_RingtonePickerDialog.java

package org.holoeverywhere.preference;

import org.holoeverywhere.LayoutInflater;
import org.holoeverywhere.app.AlertDialog;
import org.holoeverywhere.app.AlertDialog.Builder;
import org.holoeverywhere.app.Dialog;
import org.holoeverywhere.internal.AlertController.AlertParams.OnPrepareListViewListener;
import org.holoeverywhere.widget.ListView;

import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.content.DialogInterface.OnClickListener;
import android.content.DialogInterface.OnDismissListener;
import android.content.Intent;
import android.database.Cursor;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Handler;
import android.provider.MediaStore.MediaColumns;
import android.provider.Settings;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.TextView;

public class _RingtonePickerDialog implements OnItemSelectedListener, Runnable,
        OnClickListener, OnPrepareListViewListener, OnCancelListener,
        OnDismissListener {
    public static interface RingtonePickerListener {
        public void onRingtonePickerCanceled();

        public void onRingtonePickerChanged(Uri uri);
    }

    private static final int DELAY_MS_SELECTION_PLAYED = 300;
    private AlertDialog.Builder builder;
    private int clickedPos = -1, defaultRingtonePos = -1,
            sampleRingtonePos = -1, silentPos = -1, staticItemCount;
    private Context context;
    private Cursor cursor;
    private Ringtone defaultRingtone;
    private AlertDialog dialog;
    private Uri existingUri;
    private Handler handler;
    private boolean hasDefaultItem, hasSilentItem;
    private final Intent intent;
    private final RingtonePickerListener listener;
    private RingtoneManager ringtoneManager;
    private Uri uriForDefaultItem;

    public _RingtonePickerDialog(Context context, Intent intent,
            RingtonePickerListener listener) {
        this.context = context;
        this.intent = intent;
        this.listener = listener;
    }

    private int addDefaultRingtoneItem(ListView listView) {
        return addStaticItem(listView, R.string.ringtone_default);
    }

    private int addSilentItem(ListView listView) {
        return addStaticItem(listView, R.string.ringtone_silent);
    }

    private int addStaticItem(ListView listView, int textResId) {
        TextView textView = (TextView) LayoutInflater.inflate(context,
                R.layout.select_dialog_singlechoice_holo, listView, false);
        textView.setText(textResId);
        listView.addHeaderView(textView);
        staticItemCount++;
        return listView.getHeaderViewsCount() - 1;
    }

    public _RingtonePickerDialog cancel() {
        if (dialog != null) {
            dialog.cancel();
        }
        return this;
    }

    public _RingtonePickerDialog create() {
        if (dialog != null) {
            return this;
        }
        handler = new Handler();
        hasDefaultItem = intent.getBooleanExtra(
                RingtoneManager.EXTRA_RINGTONE_SHOW_DEFAULT, true);
        uriForDefaultItem = intent
                .getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_DEFAULT_URI);
        if (uriForDefaultItem == null) {
            uriForDefaultItem = Settings.System.DEFAULT_RINGTONE_URI;
        }
        hasSilentItem = intent.getBooleanExtra(
                RingtoneManager.EXTRA_RINGTONE_SHOW_SILENT, true);
        ringtoneManager = new RingtoneManager(context);
        final boolean includeDrm = intent.getBooleanExtra(
                RingtoneManager.EXTRA_RINGTONE_INCLUDE_DRM, true);
        ringtoneManager.setIncludeDrm(includeDrm);
        int types = intent.getIntExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, -1);
        if (types != -1) {
            ringtoneManager.setType(types);
        }
        cursor = ringtoneManager.getCursor();
        if (context instanceof Activity) {
            ((Activity) context).setVolumeControlStream(ringtoneManager
                    .inferStreamType());
        }
        existingUri = intent
                .getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI);
        builder = new AlertDialog.Builder(context);
        dialog = onCreateDialog(builder);
        return this;
    }

    public _RingtonePickerDialog dismiss() {
        if (dialog != null) {
            dialog.dismiss();
        }
        return this;
    }

    private CharSequence getDialogTitle() {
        if (intent.hasExtra(RingtoneManager.EXTRA_RINGTONE_TITLE)) {
            return intent
                    .getCharSequenceExtra(RingtoneManager.EXTRA_RINGTONE_TITLE);
        } else {
            return context.getText(R.string.ringtone_picker_title);
        }
    }

    private int getListPosition(int ringtoneManagerPos) {
        if (ringtoneManagerPos < 0) {
            return ringtoneManagerPos;
        }
        return ringtoneManagerPos + staticItemCount;
    }

    private int getRingtoneManagerPosition(int listPos) {
        return listPos - staticItemCount;
    }

    public Dialog makeDialog() {
        create();
        return dialog;
    }

    @Override
    public void onCancel(DialogInterface dialog) {
        stopAnyPlayingRingtone();
    }

    @Override
    public void onClick(DialogInterface dialog, int which) {
        boolean positiveResult = which == DialogInterface.BUTTON_POSITIVE;
        ringtoneManager.stopPreviousRingtone();
        if (positiveResult) {
            Uri uri = null;
            if (clickedPos == defaultRingtonePos) {
                uri = uriForDefaultItem;
            } else if (clickedPos == silentPos) {
                uri = null;
            } else {
                uri = ringtoneManager
                        .getRingtoneUri(getRingtoneManagerPosition(clickedPos));
            }
            if (listener != null) {
                listener.onRingtonePickerChanged(uri);
            }
        } else {
            if (listener != null) {
                listener.onRingtonePickerCanceled();
            }
        }
    }

    private AlertDialog onCreateDialog(Builder builder) {
        builder.setPositiveButton(android.R.string.ok, this);
        builder.setNegativeButton(android.R.string.cancel, this);
        builder.setOnPrepareListViewListener(this);
        builder.setSingleChoiceItems(cursor, -1, MediaColumns.TITLE,
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        clickedPos = which;
                        playRingtone(which, 0);
                    }
                });
        builder.setTitle(getDialogTitle());
        builder.setOnCancelListener(this);
        AlertDialog dialog = builder.create();
        dialog.setOnDismissListener(this);
        return dialog;
    }

    @Override
    public void onDismiss(DialogInterface dialog) {
        stopAnyPlayingRingtone();
    }

    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position,
            long id) {
        playRingtone(position, _RingtonePickerDialog.DELAY_MS_SELECTION_PLAYED);
    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {
    }

    @Override
    public void onPrepareListView(ListView listView) {
        if (hasDefaultItem) {
            defaultRingtonePos = addDefaultRingtoneItem(listView);
            if (RingtoneManager.isDefault(existingUri)) {
                clickedPos = defaultRingtonePos;
            }
        }
        if (hasSilentItem) {
            silentPos = addSilentItem(listView);
            if (existingUri == null) {
                clickedPos = silentPos;
            }
        }
        if (clickedPos == -1) {
            clickedPos = getListPosition(ringtoneManager
                    .getRingtonePosition(existingUri));
        }
        builder.setCheckedItem(clickedPos);
    }

    private void playRingtone(int position, int delayMs) {
        handler.removeCallbacks(this);
        sampleRingtonePos = position;
        handler.postDelayed(this, delayMs);
    }

    @Override
    public void run() {
        if (sampleRingtonePos == silentPos) {
            ringtoneManager.stopPreviousRingtone();
            return;
        }
        if (defaultRingtone != null && defaultRingtone.isPlaying()) {
            defaultRingtone.stop();
            defaultRingtone = null;
        }
        Ringtone ringtone;
        if (sampleRingtonePos == defaultRingtonePos) {
            if (defaultRingtone == null) {
                defaultRingtone = RingtoneManager.getRingtone(context,
                        uriForDefaultItem);
            }
            ringtone = defaultRingtone;
            ringtoneManager.stopPreviousRingtone();
        } else {
            ringtone = ringtoneManager
                    .getRingtone(getRingtoneManagerPosition(sampleRingtonePos));
        }
        if (ringtone != null) {
            ringtone.play();
        }
    }

    private void stopAnyPlayingRingtone() {
        if (defaultRingtone != null && defaultRingtone.isPlaying()) {
            defaultRingtone.stop();
        }
        if (ringtoneManager != null) {
            ringtoneManager.stopPreviousRingtone();
        }
    }
}