http://repo.xposed.info/module/pl.com.android.translucent.recent

AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="pl.com.android.translucent.recent"
    android:versionCode="4"
    android:versionName="0.2.2" >

    <uses-sdk
        android:minSdkVersion="19"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <meta-data
            android:name="xposedmodule"
            android:value="true" />
        <meta-data
            android:name="xposeddescription"
            android:value="Allways show translucent decor on recents panel" />
        <meta-data
            android:name="xposedminversion"
            android:value="54" />
    </application>

</manifest>

MainXposed.java

package pl.com.android.translucent.recent;

import static de.robv.android.xposed.XposedBridge.log;
import static de.robv.android.xposed.XposedHelpers.findAndHookMethod;
import static de.robv.android.xposed.XposedHelpers.getIntField;
import static de.robv.android.xposed.XposedHelpers.getStaticIntField;

import java.lang.reflect.Method;

import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;
import de.robv.android.xposed.IXposedHookLoadPackage;
import de.robv.android.xposed.XC_MethodHook;
import de.robv.android.xposed.XposedBridge;
import de.robv.android.xposed.callbacks.XC_LoadPackage.LoadPackageParam;

public class MainXposed implements IXposedHookLoadPackage {
	public static final String PACKAGE_SYSTEM_UI = "com.android.systemui";
	private static final String CLASS_RECENTS_ACTIVITY = "com.android.systemui.recent.RecentsActivity";
	private static final String FIELD_PRIVATE_FLAG_INHERIT_TRANSLUCENT_DECOR = "PRIVATE_FLAG_INHERIT_TRANSLUCENT_DECOR";
	private static int sPrivateFlagInheritTranslucentDecor;
	private static Method mMethodSetPrivateFlags;

	@Override
	public void handleLoadPackage(LoadPackageParam lpparam) throws Throwable {
		if (!PACKAGE_SYSTEM_UI.equals(lpparam.packageName))
			return;
		try {
			sPrivateFlagInheritTranslucentDecor = getStaticIntField(
					WindowManager.LayoutParams.class,
					FIELD_PRIVATE_FLAG_INHERIT_TRANSLUCENT_DECOR);
			log("sPrivateFlagInheritTranslucentDecor: "
					+ sPrivateFlagInheritTranslucentDecor);

			mMethodSetPrivateFlags = Window.class.getDeclaredMethod(
					"setPrivateFlags", int.class, int.class);
			mMethodSetPrivateFlags.setAccessible(true);

		} catch (Throwable t) {
			XposedBridge.log(t);
			return;
		}

		findAndHookMethod(CLASS_RECENTS_ACTIVITY, lpparam.classLoader,
				"onCreate", Bundle.class, new XC_MethodHook() {
					@Override
					protected void afterHookedMethod(MethodHookParam param)
							throws Throwable {

						Activity activity = (Activity) param.thisObject;
						Window window = activity.getWindow();
						dumpFlags(window);

						int flag = WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
						flag |= WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION;
						flag |= WindowManager.LayoutParams.FLAG_LAYOUT_IN_OVERSCAN;
						window.addFlags(flag);

						clearPrivateFlags(window,
								sPrivateFlagInheritTranslucentDecor);

						dumpFlags(window);
					}
				});
	}

	private static void dumpFlags(Window window) {
		LayoutParams attr = window.getAttributes();
		log("privateFlags: "
				+ Integer.toHexString(getIntField(attr, "privateFlags")));
		log("flags: " + Integer.toHexString(getIntField(attr, "flags")));

	}

	private static void clearPrivateFlags(Window window, int flags) {
		try {
			mMethodSetPrivateFlags.invoke(window, 0, flags);
		} catch (Throwable t) {
			log(t);
		}
	}
}

strings.xml

<resources>

    <string name="app_name">[KK] Translucent Recent</string>

</resources>

xposed_init

pl.com.android.translucent.recent.MainXposed