Where to learn programming/coding

This list is certainly not definitive but if you are not in the Computer Sciences by way of study or profession then the info below should help you get started...

Codecademy: Learn to code
www.codecademy.com/
Lessons to learn to code interactively.

‎
Learn | Code.org
code.org/learn
Choose from 3 activities designed to give you your first experience programming.

Code Avengers: learn to code games, apps and websites
www.codeavengers.com/
Learn how to code games, apps and websites with fun and effective interactive games. HTML, CSS and JavaScript ...


Hurricane Electric Interactive Programming
http://adf.ly/1dq5vW
Interactive Programming Courses. Perl · PHP · Ruby · Python · SQL. Web Development Courses. HTML · CSS ...
‎
Interactive Python Tutorial
www.learnpython.org/
LearnPython.org is a free interactive Python tutorial for people who want to learn Python, fast.

RubyMonk - Interactive Ruby tutorials
http://adf.ly/1dq65w
Free, interactive tutorials to help you discover Ruby idioms, in your browser!

Code School: Learn by Doing
http://adf.ly/1dq67F
Code School teaches web technologies in the comfort of your browser with video lessons, coding challenges, and ...

List of interactive programming websites - Reddit
http://www.reddit.com/r/learnprogram...ming_websites/

Unpacking, Editing, Packing ROMS GUIDE - Host Zero

First download the tools from the link below.



1. system.img
2. system.new.dat

1.Unpacking Repacking system.img

1. Paste your system.img in tools folder
2. Open cmd.exe
3. Type:

Code:

mkdir <your_folder_name>
ImgExtactor <raw_sparse.img> system -i

ex: ImgExtactor system.img system -i

4. Now open your folder you have created, you can find your <raw_image> has been extracted.
5. Now edit the files in system folder as your convenience.
6. Now open properties of folder you have created see the size of folder.
7. Now lets pack the image back, open the minimized command window.

Code:

make_ext4fs -s -l <size_of_your_folder+100>M -a system <name_of_packing_image>.img <your_folder_name>/

ex: make_ext4fs -s -l 512M -a system my_new_system.img system/

8. Done, enjoy!

2.Unpacking Repacking system.new.dat

1. Paste your system.new.dat, system.transfer.list and file_contexts in tools folder.
2. Open cmd.exe
3. Type:

Code:

sprs2ext system.transfer.list <name_of_system>.new.dat

ex: sprs2ext system.transfer.list system.new.dat

4. Now again type:

Code:

mkdir <your_folder_name>
ImgExtactor <raw_sparse.new.img> system -i

ex: ImgExtactor system.img system -i

5. Now open folder you have created and you will find the system.new.dat has been extracted.
6. Edit the extracted files.
7. Open properties of the extracted folder and check the size of folder
7. Now open minimized command window.

Code:

make_ext4fs -T 0 -S file_contexts -l <size_of_folder+100>M -a system <name_of_packing_image>.img <your_folder_name>/

ex: make_ext4fs -T 0 -S file_contexts -I 512M -a system my_new_system.img system/

8. Now again type:

Code:

rimg2sdat <your_raw_image>.img

ex: rimg2img my_new_system.img

9. Done! enjoy.

CLICK HERE TO DOWNLOAD TOOLS

GUI - SignApk Jar File Tutorial to Sign and Align APKs

Hello guys,
I am here with an easy to use application about creating your own keystore to sign APKs and align them.

Requirements:

• JDK - Download from www.java.com
• sign.jar - Download HERE - APK-Signer 1.8.3 by Hai Bison - working link as of 05/03/2016

Please note that you need to have JDK installed in system for jar files to work.

INITIAL SETUPS

1. Assuming that you have JDK installed, download sign.jar and extract in anywhere you can navigate easy.
2. I have it in "C:/apktool"
3. Open Command Prompt (click Start > type cmd in search box and press enter)
4. Navigate to folder where you extracted jar file, in my case "c:\>cd apktool".
5. Type, "java -jar sign.jar"
6. The writing things ends here and you will see application opened in GUI - as follows

CREATE KEYSTORE

1. Now, we will need to first create a keystore file,
2. Click on "Save As" in Target Tab and name the file anything, i named it "signedOne"
3. Click on Save Button
4. Now We will need to fill the form a little,
5. In Password, type any password you may remember
6. in Alias, type any name, usually that should be similar to your UNSIGNED apk file name
7. Give an Alias Password (for ease, keep it same as password above)
8. In Name field, Type your first and last name,
9. This is the minimum required in form, if you want to fill full form, thats upto you.
10. Click on Button "Generate Keyfile"
11. Wait until message appears, "Keyfile Generated Successfully". Press OK

SIGN APK
Now its time to sign the APK. - Click on "Signer" Tab.

1. First, Click on button "Load Keyfile"
2. Browse for the same keystore file you created, in our case, if you kept the name same as mine, that will be "signedOne.keystore"
3. Type the password you gave while creating the keystore file.
4. You will see alias name appearing automatically below if password was correct.
5. type the alias password you gave earlier.
6. Click on "Load Target File" and browse for the APK file you want to sign. In my case "whatsapp.apk"
7. Click on "Sign" button
8. Wait until the dialog appears, "File Signed"
9. You will see a new file whatsapp_SIGNED_UNALIGNED.apk in the same folder where whatsapp.apk was already present

ALIGN APK
Click on APK Alignment Tab

1. Click on "Load APK file" button
2. Browse for "whatsapp_SIGNED_UNALIGNED.apk
3. Click on "Align" button
4. Wait until the message appears "Alignment done, output file: "whatsapp_SIGNED_ALIGNED.apk"
5. Optional - If you want to verify the alignment, click on "whatsapp_SIGNED_UNALIGNED" button - note that after the alignment, the button name remained same
6. browse for "whatsapp_SIGNED_ALIGNED.apk
7. Click on button verify
8. it will give you a message, "Verification succesful"

TROUBLESHOOTING

If you get java,util exception error, you need to use JDK-6 or lower and give its path in JDK target adress bar
JDK-7 and plus have changed something for which APK signer doesnt sign APKs

Plz click Thanks buttong if it helped u

Tutorial bikin Module Xposed

Tutorial 1 - Setting up

There are a few requirements for making an Xposed Module.
*Eclipse, or Java IDE of your choice, with Android SDK and devlopment enviornment set up. I'm not going to cover that in this tutorial
*Knowledge of Java programming language
*An android phone which supports Xposed, with Xposed installed and working for testing on
*Some knowledge of Android development
*Time
*
An idea of course
For the purpose of this tutorial, we will be creating a two modules (using two different features of the xposed bridge). The first will replace the clock in the status bar with a smiley face. The second will change the height of the navigation bar. I will be using Eclipse Kepler in this tutorial.

NEW: this tool will setup the project for you! http://forum.xda-developers.com/show....php?t=2712825


Firstly you must set up an Android project as normal. For the target API, use the one you have on your test device. Mine is Android 4.0.4, API 15 so I will use that. Name the project Smiley Clock, and choose a package name.

We won't need an Activity for this module, so don't create one



OK, that's the project created. Now we need to make Xposed recognize this as a module. Add the following meta tags to your Android Manifest, within the Application tag

Code:

<meta-data
            android:name="xposedmodule"
            android:value="true" />
        <meta-data
            android:name="xposedminversion"
            android:value="30" />
        <meta-data
            android:name="xposeddescription"
            android:value="Add a smiley face" />

At this point you can run the application on your test device. It should show up in the Xposed Installer app as a module. Check the box to enable your module and reboot your device. Of course, the module won't do anything yet!

A good idea at this point would be to add a new filter to your logcat to track error messages from Xposed. Add a filter named "Xposed" and filter by the tag name "Xposed"



You will now see messages from the Xposed Framework



There will be an error for your module about xposed_init file, don't worry, getting to that!

Make a new package (same as package name we used when making the Android Project) and within that package make a class. Call it anything, I'll call mine Main.



Secondly add the XposedBridge API jar. This can be found on this thread on XDA. Add the jar to the root directory of the project, NOT the lib directory. Right click - build path - add to build path. Do not export it in the Order and Export tab.

Now create a file in the assets directory called xposed_init. Inside this file, type:

packagename.classname

where packname is the name of your package and class name is the name of your class. So in my case I will type

com.hamzah.smileyclock.Main

This tells Xposed where to look for the code for the module. You file tree should now look like this



Now the project is set up. In the next tutorial, we will look at how Xposed works, this will help you understand how to make modules.

Tutorial 2 - Brief introduction to how Xposed works

This tutorial is not really a true tutorial (gasp!). It will outline some basic features of Xposed which will help you understand future tutorials.
Xposed allows a developer to access and modify the code for system applications. For example, one useful feature is the "find and hook" feature. This allows a developer to find a method inside another application and add their own code after it. So you could find the method in the Android source code that alerts the user when the wrong pattern is entered, and then instruct the system to hook onto that method and edit the alert to say something else. Another thing that Xposed allows us to do is replace resources. This includes Strings dimensions, drawables and much more. So we could edit the dimension of the navigation bar height (which we will in later tutorials) by replacing the resource which tells it what height to be.

The next tutorial, we will start exploring the Android code and see what methods to hook to replace the clock with a smiley face!

Tutorial 3 - Exploring the target and modifying it

Ok so at this point, you should have an Xposed mod thatdoes nothing. The next step is to work out exactly what we want it to do! We want it to edit the clock, by hooking the method (read the last tutorial for more informtion on this). So the first step is to find that method.

So visit http://grepcode.com/project/reposito...droid/android/ in your browser to view Android's source code. If (in Android 4+) you browse to com.android.systemui.statusbar.policy.Clock.java
you will find the class that controls the clock. In here, there is a handy method called updateClock() which ppears to be controlling what gets written to the TextView in the statusbar (this whole class extends TextView). Now if you know how to make Android apps (which you should) you will be familiar with TextView. We can manipulate this TextView by changing colour, text, font, size etc, as you could with a TextView in a normal Android app.

Of course this was easy, but depending on exactly what you want your module to do, you may have to hook many methods. If you've ever modded APK's, you'll know what i mean ;)

This was another short tutorial, in the next one we will start coding the module

Tutorial 4 - The Code

In this tutorial we can finally get to some code. Exciting right?
OK so we now have the following information
*We can hook methods using Xposed
*There happens to be a method which writes text to the clock
*We can hook this method to edit the text

So first of all, fire up your eclipse workspace and have you Xposed class implement IXposedHookLoadPackage
Then add unimplemented methods.
Your class should now look like:

Code:

package com.hamzah.smileyclock;

import de.robv.android.xposed.IXposedHookLoadPackage;
import de.robv.android.xposed.callbacks.XC_LoadPackage.LoadPackageParam;

public class Main implements IXposedHookLoadPackage {

 @Override
 public void handleLoadPackage(LoadPackageParam lpparam) throws Throwable {
  
 }

}

The method that we are overriding gets called every time the user or system opens an app. We can use the parameter of the method to check when systemui gets loaded, then hook into it and modify the clock. Easy right?

Add this inside your method

Code:

if (!lpparam.packageName.equals("com.android.systemui"))//check if the package being loaded is systemUI
            return;
//All code here is only called if it is indeed SystemUI

So now we need our hook, add this code after the return:

Code:

findAndHookMethod("com.android.systemui.statusbar.policy.Clock", lpparam.classLoader, "updateClock", new XC_MethodHook() {
            @Override
            protected void afterHookedMethod(MethodHookParam param) throws Throwable {
             
            }
 });

NOTE: this will only work because updateClock doesn't need any parameters. If the method you want to hook does, see tutorial 9

You must also add the following imports statements

Code:

import de.robv.android.xposed.IXposedHookLoadPackage;
import de.robv.android.xposed.XC_MethodHook;
import de.robv.android.xposed.callbacks.XC_LoadPackage.LoadPackageParam;
import static de.robv.android.xposed.XposedHelpers.findAndHookMethod;

Explanation: The findAndHookMethod is hooking onto com.android.systemui.statusbar.policy.Clock
The afterHookedMethod allows us to add our own code after the system method is executed, so in this case, the code to add a smiley face will go here. The MethodHookParam allows us to modify the TextView of the method we are hooking. So we need to get hold of that TextView, add this code

Code:

TextView tv = (TextView) param.thisObject;

This is the TextView containing the clock, whatever we do with this TextView at this point, will happen to the TextView in the statusbar, So now simply add

Code:

tv.setText(":)");

This will replace the clock with a smiley face. Alternatively, use

Code:

tv.appendText(":)");

to keep the time and add the smiley after it

Now deploy the app to your test device, and reboot. You should see a smiley face in place of the clock!

Full Code

Code:

package com.hamzah.smileyclock;

import static de.robv.android.xposed.XposedHelpers.findAndHookMethod;
import android.widget.TextView;
import de.robv.android.xposed.IXposedHookLoadPackage;
import de.robv.android.xposed.XC_MethodHook;
import de.robv.android.xposed.callbacks.XC_LoadPackage.LoadPackageParam;

public class Main implements IXposedHookLoadPackage {

 @Override
 public void handleLoadPackage(LoadPackageParam lpparam) throws Throwable {
  if (!lpparam.packageName.equals("com.android.systemui"))
            return;
  
   findAndHookMethod("com.android.systemui.statusbar.policy.Clock", lpparam.classLoader, "updateClock", new XC_MethodHook() {
            @Override
            protected void afterHookedMethod(MethodHookParam param) throws Throwable {
             TextView tv = (TextView) param.thisObject;
             tv.setText(":)");
             
            }
 });
 }
}

That's it for SmileyClock, in the next tutorial, we will look at another feature of Xposed, that is, replacing resources, and will enable/disable the screen wake up on unplug and also edit the height of the system navigation bar.

Tutorial 5 - Replacing Resources

Xposed allows us to replace resources such as String, int, boolean, dimen, or even drawables. In this tutorial we will enable/disable screen wake-up on unplug and in the next one, replace the dimen of navigation bar height and width to make it half size. Simple resources like int and String can be replaced by passing the new value as a parameter but more complex ones like drawable and dimen must be referenced from your own resources. Don't worry, I'll explain it all!

First, we will replace a boolean which tells the system whether or not to wake the screen on unplug. There is a boolean in the framework-res.apk (found in /system/framework) which tells the system this information. We can used Xposed to edit this value, without touching the APK. My phone's default is false so I'm going to make it true, if yours is already true, make it false to make it more noticeable. In a future tutorial, when we learn saving preferences, we will add the ability for the user to set the value. For now, it will be hard coded.

Firstly set up a new project as in tutorial 1. Call it anything. Again, no activity or icon required, though you might want an icon anyway.

Have your class implement IXposedHookZygoteInit

and add unimplemented methods. This is called before anything else and we will use it for replacing our resource.

Add this code inside the initZygote method

Code:

XResources.setSystemWideReplacement("android", "bool", "config_unplugTurnsOnScreen", false);

android is the package name of framework-res, bool is the type of resource (boolean) "config_unplugTurnsOnScreen" is the variable we are replacing and false is the new value.

Now when you run this module, enable and reboot, you should find that if you plug in a charger, turn off the screen, and unplug it, nothing will happen. If you were to change it to TRUE instead of FALSE, when you unplugged, it would wake the screen.

In the text tutorial, we will replace the navigation bar height

Tutorial 6 - Complex Resources

In this tutorial we will change the height of the navigation bar to 36dp, normal is 48dp. Much is the same as last time, but there are a few differences. Once again, set up a new project. Have your module class implement IXposedHookZygoteInit once again. Also implement IXposedHookInitPackageResources
Add the unimplemented methods.

Make a new variable inside the initZygote method:

Code:

String MODULE_PATH = startupParam.modulePath;

In the handleInitPackageResources method, add

Code:

if (!resparam.packageName.equals("android"))
          return;

Now we know we are in the right package

Add:

Code:

XModuleResources modRes = XModuleResources.createInstance(MODULE_PATH, resparam.res);

Use CTRL-SHIFT-O in Eclipse to import the necessary packages.

Next we need a dimen resource to forward as the height of the navigation bar. Make a new XML files inside /values called dimens.xml. Add this inside it

Code:

    36dp

Now all that's left is to forward this to be used. Add this code inside handleInitPackageResources

Code:

XResources.setSystemWideReplacement("android", "dimen", "navigation_bar_height", modRes.fwd(R.dimen.navigationbarSize));

The first 3 parameters are the same as the ones in tutorial 5. The last one has the same function as in the las tutorial, but rather than passing a variable, we are forwarding a resource. This could also be done with drawables, I once made a module to replace all buttons on the navigation bar with the ones found on Xperia ROM's.

At this point, when you deploy the module, enable it and reboot, your navigation bar should be noticeably smaller.

In the next tutorial we will look at creating and user interfaces and saving data in ways that both interface and module can read and write to. We will be using the mod we made in tutorial 4, and allow the user to define text rather than have a smiley face.

Tutorial 7 - User Interfaces and Preferences

Open up the SmileyClock we made in Tutorial 4. We did not make an Activity so make one now, File>New>Android Activity. Make sure you make it a Launcher Activity. We need to widgets in our UI, a textbox and an Apply button. I'm not going to cover making these, just make sure you have a method called when the button is pressed. Make the EditText id "input" so it will be easier to follow the tutorial because that is what i am making mine.

When the apply button is pressed in my case this method is called

Code:

public void apply(){
EditText et = (EditText) findViewById(R.id.input);
String input = et.getText().toString();
}

So now I have the user input as a String, I need to save it. Use Android SharedPreferences for this,

Code:

SharedPreferences pref = getSharedPreferences("user_settings", MODE_WORLD_READABLE);

The mode world readable is crucial to allow the Xposed Module to read it, otherwise you will get permission denied. Now get the Editor and save this string as "user_text",

Code:

Editor editor = pref.edit();
editor.putString("user_text", input);

Now it is saved, we need the Xposed Module to read it. Switch back to the class containing the Xposed Module, the one we made in tutorial 4. Find this line:

Code:

tv.setText(":)");

Instead, replace it with this

Code:

XSharedPreferences pref = new XSharedPreferences("com.hamzah.smileyclock", "user_settings");
//Gets the shared preference 
String text = pref.getString("user_text", "");
//reads the value which is saves, using nothing as default value to use if nothing is saved
tv.setText(text);
//sets the text to saved value

When you deploy this and set some text, that text should then appear in the status bar after the clock. Note that when you save this value, it will not change in the statusbar until you restart SystemUI. It might change when time changes, not sure.

In the next tutorial we will cover modifying layouts

Tutorial 8 - Modifying Layouts

Xposed lets us modify layouts in other apps. In this tutorial, we will modify the navigation bar with various tweaks. Firstly we will make the background blue. So make a new Xposed Project and have your module class implement IXposedHookInitPackageResources. This gives is a parameter that can be used for modifying layouts. Add the unimplemented method and add this code inside the method

Code:

 resparam.res.hookLayout("com.android.systemui", "layout", "navigation_bar", new XC_LayoutInflated() {
         @Override
         public void handleLayoutInflated(LayoutInflatedParam liparam) throws Throwable {
          
         }
     });

com.android.systemui is the package name for the app containing the navigation bar View, layout is the type of resource, navigation_bar is the View name as defined in /res/layout (of SystemUI.apk). Now we need to get a View object for the navigation bar. Add this code inside the overriden method

Code:

         @Override
  public void handleLayoutInflated(LayoutInflatedParam liparam) throws Throwable {
         View navbar = (View) liparam.view.findViewById(
                     liparam.res.getIdentifier("nav_buttons", "id", "com.android.systemui"));
     }

We have gotten the view using the findViewById method, and passing in the ids. We know the id is "nav_buttons" because if we look at /res/layouts/navigation_bar.xml in SystemUI.apk, we see this

Code:

<?xml version="1.0" encoding="utf-8"?>
<com.android.systemui.statusbar.phone.NavigationBarView android:background="#ff000000" android:layout_width="fill_parent" android:layout_height="fill_parent"
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:systemui="http://schemas.android.com/apk/res/com.android.systemui">
    <FrameLayout android:id="@id/rot0" android:layout_width="fill_parent" android:layout_height="fill_parent">
        <LinearLayout android:orientation="horizontal" android:id="@id/nav_buttons" android:clipChildren="false" android:clipToPadding="false" android:layout_width="fill_parent" android:layout_height="fill_parent" android:animateLayoutChanges="true">
            <View android:visibility="invisible" android:layout_width="40.0dip" android:layout_height="fill_parent" android:layout_weight="0.0" />
            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@id/back" android:layout_width="80.0dip" android:layout_height="fill_parent" android:src="@drawable/ic_sysbar_back" android:layout_weight="0.0" android:contentDescription="@string/accessibility_back" systemui:keyCode="4" systemui:glowBackground="@drawable/ic_sysbar_highlight" />
            <View android:visibility="invisible" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1.0" />
            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@id/home" android:layout_width="80.0dip" android:layout_height="fill_parent" android:src="@drawable/ic_sysbar_home" android:layout_weight="0.0" android:contentDescription="@string/accessibility_home" systemui:keyCode="3" systemui:keyRepeat="false" systemui:glowBackground="@drawable/ic_sysbar_highlight" />
            <View android:visibility="invisible" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1.0" />
            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@id/recent_apps" android:layout_width="80.0dip" android:layout_height="fill_parent" android:src="@drawable/ic_sysbar_recent" android:layout_weight="0.0" android:contentDescription="@string/accessibility_recent" systemui:glowBackground="@drawable/ic_sysbar_highlight" />
            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@id/menu" android:visibility="invisible" android:layout_width="40.0dip" android:layout_height="fill_parent" android:src="@drawable/ic_sysbar_menu" android:layout_weight="0.0" android:contentDescription="@string/accessibility_menu" systemui:keyCode="82" systemui:glowBackground="@drawable/ic_sysbar_highlight" />
        </LinearLayout>
        <LinearLayout android:orientation="horizontal" android:id="@id/lights_out" android:visibility="gone" android:layout_width="fill_parent" android:layout_height="fill_parent">
            <ImageView android:layout_width="80.0dip" android:layout_height="fill_parent" android:layout_marginLeft="40.0dip" android:src="@drawable/ic_sysbar_lights_out_dot_small" android:scaleType="center" android:layout_weight="0.0" />
            <View android:visibility="invisible" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1.0" />
            <ImageView android:layout_width="80.0dip" android:layout_height="fill_parent" android:src="@drawable/ic_sysbar_lights_out_dot_large" android:scaleType="center" android:layout_weight="0.0" />
            <View android:visibility="invisible" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1.0" />
            <ImageView android:layout_width="80.0dip" android:layout_height="fill_parent" android:layout_marginRight="40.0dip" android:src="@drawable/ic_sysbar_lights_out_dot_small" android:scaleType="center" android:layout_weight="0.0" />
        </LinearLayout>
        <View android:layout_gravity="top" android:id="@id/deadzone" android:clickable="true" android:layout_width="fill_parent" android:layout_height="@dimen/navigation_bar_deadzone_size" />
    </FrameLayout>
    <FrameLayout android:id="@id/rot90" android:paddingTop="0.0dip" android:visibility="gone" android:layout_width="fill_parent" android:layout_height="fill_parent">
        <LinearLayout android:orientation="vertical" android:id="@id/nav_buttons" android:clipChildren="false" android:clipToPadding="false" android:layout_width="fill_parent" android:layout_height="fill_parent" android:animateLayoutChanges="true">
            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@id/menu" android:visibility="invisible" android:layout_width="fill_parent" android:layout_height="40.0dip" android:src="@drawable/ic_sysbar_menu_land" android:layout_weight="0.0" android:contentDescription="@string/accessibility_menu" systemui:keyCode="82" systemui:glowBackground="@drawable/ic_sysbar_highlight_land" />
            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@id/recent_apps" android:layout_width="fill_parent" android:layout_height="80.0dip" android:src="@drawable/ic_sysbar_recent_land" android:layout_weight="0.0" android:contentDescription="@string/accessibility_recent" systemui:glowBackground="@drawable/ic_sysbar_highlight_land" />
            <View android:visibility="invisible" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1.0" />
            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@id/home" android:layout_width="fill_parent" android:layout_height="80.0dip" android:src="@drawable/ic_sysbar_home_land" android:layout_weight="0.0" android:contentDescription="@string/accessibility_home" systemui:keyCode="3" systemui:keyRepeat="false" systemui:glowBackground="@drawable/ic_sysbar_highlight_land" />
            <View android:visibility="invisible" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1.0" />
            <com.android.systemui.statusbar.policy.KeyButtonView android:id="@id/back" android:layout_width="fill_parent" android:layout_height="80.0dip" android:src="@drawable/ic_sysbar_back_land" android:layout_weight="0.0" android:contentDescription="@string/accessibility_back" systemui:keyCode="4" systemui:glowBackground="@drawable/ic_sysbar_highlight_land" />
            <View android:visibility="invisible" android:layout_width="fill_parent" android:layout_height="40.0dip" android:layout_weight="0.0" />
        </LinearLayout>
        <LinearLayout android:orientation="vertical" android:id="@id/lights_out" android:visibility="gone" android:layout_width="fill_parent" android:layout_height="fill_parent">
            <ImageView android:layout_width="fill_parent" android:layout_height="80.0dip" android:layout_marginTop="40.0dip" android:src="@drawable/ic_sysbar_lights_out_dot_small" android:scaleType="center" android:layout_weight="0.0" />
            <View android:visibility="invisible" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1.0" />
            <ImageView android:layout_width="fill_parent" android:layout_height="80.0dip" android:src="@drawable/ic_sysbar_lights_out_dot_large" android:scaleType="center" android:layout_weight="0.0" />
            <View android:visibility="invisible" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1.0" />
            <ImageView android:layout_width="fill_parent" android:layout_height="80.0dip" android:layout_marginBottom="40.0dip" android:src="@drawable/ic_sysbar_lights_out_dot_small" android:scaleType="center" android:layout_weight="0.0" />
        </LinearLayout>
        <View android:layout_gravity="left" android:id="@id/deadzone" android:clickable="true" android:layout_width="@dimen/navigation_bar_deadzone_size" android:layout_height="fill_parent" />
    </FrameLayout>
    <View android:id="@id/rot270" android:visibility="gone" android:layout_width="fill_parent" android:layout_height="fill_parent" />
</com.android.systemui.statusbar.phone.NavigationBarView>

Now we can call methods we could normally call on a View object. Add

Code:

navbar.setBackgroundColor(Color.BLUE);

When you run this on your phone, your navigation bar will be blue. Now of course you can also call other methods, such as adding in new TextView's or whatever. If you were to inspect the code more closely, you would find there are also ids called "home" "back" and "recent_apps". You could use these to mess around with the buttons, though I cannot imagine what!

Tutorial 9 - Methods with parameters

In an earlier tutorial, we covered hooking methods. But what if a method wants a parameter too?

Say if i want to hook onCreate(Bundle savedInstances) in com.android.settings

If i hook it using

Code:

findAndHookMethod("com.android.settings.Settings", lpparam.classLoader, "onCreate", new XC_MethodHook() {
            
 });

It will throw a methodNotFound error. So we need to specify the parameters. The method wants a Bundle object. So add Bundle.class as a parameter

Code:

findAndHookMethod("com.android.settings.Settings", lpparam.classLoader, "onCreate", Bundle.class, new XC_MethodHook() {
            
 });

Now lets pretend Bundle.class isnt in the SDK and is a system class so cant be referenced. I would use a String instead:

"android.os.Bundle"

Code:

findAndHookMethod("com.android.settings.Settings", lpparam.classLoader, "onCreate", "android.os.Bundle", new XC_MethodHook() {
            
 });