我从数字表盘的 Google 示例表盘中复制了大部分代码，到目前为止效果很好。 但是当我想添加背景图像时，我只看到灰色背景，而不是我存储在可绘制对象(bg.png)下的图像。 我做错了什么？
***更新**** 好吧，显然灰色是我的背景图像，但不知何故分辨率完全关闭。背景图像为 320x320(来自 google 示例的狗图像)。 我可以观察到预览图像的相同行为...我从我的表盘上截取了屏幕截图，但我只能看到背景颜色，而不是正确的预览。
public class WearWatchFaceService extends CanvasWatchFaceService {
private static final String TAG = "DigitalWatchFaceService";
private static final Typeface BOLD_TYPEFACE =
Typeface.create(Typeface.SANS_SERIF, Typeface.BOLD);
private static final Typeface NORMAL_TYPEFACE =
Typeface.create(Typeface.SANS_SERIF, Typeface.NORMAL);
/**
* Update rate in milliseconds for normal (not ambient and not mute) mode. We update twice
* a second to blink the colons.
*/
private static final long NORMAL_UPDATE_RATE_MS = 500;
/**
* Update rate in milliseconds for mute mode. We update every minute, like in ambient mode.
*/
private static final long MUTE_UPDATE_RATE_MS = TimeUnit.MINUTES.toMillis(1);
@Override
public Engine onCreateEngine() {
return new Engine();
}
private class Engine extends CanvasWatchFaceService.Engine {
static final String COLON_STRING = ":";
/** Alpha value for drawing time when in mute mode. */
static final int MUTE_ALPHA = 100;
/** Alpha value for drawing time when not in mute mode. */
static final int NORMAL_ALPHA = 255;
static final int MSG_UPDATE_TIME = 0;
/** How often {@link #mUpdateTimeHandler} ticks in milliseconds. */
long mInteractiveUpdateRateMs = NORMAL_UPDATE_RATE_MS;
/** Handler to update the time periodically in interactive mode. */
final Handler mUpdateTimeHandler = new Handler() {
@Override
public void handleMessage(Message message) {
switch (message.what) {
case MSG_UPDATE_TIME:
if (Log.isLoggable(TAG, Log.VERBOSE)) {
Log.v(TAG, "updating time");
}
invalidate();
if (shouldTimerBeRunning()) {
long timeMs = System.currentTimeMillis();
long delayMs =
mInteractiveUpdateRateMs - (timeMs % mInteractiveUpdateRateMs);
mUpdateTimeHandler.sendEmptyMessageDelayed(MSG_UPDATE_TIME, delayMs);
}
break;
}
}
};
Paint mBackgroundPaint;
Bitmap mBackgroundBitmap;
Paint mDatePaint;
Paint mHourPaint;
Paint mMinutePaint;
Paint mSecondPaint;
Paint mAmPmPaint;
Paint mColonPaint;
float mColonWidth;
boolean mMute;
Calendar mCalendar;
Date mDate;
SimpleDateFormat mDayOfWeekFormat;
java.text.DateFormat mDateFormat;
boolean mShouldDrawColons;
float mXOffset;
float mYOffset;
float mLineHeight;
int mInteractiveBackgroundColor =
R.color.default_bg;
int mInteractiveHourDigitsColor =
R.color.default_hour;
int mInteractiveMinuteDigitsColor =
R.color.default_minute;
int mInteractiveSecondDigitsColor =
R.color.default_second;
/**
* Whether the display supports fewer bits for each color in ambient mode. When true, we
* disable anti-aliasing in ambient mode.
*/
boolean mLowBitAmbient;
@Override
public void onCreate(SurfaceHolder holder) {
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "onCreate");
}
super.onCreate(holder);
// This sets the Timeformat to German ... could be removed if the Android Wear Device is initiated from a German Tablet/Phone
Locale locale = new Locale("de");
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());
setWatchFaceStyle(new WatchFaceStyle.Builder(WearWatchFaceService.this)
.setCardPeekMode(WatchFaceStyle.PEEK_MODE_VARIABLE)
.setBackgroundVisibility(WatchFaceStyle.BACKGROUND_VISIBILITY_INTERRUPTIVE)
.setShowSystemUiTime(false)
.build());
Resources resources = WearWatchFaceService.this.getResources();
mYOffset = resources.getDimension(R.dimen.digital_y_offset);
mLineHeight = resources.getDimension(R.dimen.digital_line_height);
setDefaultColors();
// Not sure why the text color needs to be set here again ... it should be set in setDefaultColors()!
mDatePaint.setColor(getColor(R.color.digital_date));
mHourPaint.setColor(getColor(R.color.default_hour));
mMinutePaint.setColor(getColor(R.color.default_minute));
mSecondPaint.setColor(getColor(R.color.default_second));
mColonPaint.setColor(getColor(R.color.digital_colons));
if(!isInAmbientMode()) {
mBackgroundBitmap = BitmapFactory.decodeResource(WearWatchFaceService.this.getResources(), R.drawable.bg);
}
mCalendar = Calendar.getInstance();
mDate = new Date();
initFormats();
}
public void setDefaultColors() {
mBackgroundPaint = new Paint();
mBackgroundPaint.setColor(getColor(mInteractiveBackgroundColor));
mDatePaint = createTextPaint(R.color.digital_date);
mHourPaint = createTextPaint(mInteractiveHourDigitsColor, BOLD_TYPEFACE);
mMinutePaint = createTextPaint(mInteractiveMinuteDigitsColor);
mSecondPaint = createTextPaint(mInteractiveSecondDigitsColor);
mColonPaint = createTextPaint(R.color.digital_colons);
}
@Override
public void onDestroy() {
mUpdateTimeHandler.removeMessages(MSG_UPDATE_TIME);
super.onDestroy();
}
private Paint createTextPaint(int defaultInteractiveColor) {
return createTextPaint(defaultInteractiveColor, NORMAL_TYPEFACE);
}
private Paint createTextPaint(int defaultInteractiveColor, Typeface typeface) {
Paint paint = new Paint();
paint.setColor(defaultInteractiveColor);
paint.setTypeface(typeface);
paint.setAntiAlias(true);
return paint;
}
@Override
public void onVisibilityChanged(boolean visible) {
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "onVisibilityChanged: " + visible);
}
super.onVisibilityChanged(visible);
// Whether the timer should be running depends on whether we're visible (as well as
// whether we're in ambient mode), so we may need to start or stop the timer.
updateTimer();
}
private void initFormats() {
mDayOfWeekFormat = new SimpleDateFormat("EEEE", Locale.getDefault());
mDayOfWeekFormat.setCalendar(mCalendar);
mDateFormat = DateFormat.getDateFormat(WearWatchFaceService.this);
mDateFormat.setCalendar(mCalendar);
}
@Override
public void onApplyWindowInsets(WindowInsets insets) {
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "onApplyWindowInsets: " + (insets.isRound() ? "round" : "square"));
}
super.onApplyWindowInsets(insets);
// Load resources that have alternate values for round watches.
Resources resources = WearWatchFaceService.this.getResources();
boolean isRound = insets.isRound();
mXOffset = resources.getDimension(isRound
? R.dimen.digital_x_offset_round : R.dimen.digital_x_offset);
float textSize = resources.getDimension(isRound
? R.dimen.digital_text_size_round : R.dimen.digital_text_size);
mDatePaint.setTextSize(resources.getDimension(R.dimen.digital_date_text_size));
mHourPaint.setTextSize(textSize);
mMinutePaint.setTextSize(textSize);
mSecondPaint.setTextSize(textSize);
mColonPaint.setTextSize(textSize);
mColonWidth = mColonPaint.measureText(COLON_STRING);
}
@Override
public void onPropertiesChanged(Bundle properties) {
super.onPropertiesChanged(properties);
boolean burnInProtection = properties.getBoolean(PROPERTY_BURN_IN_PROTECTION, false);
mHourPaint.setTypeface(burnInProtection ? NORMAL_TYPEFACE : BOLD_TYPEFACE);
mLowBitAmbient = properties.getBoolean(PROPERTY_LOW_BIT_AMBIENT, false);
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "onPropertiesChanged: burn-in protection = " + burnInProtection
+ ", low-bit ambient = " + mLowBitAmbient);
}
}
@Override
public void onTimeTick() {
super.onTimeTick();
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "onTimeTick: ambient = " + isInAmbientMode());
}
invalidate();
}
@Override
public void onAmbientModeChanged(boolean inAmbientMode) {
super.onAmbientModeChanged(inAmbientMode);
if (!isInAmbientMode()) {
mBackgroundPaint = new Paint();
mBackgroundPaint.setColor(getColor(R.color.default_bg));
mDatePaint.setColor(getColor(R.color.digital_date));
mHourPaint.setColor(getColor(R.color.default_hour));
mMinutePaint.setColor(getColor(R.color.default_minute));
mSecondPaint.setColor(getColor(R.color.default_second));
mColonPaint.setColor(getColor(R.color.digital_colons));
}
else {
mBackgroundPaint = new Paint();
mBackgroundPaint.setColor(getColor(R.color.ambient_bg));
mDatePaint.setColor(getColor(R.color.digital_date));
mHourPaint.setColor(getColor(R.color.ambient_hour));
mMinutePaint.setColor(getColor(R.color.ambient_minute));
mSecondPaint.setColor(getColor(R.color.ambient_second));
mColonPaint.setColor(getColor(R.color.digital_colons));
}
Log.d("XXX", "onAmbientModeChanged: " + inAmbientMode);
if (mLowBitAmbient) {
boolean antiAlias = !inAmbientMode;
mDatePaint.setAntiAlias(antiAlias);
mHourPaint.setAntiAlias(antiAlias);
mMinutePaint.setAntiAlias(antiAlias);
mSecondPaint.setAntiAlias(antiAlias);
mAmPmPaint.setAntiAlias(antiAlias);
mColonPaint.setAntiAlias(antiAlias);
}
invalidate();
// Whether the timer should be running depends on whether we're in ambient mode (as well
// as whether we're visible), so we may need to start or stop the timer.
updateTimer();
}
@Override
public void onInterruptionFilterChanged(int interruptionFilter) {
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "onInterruptionFilterChanged: " + interruptionFilter);
}
super.onInterruptionFilterChanged(interruptionFilter);
boolean inMuteMode = interruptionFilter == WatchFaceService.INTERRUPTION_FILTER_NONE;
// We only need to update once a minute in mute mode.
setInteractiveUpdateRateMs(inMuteMode ? MUTE_UPDATE_RATE_MS : NORMAL_UPDATE_RATE_MS);
if (mMute != inMuteMode) {
mMute = inMuteMode;
int alpha = inMuteMode ? MUTE_ALPHA : NORMAL_ALPHA;
mDatePaint.setAlpha(alpha);
mHourPaint.setAlpha(alpha);
mMinutePaint.setAlpha(alpha);
mColonPaint.setAlpha(alpha);
mAmPmPaint.setAlpha(alpha);
invalidate();
}
}
public void setInteractiveUpdateRateMs(long updateRateMs) {
if (updateRateMs == mInteractiveUpdateRateMs) {
return;
}
mInteractiveUpdateRateMs = updateRateMs;
// Stop and restart the timer so the new update rate takes effect immediately.
if (shouldTimerBeRunning()) {
updateTimer();
}
}
private String formatTwoDigitNumber(int hour) {
return String.format("%02d", hour);
}
@Override
public void onDraw(Canvas canvas, Rect bounds) {
long now = System.currentTimeMillis();
int width = bounds.width();
int height = bounds.height();
mCalendar.setTimeInMillis(now);
mDate.setTime(now);
boolean is24Hour = DateFormat.is24HourFormat(WearWatchFaceService.this);
// Draw the background.
canvas.drawRect(0, 0, bounds.width(), bounds.height(), mBackgroundPaint);
//Draw the background Image
if (mBackgroundBitmap == null
|| mBackgroundBitmap.getWidth() != width
|| mBackgroundBitmap.getHeight() != height) {
mBackgroundBitmap = Bitmap.createScaledBitmap(mBackgroundBitmap,
width, height, true /* filter */);
}
if (isInAmbientMode() && (mLowBitAmbient)) {
canvas.drawColor(Color.BLACK);
} else if (isInAmbientMode()) {
canvas.drawBitmap(mBackgroundBitmap, 0, 0, mBackgroundPaint);
} else {
canvas.drawBitmap(mBackgroundBitmap, 0, 0, mBackgroundPaint);
}
// Show colons for the first half of each second so the colons blink on when the time updates.
mShouldDrawColons = (System.currentTimeMillis() % 1000) < 500;
// Draw the hours.
float x = mXOffset;
String hourString;
if (is24Hour) {
hourString = formatTwoDigitNumber(mCalendar.get(Calendar.HOUR_OF_DAY));
} else {
int hour = mCalendar.get(Calendar.HOUR);
if (hour == 0) {
hour = 12;
}
hourString = String.valueOf(hour);
}
canvas.drawText(hourString, x, mYOffset, mHourPaint);
x += mHourPaint.measureText(hourString);
// In ambient and mute modes, always draw the first colon. Otherwise, draw the
// first colon for the first half of each second.
if (isInAmbientMode() || mMute || mShouldDrawColons) {
canvas.drawText(COLON_STRING, x, mYOffset, mColonPaint);
}
x += mColonWidth;
// Draw the minutes.
String minuteString = formatTwoDigitNumber(mCalendar.get(Calendar.MINUTE));
canvas.drawText(minuteString, x, mYOffset, mMinutePaint);
x += mMinutePaint.measureText(minuteString);
// In unmuted interactive mode, draw a second blinking colon followed by the seconds.
// Otherwise, if we're in 12-hour mode, draw AM/PM
if (!isInAmbientMode() && !mMute) {
if (mShouldDrawColons) {
canvas.drawText(COLON_STRING, x, mYOffset, mColonPaint);
}
x += mColonWidth;
canvas.drawText(formatTwoDigitNumber(
mCalendar.get(Calendar.SECOND)), x, mYOffset, mSecondPaint);
} else if (!is24Hour) {
x += mColonWidth;
}
// Only render the day of week and date if there is no peek card, so they do not bleed
// into each other in ambient mode.
if (getPeekCardPosition().isEmpty()) {
// Day of week
canvas.drawText(
mDayOfWeekFormat.format(mDate),
mXOffset, mYOffset + mLineHeight, mDatePaint);
// Date
canvas.drawText(
mDateFormat.format(mDate),
mXOffset, mYOffset + mLineHeight * 2, mDatePaint);
}
}
/**
* Starts the {@link #mUpdateTimeHandler} timer if it should be running and isn't currently
* or stops it if it shouldn't be running but currently is.
*/
private void updateTimer() {
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, "updateTimer");
}
mUpdateTimeHandler.removeMessages(MSG_UPDATE_TIME);
if (shouldTimerBeRunning()) {
mUpdateTimeHandler.sendEmptyMessage(MSG_UPDATE_TIME);
}
}
/**
* Returns whether the {@link #mUpdateTimeHandler} timer should be running. The timer should
* only run when we're visible and in interactive mode.
*/
private boolean shouldTimerBeRunning() {
return isVisible() && !isInAmbientMode();
}
}
}
最佳答案
好的，代码没问题，但图像位于“anydpi-folder”中，显然它没有显示。我将图像移至“nodpi-folder”，效果很好。 这里是nodpi和anydpi区别的链接
关于java - Android Wear 背景图像未绘制，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39368800/