ModActionBar.java

/*
 * Copyright (C) 2014 75py
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.nagopy.android.xposed.utilities;

import android.content.Context;
import android.os.Build;
import android.view.View;
import android.view.ViewGroup.MarginLayoutParams;

import com.nagopy.android.xposed.utilities.XposedModules.InitZygote;
import com.nagopy.android.xposed.utilities.XposedModules.XMinSdkVersion;
import com.nagopy.android.xposed.utilities.XposedModules.XposedModule;
import com.nagopy.android.xposed.utilities.setting.ModActionBarSettingsGen;

import de.robv.android.xposed.IXposedHookZygoteInit.StartupParam;
import de.robv.android.xposed.XC_MethodHook;
import de.robv.android.xposed.XposedHelpers;

/**
 * アクションバーを下に移動するモジュール.
 */
@XposedModule(setting = ModActionBarSettingsGen.class)
@XMinSdkVersion(Build.VERSION_CODES.KITKAT)
public class ModActionBar {

    @InitZygote
    public static void initZygote(StartupParam startupParam,
            final ModActionBarSettingsGen mSettings) throws Throwable {
        if (!mSettings.actionBarBottomEnable) {
            return;
        }

        // for KitKat
        // アクションバーを下に表示
        Class<?> clsActionBarOverlayLayout = XposedHelpers.findClass(
                "com.android.internal.widget.ActionBarOverlayLayout", null);
        XposedHelpers.findAndHookMethod(clsActionBarOverlayLayout, "onLayout", boolean.class,
                int.class, int.class, int.class, int.class,
                new XC_MethodHook() {
                    @Override
                    protected void afterHookedMethod(MethodHookParam param) throws Throwable {
                        Context context = (Context) XposedHelpers.callMethod(param.thisObject,
                                "getContext");
                        String packageName = context.getPackageName();

                        if (!mSettings.actionBarBottomPackages.contains(packageName)) {
                            // 対象に含まれない場合、何もしない
                            return;
                        }

                        // ActionBarのViewを取得
                        int action_bar_container = context.getResources().getIdentifier(
                                "action_bar_container", "id", "android");
                        View actionBar = (View) XposedHelpers.callMethod(param.thisObject,
                                "findViewById", action_bar_container);
                        // アクションバーの高さをとっておく
                        final int actionBarHeight = actionBar.getMeasuredHeight();

                        // 下のアクションバーを取っとく
                        int split_action_bar = context.getResources().getIdentifier(
                                "split_action_bar", "id", "android");

                        // パラメータの値を取得
                        int left = (Integer) param.args[1];
                        int top = (Integer) param.args[2];
                        int right = (Integer) param.args[3];
                        int bottom = (Integer) param.args[4];

                        final int parentLeft = (Integer) XposedHelpers.callMethod(
                                param.thisObject,
                                "getPaddingLeft");
                        @SuppressWarnings("unused")
                        final int parentRight = right - left
                                - (Integer) XposedHelpers.callMethod(param.thisObject,
                                        "getPaddingRight");

                        final int parentTop = (Integer) XposedHelpers.callMethod(
                                param.thisObject,
                                "getPaddingTop");
                        final int parentBottom = bottom - top
                                - (Integer) XposedHelpers.callMethod(param.thisObject,
                                        "getPaddingBottom");

                        int count = (Integer) XposedHelpers.callMethod(param.thisObject,
                                "getChildCount");
                        for (int i = 0; i < count; i++) {
                            final View child = (View) XposedHelpers.callMethod(
                                    param.thisObject,
                                    "getChildAt", i);
                            if (child.getVisibility() != View.GONE) {
                                final MarginLayoutParams marginLayoutParams = (MarginLayoutParams) child
                                        .getLayoutParams();

                                final int w = child.getMeasuredWidth();
                                final int h = child.getMeasuredHeight();

                                int childLeft = parentLeft + marginLayoutParams.leftMargin;
                                int childTop;
                                if (child.getId() == split_action_bar) {
                                    // もともと下のアクションバーの場合
                                    childTop = parentBottom - h
                                            - marginLayoutParams.bottomMargin;
                                    childTop -= actionBarHeight;
                                } else if (child.getId() == action_bar_container) {
                                    // アクションバーの場合
                                    childTop = parentBottom - h
                                            - marginLayoutParams.bottomMargin;
                                } else if (child.getId() == android.R.id.content) {
                                    // メインのViewの場合
                                    childTop = parentTop + marginLayoutParams.topMargin
                                            - actionBarHeight;
                                } else {
                                    // それ以外
                                    childTop = parentTop + marginLayoutParams.topMargin;
                                }

                                child.layout(childLeft, childTop, childLeft + w, childTop
                                        + h);
                            }
                        }
                    }
                });
    }

}