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