src/com/android/car/media/MediaActivity.java - platform/packages/apps/Car/Media - Git at Google

 /*
  * Copyright (C) 2016 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.car.media;

 import android.content.ComponentName;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.os.Bundle;
 import android.provider.MediaStore;
 import android.support.v4.app.Fragment;
 import android.util.Log;
 import android.util.Pair;
 import android.util.TypedValue;
 import android.view.View;

 import com.android.car.app.CarDrawerActivity;
 import com.android.car.app.CarDrawerAdapter;
 import com.android.car.media.drawer.MediaDrawerController;

 /**
  * This activity controls the UI of media. It also updates the connection status for the media app
  * by broadcast. Drawer menu is controlled by {@link MediaDrawerController}.
  */
 public class MediaActivity extends CarDrawerActivity {
     private static final String ACTION_MEDIA_APP_STATE_CHANGE
             = "android.intent.action.MEDIA_APP_STATE_CHANGE";
     private static final String EXTRA_MEDIA_APP_FOREGROUND
             = "android.intent.action.MEDIA_APP_STATE";

     private static final String TAG = "MediaActivity";

     /**
      * Whether or not {@link #onResume()} has been called.
      */
     private static boolean sIsRunning = false;

     /**
      * Whether or not {@link #onStart()} has been called.
      */
     private boolean mIsStarted;

     /**
      * {@code true} if there was a request to change the content fragment of this Activity when
      * it is not started. Then, when onStart() is called, the content fragment will be added.
      *
      * <p>This prevents a bug where the content fragment is added when the app is not running,
      * causing a StateLossException.
      */
     private boolean mContentFragmentChangeQueued;

     private MediaDrawerController mDrawerController;
     private View mScrimView;
     private CrossfadeImageView mAlbumArtView;
     private MediaPlaybackFragment mMediaPlaybackFragment;

     @Override
     protected void onStart() {
         super.onStart();
         Intent i = new Intent(ACTION_MEDIA_APP_STATE_CHANGE);
         i.putExtra(EXTRA_MEDIA_APP_FOREGROUND, true);
         sendBroadcast(i);

         mIsStarted = true;

         if (mContentFragmentChangeQueued) {
             if (Log.isLoggable(TAG, Log.DEBUG)) {
                 Log.d(TAG, "Content fragment queued. Attaching now.");
             }
             attachContentFragment();
             mContentFragmentChangeQueued = false;
         }
     }

     @Override
     protected void onStop() {
         super.onStop();
         Intent i = new Intent(ACTION_MEDIA_APP_STATE_CHANGE);
         i.putExtra(EXTRA_MEDIA_APP_FOREGROUND, false);
         sendBroadcast(i);

         mIsStarted = false;
     }

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         mDrawerController = new MediaDrawerController(this);
         super.onCreate(savedInstanceState);

         setMainContent(R.layout.media_activity);
         mScrimView = findViewById(R.id.scrim);
         mAlbumArtView = (CrossfadeImageView) findViewById(R.id.album_art);
         setBackgroundColor(getColor(R.color.music_default_artwork));
         MediaManager.getInstance(this).addListener(mListener);
     }

     @Override
     public void onDestroy() {
         super.onDestroy();
         // Send the broadcast to let the current connected media app know it is disconnected now.
         sendMediaConnectionStatusBroadcast(
                 MediaManager.getInstance(this).getCurrentComponent(),
                 MediaConstants.MEDIA_DISCONNECTED);
         mDrawerController.cleanup();
         MediaManager.getInstance(this).removeListener(mListener);
     }

     @Override
     protected CarDrawerAdapter getRootAdapter() {
         return mDrawerController.getRootAdapter();
     }

     @Override
     public void onResumeFragments() {
         if (Log.isLoggable(TAG, Log.DEBUG)) {
             Log.d(TAG, "onResumeFragments");
         }

         super.onResumeFragments();
         handleIntent(getIntent());
         sIsRunning = true;
     }

     @Override
     public void onPause() {
         if (Log.isLoggable(TAG, Log.DEBUG)) {
             Log.d(TAG, "onPause");
         }

         super.onPause();
         sIsRunning = false;
     }

     @Override
     protected void onNewIntent(Intent intent) {
         super.onNewIntent(intent);
         if (Log.isLoggable(TAG, Log.VERBOSE)) {
             Log.v(TAG, "onNewIntent(); intent: " + (intent == null ? "<< NULL >>" : intent));
         }

         setIntent(intent);
         closeDrawer();
     }

     @Override
     public void onBackPressed() {
         if (mMediaPlaybackFragment.isOverflowMenuVisible()) {
             mMediaPlaybackFragment.closeOverflowMenu();
         }
         super.onBackPressed();
     }

     /**
      * Darken scrim when new messages are displayed in {@link MediaPlaybackFragment}.
      */
     public void darkenScrim(boolean dark) {
         if (!sIsRunning) {
             return;
         }

         if (dark) {
             mScrimView.animate().alpha(0.9f)
                     .setDuration(getResources().getInteger(R.integer.media_scrim_duration_ms));
         } else {
             mScrimView.animate().alpha(0.6f)
                     .setDuration(getResources().getInteger(R.integer.media_scrim_duration_ms));
         }
     }

     /**
      * Don't show scrim when there is no content, else show it.
      */
     public void setScrimVisibility(boolean visible) {
         if (visible) {
             TypedValue scrimAlpha = new TypedValue();
             getResources().getValue(R.dimen.media_scrim_alpha, scrimAlpha, true);
             mScrimView.animate().alpha(scrimAlpha.getFloat())
                     .setDuration(getResources().getInteger(R.integer.media_scrim_duration_ms));
         } else {
             mScrimView.animate().alpha(0.0f)
                     .setDuration(getResources().getInteger(R.integer.media_scrim_duration_ms));

         }
     }

     /**
      * Return the dimension of the background album art in the form of <width, height>.
      */
     public Pair<Integer, Integer> getAlbumArtSize() {
         if (mAlbumArtView != null) {
             return Pair.create(mAlbumArtView.getWidth(), mAlbumArtView.getHeight());
         }
         return null;
     }

     void setBackgroundBitmap(Bitmap bitmap, boolean showAnimation) {
         mAlbumArtView.setImageBitmap(bitmap, showAnimation);
     }

     void setBackgroundColor(int color) {
         mAlbumArtView.setBackgroundColor(color);
     }

     private void handleIntent(Intent intent) {
         Bundle extras = null;
         if (intent != null) {
             extras = intent.getExtras();
         }

         // If the intent has a media component name set, connect to it directly
         if (extras != null && extras.containsKey(MediaManager.KEY_MEDIA_PACKAGE) &&
                 extras.containsKey(MediaManager.KEY_MEDIA_CLASS)) {
             if (Log.isLoggable(TAG, Log.DEBUG)) {
                 Log.d(TAG, "Media component in intent.");
             }

             ComponentName component = new ComponentName(
                     intent.getStringExtra(MediaManager.KEY_MEDIA_PACKAGE),
                     intent.getStringExtra(MediaManager.KEY_MEDIA_CLASS)
             );
             MediaManager.getInstance(this).setMediaClientComponent(component);
         } else {
             if (Log.isLoggable(TAG, Log.DEBUG)) {
                 Log.d(TAG, "Launching most recent / default component.");
             }

             // Set it to the default GPM component.
             MediaManager.getInstance(this).connectToMostRecentMediaComponent(
                     new CarClientServiceAdapter(getPackageManager()));
         }

         if (isSearchIntent(intent)) {
             MediaManager.getInstance(this).processSearchIntent(intent);
             setIntent(null);
         }
     }

     private boolean isSearchIntent(Intent intent) {
         return (intent != null && intent.getAction() != null &&
                 intent.getAction().equals(MediaStore.INTENT_ACTION_MEDIA_PLAY_FROM_SEARCH));
     }

     private void sendMediaConnectionStatusBroadcast(
             ComponentName componentName, String connectionStatus) {
         // It will be no current component if no media app is chosen before.
         if (componentName == null) {
             return;
         }

         Intent intent = new Intent(MediaConstants.ACTION_MEDIA_STATUS);
         intent.setPackage(componentName.getPackageName());
         intent.putExtra(MediaConstants.MEDIA_CONNECTION_STATUS, connectionStatus);
         sendBroadcast(intent);
     }

     void attachContentFragment() {
         if (mMediaPlaybackFragment == null) {
             mMediaPlaybackFragment = new MediaPlaybackFragment();
         }

         setContentFragment(mMediaPlaybackFragment);
     }

     private final MediaManager.Listener mListener = new MediaManager.Listener() {

         @Override
         public void onMediaAppChanged(ComponentName componentName) {
             sendMediaConnectionStatusBroadcast(componentName, MediaConstants.MEDIA_CONNECTED);

             // Since this callback happens asynchronously, ensure that the Activity has been
             // started before changing fragments. Otherwise, the attach fragment will throw
             // an IllegalStateException due to Fragment's checkStateLoss.
             if (mIsStarted) {
                 if (Log.isLoggable(TAG, Log.DEBUG)) {
                     Log.d(TAG, "onMediaAppChanged: attaching content fragment");
                 }
                 attachContentFragment();
             } else {
                 if (Log.isLoggable(TAG, Log.DEBUG)) {
                     Log.d(TAG, "onMediaAppChanged: queuing content fragment change");
                 }
                 mContentFragmentChangeQueued = true;
             }
         }

         @Override
         public void onStatusMessageChanged(String msg) {}
     };

     private void setContentFragment(Fragment fragment) {
         getSupportFragmentManager().beginTransaction()
                 .replace(getContentContainerId(), fragment)
                 .commit();
     }


     void showQueueInDrawer() {
         mDrawerController.showQueueInDrawer();
     }
 }
	/*
	* Copyright (C) 2016 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.car.media;

	import android.content.ComponentName;
	import android.content.Intent;
	import android.graphics.Bitmap;
	import android.os.Bundle;
	import android.provider.MediaStore;
	import android.support.v4.app.Fragment;
	import android.util.Log;
	import android.util.Pair;
	import android.util.TypedValue;
	import android.view.View;

	import com.android.car.app.CarDrawerActivity;
	import com.android.car.app.CarDrawerAdapter;
	import com.android.car.media.drawer.MediaDrawerController;

	/**
	* This activity controls the UI of media. It also updates the connection status for the media app
	* by broadcast. Drawer menu is controlled by {@link MediaDrawerController}.
	*/
	public class MediaActivity extends CarDrawerActivity {
	private static final String ACTION_MEDIA_APP_STATE_CHANGE
	= "android.intent.action.MEDIA_APP_STATE_CHANGE";
	private static final String EXTRA_MEDIA_APP_FOREGROUND
	= "android.intent.action.MEDIA_APP_STATE";

	private static final String TAG = "MediaActivity";

	/**
	* Whether or not {@link #onResume()} has been called.
	*/
	private static boolean sIsRunning = false;

	/**
	* Whether or not {@link #onStart()} has been called.
	*/
	private boolean mIsStarted;

	/**
	* {@code true} if there was a request to change the content fragment of this Activity when
	* it is not started. Then, when onStart() is called, the content fragment will be added.
	*
	* <p>This prevents a bug where the content fragment is added when the app is not running,
	* causing a StateLossException.
	*/
	private boolean mContentFragmentChangeQueued;

	private MediaDrawerController mDrawerController;
	private View mScrimView;
	private CrossfadeImageView mAlbumArtView;
	private MediaPlaybackFragment mMediaPlaybackFragment;

	@Override
	protected void onStart() {
	super.onStart();
	Intent i = new Intent(ACTION_MEDIA_APP_STATE_CHANGE);
	i.putExtra(EXTRA_MEDIA_APP_FOREGROUND, true);
	sendBroadcast(i);

	mIsStarted = true;

	if (mContentFragmentChangeQueued) {
	if (Log.isLoggable(TAG, Log.DEBUG)) {
	Log.d(TAG, "Content fragment queued. Attaching now.");
	}
	attachContentFragment();
	mContentFragmentChangeQueued = false;
	}
	}

	@Override
	protected void onStop() {
	super.onStop();
	Intent i = new Intent(ACTION_MEDIA_APP_STATE_CHANGE);
	i.putExtra(EXTRA_MEDIA_APP_FOREGROUND, false);
	sendBroadcast(i);

	mIsStarted = false;
	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
	mDrawerController = new MediaDrawerController(this);
	super.onCreate(savedInstanceState);

	setMainContent(R.layout.media_activity);
	mScrimView = findViewById(R.id.scrim);
	mAlbumArtView = (CrossfadeImageView) findViewById(R.id.album_art);
	setBackgroundColor(getColor(R.color.music_default_artwork));
	MediaManager.getInstance(this).addListener(mListener);
	}

	@Override
	public void onDestroy() {
	super.onDestroy();
	// Send the broadcast to let the current connected media app know it is disconnected now.
	sendMediaConnectionStatusBroadcast(
	MediaManager.getInstance(this).getCurrentComponent(),
	MediaConstants.MEDIA_DISCONNECTED);
	mDrawerController.cleanup();
	MediaManager.getInstance(this).removeListener(mListener);
	}

	@Override
	protected CarDrawerAdapter getRootAdapter() {
	return mDrawerController.getRootAdapter();
	}

	@Override
	public void onResumeFragments() {
	if (Log.isLoggable(TAG, Log.DEBUG)) {
	Log.d(TAG, "onResumeFragments");
	}

	super.onResumeFragments();
	handleIntent(getIntent());
	sIsRunning = true;
	}

	@Override
	public void onPause() {
	if (Log.isLoggable(TAG, Log.DEBUG)) {
	Log.d(TAG, "onPause");
	}

	super.onPause();
	sIsRunning = false;
	}

	@Override
	protected void onNewIntent(Intent intent) {
	super.onNewIntent(intent);
	if (Log.isLoggable(TAG, Log.VERBOSE)) {
	Log.v(TAG, "onNewIntent(); intent: " + (intent == null ? "<< NULL >>" : intent));
	}

	setIntent(intent);
	closeDrawer();
	}

	@Override
	public void onBackPressed() {
	if (mMediaPlaybackFragment.isOverflowMenuVisible()) {
	mMediaPlaybackFragment.closeOverflowMenu();
	}
	super.onBackPressed();
	}

	/**
	* Darken scrim when new messages are displayed in {@link MediaPlaybackFragment}.
	*/
	public void darkenScrim(boolean dark) {
	if (!sIsRunning) {
	return;
	}

	if (dark) {
	mScrimView.animate().alpha(0.9f)
	.setDuration(getResources().getInteger(R.integer.media_scrim_duration_ms));
	} else {
	mScrimView.animate().alpha(0.6f)
	.setDuration(getResources().getInteger(R.integer.media_scrim_duration_ms));
	}
	}

	/**
	* Don't show scrim when there is no content, else show it.
	*/
	public void setScrimVisibility(boolean visible) {
	if (visible) {
	TypedValue scrimAlpha = new TypedValue();
	getResources().getValue(R.dimen.media_scrim_alpha, scrimAlpha, true);
	mScrimView.animate().alpha(scrimAlpha.getFloat())
	.setDuration(getResources().getInteger(R.integer.media_scrim_duration_ms));
	} else {
	mScrimView.animate().alpha(0.0f)
	.setDuration(getResources().getInteger(R.integer.media_scrim_duration_ms));

	}
	}

	/**
	* Return the dimension of the background album art in the form of <width, height>.
	*/
	public Pair<Integer, Integer> getAlbumArtSize() {
	if (mAlbumArtView != null) {
	return Pair.create(mAlbumArtView.getWidth(), mAlbumArtView.getHeight());
	}
	return null;
	}

	void setBackgroundBitmap(Bitmap bitmap, boolean showAnimation) {
	mAlbumArtView.setImageBitmap(bitmap, showAnimation);
	}

	void setBackgroundColor(int color) {
	mAlbumArtView.setBackgroundColor(color);
	}

	private void handleIntent(Intent intent) {
	Bundle extras = null;
	if (intent != null) {
	extras = intent.getExtras();
	}

	// If the intent has a media component name set, connect to it directly
	if (extras != null && extras.containsKey(MediaManager.KEY_MEDIA_PACKAGE) &&
	extras.containsKey(MediaManager.KEY_MEDIA_CLASS)) {
	if (Log.isLoggable(TAG, Log.DEBUG)) {
	Log.d(TAG, "Media component in intent.");
	}

	ComponentName component = new ComponentName(
	intent.getStringExtra(MediaManager.KEY_MEDIA_PACKAGE),
	intent.getStringExtra(MediaManager.KEY_MEDIA_CLASS)
	);
	MediaManager.getInstance(this).setMediaClientComponent(component);
	} else {
	if (Log.isLoggable(TAG, Log.DEBUG)) {
	Log.d(TAG, "Launching most recent / default component.");
	}

	// Set it to the default GPM component.
	MediaManager.getInstance(this).connectToMostRecentMediaComponent(
	new CarClientServiceAdapter(getPackageManager()));
	}

	if (isSearchIntent(intent)) {
	MediaManager.getInstance(this).processSearchIntent(intent);
	setIntent(null);
	}
	}

	private boolean isSearchIntent(Intent intent) {
	return (intent != null && intent.getAction() != null &&
	intent.getAction().equals(MediaStore.INTENT_ACTION_MEDIA_PLAY_FROM_SEARCH));
	}

	private void sendMediaConnectionStatusBroadcast(
	ComponentName componentName, String connectionStatus) {
	// It will be no current component if no media app is chosen before.
	if (componentName == null) {
	return;
	}

	Intent intent = new Intent(MediaConstants.ACTION_MEDIA_STATUS);
	intent.setPackage(componentName.getPackageName());
	intent.putExtra(MediaConstants.MEDIA_CONNECTION_STATUS, connectionStatus);
	sendBroadcast(intent);
	}

	void attachContentFragment() {
	if (mMediaPlaybackFragment == null) {
	mMediaPlaybackFragment = new MediaPlaybackFragment();
	}

	setContentFragment(mMediaPlaybackFragment);
	}

	private final MediaManager.Listener mListener = new MediaManager.Listener() {

	@Override
	public void onMediaAppChanged(ComponentName componentName) {
	sendMediaConnectionStatusBroadcast(componentName, MediaConstants.MEDIA_CONNECTED);

	// Since this callback happens asynchronously, ensure that the Activity has been
	// started before changing fragments. Otherwise, the attach fragment will throw
	// an IllegalStateException due to Fragment's checkStateLoss.
	if (mIsStarted) {
	if (Log.isLoggable(TAG, Log.DEBUG)) {
	Log.d(TAG, "onMediaAppChanged: attaching content fragment");
	}
	attachContentFragment();
	} else {
	if (Log.isLoggable(TAG, Log.DEBUG)) {
	Log.d(TAG, "onMediaAppChanged: queuing content fragment change");
	}
	mContentFragmentChangeQueued = true;
	}
	}

	@Override
	public void onStatusMessageChanged(String msg) {}
	};

	private void setContentFragment(Fragment fragment) {
	getSupportFragmentManager().beginTransaction()
	.replace(getContentContainerId(), fragment)
	.commit();
	}


	void showQueueInDrawer() {
	mDrawerController.showQueueInDrawer();
	}
	}