LayoutInflaterWrapper.java

/*
 * Copyright (C) 2015 HouKx <hkx.aidream@gmail.com>
 *
 * 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 androidx.pluginmgr;

import org.xmlpull.v1.XmlPullParser;

import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.LinearLayout;

/**
 * LayoutInflater 包装器，用来替换某些系统布局
 * <p>
 * 
 * @author HouKangxi
 * 
 */
class LayoutInflaterWrapper extends LayoutInflater {
    private static final String tag = "LayoutInflaterWrapper";
    private LayoutInflater target;
    private final Class<?> layoutClass;
    private final Class<?> idClass;
    @SuppressWarnings("unused")
    private final Class<?> attrClass;
    private final int screen_title;

    public LayoutInflaterWrapper(LayoutInflater target) {
        super(target.getContext());
        this.target = target;
        Class<?> layoutClass = null;
        Class<?> idClass = null;
        Class<?> attrClass = null;
        int screen_title = 0;
        try {
            layoutClass = Class.forName("com.android.internal.R$layout");
            idClass = Class.forName("com.android.internal.R$id");
            attrClass = Class.forName("com.android.internal.R$attr");
            screen_title = layoutClass.getField("screen_title").getInt(null);
        } catch (Exception e) {
            e.printStackTrace();
        }
        this.layoutClass = layoutClass;
        this.idClass = idClass;
        this.attrClass = attrClass;
        this.screen_title = screen_title;
    }

    @Override
    public LayoutInflater cloneInContext(Context newContext) {
        return target.cloneInContext(newContext);
    }

    @Override
    public Context getContext() {
        return target.getContext();
    }

    @Override
    public void setFactory(Factory factory) {
        target.setFactory(factory);
    }

    // public void setFactory2(Factory2 factory) {
    // target.setFactory2(factory);
    // }

    @Override
    public Filter getFilter() {
        return target.getFilter();
    }

    @Override
    public void setFilter(Filter filter) {
        target.setFilter(filter);
    }

    @Override
    public View inflate(int resource, ViewGroup root) {
        Log.i(tag, "inflate布局( resource=" + resource + ", root=" + root + " )");
        if (resource == screen_title) {
            Log.i(tag, "使用自定义布局");
            return createLayout_screen_simple(resource, root);
        }
        return target.inflate(resource, root);
    }

    /*
     * private View createLayout_screen_title(int resource, ViewGroup root) {
     * try { int layoutId = Class .forName(getContext().getPackageName() +
     * ".R$layout") .getField("screen_title").getInt(null); Context
     * frameworkContext = PluginContainer.getInstance() .getContext();
     * XmlResourceParser parser = frameworkContext.getResources()
     * .getLayout(layoutId); ViewGroup view = (ViewGroup) target.inflate(parser,
     * root); showViews(view, 0, "根结点视图"); android.widget.ViewStub stub =
     * (android.widget.ViewStub) view .getChildAt(0); Field field =
     * idClass.getField("action_mode_bar_stub"); int viewStubId =
     * field.getInt(null); stub.setId(viewStubId); return view; } catch
     * (Exception e) { e.printStackTrace(); } return target.inflate(resource,
     * root); }
     * 
     * private void showViews(View view, int n, String r) { StringBuilder sb =
     * new StringBuilder(r); while (n-- > 0) { sb.append('='); } sb.append(' ');
     * String msg = sb.toString() + view; Log.i(tag, msg); if (view instanceof
     * ViewGroup) { ViewGroup g = (ViewGroup) view; for (int i = 0, len =
     * g.getChildCount(); i < len; i++) { View c = g.getChildAt(i); showViews(c,
     * n + 1, view.toString()); } } }
     */
    private View createLayout_screen_simple(int resource, ViewGroup root) {
        LinearLayout lyt = new LinearLayout(getContext());
        lyt.setOrientation(LinearLayout.VERTICAL);
        if (android.os.Build.VERSION.SDK_INT >= 14) {
            try {
                LinearLayout.class.getMethod("setFitsSystemWindows",
                        boolean.class).invoke(lyt, true);
            } catch (Throwable e) {
            }
        }
        int viewStubId = 0;
        int frameLytId = 0;
        int layoutResource = 0;
        int inflatedId = 0;
        try {
            frameLytId = idClass.getField("content").getInt(null);
            viewStubId = idClass.getField("action_mode_bar_stub").getInt(null);
            inflatedId = idClass.getField("action_mode_bar").getInt(null);
            layoutResource = layoutClass.getField("action_mode_bar").getInt(
                    null);
        } catch (Throwable e) {
            e.printStackTrace();
        }
        {
            android.widget.ViewStub viewStub = new android.widget.ViewStub(
                    getContext());
            viewStub.setId(viewStubId);
            if (inflatedId != 0)
                viewStub.setInflatedId(inflatedId);
            if (layoutResource != 0)
                viewStub.setLayoutResource(layoutResource);
            lyt.addView(viewStub, new LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.MATCH_PARENT,
                    LinearLayout.LayoutParams.WRAP_CONTENT));
        }
        FrameLayout flyt_content = new FrameLayout(getContext());
        flyt_content.setId(frameLytId);
        LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT,
                LinearLayout.LayoutParams.MATCH_PARENT);
        // layoutParams.weight = 1;
        flyt_content
                .setForegroundGravity(Gravity.FILL_HORIZONTAL | Gravity.TOP);
        // try {
        // int foreground = attrClass.getField("windowContentOverlay").getInt(
        // null);
        // flyt_content.setForeground(getContext().getResources().getDrawable(
        // foreground));
        // } catch (Throwable e) {
        // e.printStackTrace();
        // }
        lyt.addView(flyt_content, layoutParams);
        return lyt;
    }

    /*
     * private View createLayout_screen_title(int resource, ViewGroup root) {
     * LinearLayout lyt = new LinearLayout(getContext());
     * lyt.setOrientation(LinearLayout.VERTICAL); if
     * (android.os.Build.VERSION.SDK_INT >= 14) { try {
     * LinearLayout.class.getMethod("setFitsSystemWindows",
     * boolean.class).invoke(lyt, true); } catch (Throwable e) { } } int
     * viewStubId = 0; int textViewId = 0; int frameLytId = 0; int
     * layoutResource = 0; int inflatedId = 0; try { textViewId =
     * idClass.getField("title").getInt(null); frameLytId =
     * idClass.getField("content").getInt(null); viewStubId =
     * idClass.getField("action_mode_bar_stub").getInt(null); inflatedId =
     * idClass.getField("action_mode_bar").getInt(null); // layoutResource =
     * layoutClass.getField("action_mode_bar").getInt( // null); } catch
     * (Throwable e) { e.printStackTrace(); } { android.widget.ViewStub viewStub
     * = new android.widget.ViewStub( getContext()); viewStub.setId(viewStubId);
     * viewStub.setInflatedId(inflatedId); if (layoutResource != 0) {
     * viewStub.setLayoutResource(layoutResource); } lyt.addView(viewStub, new
     * LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT,
     * LinearLayout.LayoutParams.WRAP_CONTENT)); } { FrameLayout flyt_top = new
     * FrameLayout(getContext()); int windowTitleSize =
     * LinearLayout.LayoutParams.WRAP_CONTENT; // try { // windowTitleSize =
     * attrClass.getField("windowTitleSize").getInt( // null); // } catch
     * (Throwable e) { // e.printStackTrace(); // } TextView textView = new
     * TextView(getContext()); textView.setId(textViewId);
     * textView.setGravity(Gravity.CENTER_VERTICAL); flyt_top.addView(textView,
     * new FrameLayout.LayoutParams( FrameLayout.LayoutParams.MATCH_PARENT,
     * FrameLayout.LayoutParams.MATCH_PARENT)); lyt.addView(flyt_top, new
     * LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT,
     * windowTitleSize)); }
     * 
     * FrameLayout flyt_content = new FrameLayout(getContext());
     * flyt_content.setId(frameLytId); LinearLayout.LayoutParams layoutParams =
     * new LinearLayout.LayoutParams( LinearLayout.LayoutParams.MATCH_PARENT,
     * 0); layoutParams.weight = 1; flyt_content
     * .setForegroundGravity(Gravity.FILL_HORIZONTAL | Gravity.TOP); // try { //
     * int foreground = attrClass.getField("windowContentOverlay").getInt( //
     * null); //
     * flyt_content.setForeground(getContext().getResources().getDrawable( //
     * foreground)); // } catch (Throwable e) { // e.printStackTrace(); // }
     * lyt.addView(flyt_content, layoutParams); return lyt; }
     */

    @Override
    public View inflate(XmlPullParser parser, ViewGroup root) {
        return target.inflate(parser, root);
    }

    @Override
    public View inflate(int resource, ViewGroup root, boolean attachToRoot) {
        return target.inflate(resource, root, attachToRoot);
    }

    @Override
    public View inflate(XmlPullParser parser, ViewGroup root,
            boolean attachToRoot) {
        return target.inflate(parser, root, attachToRoot);
    }

    @Override
    protected View onCreateView(String name, AttributeSet attrs)
            throws ClassNotFoundException {
        try {
            return (View) LayoutInflater.class.getDeclaredMethod(
                    "onCreateView", String.class, AttributeSet.class).invoke(
                    target, name, attrs);
        } catch (Exception e) {
            e.printStackTrace();
            return super.onCreateView(name, attrs);
        }
    }

    protected View onCreateView(View parent, String name, AttributeSet attrs)
            throws ClassNotFoundException {
        try {
            return (View) LayoutInflater.class.getDeclaredMethod(
                    "onCreateView", View.class, String.class,
                    AttributeSet.class).invoke(target, parent, name, attrs);
        } catch (Exception e) {
            e.printStackTrace();
            return super.onCreateView(name, attrs);
        }
    }

}