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Hier ist mein Code:Wie man eine Aktivität fortsetzt?
package com.justforyou.bestnarutosongs;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.app.NotificationCompat;
import android.util.Log;
import android.view.View;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SeekBar;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.concurrent.TimeUnit;
public class SongsListActivity extends AppCompatActivity
{
public boolean IsPaused = false;
public int Old_Song = -326523;
public TextView NameD;
public ImageView ImageD;
public TextView RateD;
public int II;
public Runnable UpdateSongTime;
public int startTime;
public int IIII;
public Handler myHandler = new Handler();
public SeekBar seekBar;
public TextView Current_Time;
public TextView Duration;
public int Repeat_Value = 0;
public ImageButton Stop;
public Songs song;
public ArrayList<Songs> Song;
public ImageButton P_and_P = null;
public ImageButton Repeat = null;
public ImageButton Next = null;
public ImageButton Previous = null;
private MediaPlayer mediaplayer;
private AudioManager mAudioManager;
private AudioManager.OnAudioFocusChangeListener mOnAudioFocusChangeListener = new AudioManager.OnAudioFocusChangeListener()
{
@Override
public void onAudioFocusChange(int focusChange){
if(focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK || focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT){
mediaplayer.pause();
IsPaused = true;
P_and_P.setImageResource(R.drawable.ic_play_arrow_white_48dp);
}
else if(focusChange == AudioManager.AUDIOFOCUS_GAIN){
mediaplayer.start();
}
else if(focusChange == AudioManager.AUDIOFOCUS_LOSS){
if(mediaplayer != null)
{
mediaplayer.pause();
IsPaused = true;
P_and_P.setImageResource(R.drawable.ic_play_arrow_white_48dp);
}
}
}
};
public void showNotification() {
PendingIntent pi = PendingIntent.getActivity(this, 0, new Intent(this, SongsListActivity.class), 0);
Notification notification = new NotificationCompat.Builder(this)
.setTicker(NameD.getText())
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle(NameD.getText())
.setContentText(RateD.getText())
.setContentIntent(pi)
.setAutoCancel(false)
.build();
NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
notificationManager.notify(0, notification);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_songs_list);
Repeat = (ImageButton) findViewById(R.id.Repeat);
Next = (ImageButton) findViewById(R.id.Next);
Previous = (ImageButton) findViewById(R.id.Previous);
NameD = (TextView) findViewById(R.id.NameD);
ImageD = (ImageView) findViewById(R.id.ImageD);
RateD = (TextView) findViewById(R.id.RateD);
P_and_P = (ImageButton) findViewById(R.id.P_and_P);
Stop = (ImageButton) findViewById(R.id.Stop);
Duration = (TextView) findViewById(R.id.Duration);
Current_Time = (TextView) findViewById(R.id.Current_Time);
seekBar = (SeekBar) findViewById(R.id.SeekBar);
seekBar.setClickable(false);
mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
Song = new ArrayList<>();
Song.add(new Songs("Alone", "Rate: 4.0", R.raw.alone, R.drawable.alone));
Song.add(new Songs("Anger", "Rate: 4.5", R.raw.anger, R.drawable.anger));
Song.add(new Songs("Bad Situation", "Rate: 3.6", R.raw.bad_situation, R.drawable.badsitu));
Song.add(new Songs("Beni Soubi", "Rate: 4.0", R.raw.beni_soubi, R.drawable.beni));
Song.add(new Songs("Confronting", "Rate: 3.2", R.raw.confronting, R.drawable.confronting));
Song.add(new Songs("Daylight Of Konoha", "Rate: 4.7", R.raw.d_o_k, R.drawable.d_o_k));
Song.add(new Songs("Dark Clouds", "Rate: 3.1", R.raw.dark_clouds, R.drawable.darkc));
Song.add(new Songs("Dept. To The Front Lines", "Rate: 5.0", R.raw.departure_to_the_front_lines, R.drawable.d_t_t_f_l));
Song.add(new Songs("Despair", "Rate: 3.6", R.raw.despair, R.drawable.despair));
Song.add(new Songs("Dokushinjutsu(Mt. Neoboku)", "Rate: 2.9", R.raw.dokushinjutsu, R.drawable.dokushin));
Song.add(new Songs("Emergence Of Talent", "Rate: 4.6", R.raw.emergence_of_talents, R.drawable.e_o_t));
Song.add(new Songs("Evening", "Rate: 3.4", R.raw.evening, R.drawable.evening));
Song.add(new Songs("Experienced Many Battles", "Rate: 4.0", R.raw.experienced_many_battles, R.drawable.e_m_b));
Song.add(new Songs("Gekiha", "Rate: 4.0", R.raw.gekiha, R.drawable.gekiha));
Song.add(new Songs("Genshi(Vision)", "Rate: 2.9", R.raw.genshi, R.drawable.genshi));
Song.add(new Songs("Girei(Pain's Theme)", "Rate: 4.5", R.raw.girei, R.drawable.girei));
Song.add(new Songs("Glued State", "Rate: 3.5", R.raw.glued_state, R.drawable.glue));
Song.add(new Songs("Guren", "Rate: 3.5", R.raw.guren, R.drawable.guren));
Song.add(new Songs("Heaven Shaking Event", "Rate: 5.0", R.raw.heaven_shaking_event, R.drawable.h_s_e));
Song.add(new Songs("Hidan", "Rate: 3.0", R.raw.hidan, R.drawable.hidan));
Song.add(new Songs("Hidden Will To Fight", "Rate: 2.1", R.raw.hidden_will_to_fight, R.drawable.h_w_t_f));
Song.add(new Songs("Himoji", "Rate: 5.0", R.raw.himoji, R.drawable.himoji));
Song.add(new Songs("Hinata and Neji", "Rate: 5.0", R.raw.hinata_vs_neji, R.drawable.hi_vs_ne));
Song.add(new Songs("Homecoming", "Rate: 3.5", R.raw.homecoming, R.drawable.homecoming));
Song.add(new Songs("I said I'm Naruto", "Rate: 5.0", R.raw.i_said_i_am_naruto, R.drawable.i_s_i_a_n));
Song.add(new Songs("Jinchuuriki", "Rate: 2.5", R.raw.jinchuuriki, R.drawable.jinchu));
Song.add(new Songs("Kakuzu", "Rate: 5.0", R.raw.kakuzu, R.drawable.kakuzu));
Song.add(new Songs("Kokuten", "Rate: 5.0", R.raw.kokuten, R.drawable.kokuten));
Song.add(new Songs("Kouen", "Rate: 5.0", R.raw.kouen, R.drawable.kouen));
Song.add(new Songs("Nankou Furaku", "Rate: 5.0", R.raw.nankou_furaku, R.drawable.n_furu));
Song.add(new Songs("Naruto Main Theme", "Rate: 5.0", R.raw.naruto_main_theme, R.drawable.narutomt));
Song.add(new Songs("Orochimaru's Theme", "Rate: 3.8", R.raw.orochimaru_theme, R.drawable.orochi));
Song.add(new Songs("Ranpatsu", "Rate: 5.0", R.raw.ranpatsu, R.drawable.ranpatsu));
Song.add(new Songs("Risking It All", "Rate: 5.0+", R.raw.risking_it_all, R.drawable.r_i_a));
Song.add(new Songs("Saika", "Rate: 4.9", R.raw.saika, R.drawable.saika));
Song.add(new Songs("Sasuke's Destiny", "Rate: 5.0", R.raw.sasuke_destiny, R.drawable.sasudesti));
Song.add(new Songs("Senya(Itachi's Theme)", "Rate: 5.0", R.raw.senya, R.drawable.senya));
Song.add(new Songs("Shirotsumekusa", "Rate: 3.0", R.raw.shirotsumekusa, R.drawable.shirot));
Song.add(new Songs("Shouryuu", "Rate: 5.0", R.raw.shouryuu, R.drawable.shouryuu));
Song.add(new Songs("Shippuuden", "Rate: 5.0", R.raw.shippuuden, R.drawable.shippuuden));
Song.add(new Songs("Turn Over", "Rate: 4.6", R.raw.turn_over, R.drawable.turn_over));
SongsAdapter SongAdapter = new SongsAdapter(this, Song, R.color.Main_Color);
ListView listView = (ListView) findViewById(R.id.list_Col);
listView.setAdapter(SongAdapter);
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
int ProgressChanged = 0;
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
ProgressChanged = i;
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
mediaplayer.seekTo(ProgressChanged);
}
});
Repeat.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (Repeat_Value == 0) {
Repeat_Value = 1;
Repeat.setImageResource(R.drawable.ic_repeat_one_white_48dp);
} else {
Repeat_Value = 0;
Repeat.setImageResource(R.drawable.ic_repeat_white_48dp);
}
}
});
Next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (mediaplayer != null) {
mediaplayer.release();
mediaplayer = null;
if (II == (Song.size() - 1)) {
II = 0;
} else {
II += 1;
}
music_player(II);
}
}
}
);
Previous.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (mediaplayer != null) {
mediaplayer.release();
mediaplayer = null;
if (II == 0) {
II = (Song.size() - 1);
} else {
II -= 1;
}
music_player(II);
}
}
}
);
P_and_P.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (mediaplayer != null) {
if (!mediaplayer.isPlaying() || IsPaused) {
P_and_P.setImageResource(R.drawable.ic_pause_white_48dp);
IsPaused = false;
mediaplayer.start();
} else {
P_and_P.setImageResource(R.drawable.ic_play_arrow_white_48dp);
IsPaused = true;
mediaplayer.pause();
}
}
}
});
Stop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (mediaplayer != null) {
P_and_P.setImageResource(R.drawable.ic_play_arrow_white_48dp);
mediaplayer.pause();
mediaplayer.seekTo(0);
IsPaused = true;
}
}
});
listView.setOnItemClickListener
(new AdapterView.OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l)
{
Log.v("1", "Just upon entering onItemClick");
music_player(i);
showNotification();
}
}
);
}
public void music_player(int I) {
UpdateSongTime = new Runnable() {
public void run() {
startTime = mediaplayer.getCurrentPosition();
if ((TimeUnit.MILLISECONDS.toSeconds((long) startTime)) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) startTime)) < 10) {
Current_Time.setText(String.format("0%d:0%d",
TimeUnit.MILLISECONDS.toMinutes((long) startTime),
TimeUnit.MILLISECONDS.toSeconds((long) startTime) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.
toMinutes((long) startTime)))
);
} else {
Current_Time.setText(String.format("0%d:%d",
TimeUnit.MILLISECONDS.toMinutes((long) startTime),
TimeUnit.MILLISECONDS.toSeconds((long) startTime) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.
toMinutes((long) startTime))));
}
seekBar.setProgress((int) startTime);
myHandler.postDelayed(this, 100);
}
};
II = I;
IIII = II;
int Current_Song;
song = Song.get(I);
//If mediaPlayer is not used before, this will make oldsong as present song.
if (Old_Song == -326523) {
Old_Song = song.getSong();
}
Current_Song = song.getSong();
//If mediaPlayer is paused.
if (IsPaused) {
P_and_P.setImageResource(R.drawable.ic_pause_white_48dp);
//If the song paused is same as the new song.
if (Current_Song == Old_Song) {
mediaplayer.start();
NameD.setText(song.getNameOfSong());
RateD.setText(song.getDeveloperRate());
ImageD.setImageResource(song.getImage());
}
//If the song Paused is not the new song.
else {
if (mediaplayer != null) {
mediaplayer.release();
mediaplayer = null;
}
int result = mAudioManager.requestAudioFocus(mOnAudioFocusChangeListener, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
mediaplayer = mediaplayer.create(SongsListActivity.this, song.getSong());
seekBar.setMax(mediaplayer.getDuration());
Old_Song = song.getSong();
NameD.setText(song.getNameOfSong());
RateD.setText(song.getDeveloperRate());
ImageD.setImageResource(song.getImage());
mediaplayer.start();
if ((TimeUnit.MILLISECONDS.toSeconds((long) mediaplayer.getDuration()) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) mediaplayer.getDuration()))) < 10) {
Duration.setText(String.format("0%d:0%d",
TimeUnit.MILLISECONDS.toMinutes((long) mediaplayer.getDuration()),
TimeUnit.MILLISECONDS.toSeconds((long) mediaplayer.getDuration()) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) mediaplayer.getDuration()))));
} else {
Duration.setText(String.format("0%d:%d",
TimeUnit.MILLISECONDS.toMinutes((long) mediaplayer.getDuration()),
TimeUnit.MILLISECONDS.toSeconds((long) mediaplayer.getDuration()) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) mediaplayer.getDuration()))));
}
seekBar.setProgress((int) startTime);
myHandler.postDelayed(UpdateSongTime, 100);
mediaplayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mediaPlayer) {
P_and_P.setImageResource(R.drawable.ic_play_arrow_white_48dp);
IsPaused = true;
if (mediaplayer != null) {
mediaplayer.release();
mediaplayer = null;
}
if (Repeat_Value == 0) {
if (II == (Song.size() - 1)) {
II = 0;
} else {
II += 1;
}
} else {
II = IIII;
}
IsPaused = false;
music_player(II);
}
});
}
}
IsPaused = false;
} else if (mediaplayer != null) {
//If mediaPlayer is already Playing a song.
if (mediaplayer.isPlaying()) {
P_and_P.setImageResource(R.drawable.ic_play_arrow_white_48dp);
mediaplayer.pause();
IsPaused = true;
if (Current_Song != Old_Song) {
NameD.setText(song.getNameOfSong());
RateD.setText(song.getDeveloperRate());
ImageD.setImageResource(song.getImage());
if (mediaplayer != null) {
mediaplayer.release();
mediaplayer = null;
}
P_and_P.setImageResource(R.drawable.ic_pause_white_48dp);
IsPaused = false;
music_player(II);
}
}
}
//If mediaPlayer is used for first time and if mediaPlayer is neither paused
else {
if (mediaplayer != null) {
mediaplayer.release();
mediaplayer = null;
}
int result = mAudioManager.requestAudioFocus(mOnAudioFocusChangeListener, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) {
mediaplayer = mediaplayer.create(SongsListActivity.this, song.getSong());
seekBar.setMax(mediaplayer.getDuration());
Old_Song = song.getSong();
NameD.setText(song.getNameOfSong());
RateD.setText(song.getDeveloperRate());
ImageD.setImageResource(song.getImage());
mediaplayer.start();
if ((TimeUnit.MILLISECONDS.toSeconds((long) mediaplayer.getDuration()) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) mediaplayer.getDuration()))) < 10) {
Duration.setText(String.format("0%d:0%d",
TimeUnit.MILLISECONDS.toMinutes((long) mediaplayer.getDuration()),
TimeUnit.MILLISECONDS.toSeconds((long) mediaplayer.getDuration()) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) mediaplayer.getDuration()))));
} else {
Duration.setText(String.format("0%d:%d",
TimeUnit.MILLISECONDS.toMinutes((long) mediaplayer.getDuration()),
TimeUnit.MILLISECONDS.toSeconds((long) mediaplayer.getDuration()) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes((long) mediaplayer.getDuration()))));
}
seekBar.setProgress((int) startTime);
myHandler.postDelayed(UpdateSongTime, 100);
P_and_P.setImageResource(R.drawable.ic_pause_white_48dp);
mediaplayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mediaPlayer) {
P_and_P.setImageResource(R.drawable.ic_play_arrow_white_48dp);
IsPaused = true;
if (mediaplayer != null) {
mediaplayer.release();
mediaplayer = null;
}
if (Repeat_Value == 0) {
if (II == (Song.size() - 1)) {
II = 0;
} else {
II += 1;
}
} else {
II = IIII;
}
IsPaused = false;
music_player(II);
}
});
}
}
}
@Override
protected void onDestroy() {
super.onDestroy();
if(mediaplayer != null)
{
mediaplayer.release();
mediaplayer = null;
mAudioManager.abandonAudioFocus(mOnAudioFocusChangeListener);
}
}
}
Nun, was ich will, ist, dass, wenn die Benachrichtigung geklickt wird, wird die SongsListActivity gestartet, aber es neu gestartet wird.
siehe, zuerst beginnt der Song zu spielen, dann wird die Suchleiste aktualisiert, Bild, Name, usw. des Songs wird aktualisiert.
Jetzt nehme ich zurück Knopf aus der Navigationsleiste drücken, und dann ohne die Aktivität zu zerstören, ich öffne die App wieder, dann wird diese Aktivität nicht zurückgesetzt (das heißt, der Name, Bild, usw. des Songs werden angezeigt, wie sie waren, bevor sie die Aktivität verlassen haben), aber wenn ich denselben Vorgang wiederhole, aber nur mit dem Unterschied, dass ich die Aktivität öffne, indem ich auf die erzeugte Benachrichtigung klicke; dann wird die gesamte Aktivität zurückgesetzt (das heißt, die Aktivität sieht so aus, als hätte sie gerade erst begonnen).
Was soll ich tun, damit die Aktivität nicht zurückgesetzt wird, stattdessen geht es weiter?
Mögliches Duplikat von [Benachrichtigung klicken: Aktivität bereits geöffnet] (http://stackoverflow.com/questions/12043671/notification-click-activity-already-open) – Bryan
Eine Frage nach der anderen bitte. Und lassen Sie das "bitte nicht runter" –