android.view.View#setKeepScreenOn ( )源码实例Demo

@Override
public void onShowCustomView(View view, int requestedOrientation, CustomViewCallback callback) {
	if (view == null) {
		return;
	}
	if (mCustomView != null && callback != null) {
		callback.onCustomViewHidden();
		return;
	}
	try {
		view.setKeepScreenOn(true);
	} catch (SecurityException e) {
		Log.e(Constants.TAG, "WebView is not allowed to keep the screen on");
	}
	mOriginalOrientation = getRequestedOrientation();
	FrameLayout decor = (FrameLayout) getWindow().getDecorView();
	mFullscreenContainer = new FullscreenHolder(this);
	mCustomView = view;
	mFullscreenContainer.addView(mCustomView, COVER_SCREEN_PARAMS);
	decor.addView(mFullscreenContainer, COVER_SCREEN_PARAMS);
	setFullscreen(true);
	getCurrentWebView().setVisibility(View.GONE);
	if (view instanceof FrameLayout) {
		if (((FrameLayout) view).getFocusedChild() instanceof VideoView) {
			mVideoView = (VideoView) ((FrameLayout) view).getFocusedChild();
			mVideoView.setOnErrorListener(new VideoCompletionListener());
			mVideoView.setOnCompletionListener(new VideoCompletionListener());
		}
	}
	mCustomViewCallback = callback;
}
 

@Override
public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {
	View view = viewToKeepScreenOn.get();

	if (view == null) {
		return;
	}

	if (playbackState == Player.STATE_IDLE || playbackState == Player.STATE_ENDED || !playWhenReady) {
		view.setKeepScreenOn(false);
	} else {
		// This prevents the screen from getting dim/lock
		view.setKeepScreenOn(true);
	}
}
 

@CalledByNative
private void removeBlock() {
    // mKeepScreenOnView may be null since it's possible that |applyBlock()| was
    // not invoked due to having failed to get a view to call |setKeepScrenOn| on.
    if (mKeepScreenOnView == null) return;
    View view = mKeepScreenOnView.get();
    mKeepScreenOnView = null;
    if (view == null) return;

    view.setKeepScreenOn(false);
}
 

public void checkPreferencesChanges() {
    boolean screenOn = PreferenceManager
            .getDefaultSharedPreferences(getActivity()).getBoolean("pref_force_screen_on", false);
    boolean dyslexic = PreferenceManager
            .getDefaultSharedPreferences(getActivity()).getBoolean("pref_opendyslexic", false);

    ViewSwitcher switcher = getActivity().findViewById(R.id.switcher);
    View lrcView = getActivity().findViewById(R.id.lrc_view);

    if (switcher != null) {
        switcher.setKeepScreenOn(screenOn);
        if (switcher.getCurrentView() != null && switcher.getCurrentView() instanceof ViewGroup) {
            changeTypefaceForAllChildren((ViewGroup) switcher.getCurrentView(), dyslexic ? "dyslexic" : "light");
        }
    }

    if (lrcView != null)
        lrcView.setKeepScreenOn(screenOn);
    SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
    TypedValue outValue = new TypedValue();
    MainActivity mainActivity = (MainActivity) getActivity();
    mainActivity.getTheme().resolveAttribute(R.attr.themeName, outValue, false);
    if ("Night".equals(outValue.string) != NightTimeVerifier.check(getActivity()) ||
            mainActivity.themeNum != Integer.valueOf(sharedPrefs.getString("pref_theme", "0"))) {
        getActivity().finish();
        Intent intent = new Intent(getActivity(), MainActivity.class);
        intent.setAction("android.intent.action.MAIN");
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        startActivity(intent);
        getActivity().overridePendingTransition(0, 0);
    }
}
 

@Override
public void onCreate(Bundle icicle) {
	super.onCreate(icicle);
	this.requestWindowFeature(Window.FEATURE_NO_TITLE);
	Bundle b = getIntent().getExtras();
	mAudioUrl = b.getString("mediaUrl");
	String backgroundColor = b.getString("bgColor");
	String backgroundImagePath = b.getString("bgImage");
	String backgroundImageScale = b.getString("bgImageScale");
	mShouldAutoClose = b.getBoolean("shouldAutoClose", true);
	backgroundImageScale = backgroundImageScale == null ? "center" : backgroundImageScale.toLowerCase();
	ImageView.ScaleType bgImageScaleType;
	// Default background to black
	int bgColor = Color.BLACK;
	if (backgroundColor != null) {
		bgColor = Color.parseColor(backgroundColor);
	}

	if (backgroundImageScale.equals("fit")) {
		bgImageScaleType = ImageView.ScaleType.FIT_CENTER;
	} else if (backgroundImageScale.equals("stretch")) {
		bgImageScaleType = ImageView.ScaleType.FIT_XY;
	} else {
		bgImageScaleType = ImageView.ScaleType.CENTER;
	}

	RelativeLayout audioView = new RelativeLayout(this);
	audioView.setBackgroundColor(bgColor);

	if (backgroundImagePath != null) {
		ImageView bgImage = new ImageView(this);
		new ImageLoadTask(backgroundImagePath, bgImage, getApplicationContext()).execute(null, null);
		RelativeLayout.LayoutParams bgImageLayoutParam = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
		bgImageLayoutParam.addRule(RelativeLayout.CENTER_IN_PARENT);
		bgImage.setLayoutParams(bgImageLayoutParam);
		bgImage.setScaleType(bgImageScaleType);
		audioView.addView(bgImage);
	}

	RelativeLayout.LayoutParams relLayoutParam = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
	mMediaControllerView = new View(this);
	audioView.addView(mMediaControllerView);
	setContentView(audioView, relLayoutParam);


	// stop the screen from going to sleep. keepawake parameter from javascript. default is true.
	mMediaControllerView.setKeepScreenOn(true);
	Boolean keepAwake = b.getBoolean("keepAwake", true);
	if (keepAwake == false) {
		mMediaControllerView.setKeepScreenOn(false);
	} 

	play();
}