| /* |
| * Copyright (C) 2011 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.internal.widget; |
| |
| import java.lang.ref.WeakReference; |
| |
| import com.android.internal.widget.LockScreenWidgetCallback; |
| import com.android.internal.widget.LockScreenWidgetInterface; |
| |
| import android.app.PendingIntent; |
| import android.app.PendingIntent.CanceledException; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.graphics.Bitmap; |
| import android.media.AudioManager; |
| import android.media.MediaMetadataRetriever; |
| import android.media.RemoteControlClient; |
| import android.media.IRemoteControlDisplay; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.os.RemoteException; |
| import android.os.SystemClock; |
| import android.text.Spannable; |
| import android.text.TextUtils; |
| import android.text.style.ForegroundColorSpan; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| import android.view.KeyEvent; |
| import android.view.View; |
| import android.view.View.OnClickListener; |
| import android.widget.FrameLayout; |
| import android.widget.ImageView; |
| import android.widget.TextView; |
| |
| |
| import com.android.internal.R; |
| |
| public class TransportControlView extends FrameLayout implements OnClickListener, |
| LockScreenWidgetInterface { |
| |
| private static final int MSG_UPDATE_STATE = 100; |
| private static final int MSG_SET_METADATA = 101; |
| private static final int MSG_SET_TRANSPORT_CONTROLS = 102; |
| private static final int MSG_SET_ARTWORK = 103; |
| private static final int MSG_SET_GENERATION_ID = 104; |
| private static final int MAXDIM = 512; |
| private static final int DISPLAY_TIMEOUT_MS = 5000; // 5s |
| protected static final boolean DEBUG = false; |
| protected static final String TAG = "TransportControlView"; |
| |
| private ImageView mAlbumArt; |
| private TextView mTrackTitle; |
| private ImageView mBtnPrev; |
| private ImageView mBtnPlay; |
| private ImageView mBtnNext; |
| private int mClientGeneration; |
| private Metadata mMetadata = new Metadata(); |
| private boolean mAttached; |
| private PendingIntent mClientIntent; |
| private int mTransportControlFlags; |
| private int mCurrentPlayState; |
| private AudioManager mAudioManager; |
| private LockScreenWidgetCallback mWidgetCallbacks; |
| private IRemoteControlDisplayWeak mIRCD; |
| |
| /** |
| * The metadata which should be populated into the view once we've been attached |
| */ |
| private Bundle mPopulateMetadataWhenAttached = null; |
| |
| // This handler is required to ensure messages from IRCD are handled in sequence and on |
| // the UI thread. |
| private Handler mHandler = new Handler() { |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case MSG_UPDATE_STATE: |
| if (mClientGeneration == msg.arg1) updatePlayPauseState(msg.arg2); |
| break; |
| |
| case MSG_SET_METADATA: |
| if (mClientGeneration == msg.arg1) updateMetadata((Bundle) msg.obj); |
| break; |
| |
| case MSG_SET_TRANSPORT_CONTROLS: |
| if (mClientGeneration == msg.arg1) updateTransportControls(msg.arg2); |
| break; |
| |
| case MSG_SET_ARTWORK: |
| if (mClientGeneration == msg.arg1) { |
| if (mMetadata.bitmap != null) { |
| mMetadata.bitmap.recycle(); |
| } |
| mMetadata.bitmap = (Bitmap) msg.obj; |
| mAlbumArt.setImageBitmap(mMetadata.bitmap); |
| } |
| break; |
| |
| case MSG_SET_GENERATION_ID: |
| if (msg.arg2 != 0) { |
| // This means nobody is currently registered. Hide the view. |
| if (mWidgetCallbacks != null) { |
| mWidgetCallbacks.requestHide(TransportControlView.this); |
| } |
| } |
| if (DEBUG) Log.v(TAG, "New genId = " + msg.arg1 + ", clearing = " + msg.arg2); |
| mClientGeneration = msg.arg1; |
| mClientIntent = (PendingIntent) msg.obj; |
| break; |
| |
| } |
| } |
| }; |
| |
| /** |
| * This class is required to have weak linkage to the current TransportControlView |
| * because the remote process can hold a strong reference to this binder object and |
| * we can't predict when it will be GC'd in the remote process. Without this code, it |
| * would allow a heavyweight object to be held on this side of the binder when there's |
| * no requirement to run a GC on the other side. |
| */ |
| private static class IRemoteControlDisplayWeak extends IRemoteControlDisplay.Stub { |
| private WeakReference<Handler> mLocalHandler; |
| |
| IRemoteControlDisplayWeak(Handler handler) { |
| mLocalHandler = new WeakReference<Handler>(handler); |
| } |
| |
| public void setPlaybackState(int generationId, int state, long stateChangeTimeMs) { |
| Handler handler = mLocalHandler.get(); |
| if (handler != null) { |
| handler.obtainMessage(MSG_UPDATE_STATE, generationId, state).sendToTarget(); |
| } |
| } |
| |
| public void setMetadata(int generationId, Bundle metadata) { |
| Handler handler = mLocalHandler.get(); |
| if (handler != null) { |
| handler.obtainMessage(MSG_SET_METADATA, generationId, 0, metadata).sendToTarget(); |
| } |
| } |
| |
| public void setTransportControlFlags(int generationId, int flags) { |
| Handler handler = mLocalHandler.get(); |
| if (handler != null) { |
| handler.obtainMessage(MSG_SET_TRANSPORT_CONTROLS, generationId, flags) |
| .sendToTarget(); |
| } |
| } |
| |
| public void setArtwork(int generationId, Bitmap bitmap) { |
| Handler handler = mLocalHandler.get(); |
| if (handler != null) { |
| handler.obtainMessage(MSG_SET_ARTWORK, generationId, 0, bitmap).sendToTarget(); |
| } |
| } |
| |
| public void setAllMetadata(int generationId, Bundle metadata, Bitmap bitmap) { |
| Handler handler = mLocalHandler.get(); |
| if (handler != null) { |
| handler.obtainMessage(MSG_SET_METADATA, generationId, 0, metadata).sendToTarget(); |
| handler.obtainMessage(MSG_SET_ARTWORK, generationId, 0, bitmap).sendToTarget(); |
| } |
| } |
| |
| public void setCurrentClientId(int clientGeneration, PendingIntent mediaIntent, |
| boolean clearing) throws RemoteException { |
| Handler handler = mLocalHandler.get(); |
| if (handler != null) { |
| handler.obtainMessage(MSG_SET_GENERATION_ID, |
| clientGeneration, (clearing ? 1 : 0), mediaIntent).sendToTarget(); |
| } |
| } |
| }; |
| |
| public TransportControlView(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| if (DEBUG) Log.v(TAG, "Create TCV " + this); |
| mAudioManager = new AudioManager(mContext); |
| mCurrentPlayState = RemoteControlClient.PLAYSTATE_NONE; // until we get a callback |
| mIRCD = new IRemoteControlDisplayWeak(mHandler); |
| } |
| |
| private void updateTransportControls(int transportControlFlags) { |
| mTransportControlFlags = transportControlFlags; |
| } |
| |
| @Override |
| public void onFinishInflate() { |
| super.onFinishInflate(); |
| mTrackTitle = (TextView) findViewById(R.id.title); |
| mTrackTitle.setSelected(true); // enable marquee |
| mAlbumArt = (ImageView) findViewById(R.id.albumart); |
| mBtnPrev = (ImageView) findViewById(R.id.btn_prev); |
| mBtnPlay = (ImageView) findViewById(R.id.btn_play); |
| mBtnNext = (ImageView) findViewById(R.id.btn_next); |
| final View buttons[] = { mBtnPrev, mBtnPlay, mBtnNext }; |
| for (View view : buttons) { |
| view.setOnClickListener(this); |
| } |
| } |
| |
| @Override |
| public void onAttachedToWindow() { |
| super.onAttachedToWindow(); |
| if (mPopulateMetadataWhenAttached != null) { |
| updateMetadata(mPopulateMetadataWhenAttached); |
| mPopulateMetadataWhenAttached = null; |
| } |
| if (!mAttached) { |
| if (DEBUG) Log.v(TAG, "Registering TCV " + this); |
| mAudioManager.registerRemoteControlDisplay(mIRCD); |
| } |
| mAttached = true; |
| } |
| |
| @Override |
| public void onDetachedFromWindow() { |
| super.onDetachedFromWindow(); |
| if (mAttached) { |
| if (DEBUG) Log.v(TAG, "Unregistering TCV " + this); |
| mAudioManager.unregisterRemoteControlDisplay(mIRCD); |
| } |
| mAttached = false; |
| } |
| |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| int dim = Math.min(MAXDIM, Math.max(getWidth(), getHeight())); |
| // Log.v(TAG, "setting max bitmap size: " + dim + "x" + dim); |
| // mAudioManager.remoteControlDisplayUsesBitmapSize(mIRCD, dim, dim); |
| } |
| |
| class Metadata { |
| private String artist; |
| private String trackTitle; |
| private String albumTitle; |
| private Bitmap bitmap; |
| |
| public String toString() { |
| return "Metadata[artist=" + artist + " trackTitle=" + trackTitle + " albumTitle=" + albumTitle + "]"; |
| } |
| } |
| |
| private String getMdString(Bundle data, int id) { |
| return data.getString(Integer.toString(id)); |
| } |
| |
| private void updateMetadata(Bundle data) { |
| if (mAttached) { |
| mMetadata.artist = getMdString(data, MediaMetadataRetriever.METADATA_KEY_ALBUMARTIST); |
| mMetadata.trackTitle = getMdString(data, MediaMetadataRetriever.METADATA_KEY_TITLE); |
| mMetadata.albumTitle = getMdString(data, MediaMetadataRetriever.METADATA_KEY_ALBUM); |
| populateMetadata(); |
| } else { |
| mPopulateMetadataWhenAttached = data; |
| } |
| } |
| |
| /** |
| * Populates the given metadata into the view |
| */ |
| private void populateMetadata() { |
| StringBuilder sb = new StringBuilder(); |
| int trackTitleLength = 0; |
| if (!TextUtils.isEmpty(mMetadata.trackTitle)) { |
| sb.append(mMetadata.trackTitle); |
| trackTitleLength = mMetadata.trackTitle.length(); |
| } |
| if (!TextUtils.isEmpty(mMetadata.artist)) { |
| if (sb.length() != 0) { |
| sb.append(" - "); |
| } |
| sb.append(mMetadata.artist); |
| } |
| if (!TextUtils.isEmpty(mMetadata.albumTitle)) { |
| if (sb.length() != 0) { |
| sb.append(" - "); |
| } |
| sb.append(mMetadata.albumTitle); |
| } |
| mTrackTitle.setText(sb.toString(), TextView.BufferType.SPANNABLE); |
| Spannable str = (Spannable) mTrackTitle.getText(); |
| if (trackTitleLength != 0) { |
| str.setSpan(new ForegroundColorSpan(0xffffffff), 0, trackTitleLength, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| trackTitleLength++; |
| } |
| if (sb.length() > trackTitleLength) { |
| str.setSpan(new ForegroundColorSpan(0x7fffffff), trackTitleLength, sb.length(), |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } |
| |
| mAlbumArt.setImageBitmap(mMetadata.bitmap); |
| final int flags = mTransportControlFlags; |
| setVisibilityBasedOnFlag(mBtnPrev, flags, RemoteControlClient.FLAG_KEY_MEDIA_PREVIOUS); |
| setVisibilityBasedOnFlag(mBtnNext, flags, RemoteControlClient.FLAG_KEY_MEDIA_NEXT); |
| setVisibilityBasedOnFlag(mBtnPlay, flags, |
| RemoteControlClient.FLAG_KEY_MEDIA_PLAY |
| | RemoteControlClient.FLAG_KEY_MEDIA_PAUSE |
| | RemoteControlClient.FLAG_KEY_MEDIA_PLAY_PAUSE |
| | RemoteControlClient.FLAG_KEY_MEDIA_STOP); |
| |
| updatePlayPauseState(mCurrentPlayState); |
| } |
| |
| private static void setVisibilityBasedOnFlag(View view, int flags, int flag) { |
| if ((flags & flag) != 0) { |
| view.setVisibility(View.VISIBLE); |
| } else { |
| view.setVisibility(View.GONE); |
| } |
| } |
| |
| private void updatePlayPauseState(int state) { |
| if (DEBUG) Log.v(TAG, |
| "updatePlayPauseState(), old=" + mCurrentPlayState + ", state=" + state); |
| if (state == mCurrentPlayState) { |
| return; |
| } |
| final int imageResId; |
| final int imageDescId; |
| boolean showIfHidden = false; |
| switch (state) { |
| case RemoteControlClient.PLAYSTATE_ERROR: |
| imageResId = com.android.internal.R.drawable.stat_sys_warning; |
| // TODO use more specific image description string for warning, but here the "play" |
| // message is still valid because this button triggers a play command. |
| imageDescId = com.android.internal.R.string.lockscreen_transport_play_description; |
| break; |
| |
| case RemoteControlClient.PLAYSTATE_PLAYING: |
| imageResId = com.android.internal.R.drawable.ic_media_pause; |
| imageDescId = com.android.internal.R.string.lockscreen_transport_pause_description; |
| showIfHidden = true; |
| break; |
| |
| case RemoteControlClient.PLAYSTATE_BUFFERING: |
| imageResId = com.android.internal.R.drawable.ic_media_stop; |
| imageDescId = com.android.internal.R.string.lockscreen_transport_stop_description; |
| showIfHidden = true; |
| break; |
| |
| case RemoteControlClient.PLAYSTATE_PAUSED: |
| default: |
| imageResId = com.android.internal.R.drawable.ic_media_play; |
| imageDescId = com.android.internal.R.string.lockscreen_transport_play_description; |
| showIfHidden = false; |
| break; |
| } |
| mBtnPlay.setImageResource(imageResId); |
| mBtnPlay.setContentDescription(getResources().getString(imageDescId)); |
| if (showIfHidden && mWidgetCallbacks != null && !mWidgetCallbacks.isVisible(this)) { |
| mWidgetCallbacks.requestShow(this); |
| } |
| mCurrentPlayState = state; |
| } |
| |
| static class SavedState extends BaseSavedState { |
| boolean wasShowing; |
| |
| SavedState(Parcelable superState) { |
| super(superState); |
| } |
| |
| private SavedState(Parcel in) { |
| super(in); |
| this.wasShowing = in.readInt() != 0; |
| } |
| |
| @Override |
| public void writeToParcel(Parcel out, int flags) { |
| super.writeToParcel(out, flags); |
| out.writeInt(this.wasShowing ? 1 : 0); |
| } |
| |
| 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]; |
| } |
| }; |
| } |
| |
| @Override |
| public Parcelable onSaveInstanceState() { |
| if (DEBUG) Log.v(TAG, "onSaveInstanceState()"); |
| Parcelable superState = super.onSaveInstanceState(); |
| SavedState ss = new SavedState(superState); |
| ss.wasShowing = mWidgetCallbacks != null && mWidgetCallbacks.isVisible(this); |
| return ss; |
| } |
| |
| @Override |
| public void onRestoreInstanceState(Parcelable state) { |
| if (DEBUG) Log.v(TAG, "onRestoreInstanceState()"); |
| if (!(state instanceof SavedState)) { |
| super.onRestoreInstanceState(state); |
| return; |
| } |
| SavedState ss = (SavedState) state; |
| super.onRestoreInstanceState(ss.getSuperState()); |
| if (ss.wasShowing && mWidgetCallbacks != null) { |
| mWidgetCallbacks.requestShow(this); |
| } |
| } |
| |
| public void onClick(View v) { |
| int keyCode = -1; |
| if (v == mBtnPrev) { |
| keyCode = KeyEvent.KEYCODE_MEDIA_PREVIOUS; |
| } else if (v == mBtnNext) { |
| keyCode = KeyEvent.KEYCODE_MEDIA_NEXT; |
| } else if (v == mBtnPlay) { |
| keyCode = KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE; |
| |
| } |
| if (keyCode != -1) { |
| sendMediaButtonClick(keyCode); |
| if (mWidgetCallbacks != null) { |
| mWidgetCallbacks.userActivity(this); |
| } |
| } |
| } |
| |
| private void sendMediaButtonClick(int keyCode) { |
| if (mClientIntent == null) { |
| // Shouldn't be possible because this view should be hidden in this case. |
| Log.e(TAG, "sendMediaButtonClick(): No client is currently registered"); |
| return; |
| } |
| // use the registered PendingIntent that will be processed by the registered |
| // media button event receiver, which is the component of mClientIntent |
| KeyEvent keyEvent = new KeyEvent(KeyEvent.ACTION_DOWN, keyCode); |
| Intent intent = new Intent(Intent.ACTION_MEDIA_BUTTON); |
| intent.putExtra(Intent.EXTRA_KEY_EVENT, keyEvent); |
| try { |
| mClientIntent.send(getContext(), 0, intent); |
| } catch (CanceledException e) { |
| Log.e(TAG, "Error sending intent for media button down: "+e); |
| e.printStackTrace(); |
| } |
| |
| keyEvent = new KeyEvent(KeyEvent.ACTION_UP, keyCode); |
| intent = new Intent(Intent.ACTION_MEDIA_BUTTON); |
| intent.putExtra(Intent.EXTRA_KEY_EVENT, keyEvent); |
| try { |
| mClientIntent.send(getContext(), 0, intent); |
| } catch (CanceledException e) { |
| Log.e(TAG, "Error sending intent for media button up: "+e); |
| e.printStackTrace(); |
| } |
| } |
| |
| public void setCallback(LockScreenWidgetCallback callback) { |
| mWidgetCallbacks = callback; |
| } |
| |
| public boolean providesClock() { |
| return false; |
| } |
| |
| private boolean wasPlayingRecently(int state, long stateChangeTimeMs) { |
| switch (state) { |
| case RemoteControlClient.PLAYSTATE_PLAYING: |
| case RemoteControlClient.PLAYSTATE_FAST_FORWARDING: |
| case RemoteControlClient.PLAYSTATE_REWINDING: |
| case RemoteControlClient.PLAYSTATE_SKIPPING_FORWARDS: |
| case RemoteControlClient.PLAYSTATE_SKIPPING_BACKWARDS: |
| case RemoteControlClient.PLAYSTATE_BUFFERING: |
| // actively playing or about to play |
| return true; |
| case RemoteControlClient.PLAYSTATE_NONE: |
| return false; |
| case RemoteControlClient.PLAYSTATE_STOPPED: |
| case RemoteControlClient.PLAYSTATE_PAUSED: |
| case RemoteControlClient.PLAYSTATE_ERROR: |
| // we have stopped playing, check how long ago |
| if (DEBUG) { |
| if ((SystemClock.elapsedRealtime() - stateChangeTimeMs) < DISPLAY_TIMEOUT_MS) { |
| Log.v(TAG, "wasPlayingRecently: time < TIMEOUT was playing recently"); |
| } else { |
| Log.v(TAG, "wasPlayingRecently: time > TIMEOUT"); |
| } |
| } |
| return ((SystemClock.elapsedRealtime() - stateChangeTimeMs) < DISPLAY_TIMEOUT_MS); |
| default: |
| Log.e(TAG, "Unknown playback state " + state + " in wasPlayingRecently()"); |
| return false; |
| } |
| } |
| } |