Home | History | Annotate | Download | only in media 
      1 package com.android.car.media;
      2 
      3 import android.os.Bundle;
      4 import android.os.Handler;
      5 import android.support.v4.app.Fragment;
      6 import android.util.Log;
      7 import android.view.LayoutInflater;
      8 import android.view.View;
      9 import android.view.ViewGroup;
     10 import android.widget.ImageView;
     11 import android.widget.ProgressBar;
     12 import android.widget.TextView;
     13 
     14 import com.android.car.media.common.MediaSource;
     15 import com.android.car.media.widgets.ViewUtils;
     16 
     17 /**
     18  * Empty fragment to show while we are loading content
     19  */
     20 public class EmptyFragment extends Fragment {
     21     private ProgressBar mProgressBar;
     22     private ImageView mErrorIcon;
     23     private TextView mErrorMessage;
     24 
     25     private int mProgressBarDelay;
     26     private Handler mHandler = new Handler();
     27     private int mFadeDuration;
     28     private MediaActivity.BrowseState mState = MediaActivity.BrowseState.EMPTY;
     29     private MediaSource mMediaSource;
     30     private Runnable mProgressIndicatorRunnable = new Runnable() {
     31         @Override
     32         public void run() {
     33             ViewUtils.showViewAnimated(mProgressBar, mFadeDuration);
     34         }
     35     };
     36     @Override
     37     public View onCreateView(LayoutInflater inflater, final ViewGroup container,
     38             Bundle savedInstanceState) {
     39         View view = inflater.inflate(R.layout.fragment_empty, container, false);
     40         mProgressBar = view.findViewById(R.id.loading_spinner);
     41         mProgressBarDelay = getContext().getResources()
     42                 .getInteger(R.integer.progress_indicator_delay);
     43         mFadeDuration = getContext().getResources().getInteger(
     44                 R.integer.new_album_art_fade_in_duration);
     45         mErrorIcon = view.findViewById(R.id.error_icon);
     46         mErrorMessage = view.findViewById(R.id.error_message);
     47         update();
     48         return view;
     49     }
     50 
     51     @Override
     52     public void onPause() {
     53         super.onPause();
     54         mHandler.removeCallbacks(mProgressIndicatorRunnable);
     55     }
     56 
     57     /**
     58      * Updates the state of this fragment
     59      *
     60      * @param state browsing state to display
     61      * @param mediaSource media source currently being browsed
     62      */
     63     public void setState(MediaActivity.BrowseState state, MediaSource mediaSource) {
     64         mHandler.removeCallbacks(mProgressIndicatorRunnable);
     65         mMediaSource = mediaSource;
     66         mState = state;
     67         if (this.getView() != null) {
     68             update();
     69         }
     70     }
     71 
     72     private void update() {
     73         switch (mState) {
     74             case LOADING:
     75                 // Display the indicator after a certain time, to avoid flashing the indicator
     76                 // constantly, even when performance is acceptable.
     77                 mHandler.postDelayed(mProgressIndicatorRunnable, mProgressBarDelay);
     78                 mErrorIcon.setVisibility(View.GONE);
     79                 mErrorMessage.setVisibility(View.GONE);
     80                 break;
     81             case ERROR:
     82                 mProgressBar.setVisibility(View.GONE);
     83                 mErrorIcon.setVisibility(View.VISIBLE);
     84                 mErrorMessage.setVisibility(View.VISIBLE);
     85                 mErrorMessage.setText(getContext().getString(
     86                         R.string.cannot_connect_to_app,
     87                         mMediaSource != null
     88                                 ? mMediaSource.getName()
     89                                 : getContext().getString(R.string.unknown_media_provider_name)));
     90                 break;
     91             case EMPTY:
     92                 mProgressBar.setVisibility(View.GONE);
     93                 mErrorIcon.setVisibility(View.GONE);
     94                 mErrorMessage.setVisibility(View.VISIBLE);
     95                 mErrorMessage.setText(getContext().getString(R.string.nothing_to_play));
     96                 break;
     97             default:
     98                 // Fail fast on any other state.
     99                 throw new IllegalStateException("Invalid state for this fragment: " + mState);
    100         }
    101     }
    102 }
    103