我的/raw 文件夹中有声音，我希望我的用户能够像 RingtonePreference 一样在偏好设置中选择一种声音，但只能使用我的声音。
最佳答案
这里是我的 RingtonePreference 替换。 列出所有系统铃声和您的自定义铃声(在 xml 中定义，存储在 res/raw 中):
ExtraRingtonePreference.java
package de.almisoft.test;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.TreeMap;
import de.almisoft.test.R;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.content.res.TypedArray;
import android.database.Cursor;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.preference.DialogPreference;
import android.util.AttributeSet;
public class ExtraRingtonePreference extends DialogPreference {
private Context mContext;
private String mValue;
private Ringtone ringtone;
private int mRingtoneType;
private boolean mShowSilent;
private boolean mShowDefault;
private CharSequence[] mExtraRingtones;
private CharSequence[] mExtraRingtoneTitles;
public ExtraRingtonePreference(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ExtraRingtonePreference, 0, 0);
mRingtoneType = a.getInt(R.styleable.ExtraRingtonePreference_ringtoneType, RingtoneManager.TYPE_RINGTONE);
mShowDefault = a.getBoolean(R.styleable.ExtraRingtonePreference_showDefault, true);
mShowSilent = a.getBoolean(R.styleable.ExtraRingtonePreference_showSilent, true);
mExtraRingtones = a.getTextArray(R.styleable.ExtraRingtonePreference_extraRingtones);
mExtraRingtoneTitles = a.getTextArray(R.styleable.ExtraRingtonePreference_extraRingtoneTitles);
a.recycle();
}
public ExtraRingtonePreference(Context context) {
this(context, null);
}
public String getValue() {
return mValue;
}
private Map<String, Uri> getSounds(int type) {
RingtoneManager ringtoneManager = new RingtoneManager(mContext);
ringtoneManager.setType(type);
Cursor cursor = ringtoneManager.getCursor();
Map<String, Uri> list = new TreeMap<String, Uri>();
while (cursor.moveToNext()) {
String notificationTitle = cursor.getString(RingtoneManager.TITLE_COLUMN_INDEX);
Uri notificationUri = ringtoneManager.getRingtoneUri(cursor.getPosition());
list.put(notificationTitle, notificationUri);
}
return list;
}
private Uri uriFromRaw(String name) {
int resId = mContext.getResources().getIdentifier(name, "raw", mContext.getPackageName());
return Uri.parse("android.resource://" + mContext.getPackageName() + "/" + resId);
}
private String getExtraRingtoneTitle(CharSequence name) {
if (mExtraRingtones != null && mExtraRingtoneTitles != null) {
int index = Arrays.asList(mExtraRingtones).indexOf(name);
return mExtraRingtoneTitles[index].toString();
}
return null;
}
@Override
public CharSequence getSummary() {
String ringtoneTitle = null;
if (mValue != null) {
if (mValue.length() == 0)
ringtoneTitle = mContext.getString(R.string.silent);
if (ringtoneTitle == null && mExtraRingtones != null && mExtraRingtoneTitles != null) {
for (int i = 0; i < mExtraRingtones.length; i++) {
Uri uriExtra = uriFromRaw(mExtraRingtones[i].toString());
if (uriExtra.equals(Uri.parse(mValue))) {
ringtoneTitle = mExtraRingtoneTitles[i].toString();
break;
}
}
}
if (ringtoneTitle == null) {
Ringtone ringtone = RingtoneManager.getRingtone(mContext, Uri.parse(mValue));
String title = ringtone.getTitle(mContext);
if (title != null && title.length() > 0)
ringtoneTitle = title;
}
}
CharSequence summary = super.getSummary();
if (ringtoneTitle != null) {
if (summary != null)
return String.format(summary.toString(), ringtoneTitle);
else
return ringtoneTitle;
} else return summary;
}
@Override
protected void onPrepareDialogBuilder(Builder builder) {
final Map<String, Uri> sounds = new LinkedHashMap<String, Uri>();
if (mExtraRingtones != null) {
for (CharSequence extraRingtone : mExtraRingtones) {
Uri uri = uriFromRaw(extraRingtone.toString());
String title = getExtraRingtoneTitle(extraRingtone);
sounds.put(title, uri);
}
}
if (mShowDefault) {
Uri uriDefault = RingtoneManager.getDefaultUri(mRingtoneType);
if (uriDefault != null) {
Ringtone ringtoneDefault = RingtoneManager.getRingtone(mContext, uriDefault);
if (ringtoneDefault != null) {
sounds.put(ringtoneDefault.getTitle(mContext), uriDefault);
}
}
}
if (mShowSilent)
sounds.put(mContext.getString(R.string.silent), Uri.parse(""));
sounds.putAll(getSounds(RingtoneManager.TYPE_NOTIFICATION));
final String[] titleArray = sounds.keySet().toArray(new String[0]);
final Uri[] uriArray = sounds.values().toArray(new Uri[0]);
int index = mValue != null ? Arrays.asList(uriArray).indexOf(Uri.parse(mValue)) : -1;
builder.setSingleChoiceItems(titleArray, index, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
if (ringtone != null)
ringtone.stop();
String title = titleArray[which];
Uri uri = uriArray[which];
if (uri != null) {
if (uri.toString().length() > 0) {
ringtone = RingtoneManager.getRingtone(mContext, uri);
ringtone.play();
}
mValue = uri.toString();
} else mValue = null;
}
});
builder.setPositiveButton(R.string.ok, this);
builder.setNegativeButton(R.string.cancel, this);
}
@Override
protected void onDialogClosed(boolean positiveResult) {
super.onDialogClosed(positiveResult);
if (ringtone != null)
ringtone.stop();
if (positiveResult && callChangeListener(mValue)) {
persistString(mValue);
notifyChanged();
}
}
@Override
protected Object onGetDefaultValue(TypedArray a, int index) {
return a.getString(index);
}
@Override
protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
if (restoreValue)
mValue = getPersistedString("");
else {
if (mExtraRingtones != null && defaultValue != null && defaultValue.toString().length() > 0) {
int index = Arrays.asList(mExtraRingtones).indexOf((CharSequence) defaultValue);
if (index >= 0)
mValue = uriFromRaw(defaultValue.toString()).toString();
else mValue = (String) defaultValue;
} else mValue = (String) defaultValue;
persistString(mValue);
}
}
}
res/values/attrs.xml
<?xml version="1.0" encoding="UTF-8"?>
<resources>
<declare-styleable name="ExtraRingtonePreference">
<attr name="ringtoneType">
<!-- Ringtones. -->
<flag name="ringtone" value="1" />
<!-- Notification sounds. -->
<flag name="notification" value="2" />
<!-- Alarm sounds. -->
<flag name="alarm" value="4" />
<!-- All available ringtone sounds. -->
<flag name="all" value="7" />
</attr>
<attr name="showSilent" format="boolean"/>
<attr name="showDefault" format="boolean"/>
<attr name="extraRingtones" format="reference"/>
<attr name="extraRingtoneTitles" format="reference"/>
</declare-styleable>
</resources>
res/values/strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="silent">Silent</string>
<string name="ok">OK</string>
<string name="cancel">Cancel</string>
<string name="ringtoneTitle">Ringtone</string>
<string name="ringtoneSummary">Ringtone: %s</string>
<string-array name="extraRingtones">
<item>deichkind_sone_musik</item>
<item>madonna_like_a_virgin</item>
</string-array>
<string-array name="extraRingtoneTitles">
<item>Sone Musik</item>
<item>Like A Virgin</item>
</string-array>
</resources>
资源/原始
res
↳ raw
↳ deichkind_sone_musik.mp3
↳ madonna_like_a_virgin.mp3
res/xml/preferences.xml
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:auto="http://schemas.android.com/apk/res-auto">
<de.almisoft.test.ExtraRingtonePreference
android:key="ringtone"
android:title="@string/ringtoneTitle"
android:summary="@string/ringtoneSummary"
android:defaultValue="deichkind_sone_musik"
auto:ringtoneType="notification"
auto:showSilent="true"
auto:showDefault="true"
auto:extraRingtones="@array/extraRingtones"
auto:extraRingtoneTitles="@array/extraRingtoneTitles"/>
<!-- set android:defaultValue
to "deichkind_sone_musik" for your custom mp3
to "" for silent
to "content://settings/system/notification_sound" for system default ringtone -->
</PreferenceScreen>
关于android - 在首选项中，像使用 RingtonePreference 一样选择我的声音，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11792120/