Android 安卓系统屏幕亮度
我正在开发一个应用程序,它可以打开屏幕(如果已禁用),并将屏幕亮度更改为255。一切正常。设备亮度达到最大值。但是经过很小的延迟(例如5秒),亮度必须恢复到以前的值。但此值仅在阻塞设备后影响,不会立即作为最大值的设置。我怎样才能立即影响价值 对我的英语很抱歉 更新Android 安卓系统屏幕亮度,android,screen,brightness,Android,Screen,Brightness,我正在开发一个应用程序,它可以打开屏幕(如果已禁用),并将屏幕亮度更改为255。一切正常。设备亮度达到最大值。但是经过很小的延迟(例如5秒),亮度必须恢复到以前的值。但此值仅在阻塞设备后影响,不会立即作为最大值的设置。我怎样才能立即影响价值 对我的英语很抱歉 更新 protected void onHandleIntent(Intent intent) { float brightnessFloat = 1.0f; getOldBrightness(); setUpNew
protected void onHandleIntent(Intent intent) {
float brightnessFloat = 1.0f;
getOldBrightness();
setUpNewBrightness(brightnessFloat);
try {
Thread.sleep(1500);
} catch (InterruptedException e) {
System.out.println(e.toString());
}
returnOldBrightness();
}
private void getOldBrightness() {
try {
oldBrightness = Settings.System.getInt(getContentResolver(), android.provider.Settings.System.SCREEN_BRIGHTNESS);
} catch (Settings.SettingNotFoundException e) {
Log.e(LOG_TAG, e.toString());
}
}
private void setUpNewBrightness(float brightness) {
int brightnessInt = (int) brightness * 255;
Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE, Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, brightnessInt);
Log.i(LOG_TAG, "Old brightness: " + oldBrightness + " ===== New brightness: " + brightnessInt);
startInvisibleActivity(brightness, false);
}
private void returnOldBrightness() {
Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE, Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, oldBrightness);
float brightness = (float) oldBrightness / 255;
Log.i(LOG_TAG, "New brightness: " + brightness);
startInvisibleActivity(brightness, true);
}
private void startInvisibleActivity(float brightness, boolean screenUnlocked) {
Intent invisibleActivityIntent = new Intent(getBaseContext(), InvisibleActivity.class);
invisibleActivityIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
invisibleActivityIntent.putExtra(BRIGHTNESS_VALUE, brightness);
invisibleActivityIntent.putExtra(SCREEN_UNLOCKED, screenUnlocked);
startActivity(invisibleActivityIntent);
}
您是说您的代码会立即使显示器显示其最大亮度,但当您尝试将其返回到以前的值时,会延迟吗?您如何等待返回亮度?您可以发布您的代码吗?在“活动”中,WindowManager.LayoutParams更改了屏幕亮度,然后在稍有延迟后完成活动。更糟糕的是,如果在屏幕解锁和启用时启动,该代码工作正常。