/*
* Copyright (C) 2013 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 com.example.android.supportv4.media;
import android.support.v4.media.TransportController;
import android.support.v4.media.TransportMediator;
import android.support.v4.media.TransportStateListener;
import com.example.android.supportv4.R;
import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;
import android.widget.FrameLayout;
import android.widget.ImageButton;
import android.widget.ProgressBar;
import android.widget.SeekBar;
import android.widget.TextView;
import java.util.Formatter;
import java.util.Locale;
/**
* Helper for implementing media controls in an application.
* Use instead of the very useful android.widget.MediaController.
* This version is embedded inside of an application's layout.
*/
public class MediaController extends FrameLayout {
private TransportController mController;
private Context mContext;
private ProgressBar mProgress;
private TextView mEndTime, mCurrentTime;
private boolean mDragging;
private boolean mUseFastForward;
private boolean mListenersSet;
private boolean mShowNext, mShowPrev;
private View.OnClickListener mNextListener, mPrevListener;
StringBuilder mFormatBuilder;
Formatter mFormatter;
private ImageButton mPauseButton;
private ImageButton mFfwdButton;
private ImageButton mRewButton;
private ImageButton mNextButton;
private ImageButton mPrevButton;
private TransportStateListener mStateListener = new TransportStateListener() {
@Override
public void onPlayingChanged(TransportController controller) {
updatePausePlay();
}
@Override
public void onTransportControlsChanged(TransportController controller) {
updateButtons();
}
};
public MediaController(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
mUseFastForward = true;
LayoutInflater inflate = (LayoutInflater)
mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflate.inflate(R.layout.media_controller, this, true);
initControllerView();
}
public MediaController(Context context, boolean useFastForward) {
super(context);
mContext = context;
mUseFastForward = useFastForward;
}
public MediaController(Context context) {
this(context, true);
}
public void setMediaPlayer(TransportController controller) {
if (getWindowToken() != null) {
if (mController != null) {
mController.unregisterStateListener(mStateListener);
}
if (controller != null) {
controller.registerStateListener(mStateListener);
}
}
mController = controller;
updatePausePlay();
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
if (mController != null) {
mController.registerStateListener(mStateListener);
}
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
if (mController != null) {
mController.unregisterStateListener(mStateListener);
}
}
private void initControllerView() {
mPauseButton = (ImageButton) findViewById(R.id.pause);
if (mPauseButton != null) {
mPauseButton.requestFocus();
mPauseButton.setOnClickListener(mPauseListener);
}
mFfwdButton = (ImageButton) findViewById(R.id.ffwd);
if (mFfwdButton != null) {
mFfwdButton.setOnClickListener(mFfwdListener);
mFfwdButton.setVisibility(mUseFastForward ? View.VISIBLE : View.GONE);
}
mRewButton = (ImageButton) findViewById(R.id.rew);
if (mRewButton != null) {
mRewButton.setOnClickListener(mRewListener);
mRewButton.setVisibility(mUseFastForward ? View.VISIBLE : View.GONE);
}
// By default these are hidden. They will be enabled when setPrevNextListeners() is called
mNextButton = (ImageButton) findViewById(R.id.next);
if (mNextButton != null && !mListenersSet) {
mNextButton.setVisibility(View.GONE);
}
mPrevButton = (ImageButton) findViewById(R.id.prev);
if (mPrevButton != null && !mListenersSet) {
mPrevButton.setVisibility(View.GONE);
}
mProgress = (ProgressBar) findViewById(R.id.mediacontroller_progress);
if (mProgress != null) {
if (mProgress instanceof SeekBar) {
SeekBar seeker = (SeekBar) mProgress;
seeker.setOnSeekBarChangeListener(mSeekListener);
}
mProgress.setMax(1000);
}
mEndTime = (TextView) findViewById(R.id.time);
mCurrentTime = (TextView) findViewById(R.id.time_current);
mFormatBuilder = new StringBuilder();
mFormatter = new Formatter(mFormatBuilder, Locale.getDefault());
installPrevNextListeners();
}
/**
* Disable pause or seek buttons if the stream cannot be paused or seeked.
* This requires the control interface to be a MediaPlayerControlExt
*/
void updateButtons() {
int flags = mController.getTransportControlFlags();
boolean enabled = isEnabled();
if (mPauseButton != null) {
mPauseButton.setEnabled(enabled && (flags&TransportMediator.FLAG_KEY_MEDIA_PAUSE) != 0);
}
if (mRewButton != null) {
mRewButton.setEnabled(enabled && (flags&TransportMediator.FLAG_KEY_MEDIA_REWIND) != 0);
}
if (mFfwdButton != null) {
mFfwdButton.setEnabled(enabled &&
(flags&TransportMediator.FLAG_KEY_MEDIA_FAST_FORWARD) != 0);
}
if (mPrevButton != null) {
mShowPrev = (flags&TransportMediator.FLAG_KEY_MEDIA_PREVIOUS) != 0
|| mPrevListener != null;
mPrevButton.setEnabled(enabled && mShowPrev);
}
if (mNextButton != null) {
mShowNext = (flags&TransportMediator.FLAG_KEY_MEDIA_NEXT) != 0
|| mNextListener != null;
mNextButton.setEnabled(enabled && mShowNext);
}
}
public void refresh() {
updateProgress();
updateButtons();
updatePausePlay();
}
private String stringForTime(int timeMs) {
int totalSeconds = timeMs / 1000;
int seconds = totalSeconds % 60;
int minutes = (totalSeconds / 60) % 60;
int hours = totalSeconds / 3600;
mFormatBuilder.setLength(0);
if (hours > 0) {
return mFormatter.format("%d:%02d:%02d", hours, minutes, seconds).toString();
} else {
return mFormatter.format("%02d:%02d", minutes, seconds).toString();
}
}
public long updateProgress() {
if (mController == null || mDragging) {
return 0;
}
long position = mController.getCurrentPosition();
long duration = mController.getDuration();
if (mProgress != null) {
if (duration > 0) {
// use long to avoid overflow
long pos = 1000L * position / duration;
mProgress.setProgress( (int) pos);
}
int percent = mController.getBufferPercentage();
mProgress.setSecondaryProgress(percent * 10);
}
if (mEndTime != null)
mEndTime.setText(stringForTime((int)duration));
if (mCurrentTime != null)
mCurrentTime.setText(stringForTime((int)position));
return position;
}
private View.OnClickListener mPauseListener = new View.OnClickListener() {
public void onClick(View v) {
doPauseResume();
}
};
private void updatePausePlay() {
if (mPauseButton == null)
return;
if (mController.isPlaying()) {
mPauseButton.setImageResource(android.R.drawable.ic_media_pause);
} else {
mPauseButton.setImageResource(android.R.drawable.ic_media_play);
}
}
private void doPauseResume() {
if (mController.isPlaying()) {
mController.pausePlaying();
} else {
mController.startPlaying();
}
updatePausePlay();
}
// There are two scenarios that can trigger the seekbar listener to trigger:
//
// The first is the user using the touchpad to adjust the posititon of the
// seekbar's thumb. In this case onStartTrackingTouch is called followed by
// a number of onProgressChanged notifications, concluded by onStopTrackingTouch.
// We're setting the field "mDragging" to true for the duration of the dragging
// session to avoid jumps in the position in case of ongoing playback.
//
// The second scenario involves the user operating the scroll ball, in this
// case there WON'T BE onStartTrackingTouch/onStopTrackingTouch notifications,
// we will simply apply the updated position without suspending regular updates.
private SeekBar.OnSeekBarChangeListener mSeekListener = new SeekBar.OnSeekBarChangeListener() {
public void onStartTrackingTouch(SeekBar bar) {
mDragging = true;
}
public void onProgressChanged(SeekBar bar, int progress, boolean fromuser) {
if (!fromuser) {
// We're not interested in programmatically generated changes to
// the progress bar's position.
return;
}
long duration = mController.getDuration();
long newposition = (duration * progress) / 1000L;
mController.seekTo((int) newposition);
if (mCurrentTime != null)
mCurrentTime.setText(stringForTime( (int) newposition));
}
public void onStopTrackingTouch(SeekBar bar) {
mDragging = false;
updateProgress();
updatePausePlay();
}
};
@Override
public void setEnabled(boolean enabled) {
super.setEnabled(enabled);
updateButtons();
}
@Override
public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
super.onInitializeAccessibilityEvent(event);
event.setClassName(MediaController.class.getName());
}
@Override
public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
super.onInitializeAccessibilityNodeInfo(info);
info.setClassName(MediaController.class.getName());
}
private View.OnClickListener mRewListener = new View.OnClickListener() {
public void onClick(View v) {
long pos = mController.getCurrentPosition();
pos -= 5000; // milliseconds
mController.seekTo(pos);
updateProgress();
}
};
private View.OnClickListener mFfwdListener = new View.OnClickListener() {
public void onClick(View v) {
long pos = mController.getCurrentPosition();
pos += 15000; // milliseconds
mController.seekTo(pos);
updateProgress();
}
};
private void installPrevNextListeners() {
if (mNextButton != null) {
mNextButton.setOnClickListener(mNextListener);
mNextButton.setEnabled(mShowNext);
}
if (mPrevButton != null) {
mPrevButton.setOnClickListener(mPrevListener);
mPrevButton.setEnabled(mShowPrev);
}
}
public void setPrevNextListeners(View.OnClickListener next, View.OnClickListener prev) {
mNextListener = next;
mPrevListener = prev;
mListenersSet = true;
installPrevNextListeners();
if (mNextButton != null) {
mNextButton.setVisibility(View.VISIBLE);
mShowNext = true;
}
if (mPrevButton != null) {
mPrevButton.setVisibility(View.VISIBLE);
mShowPrev = true;
}
}
}