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      1 package androidx.leanback.widget;
      2 
      3 import android.content.Context;
      4 import android.content.res.Resources;
      5 import android.graphics.Color;
      6 import android.util.AttributeSet;
      7 
      8 import androidx.leanback.R;
      9 
     10 /**
     11  * A subclass of {@link SearchOrbView} that visualizes the state of an ongoing speech recognition.
     12  */
     13 public class SpeechOrbView extends SearchOrbView {
     14     private final float mSoundLevelMaxZoom;
     15     private Colors mListeningOrbColors;
     16     private Colors mNotListeningOrbColors;
     17 
     18     private int mCurrentLevel = 0;
     19     private boolean mListening = false;
     20 
     21     public SpeechOrbView(Context context) {
     22         this(context, null);
     23     }
     24 
     25     public SpeechOrbView(Context context, AttributeSet attrs) {
     26         this(context, attrs, 0);
     27     }
     28 
     29     public SpeechOrbView(Context context, AttributeSet attrs, int defStyle) {
     30         super(context, attrs, defStyle);
     31 
     32         Resources resources = context.getResources();
     33         mSoundLevelMaxZoom =
     34                 resources.getFraction(R.fraction.lb_search_bar_speech_orb_max_level_zoom, 1, 1);
     35 
     36         mNotListeningOrbColors = new Colors(resources.getColor(R.color.lb_speech_orb_not_recording),
     37                 resources.getColor(R.color.lb_speech_orb_not_recording_pulsed),
     38                 resources.getColor(R.color.lb_speech_orb_not_recording_icon));
     39         mListeningOrbColors = new Colors(resources.getColor(R.color.lb_speech_orb_recording),
     40                 resources.getColor(R.color.lb_speech_orb_recording),
     41                 Color.TRANSPARENT);
     42 
     43         showNotListening();
     44     }
     45 
     46     @Override
     47     int getLayoutResourceId() {
     48         return R.layout.lb_speech_orb;
     49     }
     50 
     51     /**
     52      * Sets default listening state orb color.
     53      *
     54      * @param colors SearchOrbView.Colors.
     55      */
     56     public void setListeningOrbColors(Colors colors) {
     57         mListeningOrbColors = colors;
     58     }
     59 
     60     /**
     61      * Sets default not-listening state orb color.
     62      *
     63      * @param colors SearchOrbView.Colors.
     64      */
     65     public void setNotListeningOrbColors(Colors colors) {
     66         mNotListeningOrbColors = colors;
     67     }
     68 
     69     /**
     70      * Sets the view to display listening state.
     71      */
     72     public void showListening() {
     73         setOrbColors(mListeningOrbColors);
     74         setOrbIcon(getResources().getDrawable(R.drawable.lb_ic_search_mic));
     75         // Assume focused
     76         animateOnFocus(true);
     77         enableOrbColorAnimation(false);
     78         scaleOrbViewOnly(1f);
     79         mCurrentLevel = 0;
     80         mListening = true;
     81     }
     82 
     83     /**
     84      * Sets the view to display the not-listening state.
     85      */
     86     public void showNotListening() {
     87         setOrbColors(mNotListeningOrbColors);
     88         setOrbIcon(getResources().getDrawable(R.drawable.lb_ic_search_mic_out));
     89         animateOnFocus(hasFocus());
     90         scaleOrbViewOnly(1f);
     91         mListening = false;
     92     }
     93 
     94     /**
     95      * Sets the sound level while listening to speech.
     96      */
     97     public void setSoundLevel(int level) {
     98         if (!mListening) return;
     99 
    100         // Either ease towards the target level, or decay away from it depending on whether
    101         // its higher or lower than the current.
    102         if (level > mCurrentLevel) {
    103             mCurrentLevel = mCurrentLevel + ((level - mCurrentLevel) / 2);
    104         } else {
    105             mCurrentLevel = (int) (mCurrentLevel * 0.7f);
    106         }
    107 
    108         float zoom = 1f + (mSoundLevelMaxZoom - getFocusedZoom()) * mCurrentLevel / 100;
    109 
    110         scaleOrbViewOnly(zoom);
    111     }
    112 }
    113