安卓如何解决java。lang.Stackoverflowerr？
我有java。运行应用程序时发生lang.StackOverflower错误。我想我用的东西太多了还是怎么了？ 这是错误（看起来是无穷大）
Process: com.ashtim.yulduzlari, PID: 14548
java.lang.StackOverflowError
at java.util.HashMap.doubleCapacity(HashMap.java:589)
at java.util.HashMap.put(HashMap.java:419)
at 安卓x.arch.core.internal.FastSafeIterableMap.putIfAbsent(FastSafeIterableMap.java:50)
at 安卓x.lifecycle.LifecycleRegistry.addObserver(LifecycleRegistry.java:175)
at 安卓x.activity.ComponentActivity.<init>(ComponentActivity.java:230)
at 安卓x.fragment.app.FragmentActivity.<init>(FragmentActivity.java:103)
at 安卓x.appcompat.app.AppCompatActivity.<init>(AppCompatActivity.java:94)
at com.ashtim.yulduzlari.MainActivity.<init>(MainActivity.java:14)
at com.ashtim.yulduzlari.SongActivity.<init>(SongActivity.java:23)
at com.ashtim.yulduzlari.MainActivity.<init>(MainActivity.java:16)
at com.ashtim.yulduzlari.SongActivity.<init>(SongActivity.java:23)
at com.ashtim.yulduzlari.MainActivity.<init>(MainActivity.java:16)
. . . . . . . . . . . . . . . A lot of the same error . . . . . .
at com.ashtim.yulduzlari.SongActivity.<init>(SongActivity.java:23)
at com.ashtim.yulduzlari.MainActivity.<init>(MainActivity.java:16)
at com.ashtim.yulduzlari.SongActivity.<init>(SongActivity.java:23)
at com.ashtim.yulduzlari.MainActivity.<init>(MainActivity.ja
2021-08-16 16:37:12.496 26798-26798/? E/AppsCustomizePagedView: info.activityInfo.name = com.keniu.security.main.AddDesktopShortcutActivity
这是我的主要活动。java文件： 第16行：final MediaPlayer mp=new SongActivity（）。getMp（）
package com.ashtim.yulduzlari;
public class MainActivity extends AppCompatActivity {
final MediaPlayer mp = new SongActivity().getMp();
List<Song> songs = new ArrayList<>();
Song playingSong;
RecyclerView recyclerView;
SongAdapter adapter;
public static boolean isPlaying, repeat, repeatOne, shuffle;
@Override
protected void onCreate (Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initSongs();
initBooleans();
recyclerView = findViewById(R.id.recyclerView);
adapter = new SongAdapter(songs);
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
adapter.setOnItemClickListener(position -> {
play(songs.get(position));
isPlaying = true;
});
}
void initSongs () {
...
}
void initBooleans () {
isPlaying = false;
repeat = false;
repeatOne = false;
shuffle = false;
}
public void setPlayingSong (Song playingSong) {
this.playingSong = playingSong;
}
public Song getPlayingSong () {
return playingSong;
}
public List<Song> getSongs () {
return songs;
}
void play(Song s){
playingSong = s;
Intent i = new Intent(this, SongActivity.class);
i.putExtra("img", s.getImgId());
i.putExtra("name", s.getName());
i.putExtra("artist", s.getArtist());
i.putExtra("duration", s.getDuration());
i.putExtra("song", s.getMusicId());
startActivity(i);
}
}
这是我的歌曲活动。java文件： 第23行：MainActivity ma=新的MainActivity（）
package com.ashtim.yulduzlari;
public class SongActivity extends AppCompatActivity {
MainActivity ma = new MainActivity();
MediaPlayer mp;
List<Song> songs;
String name, artist, duration;
int songId, imgId;
boolean repeatOff, repeatList, repeatOne, shuffleSongs;
SeekBar seekBar;
TextView textName, textArtist, textDuration, textProgressTime;
ImageView imgArtisToolbar, repeat, previous, play, next, shuffle;
CircleImageView imgArtistMain;
@Override
protected void onCreate (Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_song);
getData();
initViews();
setViews();
setBooleans();
}
void play (int position) {
mp = MediaPlayer.create(this, songs.get(position).getMusicId());
shuffle.setOnClickListener(v -> {
shuffleSongs = ! shuffleSongs;
if (repeatOne = true) {
repeatOne = false;
repeatOff = true;
repeat.setImageResource(R.drawable.repeat_off);
} else if (repeatList) {
repeatList = false;
repeatOff = true;
repeat.setImageResource(R.drawable.repeat_off);
}
});
repeat.setOnClickListener(v -> {
if (shuffleSongs = false) {
if (repeatOff) {
repeatList = true;
repeatOff = repeatOne = false;
mp.setLooping(false);
repeat.setImageResource(R.drawable.repeat_on);
} else if (repeatList) {
repeatOne = true;
repeatList = repeatOff = false;
repeat.setImageResource(R.drawable.repeat_one);
} else if (repeatOne) {
repeatOff = true;
repeatOne = repeatList = false;
mp.setLooping(true);
repeat.setImageResource(R.drawable.repeat_off);
}
} else {
Toast.makeText(this, "\"Aralashtirish\"ni o'chiring", Toast.LENGTH_SHORT).show();
}
});
mp.setOnCompletionListener(mp -> {
if (!mp.isLooping() && songs.get(position + 1) != null) {
mp = MediaPlayer.create(this, songs.get(position + 1).getMusicId());
ma.setPlayingSong(songs.get(position + 1));
textName.setText(ma.getPlayingSong().getName());
textArtist.setText(ma.getPlayingSong().getArtist());
textDuration.setText(ma.getPlayingSong().getDuration());
imgArtisToolbar.setImageResource(ma.getPlayingSong().getImgId());
imgArtistMain.setImageResource(ma.getPlayingSong().getImgId());
mp.start();
} else if (shuffleSongs == true){
Random r = new Random();
int randomPos = r.nextInt(songs.size() - 1);
mp = MediaPlayer.create(this, songs.get(randomPos).getMusicId());
ma.setPlayingSong(songs.get(randomPos));
textName.setText(ma.getPlayingSong().getName());
textArtist.setText(ma.getPlayingSong().getArtist());
textDuration.setText(ma.getPlayingSong().getDuration());
imgArtisToolbar.setImageResource(ma.getPlayingSong().getImgId());
imgArtistMain.setImageResource(ma.getPlayingSong().getImgId());
mp.start();
} else if (songs.get(position + 1) == null) {
if (repeatList == true) {
mp = MediaPlayer.create(this, songs.get(0).getMusicId());
ma.setPlayingSong(songs.get(0));
textName.setText(ma.getPlayingSong().getName());
textArtist.setText(ma.getPlayingSong().getArtist());
textDuration.setText(ma.getPlayingSong().getDuration());
imgArtisToolbar.setImageResource(ma.getPlayingSong().getImgId());
imgArtistMain.setImageResource(ma.getPlayingSong().getImgId());
mp.start();
}
}
});
previous.setOnClickListener(v -> playPrev(this, songs, mp, ma, position - 1));
playPause(mp);
next.setOnClickListener(v -> playNext(this, songs, mp, ma, position + 1));
setSeekBarProgress();
if (mp != null) {
mp.start();
}
}
void playPrev (Context c, List<Song> songs, MediaPlayer mp, MainActivity ma, int prevSongPos) {
if (prevSongPos == - 1) {
Toast.makeText(c, "Birinchi musiqa", Toast.LENGTH_SHORT).show();
} else {
if (mp != null && ! (mp.getCurrentPosition() > 10000)) {
mp.stop();
mp.release();
mp = MediaPlayer.create(this, songs.get(prevSongPos).getMusicId());
ma.setPlayingSong(songs.get(prevSongPos));
setSeekBarProgress();
mp.start();
} else if (mp != null) {
mp.seekTo(0);
}
}
}
public void playNext (Context c, List<Song> songs, MediaPlayer mp, MainActivity ma, int nextSongPos) {
if (nextSongPos == songs.size() + 1) {
Toast.makeText(c, "Oxirgi musiqa", Toast.LENGTH_SHORT).show();
} else {
if (mp != null) {
mp.stop();
mp.release();
mp = MediaPlayer.create(this, songs.get(nextSongPos).getMusicId());
ma.setPlayingSong(songs.get(nextSongPos));
setSeekBarProgress();
mp.start();
}
}
}
public void playPause (MediaPlayer mp) {
if (mp != null && mp.isPlaying()) {
mp.stop();
play.setImageResource(R.drawable.play);
} else {
if (mp != null) {
mp.start();
play.setImageResource(R.drawable.pause);
}
}
}
void setSeekBarProgress () {
seekBar.setMax(mp.getDuration() / 1000);
Timer t = new Timer();
t.scheduleAtFixedRate(new TimerTask() {
@Override
public void run () {
if (mp != null) {
int currentTime = mp.getCurrentPosition() / 1000;
seekBar.setProgress(currentTime);
}
}
}, 0, 1000);
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged (SeekBar seekBar, int progress, boolean fromUser) {
if (mp != null && fromUser) {
mp.seekTo(progress * 1000);
seekBar.setProgress(progress * 1000);
}
}
@Override
public void onStartTrackingTouch (SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch (SeekBar seekBar) {
}
});
}
void initViews () {
seekBar = findViewById(R.id.seekbar);
textName = findViewById(R.id.songName);
textArtist = findViewById(R.id.artistName);
textProgressTime = findViewById(R.id.progress_time);
textDuration = findViewById(R.id.duration);
imgArtisToolbar = findViewById(R.id.img_activity_toolbar);
repeat = findViewById(R.id.repeat);
previous = findViewById(R.id.previous);
play = findViewById(R.id.play);
next = findViewById(R.id.next);
shuffle = findViewById(R.id.shuffle);
imgArtistMain = findViewById(R.id.img_activity);
}
void setViews () {
songs = ma.getSongs();
textName.setText(name);
textArtist.setText(artist);
textDuration.setText(duration);
imgArtisToolbar.setImageResource(imgId);
imgArtistMain.setImageResource(imgId);
}
void setBooleans () {
repeatOff = true;
repeatList = false;
repeatOne = false;
shuffleSongs = false;
}
void getData () {
Intent i = getIntent();
name = i.getStringExtra("name");
artist = i.getStringExtra("artist");
duration = i.getStringExtra("duration");
songId = i.getIntExtra("song", 0);
imgId = i.getIntExtra("img", 0);
}
public MediaPlayer getMp () {
return mp;
}
}
# 1 楼答案
MainActivity创建SongActivitySongActivity创建MainActivity并重复上一行这种递归是无限的，会导致堆栈溢出