| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.preference; |
| |
| import android.app.Dialog; |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.database.ContentObserver; |
| import android.media.AudioManager; |
| import android.media.Ringtone; |
| import android.media.RingtoneManager; |
| import android.net.Uri; |
| import android.os.Handler; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.provider.Settings; |
| import android.provider.Settings.System; |
| import android.util.AttributeSet; |
| import android.view.KeyEvent; |
| import android.view.View; |
| import android.widget.SeekBar; |
| import android.widget.SeekBar.OnSeekBarChangeListener; |
| |
| /** |
| * @hide |
| */ |
| public class VolumePreference extends SeekBarDialogPreference implements |
| PreferenceManager.OnActivityStopListener, View.OnKeyListener { |
| |
| private static final String TAG = "VolumePreference"; |
| |
| private int mStreamType; |
| |
| /** May be null if the dialog isn't visible. */ |
| private SeekBarVolumizer mSeekBarVolumizer; |
| |
| public VolumePreference(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| |
| TypedArray a = context.obtainStyledAttributes(attrs, |
| com.android.internal.R.styleable.VolumePreference, 0, 0); |
| mStreamType = a.getInt(android.R.styleable.VolumePreference_streamType, 0); |
| a.recycle(); |
| } |
| |
| public void setStreamType(int streamType) { |
| mStreamType = streamType; |
| } |
| |
| @Override |
| protected void onBindDialogView(View view) { |
| super.onBindDialogView(view); |
| |
| final SeekBar seekBar = (SeekBar) view.findViewById(com.android.internal.R.id.seekbar); |
| mSeekBarVolumizer = new SeekBarVolumizer(getContext(), seekBar, mStreamType); |
| |
| getPreferenceManager().registerOnActivityStopListener(this); |
| |
| // grab focus and key events so that pressing the volume buttons in the |
| // dialog doesn't also show the normal volume adjust toast. |
| view.setOnKeyListener(this); |
| view.setFocusableInTouchMode(true); |
| view.requestFocus(); |
| } |
| |
| public boolean onKey(View v, int keyCode, KeyEvent event) { |
| // If key arrives immediately after the activity has been cleaned up. |
| if (mSeekBarVolumizer == null) return true; |
| boolean isdown = (event.getAction() == KeyEvent.ACTION_DOWN); |
| switch (keyCode) { |
| case KeyEvent.KEYCODE_VOLUME_DOWN: |
| if (isdown) { |
| mSeekBarVolumizer.changeVolumeBy(-1); |
| } |
| return true; |
| case KeyEvent.KEYCODE_VOLUME_UP: |
| if (isdown) { |
| mSeekBarVolumizer.changeVolumeBy(1); |
| } |
| return true; |
| case KeyEvent.KEYCODE_VOLUME_MUTE: |
| if (isdown) { |
| mSeekBarVolumizer.muteVolume(); |
| } |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| @Override |
| protected void onDialogClosed(boolean positiveResult) { |
| super.onDialogClosed(positiveResult); |
| |
| if (!positiveResult && mSeekBarVolumizer != null) { |
| mSeekBarVolumizer.revertVolume(); |
| } |
| |
| cleanup(); |
| } |
| |
| public void onActivityStop() { |
| cleanup(); |
| } |
| |
| /** |
| * Do clean up. This can be called multiple times! |
| */ |
| private void cleanup() { |
| getPreferenceManager().unregisterOnActivityStopListener(this); |
| |
| if (mSeekBarVolumizer != null) { |
| Dialog dialog = getDialog(); |
| if (dialog != null && dialog.isShowing()) { |
| View view = dialog.getWindow().getDecorView() |
| .findViewById(com.android.internal.R.id.seekbar); |
| if (view != null) view.setOnKeyListener(null); |
| // Stopped while dialog was showing, revert changes |
| mSeekBarVolumizer.revertVolume(); |
| } |
| mSeekBarVolumizer.stop(); |
| mSeekBarVolumizer = null; |
| } |
| |
| } |
| |
| protected void onSampleStarting(SeekBarVolumizer volumizer) { |
| if (mSeekBarVolumizer != null && volumizer != mSeekBarVolumizer) { |
| mSeekBarVolumizer.stopSample(); |
| } |
| } |
| |
| @Override |
| protected Parcelable onSaveInstanceState() { |
| final Parcelable superState = super.onSaveInstanceState(); |
| if (isPersistent()) { |
| // No need to save instance state since it's persistent |
| return superState; |
| } |
| |
| final SavedState myState = new SavedState(superState); |
| if (mSeekBarVolumizer != null) { |
| mSeekBarVolumizer.onSaveInstanceState(myState.getVolumeStore()); |
| } |
| return myState; |
| } |
| |
| @Override |
| protected void onRestoreInstanceState(Parcelable state) { |
| if (state == null || !state.getClass().equals(SavedState.class)) { |
| // Didn't save state for us in onSaveInstanceState |
| super.onRestoreInstanceState(state); |
| return; |
| } |
| |
| SavedState myState = (SavedState) state; |
| super.onRestoreInstanceState(myState.getSuperState()); |
| if (mSeekBarVolumizer != null) { |
| mSeekBarVolumizer.onRestoreInstanceState(myState.getVolumeStore()); |
| } |
| } |
| |
| public static class VolumeStore { |
| public int volume = -1; |
| public int originalVolume = -1; |
| } |
| |
| private static class SavedState extends BaseSavedState { |
| VolumeStore mVolumeStore = new VolumeStore(); |
| |
| public SavedState(Parcel source) { |
| super(source); |
| mVolumeStore.volume = source.readInt(); |
| mVolumeStore.originalVolume = source.readInt(); |
| } |
| |
| @Override |
| public void writeToParcel(Parcel dest, int flags) { |
| super.writeToParcel(dest, flags); |
| dest.writeInt(mVolumeStore.volume); |
| dest.writeInt(mVolumeStore.originalVolume); |
| } |
| |
| VolumeStore getVolumeStore() { |
| return mVolumeStore; |
| } |
| |
| public SavedState(Parcelable superState) { |
| super(superState); |
| } |
| |
| public static final Parcelable.Creator<SavedState> CREATOR = |
| new Parcelable.Creator<SavedState>() { |
| public SavedState createFromParcel(Parcel in) { |
| return new SavedState(in); |
| } |
| |
| public SavedState[] newArray(int size) { |
| return new SavedState[size]; |
| } |
| }; |
| } |
| |
| /** |
| * Turns a {@link SeekBar} into a volume control. |
| */ |
| public class SeekBarVolumizer implements OnSeekBarChangeListener, Runnable { |
| |
| private Context mContext; |
| private Handler mHandler = new Handler(); |
| |
| private AudioManager mAudioManager; |
| private int mStreamType; |
| private int mOriginalStreamVolume; |
| private Ringtone mRingtone; |
| |
| private int mLastProgress = -1; |
| private SeekBar mSeekBar; |
| private int mVolumeBeforeMute = -1; |
| |
| private ContentObserver mVolumeObserver = new ContentObserver(mHandler) { |
| @Override |
| public void onChange(boolean selfChange) { |
| super.onChange(selfChange); |
| if (mSeekBar != null && mAudioManager != null) { |
| int volume = mAudioManager.isStreamMute(mStreamType) ? |
| mAudioManager.getLastAudibleStreamVolume(mStreamType) |
| : mAudioManager.getStreamVolume(mStreamType); |
| mSeekBar.setProgress(volume); |
| } |
| } |
| }; |
| |
| public SeekBarVolumizer(Context context, SeekBar seekBar, int streamType) { |
| this(context, seekBar, streamType, null); |
| } |
| |
| public SeekBarVolumizer(Context context, SeekBar seekBar, int streamType, Uri defaultUri) { |
| mContext = context; |
| mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); |
| mStreamType = streamType; |
| mSeekBar = seekBar; |
| |
| initSeekBar(seekBar, defaultUri); |
| } |
| |
| private void initSeekBar(SeekBar seekBar, Uri defaultUri) { |
| seekBar.setMax(mAudioManager.getStreamMaxVolume(mStreamType)); |
| mOriginalStreamVolume = mAudioManager.getStreamVolume(mStreamType); |
| seekBar.setProgress(mOriginalStreamVolume); |
| seekBar.setOnSeekBarChangeListener(this); |
| |
| mContext.getContentResolver().registerContentObserver( |
| System.getUriFor(System.VOLUME_SETTINGS[mStreamType]), |
| false, mVolumeObserver); |
| |
| if (defaultUri == null) { |
| if (mStreamType == AudioManager.STREAM_RING) { |
| defaultUri = Settings.System.DEFAULT_RINGTONE_URI; |
| } else if (mStreamType == AudioManager.STREAM_NOTIFICATION) { |
| defaultUri = Settings.System.DEFAULT_NOTIFICATION_URI; |
| } else { |
| defaultUri = Settings.System.DEFAULT_ALARM_ALERT_URI; |
| } |
| } |
| |
| mRingtone = RingtoneManager.getRingtone(mContext, defaultUri); |
| |
| if (mRingtone != null) { |
| mRingtone.setStreamType(mStreamType); |
| } |
| } |
| |
| public void stop() { |
| stopSample(); |
| mContext.getContentResolver().unregisterContentObserver(mVolumeObserver); |
| mSeekBar.setOnSeekBarChangeListener(null); |
| } |
| |
| public void revertVolume() { |
| mAudioManager.setStreamVolume(mStreamType, mOriginalStreamVolume, 0); |
| } |
| |
| public void onProgressChanged(SeekBar seekBar, int progress, |
| boolean fromTouch) { |
| if (!fromTouch) { |
| return; |
| } |
| |
| postSetVolume(progress); |
| } |
| |
| void postSetVolume(int progress) { |
| // Do the volume changing separately to give responsive UI |
| mLastProgress = progress; |
| mHandler.removeCallbacks(this); |
| mHandler.post(this); |
| } |
| |
| public void onStartTrackingTouch(SeekBar seekBar) { |
| } |
| |
| public void onStopTrackingTouch(SeekBar seekBar) { |
| if (!isSamplePlaying()) { |
| startSample(); |
| } |
| } |
| |
| public void run() { |
| mAudioManager.setStreamVolume(mStreamType, mLastProgress, 0); |
| } |
| |
| public boolean isSamplePlaying() { |
| return mRingtone != null && mRingtone.isPlaying(); |
| } |
| |
| public void startSample() { |
| onSampleStarting(this); |
| if (mRingtone != null) { |
| mRingtone.play(); |
| } |
| } |
| |
| public void stopSample() { |
| if (mRingtone != null) { |
| mRingtone.stop(); |
| } |
| } |
| |
| public SeekBar getSeekBar() { |
| return mSeekBar; |
| } |
| |
| public void changeVolumeBy(int amount) { |
| mSeekBar.incrementProgressBy(amount); |
| if (!isSamplePlaying()) { |
| startSample(); |
| } |
| postSetVolume(mSeekBar.getProgress()); |
| mVolumeBeforeMute = -1; |
| } |
| |
| public void muteVolume() { |
| if (mVolumeBeforeMute != -1) { |
| mSeekBar.setProgress(mVolumeBeforeMute); |
| startSample(); |
| postSetVolume(mVolumeBeforeMute); |
| mVolumeBeforeMute = -1; |
| } else { |
| mVolumeBeforeMute = mSeekBar.getProgress(); |
| mSeekBar.setProgress(0); |
| stopSample(); |
| postSetVolume(0); |
| } |
| } |
| |
| public void onSaveInstanceState(VolumeStore volumeStore) { |
| if (mLastProgress >= 0) { |
| volumeStore.volume = mLastProgress; |
| volumeStore.originalVolume = mOriginalStreamVolume; |
| } |
| } |
| |
| public void onRestoreInstanceState(VolumeStore volumeStore) { |
| if (volumeStore.volume != -1) { |
| mOriginalStreamVolume = volumeStore.originalVolume; |
| mLastProgress = volumeStore.volume; |
| postSetVolume(mLastProgress); |
| } |
| } |
| } |
| } |