == 0){
feedDatabase(songsList);
}
else if(songsFromDatabase.size() != songsList.size()){
feedDatabase(songsList, songsFromDatabase);
}
songsList = getPlaylist();
checkForGenre(songsList);
// By default play first song
playSong(0);
/**
* Play button click event
* plays a song and changes button to pause image
* pauses a song and changes button to play image
* */
playPause.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// check for already playing
if (playPause.isChecked()) {
playPause.setBackgroundDrawable(getResources().getDrawable(R.drawable.play));
mp.pause();
} else {
playPause.setBackgroundDrawable(getResources().getDrawable(R.drawable.pause));
mp.start();
// startPlayProgressUpdater();
}
}
});
volume.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(volume.isChecked()){
volume.setBackgroundDrawable(getResources().getDrawable(R.drawable.volume_button));
VolumeSeekBar ob = new VolumeSeekBar();
ob.onCreateDialog();
}
else{
volume.setBackgroundDrawable(getResources().getDrawable(R.drawable.volume_button_disabled));
}
}
});
/**
* Next button click event
* Plays next song by taking currentSongIndex + 1
* */
forward.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// check if next song is there or not
if(currentSongIndex < (songsList.size() - 1)){
playSong(currentSongIndex + 1);
currentSongIndex = currentSongIndex + 1;
}else{
// play first song
playSong(0);
currentSongIndex = 0;
}
}
});
/**
* Back button click event
* Plays previous song by currentSongIndex - 1
* */
rewind.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(currentSongIndex > 0){
playSong(currentSongIndex - 1);
currentSongIndex = currentSongIndex - 1;
}else{
// play last song
playSong(songsList.size() - 1);
currentSongIndex = songsList.size() - 1;
}
}
});
/**
* Button Click event for Repeat button
* Enables repeat flag to true
* */
repeat.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(repeat.isChecked()){
isRepeat = true;
repeat.setBackgroundDrawable(getResources().getDrawable(R.drawable.object_rotate_left_checked));
}else{
// make repeat to true
isRepeat = false;
repeat.setBackgroundDrawable(getResources().getDrawable(R.drawable.object_rotate_left));
}
}
});
/**
* Button Click event for Shuffle button
* Enables shuffle flag to true
* */
/* btnShuffle.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
if(isShuffle){
isShuffle = false;
Toast.makeText(getApplicationContext(), "Shuffle is OFF", Toast.LENGTH_SHORT).show();
btnShuffle.setImageResource(R.drawable.btn_shuffle);
}else{
// make repeat to true
isShuffle= true;
Toast.makeText(getApplicationContext(), "Shuffle is ON", Toast.LENGTH_SHORT).show();
// make shuffle to false
isRepeat = false;
// btnShuffle.setImageResource(R.drawable.btn_shuffle_focused);
btnRepeat.setImageResource(R.drawable.btn_repeat);
}
}
});*/
/**
* Button Click event for Play list click event
* Launches list activity which displays list of songs
* */
btnPlaylist.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent i = new Intent(getApplicationContext(), PlayListActivity.class);
i.putExtra("sortCalled", sortCalled);
startActivityForResult(i, 100);
}
});
}
/**
* Receiving song index from playlist view
* and play the song
* */
@Override
protected void onActivityResult(int requestCode,
int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == 100){
currentSongIndex = data.getExtras().getInt("songIndex");
sortCalled = data.getExtras().getBoolean("sortCalled");
// play selected song
playSong(currentSongIndex);
}
}
/**
* Function to play a song
* @param songIndex - index of song
* */
public void playSong(int songIndex){
songsList = getPlaylist();
// Play song
try {
mp.reset();
mp.setDataSource(songsList.get(songIndex).getSongPath());
mp.prepare();
mp.start();
// Displaying Song title
String songTitle = songsList.get(songIndex).getSongTitle();
songTitleLabel.setText(songTitle);
// Changing Button Image to pause image
playPause.setBackgroundResource(R.drawable.pause);
// set Progress bar values
songProgressBar.setProgress(0);
songProgressBar.setMax(100);
// Updating progress bar
updateProgressBar();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Update timer on seekbar
* */
public void updateProgressBar() {
mHandler.postDelayed(mUpdateTimeTask, 100);
}
/**
* Background Runnable thread
* */
private Runnable mUpdateTimeTask = new Runnable() {
public void run() {
long totalDuration = mp.getDuration();
long currentDuration = mp.getCurrentPosition();
// Displaying Total Duration time
songTotalDurationLabel.setText(""+utils.milliSecondsToTimer(totalDuration));
// Displaying time completed playing
songCurrentDurationLabel.setText(""+utils.milliSecondsToTimer(currentDuration));
// Updating progress bar
int progress = (int)(utils.getProgressPercentage(currentDuration, totalDuration));
//Log.d("Progress", ""+progress);
songProgressBar.setProgress(progress);
// Running this thread after 100 milliseconds
mHandler.postDelayed(this, 100);
}
};
/**
*
* */
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromTouch) {
}
/**
* When user starts moving the progress handler
* */
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// remove message Handler from updating progress bar
mHandler.removeCallbacks(mUpdateTimeTask);
}
/**
* When user stops moving the progress hanlder
* */
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
mHandler.removeCallbacks(mUpdateTimeTask);
int totalDuration = mp.getDuration();
int currentPosition = utils.progressToTimer(seekBar.getProgress(), totalDuration);
// forward or backward to certain seconds
mp.seekTo(currentPosition);
// update timer progress again
updateProgressBar();
}
/**
* On Song Playing completed
* if repeat is ON play same song again
* if shuffle is ON play random song
* */
@Override
public void onCompletion(MediaPlayer arg0) {
// check for repeat is ON or OFF
if(isRepeat){
// repeat is on play same song again
playSong(currentSongIndex);
} else if(isShuffle){
// shuffle is on - play a random song
Random rand = new Random();
currentSongIndex = rand.nextInt((songsList.size() - 1) - 0 + 1) + 0;
playSong(currentSongIndex);
} else{
// no repeat or shuffle ON - play next song
if(currentSongIndex < (songsList.size() - 1)){
playSong(currentSongIndex + 1);
currentSongIndex = currentSongIndex + 1;
}else{
// play first song
playSong(0);
currentSongIndex = 0;
}
}
}
@Override
public void onDestroy(){
super.onDestroy();
mp.release();
}
public void checkForGenre(ArrayList<Song> songsList){
ArrayList<Song> temp = new ArrayList<Song>();
temp = handler.getAllSongAfterSorting();
for(int i = 0; i < temp.size(); i++){
if("unknown".compareToIgnoreCase(temp.get(i).getGenre()) == 0){
AskGenreDialog ask = new AskGenreDialog();
ask.setSongTitle("The Genre for the song " + songsList.get(i).getSongTitle()+
" is unknown. Do You wish to change it?");
int id = handler.getIdForSong(songsList.get(i));
if(id != -1)
ask.setId(id);
ask.onCreateDialog();
}
}
}
public void feedDatabase(ArrayList<Song> songsList){
for(int i =0; i < songsList.size(); i++){
//for(int j = 0; j < songsListFromDatabase.size(); j++){
// if(songs)
Log.d("Insert:", "inserting...");
handler.addSong(songsList.get(i));
String song = "ID" + songsList.get(i).getId() + "SongName:" + songsList.get(i).getSongTitle();
Log.d("Name:" , song);
//}
}
}
private void feedDatabase(ArrayList<Song> songsList,
ArrayList<Song> songsFromDatabase) {
// TODO Auto-generated method stub
for(int i = 0; i < songsList.size(); i++){
for(int j = 0; j < songsFromDatabase.size(); j++){
boolean flag = true;
if(songsList.get(i).getSongTitle().compareToIgnoreCase(songsFromDatabase.get(j).getSongTitle()) == 0){
flag = false;
}
if(flag == true){
handler.addSong(songsList.get(i));
}
}
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
//if one of the volume keys were pressed
if(keyCode == KeyEvent.KEYCODE_VOLUME_DOWN || keyCode == KeyEvent.KEYCODE_VOLUME_UP)
{
VolumeSeekBar ob = new VolumeSeekBar();
//change the seek bar progress indicator position
ob.getSeekBar().setProgress(ob.getAudioManager().getStreamVolume(AudioManager.STREAM_MUSIC));
}
//propagate the key event
return super.onKeyDown(keyCode, event);
}
ArrayList<Song> getPlaylist(){
ArrayList<Song> allSongs = new ArrayList<Song>();
allSongs = handler.getAllSongAfterSorting();
return allSongs;
}
DatabaseHandler getHandler(){
return this.handler;
}
}