答案 0 :(得分:8)
只需进行透明的全屏活动即可让触摸通过。要进行触摸,请在设置contentView之前使用以下Window标志:
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
Window window = getWindow();
// Let touches go through to apps/activities underneath.
window.addFlags(FLAG_NOT_TOUCHABLE);
// Now set up content view
setContentView(R.layout.main);
}
对于main.xml布局文件,只需使用带有透明背景的全屏LinearLayout:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/background"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#33000000">
</LinearLayout>
然后调整“亮度”只需在代码中改变背景颜色的值:
findViewById(R.id.background).setBackgroundColor(0x66000000);
答案 1 :(得分:4)
获取WindowManager的实例。
WindowManager windowManager = (WindowManager) Class.forName("android.view.WindowManagerImpl").getMethod("getDefault", new Class[0]).invoke(null, new Object[0]);
创建全屏布局xml(布局参数设置为fill_parent
)
将您的视图设置为无法点击,无法对焦,无法长时间点击等,以便将触摸传递到您的应用,并且应用可以检测到它。
view.setFocusable(false);
view.setClickable(false);
view.setKeepScreenOn(false);
view.setLongClickable(false);
view.setFocusableInTouchMode(false);
创建类型为android.view.WindowManager.LayoutParams
的布局参数。
LayoutParams layoutParams = new LayoutParams();
设置高度,宽度等布局参数
layoutParams.height = LayoutParams.FILL_PARENT;
layoutParams.width = LayoutParams.FILL_PARENT;
layoutParams.flags = 280; // You can try LayoutParams.FLAG_FULLSCREEN too
layoutParams.format = PixelFormat.TRANSLUCENT; // You can try different formats
layoutParams.windowAnimations = android.R.style.Animation_Toast; // You can use only animations that the system to can access
layoutParams.type = LayoutParams.TYPE_SYSTEM_OVERLAY;
layoutParams.gravity = Gravity.BOTTOM;
layoutParams.x = 0;
layoutParams.y = 0;
layoutParams.verticalWeight = 1.0F;
layoutParams.horizontalWeight = 1.0F;
layoutParams.verticalMargin = 0.0F;
layoutParams.horizontalMargin = 0.0F;
关键步骤:您可以设置所需亮度的百分比。
layoutParams.setBackgroundDrawable(getBackgroundDrawable(i));
private Drawable getBackgroundDrawable(int i) {
int j = 255 - (int) Math.round(255D * Math.exp(4D * ((double) i / 100D) - 4D));
return new ColorDrawable(Color.argb(j, 0, 0, 0));}
最后将视图添加到您之前创建的windowManager中。
windowManager.addView(view, layoutParams);
注意:您需要SYSTEM_ALERT_WINDOW
权限才能在屏幕上放置叠加层。
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
测试了这个并且它有效。如果你遇到困难,请告诉我。
答案 2 :(得分:1)
当然你不能使用这是生产代码,但是如果你正在玩...试试这个Undocumented hack
它使用:
private void setBrightness(int brightness) {
try {
IHardwareService hardware = IHardwareService.Stub.asInterface(
ServiceManager.getService("hardware"));
if (hardware != null) {
hardware.setScreenBacklight(brightness);
}
} catch (RemoteException doe) {
}
}
请记住它使用此权限:
<uses-permission android:name="android.permission.HARDWARE_TEST"/>
答案 3 :(得分:0)
你也可以试试这个:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.max_bright);
WindowManager.LayoutParams lp = getWindow().getAttributes();
lp.screenBrightness = 100 / 100.0f;
getWindow().setAttributes(lp);
}