下面列出了android.view.Display#STATE_OFF 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* Sets the level of the electron beam steering current.
*
* The display is blanked when the level is 0.0. In normal use, the electron
* beam should have a value of 1.0. The electron beam is unstable in between
* these states and the picture quality may be compromised. For best effect,
* the electron beam should be warmed up or cooled off slowly.
*
* Warning: Electron beam emits harmful radiation. Avoid direct exposure to
* skin or eyes.
*
* @param level The level, ranges from 0.0 (full off) to 1.0 (full on).
*/
public void setColorFadeLevel(float level) {
if (mColorFadeLevel != level) {
if (DEBUG) {
Slog.d(TAG, "setColorFadeLevel: level=" + level);
}
mColorFadeLevel = level;
if (mScreenState != Display.STATE_OFF) {
mScreenReady = false;
scheduleScreenUpdate(); // update backlight brightness
}
if (mColorFadePrepared) {
mColorFadeReady = false;
scheduleColorFadeDraw();
}
}
}
private boolean isScreenOn() {
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
DisplayManager dm = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
boolean screenOn = false;
for (Display display : dm.getDisplays()) {
if (display.getState() != Display.STATE_OFF) {
screenOn = true;
}
}
return screenOn;
} else {
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
//noinspection deprecation
return pm.isScreenOn();
}
}
@Override
public void initPowerManagement(final DisplayPowerCallbacks callbacks, Handler handler,
SensorManager sensorManager) {
synchronized (mSyncRoot) {
DisplayBlanker blanker = new DisplayBlanker() {
@Override
public void requestDisplayState(int state, int brightness) {
// The order of operations is important for legacy reasons.
if (state == Display.STATE_OFF) {
requestGlobalDisplayStateInternal(state, brightness);
}
callbacks.onDisplayStateChange(state);
if (state != Display.STATE_OFF) {
requestGlobalDisplayStateInternal(state, brightness);
}
}
};
mDisplayPowerController = new DisplayPowerController(
mContext, callbacks, handler, sensorManager, blanker);
}
mHandler.sendEmptyMessage(MSG_LOAD_BRIGHTNESS_CONFIGURATION);
}
@Override
public void onDisplayStateChange(int state) {
// This method is only needed to support legacy display blanking behavior
// where the display's power state is coupled to suspend or to the power HAL.
// The order of operations matters here.
synchronized (mLock) {
if (mDisplayState != state) {
mDisplayState = state;
if (state == Display.STATE_OFF) {
if (!mDecoupleHalInteractiveModeFromDisplayConfig) {
setHalInteractiveModeLocked(false);
}
if (!mDecoupleHalAutoSuspendModeFromDisplayConfig) {
setHalAutoSuspendModeLocked(true);
}
} else {
if (!mDecoupleHalAutoSuspendModeFromDisplayConfig) {
setHalAutoSuspendModeLocked(false);
}
if (!mDecoupleHalInteractiveModeFromDisplayConfig) {
setHalInteractiveModeLocked(true);
}
}
}
}
}
@Override
public void setDozeOverrideFromDreamManager(int screenState, int screenBrightness) {
switch (screenState) {
case Display.STATE_UNKNOWN:
case Display.STATE_OFF:
case Display.STATE_DOZE:
case Display.STATE_DOZE_SUSPEND:
case Display.STATE_ON_SUSPEND:
case Display.STATE_ON:
case Display.STATE_VR:
break;
default:
screenState = Display.STATE_UNKNOWN;
break;
}
if (screenBrightness < PowerManager.BRIGHTNESS_DEFAULT
|| screenBrightness > PowerManager.BRIGHTNESS_ON) {
screenBrightness = PowerManager.BRIGHTNESS_DEFAULT;
}
setDozeOverrideFromDreamManagerInternal(screenState, screenBrightness);
}
void reportVisibility() {
if (!mDestroyed) {
mDisplayState = mDisplay == null ? Display.STATE_UNKNOWN : mDisplay.getState();
boolean visible = mVisible && mDisplayState != Display.STATE_OFF;
if (mReportedVisible != visible) {
mReportedVisible = visible;
if (DEBUG) Log.v(TAG, "onVisibilityChanged(" + visible
+ "): " + this);
if (visible) {
// If becoming visible, in preview mode the surface
// may have been destroyed so now we need to make
// sure it is re-created.
doOffsetsChanged(false);
updateSurface(false, false, false);
}
onVisibilityChanged(visible);
}
}
}
public boolean isScreenOn(Context context)
{
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH)
{
DisplayManager dm = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
boolean screenOn = false;
for (Display display : dm.getDisplays())
{
if (display.getState() != Display.STATE_OFF)
{
screenOn = true;
}
}
return screenOn;
} else
{
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
//noinspection deprecation
return pm.isScreenOn();
}
}
/**
* Is the screen of the device on.
*
* @param context the context
* @return true when (at least one) screen is on
*/
public boolean isScreenOn(Context context) {
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
DisplayManager dm = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
boolean screenOn = false;
for (Display display : dm.getDisplays()) {
if (display.getState() != Display.STATE_OFF) {
screenOn = true;
}
}
return screenOn;
} else {
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
return pm.isScreenOn();
}
}
/**
* Sets the display brightness.
*
* @param brightness The brightness, ranges from 0 (minimum / off) to 255 (brightest).
*/
public void setScreenBrightness(int brightness) {
if (mScreenBrightness != brightness) {
if (DEBUG) {
Slog.d(TAG, "setScreenBrightness: brightness=" + brightness);
}
mScreenBrightness = brightness;
if (mScreenState != Display.STATE_OFF) {
mScreenReady = false;
scheduleScreenUpdate();
}
}
}
static int getPowerModeForState(int state) {
switch (state) {
case Display.STATE_OFF:
return SurfaceControl.POWER_MODE_OFF;
case Display.STATE_DOZE:
return SurfaceControl.POWER_MODE_DOZE;
case Display.STATE_DOZE_SUSPEND:
return SurfaceControl.POWER_MODE_DOZE_SUSPEND;
case Display.STATE_ON_SUSPEND:
return SurfaceControl.POWER_MODE_ON_SUSPEND;
default:
return SurfaceControl.POWER_MODE_NORMAL;
}
}
public static boolean isScreenOn(Context context) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
DisplayManager dm = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
for (Display display : dm.getDisplays()) {
if (display.getState() != Display.STATE_OFF) {
return true;
}
}
return false;
} else {
PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
return powerManager.isScreenOn();
}
}
private void debugScreenPowerState() {
String isDeviceIdleMode = "unknow"; // --- API 23
String isIgnoringBatteryOptimizations = "unknow"; // --- API 23
String isPowerSaveMode = "unknow"; // --- API 21
String isInteractive = "unknow"; // --- API 20 ( before since API 7 is: isScreenOn())
String screenState = "unknow"; // --- API 20
if (Build.VERSION.SDK_INT >= 23) {
isDeviceIdleMode = String.format("%s", mPowerManager.isDeviceIdleMode());
isIgnoringBatteryOptimizations = String.format("%s", mPowerManager.isIgnoringBatteryOptimizations(mPackageName));
}
if (Build.VERSION.SDK_INT >= 21) {
isPowerSaveMode = String.format("%s", mPowerManager.isPowerSaveMode());
}
if (Build.VERSION.SDK_INT >= 20) {
isInteractive = String.format("%s", mPowerManager.isInteractive());
Display display = mWindowManager.getDefaultDisplay();
switch (display.getState()) {
case Display.STATE_OFF:
screenState = "STATE_OFF";
break;
case Display.STATE_ON:
screenState = "STATE_ON";
break;
case Display.STATE_DOZE:
screenState = "STATE_DOZE";
break;
case Display.STATE_DOZE_SUSPEND:
screenState = "STATE_DOZE_SUSPEND";
break;
default:
break;
}
} else {
isInteractive = String.format("%s", mPowerManager.isScreenOn());
}
Log.d(TAG, String.format("debugScreenPowerState(): screenState='%s', isInteractive='%s', isPowerSaveMode='%s', isDeviceIdleMode='%s', isIgnoringBatteryOptimizations='%s'", screenState, isInteractive, isPowerSaveMode, isDeviceIdleMode, isIgnoringBatteryOptimizations));
}
public static boolean isScreenOn(Context context) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
DisplayManager dm = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
for (Display display : dm.getDisplays()) {
if (display.getState() != Display.STATE_OFF) {
return true;
}
}
return false;
} else {
PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
return powerManager.isScreenOn();
}
}
private boolean isScreenOn(Context context) {
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
@SuppressLint("WrongConstant") DisplayManager dm = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
boolean screenOn = false;
for (Display display : dm.getDisplays()) {
if (display.getState() != Display.STATE_OFF) {
screenOn = true;
}
}
return screenOn;
} else {
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
return pm.isScreenOn();
}
}
public static boolean isScreenOn(Context context)
{
DisplayManager dm = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
for (Display display : dm.getDisplays())
{
if (display.getState() != Display.STATE_OFF)
return true;
}
return false;
}
boolean isScreenOn() {
if (Utils.isAndroidNewerThanL()) {
DisplayManager dm = (DisplayManager) getSystemService(Context.DISPLAY_SERVICE);
for (Display display : dm.getDisplays()) {
if (display.getState() != Display.STATE_OFF) {
return true;
}
}
return false;
} else {
PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);
return powerManager.isScreenOn();
}
}
private boolean isDisplayOn(Context context) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
DisplayManager dm = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
for (Display display : dm.getDisplays()) {
if (display.getState() != Display.STATE_OFF) {
return true;
}
}
return false;
} else {
PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
return powerManager.isScreenOn();
}
}
private void requestGlobalDisplayStateInternal(int state, int brightness) {
if (state == Display.STATE_UNKNOWN) {
state = Display.STATE_ON;
}
if (state == Display.STATE_OFF) {
brightness = PowerManager.BRIGHTNESS_OFF;
} else if (brightness < 0) {
brightness = PowerManager.BRIGHTNESS_DEFAULT;
} else if (brightness > PowerManager.BRIGHTNESS_ON) {
brightness = PowerManager.BRIGHTNESS_ON;
}
synchronized (mTempDisplayStateWorkQueue) {
try {
// Update the display state within the lock.
// Note that we do not need to schedule traversals here although it
// may happen as a side-effect of displays changing state.
synchronized (mSyncRoot) {
if (mGlobalDisplayState == state
&& mGlobalDisplayBrightness == brightness) {
return; // no change
}
Trace.traceBegin(Trace.TRACE_TAG_POWER, "requestGlobalDisplayState("
+ Display.stateToString(state)
+ ", brightness=" + brightness + ")");
mGlobalDisplayState = state;
mGlobalDisplayBrightness = brightness;
applyGlobalDisplayStateLocked(mTempDisplayStateWorkQueue);
}
// Setting the display power state can take hundreds of milliseconds
// to complete so we defer the most expensive part of the work until
// after we have exited the critical section to avoid blocking other
// threads for a long time.
for (int i = 0; i < mTempDisplayStateWorkQueue.size(); i++) {
mTempDisplayStateWorkQueue.get(i).run();
}
Trace.traceEnd(Trace.TRACE_TAG_POWER);
} finally {
mTempDisplayStateWorkQueue.clear();
}
}
}
private boolean setScreenState(int state, boolean reportOnly) {
final boolean isOff = (state == Display.STATE_OFF);
if (mPowerState.getScreenState() != state) {
// If we are trying to turn screen off, give policy a chance to do something before we
// actually turn the screen off.
if (isOff && !mScreenOffBecauseOfProximity) {
if (mReportedScreenStateToPolicy == REPORTED_TO_POLICY_SCREEN_ON) {
setReportedScreenState(REPORTED_TO_POLICY_SCREEN_TURNING_OFF);
blockScreenOff();
mWindowManagerPolicy.screenTurningOff(mPendingScreenOffUnblocker);
unblockScreenOff();
} else if (mPendingScreenOffUnblocker != null) {
// Abort doing the state change until screen off is unblocked.
return false;
}
}
if (!reportOnly) {
Trace.traceCounter(Trace.TRACE_TAG_POWER, "ScreenState", state);
mPowerState.setScreenState(state);
// Tell battery stats about the transition.
try {
mBatteryStats.noteScreenState(state);
} catch (RemoteException ex) {
// same process
}
}
}
// Tell the window manager policy when the screen is turned off or on unless it's due
// to the proximity sensor. We temporarily block turning the screen on until the
// window manager is ready by leaving a black surface covering the screen.
// This surface is essentially the final state of the color fade animation and
// it is only removed once the window manager tells us that the activity has
// finished drawing underneath.
if (isOff && mReportedScreenStateToPolicy != REPORTED_TO_POLICY_SCREEN_OFF
&& !mScreenOffBecauseOfProximity) {
setReportedScreenState(REPORTED_TO_POLICY_SCREEN_OFF);
unblockScreenOn();
mWindowManagerPolicy.screenTurnedOff();
} else if (!isOff
&& mReportedScreenStateToPolicy == REPORTED_TO_POLICY_SCREEN_TURNING_OFF) {
// We told policy already that screen was turning off, but now we changed our minds.
// Complete the full state transition on -> turningOff -> off.
unblockScreenOff();
mWindowManagerPolicy.screenTurnedOff();
setReportedScreenState(REPORTED_TO_POLICY_SCREEN_OFF);
}
if (!isOff && mReportedScreenStateToPolicy == REPORTED_TO_POLICY_SCREEN_OFF) {
setReportedScreenState(REPORTED_TO_POLICY_SCREEN_TURNING_ON);
if (mPowerState.getColorFadeLevel() == 0.0f) {
blockScreenOn();
} else {
unblockScreenOn();
}
mWindowManagerPolicy.screenTurningOn(mPendingScreenOnUnblocker);
}
// Return true if the screen isn't blocked.
return mPendingScreenOnUnblocker == null;
}
@Override
public DisplayDeviceInfo getDisplayDeviceInfoLocked() {
if (mInfo == null) {
mInfo = new DisplayDeviceInfo();
mInfo.name = mName;
mInfo.uniqueId = getUniqueId();
mInfo.width = mWidth;
mInfo.height = mHeight;
mInfo.modeId = mMode.getModeId();
mInfo.defaultModeId = mMode.getModeId();
mInfo.supportedModes = new Display.Mode[] { mMode };
mInfo.densityDpi = mDensityDpi;
mInfo.xDpi = mDensityDpi;
mInfo.yDpi = mDensityDpi;
mInfo.presentationDeadlineNanos = 1000000000L / (int) REFRESH_RATE; // 1 frame
mInfo.flags = 0;
if ((mFlags & VIRTUAL_DISPLAY_FLAG_PUBLIC) == 0) {
mInfo.flags |= DisplayDeviceInfo.FLAG_PRIVATE
| DisplayDeviceInfo.FLAG_NEVER_BLANK;
}
if ((mFlags & VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR) != 0) {
mInfo.flags &= ~DisplayDeviceInfo.FLAG_NEVER_BLANK;
} else {
mInfo.flags |= DisplayDeviceInfo.FLAG_OWN_CONTENT_ONLY;
}
if ((mFlags & VIRTUAL_DISPLAY_FLAG_SECURE) != 0) {
mInfo.flags |= DisplayDeviceInfo.FLAG_SECURE;
}
if ((mFlags & VIRTUAL_DISPLAY_FLAG_PRESENTATION) != 0) {
mInfo.flags |= DisplayDeviceInfo.FLAG_PRESENTATION;
if ((mFlags & VIRTUAL_DISPLAY_FLAG_PUBLIC) != 0) {
// For demonstration purposes, allow rotation of the external display.
// In the future we might allow the user to configure this directly.
if ("portrait".equals(SystemProperties.get(
"persist.demo.remoterotation"))) {
mInfo.rotation = Surface.ROTATION_270;
}
}
}
if ((mFlags & VIRTUAL_DISPLAY_FLAG_CAN_SHOW_WITH_INSECURE_KEYGUARD) != 0) {
mInfo.flags |= DisplayDeviceInfo.FLAG_CAN_SHOW_WITH_INSECURE_KEYGUARD;
}
if ((mFlags & VIRTUAL_DISPLAY_FLAG_ROTATES_WITH_CONTENT) != 0) {
mInfo.flags |= DisplayDeviceInfo.FLAG_ROTATES_WITH_CONTENT;
}
if ((mFlags & VIRTUAL_DISPLAY_FLAG_DESTROY_CONTENT_ON_REMOVAL) != 0) {
mInfo.flags |= DisplayDeviceInfo.FLAG_DESTROY_CONTENT_ON_REMOVAL;
}
mInfo.type = Display.TYPE_VIRTUAL;
mInfo.touch = ((mFlags & VIRTUAL_DISPLAY_FLAG_SUPPORTS_TOUCH) == 0) ?
DisplayDeviceInfo.TOUCH_NONE : DisplayDeviceInfo.TOUCH_VIRTUAL;
mInfo.state = mSurface != null ? Display.STATE_ON : Display.STATE_OFF;
mInfo.ownerUid = mOwnerUid;
mInfo.ownerPackageName = mOwnerPackageName;
}
return mInfo;
}