| /* |
| * Copyright (C) 2017 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 android.car.cluster.sample; |
| |
| import android.content.Context; |
| import android.graphics.Rect; |
| import android.hardware.display.DisplayManager; |
| import android.hardware.display.DisplayManager.DisplayListener; |
| import android.hardware.display.VirtualDisplay; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.util.Log; |
| import android.view.Display; |
| import android.view.LayoutInflater; |
| import android.view.Surface; |
| import android.view.SurfaceHolder; |
| import android.view.SurfaceHolder.Callback; |
| import android.view.SurfaceView; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.ProgressBar; |
| import android.widget.TextView; |
| |
| import androidx.fragment.app.Fragment; |
| import androidx.lifecycle.ViewModelProvider; |
| import androidx.lifecycle.ViewModelProviders; |
| |
| public class NavigationFragment extends Fragment { |
| private static final String TAG = "Cluster.NavFragment"; |
| |
| private SurfaceView mSurfaceView; |
| private DisplayManager mDisplayManager; |
| private Rect mUnobscuredBounds; |
| private MainClusterActivity mMainClusterActivity; |
| private ClusterViewModel mViewModel; |
| private ProgressBar mProgressBar; |
| private TextView mMessage; |
| |
| |
| // Static because we want to keep alive this virtual display when navigating through |
| // ViewPager (this fragment gets dynamically destroyed and created) |
| private static VirtualDisplay mVirtualDisplay; |
| private static int mRegisteredNavDisplayId = Display.INVALID_DISPLAY; |
| private boolean mNavigationDisplayUpdatePending = false; |
| |
| public NavigationFragment() { |
| // Required empty public constructor |
| } |
| |
| |
| private final DisplayListener mDisplayListener = new DisplayListener() { |
| @Override |
| public void onDisplayAdded(int displayId) { |
| int navDisplayId = getVirtualDisplayId(); |
| Log.i(TAG, "onDisplayAdded, displayId: " + displayId |
| + ", navigation display id: " + navDisplayId); |
| |
| if (navDisplayId == displayId) { |
| mRegisteredNavDisplayId = displayId; |
| updateNavigationDisplay(); |
| } |
| } |
| |
| @Override |
| public void onDisplayRemoved(int displayId) { |
| if (mRegisteredNavDisplayId == displayId) { |
| mRegisteredNavDisplayId = Display.INVALID_DISPLAY; |
| updateNavigationDisplay(); |
| } |
| } |
| |
| @Override |
| public void onDisplayChanged(int displayId) {} |
| }; |
| |
| private void updateNavigationDisplay() { |
| if (mMainClusterActivity == null) { |
| // Not attached to the activity yet. Let's wait. |
| mNavigationDisplayUpdatePending = true; |
| return; |
| } |
| |
| mNavigationDisplayUpdatePending = false; |
| mMainClusterActivity.updateNavDisplay(new MainClusterActivity.VirtualDisplay( |
| mRegisteredNavDisplayId, mUnobscuredBounds)); |
| } |
| |
| @Override |
| public void onAttach(Context context) { |
| super.onAttach(context); |
| mMainClusterActivity = (MainClusterActivity) context; |
| if (mNavigationDisplayUpdatePending) { |
| updateNavigationDisplay(); |
| } |
| } |
| |
| @Override |
| public void onDetach() { |
| mMainClusterActivity = null; |
| super.onDetach(); |
| } |
| |
| @Override |
| public View onCreateView(LayoutInflater inflater, ViewGroup container, |
| Bundle savedInstanceState) { |
| Log.i(TAG, "onCreateView"); |
| ViewModelProvider provider = ViewModelProviders.of(requireActivity()); |
| mViewModel = provider.get(ClusterViewModel.class); |
| |
| mDisplayManager = getActivity().getSystemService(DisplayManager.class); |
| mDisplayManager.registerDisplayListener(mDisplayListener, new Handler()); |
| |
| // Inflate the layout for this fragment |
| View root = inflater.inflate(R.layout.fragment_navigation, container, false); |
| |
| mSurfaceView = root.findViewById(R.id.nav_surface); |
| mSurfaceView.getHolder().addCallback(new Callback() { |
| @Override |
| public void surfaceCreated(SurfaceHolder holder) { |
| Log.i(TAG, "surfaceCreated, holder: " + holder); |
| } |
| |
| @Override |
| public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { |
| Log.i(TAG, "surfaceChanged, holder: " + holder + ", size:" + width + "x" + height |
| + ", format:" + format); |
| |
| //Create dummy unobscured area to report to navigation activity. |
| mUnobscuredBounds = new Rect(40, 0, width - 80, height - 40); |
| |
| if (mVirtualDisplay == null) { |
| mVirtualDisplay = createVirtualDisplay(holder.getSurface(), width, height); |
| } else { |
| mVirtualDisplay.setSurface(holder.getSurface()); |
| } |
| } |
| |
| @Override |
| public void surfaceDestroyed(SurfaceHolder holder) { |
| Log.i(TAG, "surfaceDestroyed, holder: " + holder + ", detaching surface from" |
| + " display, surface: " + holder.getSurface()); |
| // detaching surface is similar to turning off the display |
| mVirtualDisplay.setSurface(null); |
| } |
| }); |
| mProgressBar = root.findViewById(R.id.progress_bar); |
| mMessage = root.findViewById(R.id.message); |
| |
| mViewModel.getFreeNavigationActivity().observe(this, app -> { |
| mProgressBar.setVisibility(app.mComponent != null && !app.mIsVisible ? View.VISIBLE |
| : View.GONE); |
| mMessage.setVisibility(app.mComponent == null ? View.VISIBLE : View.GONE); |
| }); |
| |
| return root; |
| } |
| |
| private VirtualDisplay createVirtualDisplay(Surface surface, int width, int height) { |
| Log.i(TAG, "createVirtualDisplay, surface: " + surface + ", width: " + width |
| + "x" + height); |
| return mDisplayManager.createVirtualDisplay("Cluster-App-VD", width, height, 160, surface, |
| DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY); |
| } |
| |
| @Override |
| public void onDestroy() { |
| super.onDestroy(); |
| Log.i(TAG, "onDestroy"); |
| } |
| |
| private int getVirtualDisplayId() { |
| return (mVirtualDisplay != null && mVirtualDisplay.getDisplay() != null) |
| ? mVirtualDisplay.getDisplay().getDisplayId() : Display.INVALID_DISPLAY; |
| } |
| } |