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Android代码混淆前后分析

为了方便站在巨人臂膀上研读源码，特地将自己写的源码进行混淆之后与源码进行比较。

使用混淆的方法在project.properties文件上加入

proguard.config=proguard.cfg

这一条代码。关于如何反编译源码，请看之前的一篇博客如何反编绎APK文件。

一、代码结构

1、源码

2、未带混淆机制代码

3、混淆后的代码

从图中可以看出未带混淆机制的代码基本上与源码的结构相同，同时加入了R文件和android.annotation包。而混淆之后的代码删除了TestCommon文件，因为没有任何其他的文件使用到了这个文件当中的方法，因此使用混淆机制后其被删除。

二、MyTabHost代码分析

1、MyTabHost源码

package com.yang.confusion;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.TabHost;

public class MyTabHost extends TabHost {

	public MyTabHost(Context context) {
		super(context);
	}

	public MyTabHost(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	public TabSpec setIndicator(CharSequence label) {
		return null;
	}
	private String str = null;
	private static final int FLAG = 1;

	//测试if
	public void testIf() {
		if (str == null) {
			System.out.println("空");
		}
	}

	/**
	 * 测试IfElse
	 */
	public void testIfElse() {
		if (str == null) {
			System.out.println("空");
		} else {
			System.out.println("不空");
		}
	}

	public void testIfWhile() {
		if (str == null) {
			while (str == null) {
				System.out.println("空");
			}
		}
	}

	public void testIfDoWhile() {
		if (str == null) {
			do {
				System.out.println("空");
			} while (str == null);
		}
	}

	public void testFor() {
		for (int i = 0; i < 10; i++) {
			System.out.println("asdf");
		}
	}

	public void testForIf() {
		for (int i = 0; i < 10; i++) {
			if (i == 1) {
				System.out.println("asdf");
			}
		}
	}

	public void testWhile() {
		while (str == null) {
			System.out.println("空");
		}
	}

	@SuppressWarnings("unused")
	private void testSwitch(int key) {
		switch (key) {
		case FLAG:

			break;

		default:
			break;
		}
	}


}TestActivity

2、未带混淆机制MyTabHost代码

package com.yang.confusion;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.TabHost;
import android.widget.TabHost.TabSpec;
import java.io.PrintStream;

public class MyTabHost extends TabHost
{
  private static final int FLAG = 1;
  private String str = null;

  public MyTabHost(Context paramContext)
  {
    super(paramContext);
  }

  public MyTabHost(Context paramContext, AttributeSet paramAttributeSet)
  {
    super(paramContext, paramAttributeSet);
  }

  private void testSwitch(int paramInt)
  {
    switch (paramInt)
    {
    case 1:
    }
  }

  public TabHost.TabSpec setIndicator(CharSequence paramCharSequence)
  {
    return null;
  }

  public void testFor()
  {
    for (int i = 0; ; i++)
    {
      if (i >= 10)
        return;
      System.out.println("asdf");
    }
  }

  public void testForIf()
  {
    for (int i = 0; ; i++)
    {
      if (i >= 10)
        return;
      if (i != 1)
        continue;
      System.out.println("asdf");
    }
  }

  public void testIf()
  {
    if (this.str == null)
      System.out.println("空");
  }

  public void testIfDoWhile()
  {
    if (this.str == null)
      do
        System.out.println("空");
      while (this.str == null);
  }

  public void testIfElse()
  {
    if (this.str == null)
      System.out.println("空");
    while (true)
    {
      return;
      System.out.println("不空");
    }
  }

  public void testIfWhile()
  {
    if (this.str == null);
    while (true)
    {
      if (this.str != null)
        return;
      System.out.println("空");
    }
  }

  public void testWhile()
  {
    while (true)
    {
      if (this.str != null)
        return;
      System.out.println("空");
    }
  }
}

3、混淆后的MyTabHost代码

package com.yang.confusion;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.TabHost;

public class MyTabHost extends TabHost
{
  private String a = null;

  public MyTabHost(Context paramContext, AttributeSet paramAttributeSet)
  {
    super(paramContext, paramAttributeSet);
  }
}

从中可以看出，只要源码没有进行混淆设置，还是可以读懂的。没有混淆机制的代码，对源码进行相应的改动，具体改动的目的不知道，但是还是可以看懂的。而对于混淆后的代码，对源代码进行了进一步的缩减，对源码当中没有使用到的方法全部删除。

三、TestActivity代码分析

1、TestActivity源码

package com.yang.confusion;

import android.app.Activity;
import android.os.Bundle;

public class TestActivity extends Activity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		testIf();
		testIfElse();
		testIfWhile();
		testIfDoWhile();
		testFor();
		testForIf();
		testWhile();
		testSwitch(2);
	}
	private String str = null;
	private static final int FLAG = 1;

	//测试if
	public void testIf() {
		if (str == null) {
			System.out.println("空");
		}
	}

	/**
	 * 测试IfElse
	 */
	public void testIfElse() {
		if (str == null) {
			System.out.println("空");
		} else {
			System.out.println("不空");
		}
	}

	public void testIfWhile() {
		if (str == null) {
			while (str == null) {
				System.out.println("空");
			}
		}
	}

	public void testIfDoWhile() {
		if (str == null) {
			do {
				System.out.println("空");
			} while (str == null);
		}
	}

	public void testFor() {
		for (int i = 0; i < 10; i++) {
			System.out.println("asdf");
		}
	}

	public void testForIf() {
		for (int i = 0; i < 10; i++) {
			if (i == 1) {
				System.out.println("asdf");
			}
		}
	}

	public void testWhile() {
		while (str == null) {
			System.out.println("空");
		}
	}

	private void testSwitch(int key) {
		switch (key) {
		case FLAG:

			break;

		default:
			break;
		}
	}

}

2、未带混淆机制的TestActivity代码

package com.yang.confusion;

import android.app.Activity;
import android.os.Bundle;
import java.io.PrintStream;

public class TestActivity extends Activity
{
  private static final int FLAG = 1;
  private String str = null;

  private void testSwitch(int paramInt)
  {
    switch (paramInt)
    {
    case 1:
    }
  }

  protected void onCreate(Bundle paramBundle)
  {
    super.onCreate(paramBundle);
    testIf();
    testIfElse();
    testIfWhile();
    testIfDoWhile();
    testFor();
    testForIf();
    testWhile();
    testSwitch(2);
  }

  public void testFor()
  {
    for (int i = 0; ; i++)
    {
      if (i >= 10)
        return;
      System.out.println("asdf");
    }
  }

  public void testForIf()
  {
    for (int i = 0; ; i++)
    {
      if (i >= 10)
        return;
      if (i != 1)
        continue;
      System.out.println("asdf");
    }
  }

  public void testIf()
  {
    if (this.str == null)
      System.out.println("空");
  }

  public void testIfDoWhile()
  {
    if (this.str == null)
      do
        System.out.println("空");
      while (this.str == null);
  }

  public void testIfElse()
  {
    if (this.str == null)
      System.out.println("空");
    while (true)
    {
      return;
      System.out.println("不空");
    }
  }

  public void testIfWhile()
  {
    if (this.str == null);
    while (true)
    {
      if (this.str != null)
        return;
      System.out.println("空");
    }
  }

  public void testWhile()
  {
    while (true)
    {
      if (this.str != null)
        return;
      System.out.println("空");
    }
  }
}

3、混淆后的TestActivity代码

package com.yang.confusion;

import android.app.Activity;
import android.os.Bundle;
import java.io.PrintStream;

public class TestActivity extends Activity
{
  private String a = null;

  protected void onCreate(Bundle paramBundle)
  {
    int i = 0;
    super.onCreate(paramBundle);
    if (this.a == null)
      System.out.println("空");
    label44: int j;
    if (this.a == null)
    {
      System.out.println("空");
      if (this.a == null)
        if (this.a == null)
          break label106;
      if (this.a == null)
        do
          System.out.println("空");
        while (this.a == null);
      j = 0;
      label75: if (j < 10)
        break label117;
      label81: if (i < 10)
        break label131;
    }
    while (true)
    {
      if (this.a != null)
      {
        return;
        System.out.println("不空");
        break;
        label106: System.out.println("空");
        break label44;
        label117: System.out.println("asdf");
        j++;
        break label75;
        label131: if (i == 1)
          System.out.println("asdf");
        i++;
        break label81;
      }
      System.out.println("空");
    }
  }
}

四、MainTabHostActivity代码分析

1、MainTabHostActivity源码

package com.yang.tabhost;
import android.app.TabActivity;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TabHost;
import android.widget.TabWidget;
import android.widget.TextView;
/**
 * 
 * @Title: MainTabHostActivity.java
 * @Package com.yang.tabhost
 * @Description: MainTabHostActivity
 * @author Yang   
 * @date 2012-8-13 下午4:35:30
 * @version V1.0
 */
public class MainTabHostActivity extends TabActivity {
	private TabHost tabHost;
	private TabWidget tabWidget;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		// No Title bar
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		requestWindowFeature(Window.FEATURE_PROGRESS);
		setContentView(R.layout.main_layout);
		makeTab();
	}
	
	private void makeTab() {
		if (this.tabHost == null) {
			tabHost = getTabHost();
			tabWidget = getTabWidget();
			tabHost.setup();
			tabHost.bringToFront();
			
			setupChild1();
			setupChild2();
		}
		
		for (int i = 0; i < tabWidget.getChildCount(); i++) {
			TextView tv = (TextView) tabWidget.getChildAt(i).findViewById(
					android.R.id.title);
			android.widget.RelativeLayout.LayoutParams tvp = new android.widget.RelativeLayout.LayoutParams(
					RelativeLayout.LayoutParams.WRAP_CONTENT,
					RelativeLayout.LayoutParams.WRAP_CONTENT);
			tvp.addRule(RelativeLayout.ALIGN_PARENT_TOP);
			tvp.addRule(RelativeLayout.CENTER_HORIZONTAL);
			tv.setLayoutParams(tvp);
			
			ImageView iv = (ImageView) tabWidget.getChildAt(i).findViewById(
					android.R.id.icon);
			android.widget.RelativeLayout.LayoutParams ivp = new android.widget.RelativeLayout.LayoutParams(
					RelativeLayout.LayoutParams.WRAP_CONTENT,
					RelativeLayout.LayoutParams.WRAP_CONTENT);
			ivp.addRule(RelativeLayout.CENTER_HORIZONTAL);
			ivp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
			iv.setLayoutParams(ivp);
			
			// 得到每个tab
			View vvv = tabWidget.getChildAt(i);
			// 设置背景色为透明
			vvv.setBackgroundColor(Color.TRANSPARENT);
			// 设置字体颜色和大小
			tv.setTextColor(this.getResources()
					.getColorStateList(R.color.white));
			tv.setTextSize(15);

		}
	}

	private void setupChild2() {
		Intent intent = new Intent();
		intent.setAction(Intent.ACTION_MAIN);
		intent.setClass(this, AnotherChildActivity.class);
		String name = (String) this.getResources().getText(R.string.allimage);
		tabHost.addTab(tabHost
				.newTabSpec(name)
				.setIndicator(name,
						getResources().getDrawable(R.drawable.tab_selected))
				.setContent(intent));
	}

	private void setupChild1() {
		Intent intent = new Intent();
		intent.setAction(Intent.ACTION_MAIN);
		intent.setClass(this, ChildTabHostActivity.class);
		String name = (String) this.getResources().getText(R.string.onepiece);
		tabHost.addTab(tabHost
				.newTabSpec(name)
				.setIndicator(name,
						getResources().getDrawable(R.drawable.tab_selected))
				.setContent(intent));
	}
}

2、未带混淆机制的MainTabHostActivity代码

package com.yang.tabhost;

import android.app.TabActivity;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout.LayoutParams;
import android.widget.TabHost;
import android.widget.TabHost.TabSpec;
import android.widget.TabWidget;
import android.widget.TextView;

public class MainTabHostActivity extends TabActivity
{
  private TabHost tabHost;
  private TabWidget tabWidget;

  private void makeTab()
  {
    if (this.tabHost == null)
    {
      this.tabHost = getTabHost();
      this.tabWidget = getTabWidget();
      this.tabHost.setup();
      this.tabHost.bringToFront();
      setupChild1();
      setupChild2();
    }
    for (int i = 0; ; i++)
    {
      if (i >= this.tabWidget.getChildCount())
        return;
      TextView localTextView = (TextView)this.tabWidget.getChildAt(i).findViewById(16908310);
      RelativeLayout.LayoutParams localLayoutParams1 = new RelativeLayout.LayoutParams(-2, -2);
      localLayoutParams1.addRule(10);
      localLayoutParams1.addRule(14);
      localTextView.setLayoutParams(localLayoutParams1);
      ImageView localImageView = (ImageView)this.tabWidget.getChildAt(i).findViewById(16908294);
      RelativeLayout.LayoutParams localLayoutParams2 = new RelativeLayout.LayoutParams(-2, -2);
      localLayoutParams2.addRule(14);
      localLayoutParams2.addRule(12);
      localImageView.setLayoutParams(localLayoutParams2);
      this.tabWidget.getChildAt(i).setBackgroundColor(0);
      localTextView.setTextColor(getResources().getColorStateList(2130968578));
      localTextView.setTextSize(15.0F);
    }
  }

  private void setupChild1()
  {
    Intent localIntent = new Intent();
    localIntent.setAction("android.intent.action.MAIN");
    localIntent.setClass(this, ChildTabHostActivity.class);
    String str = (String)getResources().getText(2131034113);
    this.tabHost.addTab(this.tabHost.newTabSpec(str).setIndicator(str, getResources().getDrawable(2130837512)).setContent(localIntent));
  }

  private void setupChild2()
  {
    Intent localIntent = new Intent();
    localIntent.setAction("android.intent.action.MAIN");
    localIntent.setClass(this, AnotherChildActivity.class);
    String str = (String)getResources().getText(2131034114);
    this.tabHost.addTab(this.tabHost.newTabSpec(str).setIndicator(str, getResources().getDrawable(2130837512)).setContent(localIntent));
  }

  protected void onCreate(Bundle paramBundle)
  {
    super.onCreate(paramBundle);
    requestWindowFeature(1);
    requestWindowFeature(2);
    setContentView(2130903041);
    makeTab();
  }
}

3、混淆后的MainTabHostActivity代码

package com.yang.tabhost;

import android.app.TabActivity;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.RelativeLayout.LayoutParams;
import android.widget.TabHost;
import android.widget.TabHost.TabSpec;
import android.widget.TabWidget;
import android.widget.TextView;

public class MainTabHostActivity extends TabActivity
{
  private TabHost a;
  private TabWidget b;

  protected void onCreate(Bundle paramBundle)
  {
    super.onCreate(paramBundle);
    requestWindowFeature(1);
    requestWindowFeature(2);
    setContentView(2130903041);
    if (this.a == null)
    {
      this.a = getTabHost();
      this.b = getTabWidget();
      this.a.setup();
      this.a.bringToFront();
      Intent localIntent1 = new Intent();
      localIntent1.setAction("android.intent.action.MAIN");
      localIntent1.setClass(this, ChildTabHostActivity.class);
      String str1 = (String)getResources().getText(2131034113);
      this.a.addTab(this.a.newTabSpec(str1).setIndicator(str1, getResources().getDrawable(2130837512)).setContent(localIntent1));
      Intent localIntent2 = new Intent();
      localIntent2.setAction("android.intent.action.MAIN");
      localIntent2.setClass(this, AnotherChildActivity.class);
      String str2 = (String)getResources().getText(2131034114);
      this.a.addTab(this.a.newTabSpec(str2).setIndicator(str2, getResources().getDrawable(2130837512)).setContent(localIntent2));
    }
    for (int i = 0; ; i++)
    {
      if (i >= this.b.getChildCount())
        return;
      TextView localTextView = (TextView)this.b.getChildAt(i).findViewById(16908310);
      RelativeLayout.LayoutParams localLayoutParams1 = new RelativeLayout.LayoutParams(-2, -2);
      localLayoutParams1.addRule(10);
      localLayoutParams1.addRule(14);
      localTextView.setLayoutParams(localLayoutParams1);
      ImageView localImageView = (ImageView)this.b.getChildAt(i).findViewById(16908294);
      RelativeLayout.LayoutParams localLayoutParams2 = new RelativeLayout.LayoutParams(-2, -2);
      localLayoutParams2.addRule(14);
      localLayoutParams2.addRule(12);
      localImageView.setLayoutParams(localLayoutParams2);
      this.b.getChildAt(i).setBackgroundColor(0);
      localTextView.setTextColor(getResources().getColorStateList(2130968578));
      localTextView.setTextSize(15.0F);
    }
  }
}

从中可以看出，混淆后的代码难以阅读，但是可以从中找到规律，至于什么规律，博主能力有限，看大家去找了……

源码下载

编译后代码下载

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数据结构之二叉树创建及遍历 | hdu 4323 Magic Number

2012-08-13 21:24
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最新评论

Android代码混淆前后分析

一、代码结构

1、源码

2、未带混淆机制代码

3、混淆后的代码

二、MyTabHost代码分析

1、MyTabHost源码

2、未带混淆机制MyTabHost代码

3、混淆后的MyTabHost代码

三、TestActivity代码分析

1、TestActivity源码

2、未带混淆机制的TestActivity代码

3、混淆后的TestActivity代码

四、MainTabHostActivity代码分析

1、MainTabHostActivity源码

2、未带混淆机制的MainTabHostActivity代码

源码下载

编译后代码下载

评论

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最近访客 更多访客>>

博主相关

文章分类

社区版块

存档分类

最新评论

Android代码混淆前后分析

一、代码结构

1、源码

2、未带混淆机制代码

3、混淆后的代码

二、MyTabHost代码分析

1、MyTabHost源码

2、未带混淆机制MyTabHost代码

3、混淆后的MyTabHost代码

三、TestActivity代码分析

1、TestActivity源码

2、未带混淆机制的TestActivity代码

3、混淆后的TestActivity代码

四、MainTabHostActivity代码分析

1、MainTabHostActivity源码

2、未带混淆机制的MainTabHostActivity代码

源码下载

编译后代码下载

评论

发表评论

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