/*
* Copyright (C) 2010 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.android.music;
import android.app.Activity;
import android.content.AsyncQueryHandler;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.AudioManager.OnAudioFocusChangeListener;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.provider.MediaStore;
import android.provider.OpenableColumns;
import android.text.TextUtils;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageButton;
import android.widget.ProgressBar;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.Toast;
import java.io.IOException;
/**
* Dialog that comes up in response to various music-related VIEW intents.
*/
public class AudioPreview extends Activity implements OnPreparedListener, OnErrorListener, OnCompletionListener
{
private final static String TAG = "AudioPreview";
private PreviewPlayer mPlayer;
private TextView mTextLine1;
private TextView mTextLine2;
private TextView mLoadingText;
private SeekBar mSeekBar;
private Handler mProgressRefresher;
private boolean mSeeking = false;
private int mDuration;
private Uri mUri;
private long mMediaId = -1;
private static final int OPEN_IN_MUSIC = 1;
private AudioManager mAudioManager;
private boolean mPausedByTransientLossOfFocus;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
Intent intent = getIntent();
if (intent == null) {
finish();
return;
}
mUri = intent.getData();
if (mUri == null) {
finish();
return;
}
String scheme = mUri.getScheme();
setVolumeControlStream(AudioManager.STREAM_MUSIC);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.audiopreview);
mTextLine1 = (TextView) findViewById(R.id.line1);
mTextLine2 = (TextView) findViewById(R.id.line2);
mLoadingText = (TextView) findViewById(R.id.loading);
if (scheme.equals("http")) {
String msg = getString(R.string.streamloadingtext, mUri.getHost());
mLoadingText.setText(msg);
} else {
mLoadingText.setVisibility(View.GONE);
}
mSeekBar = (SeekBar) findViewById(R.id.progress);
mProgressRefresher = new Handler();
mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
PreviewPlayer player = (PreviewPlayer) getLastNonConfigurationInstance();
if (player == null) {
mPlayer = new PreviewPlayer();
mPlayer.setActivity(this);
try {
mPlayer.setDataSourceAndPrepare(mUri);
} catch (Exception ex) {
// catch generic Exception, since we may be called with a media
// content URI, another content provider's URI, a file URI,
// an http URI, and there are different exceptions associated
// with failure to open each of those.
Log.d(TAG, "Failed to open file: " + ex);
Toast.makeText(this, R.string.playback_failed, Toast.LENGTH_SHORT).show();
finish();
return;
}
} else {
mPlayer = player;
mPlayer.setActivity(this);
if (mPlayer.isPrepared()) {
showPostPrepareUI();
}
}
AsyncQueryHandler mAsyncQueryHandler = new AsyncQueryHandler(getContentResolver()) {
@Override
protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
if (cursor != null && cursor.moveToFirst()) {
int titleIdx = cursor.getColumnIndex(MediaStore.Audio.Media.TITLE);
int artistIdx = cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST);
int idIdx = cursor.getColumnIndex(MediaStore.Audio.Media._ID);
int displaynameIdx = cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
if (idIdx >=0) {
mMediaId = cursor.getLong(idIdx);
}
if (titleIdx >= 0) {
String title = cursor.getString(titleIdx);
mTextLine1.setText(title);
if (artistIdx >= 0) {
String artist = cursor.getString(artistIdx);
mTextLine2.setText(artist);
}
} else if (displaynameIdx >= 0) {
String name = cursor.getString(displaynameIdx);
mTextLine1.setText(name);
} else {
// Couldn't find anything to display, what to do now?
Log.w(TAG, "Cursor had no names for us");
}
} else {
Log.w(TAG, "empty cursor");
}
if (cursor != null) {
cursor.close();
}
setNames();
}
};
if (scheme.equals(ContentResolver.SCHEME_CONTENT)) {
if (mUri.getAuthority() == MediaStore.AUTHORITY) {
// try to get title and artist from the media content provider
mAsyncQueryHandler.startQuery(0, null, mUri, new String [] {
MediaStore.Audio.Media.TITLE, MediaStore.Audio.Media.ARTIST},
null, null, null);
} else {
// Try to get the display name from another content provider.
// Don't specifically ask for the display name though, since the
// provider might not actually support that column.
mAsyncQueryHandler.startQuery(0, null, mUri, null, null, null, null);
}
} else if (scheme.equals("file")) {
// check if this file is in the media database (clicking on a download
// in the download manager might follow this path
String path = mUri.getPath();
mAsyncQueryHandler.startQuery(0, null, MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
new String [] {MediaStore.Audio.Media._ID,
MediaStore.Audio.Media.TITLE, MediaStore.Audio.Media.ARTIST},
MediaStore.Audio.Media.DATA + "=?", new String [] {path}, null);
} else {
// We can't get metadata from the file/stream itself yet, because
// that API is hidden, so instead we display the URI being played
if (mPlayer.isPrepared()) {
setNames();
}
}
}
@Override
public Object onRetainNonConfigurationInstance() {
PreviewPlayer player = mPlayer;
mPlayer = null;
return player;
}
@Override
public void onDestroy() {
stopPlayback();
super.onDestroy();
}
private void stopPlayback() {
if (mProgressRefresher != null) {
mProgressRefresher.removeCallbacksAndMessages(null);
}
if (mPlayer != null) {
mPlayer.release();
mPlayer = null;
mAudioManager.abandonAudioFocus(mAudioFocusListener);
}
}
@Override
public void onUserLeaveHint() {
stopPlayback();
finish();
super.onUserLeaveHint();
}
public void onPrepared(MediaPlayer mp) {
if (isFinishing()) return;
mPlayer = (PreviewPlayer) mp;
setNames();
mPlayer.start();
showPostPrepareUI();
}
private void showPostPrepareUI() {
ProgressBar pb = (ProgressBar) findViewById(R.id.spinner);
pb.setVisibility(View.GONE);
mDuration = mPlayer.getDuration();
if (mDuration != 0) {
mSeekBar.setMax(mDuration);
mSeekBar.setVisibility(View.VISIBLE);
}
mSeekBar.setOnSeekBarChangeListener(mSeekListener);
mLoadingText.setVisibility(View.GONE);
View v = findViewById(R.id.titleandbuttons);
v.setVisibility(View.VISIBLE);
mAudioManager.requestAudioFocus(mAudioFocusListener, AudioManager.STREAM_MUSIC,
AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
mProgressRefresher.postDelayed(new ProgressRefresher(), 200);
updatePlayPause();
}
private OnAudioFocusChangeListener mAudioFocusListener = new OnAudioFocusChangeListener() {
public void onAudioFocusChange(int focusChange) {
if (mPlayer == null) {
// this activity has handed its MediaPlayer off to the next activity
// (e.g. portrait/landscape switch) and should abandon its focus
mAudioManager.abandonAudioFocus(this);
return;
}
switch (focusChange) {
case AudioManager.AUDIOFOCUS_LOSS:
mPausedByTransientLossOfFocus = false;
mPlayer.pause();
break;
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT:
case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK:
if (mPlayer.isPlaying()) {
mPausedByTransientLossOfFocus = true;
mPlayer.pause();
}
break;
case AudioManager.AUDIOFOCUS_GAIN:
if (mPausedByTransientLossOfFocus) {
mPausedByTransientLossOfFocus = false;
start();
}
break;
}
updatePlayPause();
}
};
private void start() {
mAudioManager.requestAudioFocus(mAudioFocusListener, AudioManager.STREAM_MUSIC,
AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
mPlayer.start();
mProgressRefresher.postDelayed(new ProgressRefresher(), 200);
}
public void setNames() {
if (TextUtils.isEmpty(mTextLine1.getText())) {
mTextLine1.setText(mUri.getLastPathSegment());
}
if (TextUtils.isEmpty(mTextLine2.getText())) {
mTextLine2.setVisibility(View.GONE);
} else {
mTextLine2.setVisibility(View.VISIBLE);
}
}
class ProgressRefresher implements Runnable {
public void run() {
if (mPlayer != null && !mSeeking && mDuration != 0) {
int progress = mPlayer.getCurrentPosition() / mDuration;
mSeekBar.setProgress(mPlayer.getCurrentPosition());
}
mProgressRefresher.removeCallbacksAndMessages(null);
mProgressRefresher.postDelayed(new ProgressRefresher(), 200);
}
}
private void updatePlayPause() {
ImageButton b = (ImageButton) findViewById(R.id.playpause);
if (b != null) {
if (mPlayer.isPlaying()) {
b.setImageResource(R.drawable.btn_playback_ic_pause_small);
} else {
b.setImageResource(R.drawable.btn_playback_ic_play_small);
mProgressRefresher.removeCallbacksAndMessages(null);
}
}
}
private OnSeekBarChangeListener mSeekListener = new OnSeekBarChangeListener() {
public void onStartTrackingTouch(SeekBar bar) {
mSeeking = true;
}
public void onProgressChanged(SeekBar bar, int progress, boolean fromuser) {
if (!fromuser) {
return;
}
mPlayer.seekTo(progress);
}
public void onStopTrackingTouch(SeekBar bar) {
mSeeking = false;
}
};
public boolean onError(MediaPlayer mp, int what, int extra) {
Toast.makeText(this, R.string.playback_failed, Toast.LENGTH_SHORT).show();
finish();
return true;
}
public void onCompletion(MediaPlayer mp) {
mSeekBar.setProgress(mDuration);
updatePlayPause();
}
public void playPauseClicked(View v) {
if (mPlayer.isPlaying()) {
mPlayer.pause();
} else {
start();
}
updatePlayPause();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
// TODO: if mMediaId != -1, then the playing file has an entry in the media
// database, and we could open it in the full music app instead.
// Ideally, we would hand off the currently running mediaplayer
// to the music UI, which can probably be done via a public static
menu.add(0, OPEN_IN_MUSIC, 0, "open in music");
return true;
}
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
MenuItem item = menu.findItem(OPEN_IN_MUSIC);
if (mMediaId >= 0) {
item.setVisible(true);
return true;
}
item.setVisible(false);
return false;
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_HEADSETHOOK:
case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE:
if (mPlayer.isPlaying()) {
mPlayer.pause();
} else {
start();
}
updatePlayPause();
return true;
case KeyEvent.KEYCODE_MEDIA_FAST_FORWARD:
case KeyEvent.KEYCODE_MEDIA_NEXT:
case KeyEvent.KEYCODE_MEDIA_PREVIOUS:
case KeyEvent.KEYCODE_MEDIA_REWIND:
return true;
case KeyEvent.KEYCODE_MEDIA_STOP:
case KeyEvent.KEYCODE_BACK:
stopPlayback();
finish();
return true;
}
return super.onKeyDown(keyCode, event);
}
/*
* Wrapper class to help with handing off the MediaPlayer to the next instance
* of the activity in case of orientation change, without losing any state.
*/
private static class PreviewPlayer extends MediaPlayer implements OnPreparedListener {
AudioPreview mActivity;
boolean mIsPrepared = false;
public void setActivity(AudioPreview activity) {
mActivity = activity;
setOnPreparedListener(this);
setOnErrorListener(mActivity);
setOnCompletionListener(mActivity);
}
public void setDataSourceAndPrepare(Uri uri) throws IllegalArgumentException,
SecurityException, IllegalStateException, IOException {
setDataSource(mActivity,uri);
prepareAsync();
}
/* (non-Javadoc)
* @see android.media.MediaPlayer.OnPreparedListener#onPrepared(android.media.MediaPlayer)
*/
@Override
public void onPrepared(MediaPlayer mp) {
mIsPrepared = true;
mActivity.onPrepared(mp);
}
boolean isPrepared() {
return mIsPrepared;
}
}
}