我可以在偏好中制作铃声吗?

时间:2012-03-10 21:57:12

标签: java android preference ringtone

我如何制作铃声活动(总是出现在设置中),以便用户可以从系统铃声中选择她的铃声我用Google搜索但我没有找到完整的教程,我真的很困惑,请给我教程或一些代码

此外,如果我希望用户在我的应用程序中选择通知的特殊铃声,我应该使用共享偏好还是首选项?

我已经做了菜单:

      // Menu Code Part#2
    public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.id.about:
  startActivity(new Intent(this, About.class));
    return true;
    case R.id.help:
  startActivity(new Intent(this, Help.class));
    return true;
    case R.id.setting:
   startActivity(new Intent(this, Setting.class));
        return true;
    default:
    return super.onOptionsItemSelected(item);
   }

2 个答案:

答案 0 :(得分:6)

完整代码:

<强> RES / XML /的preferences.xml

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
      <PreferenceCategory
                android:title="Second Category">

        <RingtonePreference
                android:name="Ringtone Preference"
                android:summary="Select a ringtone"
                android:title="Ringtones"
                android:key="ringtonePref" />

</PreferenceCategory>
</PreferenceScreen>

<强> Preferences.class

public class Preferences extends PreferenceActivity {
@Override
        protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                addPreferencesFromResource(R.xml.preferences); 

 }
}

您的代码转到此处:

public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.id.about:
   // startActivity(new Intent(this, About.class));
    return true;
    case R.id.help:
    startActivity(new Intent(this, Help.class));
    return true;
    case R.id.setting:
    Intent settingsActivity = new Intent(getBaseContext(),
                                                Preferences.class);
                                startActivity(settingsActivity);


        return true;
    default:
    return super.onOptionsItemSelected(item);
    } 

要从代码中读取这些首选项,我们应该创建一个getPrefs()方法,我们可以在onStart()方法中调用它。当我们使用onStart()方法而不是onCreate()调用它时,我们可以确保在设置它们并返回到主要活动时加载首选项, getPrefs()方法可能如下所示:

String ringtonePreference;
// Get the xml/preferences.xml preferences
                SharedPreferences prefs = PreferenceManager
                                .getDefaultSharedPreferences(getBaseContext());
 ringtonePreference = prefs.getString("ringtonePref",
                                "DEFAULT_RINGTONE_URI");

<强>的AndroidManifest.xml

<activity
        android:name=".Preferences"
        android:label="@string/set_preferences">
</activity>

答案 1 :(得分:1)

是的,您可以使用SharedPreferences存储用户选择的铃声的URI。您可以让用户使用以下选项来选择铃声:

Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);
intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TYPE, RingtoneManager.TYPE_NOTIFICATION);
intent.putExtra(RingtoneManager.EXTRA_RINGTONE_TITLE, "Select Ringtone");
if (mRingtoneUri != null) { 
    intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, Uri.parse(mRingtoneUri));
} else {
    intent.putExtra(RingtoneManager.EXTRA_RINGTONE_EXISTING_URI, (Uri) null);
}
startActivityForResult(intent, RINGTONE_REQUEST);

以上代码将提示用户从系统中选择铃声。当他们选择一个时,您需要处理Activity结果:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == RINGTONE_REQUEST && resultCode == RESULT_OK) {
        Uri uri = data.getParcelableExtra(RingtoneManager.EXTRA_RINGTONE_PICKED_URI);
        SharedPreferences preferences = getSharedPreferences(PREF, MODE_PRIVATE);
        Editor editor = preferences.edit();
        if (uri == null)
            editor.putString(RINGTONE, null);
        else
            editor.putString(RINGTONE, uri.toString());
        editor.commit();
        if (uri == null)
            mRingtoneUri = null;
        else
            mRingtoneUri = uri.toString();
        }
    }
}

此代码会将铃声的URI保存到SharedPreferences