在Android中以编程方式更改屏幕亮度
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03-10-2019 - |
题
我想在Android中以编程方式更改屏幕亮度。目前,我使用此代码:
WindowManager.LayoutParams lp = getWindow().getAttributes();
float brightness=1.0f;
lp.screenBrightness = brightness;
getWindow().setAttributes(lp);
但是该示例代码在纸杯蛋糕上起作用,而不是最新版本。我使用的是最新版本的SDK ..新的Android版本的首选解决方案是什么?
解决方案
如何为此使用ihardwareservice接口?可以找到一个例子 教程.
更新:教程链接仍然有效,但是下一个答案也可以使用实际代码。
其他提示
这是可以通过使用以下方法来做到的:
WindowManager.LayoutParams layout = getWindow().getAttributes();
layout.screenBrightness = 1F;
getWindow().setAttributes(layout);
也可以看看:http://developer.android.com/reference/android/view/windowmanager.layoutparams.html#screenbrightness
您必须将参数添加到 Window
在创建之前,否则会投掷 java.lang.IllegalArgumentException: Window type can not be changed after the window is added.
参见示例 android.app.Dialog.Dialog
.
final Dialog dialog = new Dialog(this) {
@Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
WindowManager.LayoutParams layout = getWindow()
.getAttributes();
layout.screenBrightness = 1F;
getWindow().setAttributes(layout);
}
};
dialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
dialog.show();
请注意,亮度值在0.0F和1.0F之间。
@kamal_tech_view:您必须转换值 layout.screenbrightness = value; 浮动
final Dialog dialog = new Dialog(act);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog
.setContentView(R.layout.menubase_brightness_control);
dialog.setCanceledOnTouchOutside(true);
SeekBar global_brightness_control = (SeekBar) dialog
.findViewById(R.id.global_brightness_control);
global_brightness_control.setMax(255);
global_brightness_control.setProgress(Settings.System.getInt(
con.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS));
global_brightness_control
.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
public void onProgressChanged(SeekBar seekBar,
int progress, boolean fromUser) {
Settings.System
.putInt(con.getContentResolver(),
Settings.System.SCREEN_BRIGHTNESS, progress);
}
});
dialog.show();
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