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这里是我的代码： -如何通过通知按钮控制mediaPlayer？
SongsListActivity.xml： -
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.RemoteViews;
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 NotificationManager notificationManager;
public ImageView ImageD;
public Notification notification;
public Runnable UpdateSongTime;
public int IIII, II, startTime, C_Image, C_Repeat, Repeat_Value = 0, Repeat_N, P_and_P_N;
public String C_Name, C_Rate;
public Handler myHandler = new Handler();
public SeekBar seekBar;
public TextView Current_Time, Duration, NameD, RateD;
public ImageButton Stop;
public Songs song;
public ArrayList<Songs> Song;
public ImageButton P_and_P = null, Repeat = null, Next = null, 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;
if (Repeat_Value == 0) {
showNotification(C_Name, C_Rate, C_Image, R.drawable.ic_play_arrow_white_48dp, R.drawable.ic_repeat_white_48dp);
} else {
showNotification(C_Name, C_Rate, C_Image, R.drawable.ic_play_arrow_white_48dp, R.drawable.ic_repeat_one_white_48dp);
}
P_and_P.setImageResource(R.drawable.ic_play_arrow_white_48dp);
}
}
}
};
public void showNotification(String Name, String Rate, int Image_Source, int PandP, int Repeat) {
RemoteViews remoteview = new RemoteViews(getPackageName(), R.layout.notification_layout);
PendingIntent pi = PendingIntent.getActivity(this, 0, new Intent(this, SongsListActivity.class), 0);
notification = new NotificationCompat.Builder(this)
.setContent(remoteview)
.setPriority(2)
.setTicker(NameD.getText())
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle(NameD.getText())
.setContentText(RateD.getText())
.setContentIntent(pi)
.setAutoCancel(false)
.setCustomBigContentView(remoteview)
.build();
notification.bigContentView = remoteview;
remoteview.setImageViewResource(R.id.Repeat_N, Repeat);
remoteview.setImageViewResource(R.id.P_and_P_N, PandP);
remoteview.setTextViewText(R.id.Name_N, Name);
remoteview.setTextViewText(R.id.Rate_N, Rate);
remoteview.setImageViewResource(R.id.Image_N, Image_Source);
notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
notificationManager.notify(111111, 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);
Repeat_N = R.drawable.ic_repeat_white_48dp;
P_and_P_N = R.drawable.ic_pause_white_48dp;
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));
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);
if (mediaplayer != null) {
if (Repeat_Value == 0) {
showNotification(C_Name, C_Rate, C_Image, R.drawable.ic_play_arrow_white_48dp, R.drawable.ic_repeat_white_48dp);
} else {
showNotification(C_Name, C_Rate, C_Image, R.drawable.ic_play_arrow_white_48dp, 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;
if (Repeat_Value == 0) {
showNotification(C_Name, C_Rate, C_Image, R.drawable.ic_pause_white_48dp, R.drawable.ic_repeat_white_48dp);
} else {
showNotification(C_Name, C_Rate, C_Image, R.drawable.ic_pause_white_48dp, R.drawable.ic_repeat_one_white_48dp);
}
mediaplayer.start();
} else {
P_and_P.setImageResource(R.drawable.ic_play_arrow_white_48dp);
IsPaused = true;
if (Repeat_Value == 0) {
showNotification(C_Name, C_Rate, C_Image, R.drawable.ic_play_arrow_white_48dp, R.drawable.ic_repeat_white_48dp);
} else {
showNotification(C_Name, C_Rate, C_Image, R.drawable.ic_play_arrow_white_48dp, R.drawable.ic_repeat_one_white_48dp);
}
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;
if (Repeat_Value == 0) {
showNotification(C_Name, C_Rate, C_Image, R.drawable.ic_play_arrow_white_48dp, R.drawable.ic_repeat_white_48dp);
} else {
showNotification(C_Name, C_Rate, C_Image, R.drawable.ic_play_arrow_white_48dp, R.drawable.ic_repeat_one_white_48dp);
}
}
}
});
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);
}
}
);
}
public void music_player(int I) {
UpdateSongTime = new Runnable() {
public void run() {
if(mediaplayer != null) {
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();
C_Name = song.getNameOfSong();
C_Image = song.getImage();
C_Rate = song.getDeveloperRate();
C_Repeat = R.drawable.ic_repeat_white_48dp;
P_and_P_N = R.drawable.ic_pause_white_48dp;
//If mediaPlayer is paused.
if (IsPaused) {
P_and_P.setImageResource(R.drawable.ic_pause_white_48dp);
P_and_P_N = 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(C_Name);
RateD.setText(C_Rate);
ImageD.setImageResource(C_Image);
}
//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(C_Name);
RateD.setText(C_Rate);
ImageD.setImageResource(C_Image);
mediaplayer.start();
if (Repeat_Value == 0) {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_white_48dp);
} else {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_one_white_48dp);
}
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);
P_and_P_N = 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;
if (Repeat_Value == 0) {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_white_48dp);
} else {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_one_white_48dp);
}
} 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);
P_and_P_N = R.drawable.ic_play_arrow_white_48dp;
mediaplayer.pause();
IsPaused = true;
if (Repeat_Value == 0) {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_white_48dp);
} else {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_one_white_48dp);
}
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);
P_and_P_N = R.drawable.ic_pause_white_48dp;
IsPaused = false;
if (Repeat_Value == 0) {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_white_48dp);
} else {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_one_white_48dp);
}
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 (Repeat_Value == 0) {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_white_48dp);
} else {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_one_white_48dp);
}
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);
P_and_P_N = 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 (Repeat_Value == 0) {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_white_48dp);
} else {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_one_white_48dp);
}
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;
if (Repeat_Value == 0) {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_white_48dp);
} else {
showNotification(C_Name, C_Rate, C_Image, P_and_P_N, R.drawable.ic_repeat_one_white_48dp);
}
music_player(II);
}
});
}
}
}
@Override
protected void onDestroy() {
super.onDestroy();
if(mediaplayer != null)
{
mediaplayer.release();
mediaplayer = null;
mAudioManager.abandonAudioFocus(mOnAudioFocusChangeListener);
notificationManager.cancelAll();
}
Log.e("Checkup", "onDestroy: working");
}
}
notification_layout.xml： -
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#2196F3">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#2196F3"
android:orientation="horizontal">
<ImageView
android:id="@+id/Image_N"
android:layout_width="100dp"
android:layout_height="100dp"
tools:ignore="ContentDescription" />
<LinearLayout
android:id="@+id/text_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/Name_N"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="bottom"
android:textAppearance="?android:textAppearanceMedium"
android:textColor="@android:color/white"
android:textStyle="bold"
android:maxLength="25"/>
<TextView
android:id="@+id/Rate_N"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="top"
android:textAppearance="?android:textAppearanceMedium"
android:textColor="#F44336" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<ImageButton
android:id="@+id/Repeat_N"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/ic_repeat_white_48dp"
android:background="#2196F3"/>
<ImageButton
android:id="@+id/Previous_N"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/ic_skip_previous_white_48dp"
android:background="#2196F3"/>
<ImageButton
android:id="@+id/P_and_P_N"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/ic_play_arrow_white_48dp"
android:background="#2196F3"/>
<ImageButton
android:id="@+id/Next_N"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/ic_skip_next_white_48dp"
android:background="#2196F3"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
现在我的问题是： -
我应该怎么做，以便当t上的ImageButtons他点击通知然后他们执行他们各自的工作（我看了很多地方获得解决方案，甚至尝试实施它们，但我没有成功）。