Constantly check for volume change in Android services

Question

I wrote this piece of code, it\'s obviously flawed. How do I go about creating a service which will constantly check for changes in volume? Key listeners cannot be used in s

Answer 1

If you want to see when the setting changes, you can register a ContentObserver with the settings provider to monitor it. For example, this is the observer in the settings app:

    private ContentObserver mVolumeObserver = new ContentObserver(mHandler) {
        @Override
        public void onChange(boolean selfChange) {
            super.onChange(selfChange);
            if (mSeekBar != null && mAudioManager != null) {
                int volume = mAudioManager.getStreamVolume(mStreamType);
                mSeekBar.setProgress(volume);
            }
        }
    };

And it is registered to observer the settings like this:

        import android.provider.Settings;
        import android.provider.Settings.System;

        mContext.getContentResolver().registerContentObserver(
                System.getUriFor(System.VOLUME_SETTINGS[mStreamType]),
                false, mVolumeObserver);