【发布时间】：2020-06-24 17:59:09
【问题描述】：
我已将 MediaPlayer 设置为播放原始文件夹中的音乐文件列表。这个音乐播放器有暂停和播放按钮。歌曲使用 RecyclerView 列出。
我的挑战是每当我退出活动时，音乐会继续播放而不会自动停止。 请帮助我，我希望音乐播放器在活动关闭时停止。
这是 CustomMusicAdapter
public class CustomMusicAdapter extends RecyclerView.Adapter<MyViewHolder> implements Filterable {
private Context context;
private int layout;
private ArrayList<Music> myArraylist;
private ArrayList<Music> getUserModelListFiltered;
private static MediaPlayer mediaPlayer;
private boolean flag=true;
public CustomMusicAdapter(Context context, int custom_music_row, ArrayList<Music> myArraylist) {
this.context = context;
this.layout = layout;
this.getUserModelListFiltered = myArraylist;
this.myArraylist = myArraylist;
}
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
final View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.custom_music_row, parent, false);
return new MyViewHolder(itemView);
}
@SuppressLint("RecyclerView")
@Override
public void onBindViewHolder(@NonNull final MyViewHolder holder, final int position) {
holder.setIsRecyclable(false);
final Music music = myArraylist.get(position);
holder.mTitle.setText(music.getName());
holder.mDes.setText(music.getSinger());
//Play Music Setup
holder.mImageaplay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (flag){
mediaPlayer=MediaPlayer.create(context,music.getSong());
flag=false;
}
if (mediaPlayer.isPlaying()){
mediaPlayer.pause();
mediaPlayer.start();
holder.mImageaplay.setImageResource(R.drawable.ic_play);
}else {
mediaPlayer.start();
holder. mImageaplay.setImageResource(R.drawable.ic_pause);
}
mediaPlayer.start();
}
});
// stop player
holder.mImageStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (!flag){
mediaPlayer.stop();
mediaPlayer.release();
flag=true;
}
holder.mImageaplay.setImageResource(R.drawable.ic_play);
}
});
}
@Override
public int getItemCount() {
return myArraylist.size();
}
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
FilterResults filterResults = new FilterResults();
if (charSequence == null | charSequence.length() == 0){
filterResults.count = getUserModelListFiltered.size();
filterResults.values = getUserModelListFiltered;
}else {
String searchChr = charSequence.toString().toLowerCase();
List<Music> resultData = new ArrayList<>();
for (Music music: getUserModelListFiltered){
if (music.getName().toLowerCase().contains(searchChr)){
resultData.add(music);
}
}
filterResults.count = resultData.size();
filterResults.values = resultData;
}
return filterResults;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
myArraylist = (ArrayList<Music>) filterResults.values;
notifyDataSetChanged();
}
};
return filter;
}
public class ViewHolder {
TextView textView_SongName, textView_artist;
ImageView imageView_play, imageView_stop;
private View convertview;
LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
public ViewHolder() {
convertview = layoutInflater.inflate(layout, null);
textView_SongName = convertview.findViewById(R.id.textName);
textView_artist = convertview.findViewById(R.id.txtSinger);
imageView_play = convertview.findViewById(R.id.ivPlay);
imageView_stop = convertview.findViewById(R.id.ivStop);
}
}
}这就是我在代码中放置它的方式 对吗？
// stop player
holder.mImageStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (!flag){
mediaPlayer.stop();
mediaPlayer.release();
flag=true;
}
public void onDestroy(){
if( CustomMusicAdapter !=null ){
CustomMusicAdapter.release()
}
}
holder.mImageaplay.setImageResource(R.drawable.ic_play);
}
});Tip1Activity.java
public class Tip1Activity extends AppCompatActivity {
private ArrayList<Music> arrayList;
private CustomMusicAdapter adapter;
private RecyclerView recyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tip1);
Button button1 = (Button)findViewById(R.id.mainButton1);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(Tip1Activity.this, MainActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
Toast.makeText(Tip1Activity.this, "songs!", Toast.LENGTH_SHORT).show();
}
});
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
recyclerView = findViewById(R.id.recyclerViewList);
arrayList = new ArrayList<>();
arrayList.add(new Music("001 Veni, veni, Emmanuel", "SONGS OF WORSHIP", R.raw.veni_emmanuel));
arrayList.add(new Music("002 O come. O come Emmanuel", "SONGS OF WORSHIP", R.raw.o_come_emmanuel));
arrayList.add(new Music("003 Savior of the nations, come", "SONGS OF WORSHIP", R.raw.savior_of_nations));
arrayList.add(new Music("004 On Jordan's bank the Baptist's cry", "SONGS OF WORSHIP", R.raw.on_jordans_bank));
arrayList.add(new Music("005 Lo, he comes", "SONGS OF WORSHIP", R.raw.lo_he_comes));
arrayList.add(new Music("006 O Word that goest forth on high", "SONGS OF WORSHIP", R.raw.o_word_that_goes_forth));
arrayList.add(new Music("007 Wake, awake", "SONGS OF WORSHIP", R.raw.wake_awake));
arrayList.add(new Music("008 Rorate caeli", "SONGS OF WORSHIP", R.raw.rorate_caeli));
arrayList.add(new Music("009 Conditor alme siderum", "SONGS OF WORSHIP", R.raw.conditor_alme_siderum));
arrayList.add(new Music("010 Creator of the stars of night", "SONGS OF WORSHIP", R.raw.creator_of_the_stars));
adapter = new CustomMusicAdapter(this, R.layout.custom_music_row, arrayList);
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setHasFixedSize(false);
}
}
@Override
public void onBackPressed() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Do you want to close Catholic Mass Songs App?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Tip1Activity.this.finish();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_options, menu);
MenuItem menuItem = menu.findItem(R.id.search_view);
SearchView searchView = (SearchView) menuItem.getActionView();
searchView.setMaxWidth(Integer.MAX_VALUE);
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
adapter.getFilter().filter(newText);
return true;
}
});
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()){
case R.id.item1:
Toast.makeText(this, "Settings Selected", Toast.LENGTH_SHORT).show();
startActivity(new Intent(this, Main2Activity.class));
return true;
//do more funtionality here
default:
return super.onOptionsItemSelected(item);
}
}
}代码错误图片
【问题讨论】：
标签： android media-player