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私はこのアプリケーションを作成しています。リスト内の項目をチェックしてボタンをクリックすると、選択した項目が圧縮されます。私の問題は、私が選択した項目の値（ディレクトリパス）を取得し、それをString []配列に入れる必要があることです。私はこれを検索しようとしましたが、混乱しました。私はこのアンドロイドを開発するのが初めてです。私を助けてください。選択したチェックボックスの値を取得してandroidのString []配列に入れる方法
これまで私が行ったこと。
Music.java
public class Music extends AppCompatActivity {
Spinner spinneruse;
ListView listView;
SongAdapter songAdapter;
Button getChoice;
ArrayList<SongInfo> _songs = new ArrayList<SongInfo>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_music);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
listView = (ListView) findViewById(R.id.lv);
getChoice = (Button) findViewById(R.id.btnMusic);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
String selection = MediaStore.Audio.Media.IS_MUSIC + "!=0";
Cursor cursor = getContentResolver().query(uri, null, selection, null, null);
if (cursor != null) {
if (cursor.moveToFirst()) {
do {
String name = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME));
String artist = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));
String url = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA));
SongInfo s = new SongInfo(name, artist, url);
_songs.add(s);
} while (cursor.moveToNext());
}
cursor.close();
songAdapter = new SongAdapter(Music.this, _songs);
}
listView.setAdapter(new SongAdapter(this, _songs));
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
songAdapter.setSelected(position);
}
});
getChoice.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// declare an array for storing the files i.e the path
// of your source files
// first parameter is d files second parameter is zip
// file name
Compress c = new Compress(songs, "/storage/sdcard0/file.zip"); //first parameter is d files second parameter is zip file name
c.zip();
}
});
}//oncreate
static class SongInfo {
public String Songname;
private String Artistname;
private String SongUrl;
private boolean isSelected;
public SongInfo(String songname, String artistname, String songUrl) {
Songname = songname;
Artistname = artistname;
SongUrl = songUrl;
this.isSelected = isSelected;
}
public String getSongname() {
return Songname;
}
public void setSongname(String songname) {
Songname = songname;
}
public String getArtistname() {
return Artistname;
}
public void setArtistname(String artistname) {
Artistname = artistname;
}
public String getSongUrl() {
return SongUrl;
}
public void setSongUrl(String songUrl) {
SongUrl = songUrl;
}
public boolean isSelected() {
return isSelected;
}
public void setSelected(boolean selected) {
isSelected = selected;
}
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
class SongAdapter extends BaseAdapter {
public ArrayList<SongInfo> _songs = new ArrayList<SongInfo>();
private Context context;
LayoutInflater inflater;
public SongAdapter(Context _context, ArrayList<SongInfo> songs) {
this.context = _context;
this._songs = songs;
}
public int getCount() {
return _songs.size();
}
public Object getItem(int position) {
return _songs.get(position);
}
public long getItemId(int position) {
return position;
}
private class ViewHolder {
protected CheckBox checkBox;
private TextView tvSongName;
private TextView tvSongArtist;
}
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.row_songs, null, true);
viewHolder = new ViewHolder();
viewHolder.checkBox = (CheckBox) convertView.findViewById(R.id.checkBox);
viewHolder.tvSongName = (TextView) convertView.findViewById(R.id.tvSongName);
viewHolder.tvSongArtist = (TextView) convertView.findViewById(R.id.tvArtistName);
viewHolder.checkBox.setOnCheckedChangeListener(null);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.tvSongName.setText(_songs.get(position).getSongname());
viewHolder.tvSongArtist.setText(_songs.get(position).getArtistname());
viewHolder.checkBox.setOnCheckedChangeListener(null);
viewHolder.checkBox.setChecked(_songs.get(position).isSelected());
viewHolder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
int getPosition = (Integer) buttonView.getTag(); // Here we get the position that we have set for the checkbox using setTag.
if (_songs.get(getPosition).isSelected()) {
_songs.get(getPosition).setSelected(false);
} else {
_songs.get(getPosition).setSelected(true);
Toast.makeText(context.getApplicationContext(), "position " + position + " " + _songs.get(position).getSongUrl(),
Toast.LENGTH_LONG).show();
Log.e("URL", _songs.get(position).getSongUrl() + " ");
}
}
});
convertView.setTag(R.id.tvSongName, viewHolder.tvSongName);
convertView.setTag(R.id.tvArtistName, viewHolder.tvSongArtist);
convertView.setTag(R.id.checkBox, viewHolder.checkBox);
viewHolder.checkBox.setTag(position); // This line is important.
return convertView;
}
public ArrayList<SongInfo> getAllData() {
return _songs;
}
public void setSelected(int position) {
//Update status of checkbox
SongInfo items = _songs.get(position);
items.setSelected(!items.isSelected());
notifyDataSetChanged();
}
}
}
事前にありがとうございます！ほんとうにありがとう。
助けが必要pls :( – asgardwin7