How to use a Sensor of "TYPE_STEP_DETECTOR"

A sensor of this type triggers an event each time a step is taken by the user.

http://developer.android.com/reference/android/hardware/Sensor.html#TYPE_STEP_DETECTOR

Initialize Sensor

We have to get a Sensor's Object from SensorManager.
Set the type "Sensor.TYPE_STEP_DETECTOR".

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public class StepCounterActivity extends Activity {     private SensorManager mSensorManager;     private Sensor mStepSensor;     private TextView mTextView;       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);           mTextView = (TextView) findViewById(R.id.text_step);           mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);         mStepSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_STEP_DETECTOR);       }       protected void onResume() {         super.onResume();         mSensorManager.registerListener(mSensorEventListener, mStepSensor,                 SensorManager.SENSOR_DELAY_NORMAL);     }       protected void onPause() {         super.onPause();         mSensorManager.unregisterListener(mSensorEventListener);     }

Create a SensorListener

We can get a trigger from onSensorChanged.

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private SensorEventListener mSensorEventListener = new SensorEventListener() {     private int mStep;       @Override     public void onAccuracyChanged(Sensor sensor, int accuracy) {       }       @Override     public void onSensorChanged(SensorEvent event) {         if (event.values[0] == 1.0f) {             mStep++;         }         mTextView.setText(Integer.toString(mStep));     } };

How to use a Sensor of "TYPE_STEP_COUNTER"

Android API 19 add Sensor of "TYPE_STEP_COUNTER".

http://developer.android.com/reference/android/hardware/Sensor.html#TYPE_STEP_COUNTER

Initialize Sensor

We have to get a Sensor's Object from SensorManager.
Set the type "Sensor.TYPE_STEP_COUNTER".

public class StepCounterActivity extends Activity {
    private SensorManager mSensorManager;
    private Sensor mStepSensor;
    private TextView mTextView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mTextView = (TextView) findViewById(R.id.text_step);

        mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
        mStepSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_STEP_COUNTER);

    }

    protected void onResume() {
        super.onResume();
        mSensorManager.registerListener(mSensorEventListener, mStepSensor,
                SensorManager.SENSOR_DELAY_NORMAL);
    }

    protected void onPause() {
        super.onPause();
        mSensorManager.unregisterListener(mSensorEventListener);
    }

Create a SensorListener

We can get a step from onSensorChanged.
"event.values[0]" is a step counter.A sensor of this type returns the number of steps taken by the user since the last reboot while activated. The value is returned as a float (with the fractional part set to zero) and is reset to zero only on a system reboot.

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private SensorEventListener mSensorEventListener = new SensorEventListener() {     private float mStepOffset;       @Override     public void onAccuracyChanged(Sensor sensor, int accuracy) {       }       @Override     public void onSensorChanged(SensorEvent event) {         if (mStepOffset == 0) {             mStepOffset = event.values[0];         }         mTextView.setText(Float.toString(event.values[0] - mStepOffset));     } };

How to use the DrawerLayout like a slide menu of the "Google Play"

Android Developers Site

http://developer.android.com/training/implementing-navigation/nav-drawer.html

Creat a layout file

You shoud create a layout file using DrawerLayout in android.support.v4.widget.

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <!-- The main content view -->

    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <!-- The navigation drawer -->

    <ListView
        android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="#111"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp" />

</android.support.v4.widget.DrawerLayout>

Set in Activity

We set ActionBarDrawerToggle.
We call "setHomeButtonEnabled(true)" and "setDisplayHomeAsUpEnabled(true)", in order to enable the click of an icon on ActionBar.

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@Override public void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_drawerlayout);       mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);       mTitle = getTitle();     mDrawerTitle = getText(R.string.drawer_open);     mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);     mDrawerToggle = new ActionBarDrawerToggle(             this, /* host Activity */             mDrawerLayout, /* DrawerLayout object */             R.drawable.ic_drawer, /* nav drawer icon to replace 'Up' caret */             R.string.drawer_open, /* "open drawer" description */             R.string.drawer_close /* "close drawer" description */             ) {                   /**                  * Called when a drawer has settled in a completely closed                  * state.                  */                 public void onDrawerClosed(View view) {                     getActionBar().setTitle(mTitle);                 }                   /**                  * Called when a drawer has settled in a completely open                  * state.                  */                 public void onDrawerOpened(View drawerView) {                     getActionBar().setTitle(mDrawerTitle);                 }             };       // Set the drawer toggle as the DrawerListener     mDrawerLayout.setDrawerListener(mDrawerToggle);       getActionBar().setDisplayHomeAsUpEnabled(true);     getActionBar().setHomeButtonEnabled(true); }

Add OpenGL with hardware rendering on JellybeanOnBeaglebone_WithSGX for Beagle Bone Black

If you would like to use OpenGL ES 2.0 with hardware rendering, you should add modification.

Mod egl.cfg

\device\ti\beagleboard\egl.cfg

0 0 android
0 1 POWERVR_SGX530_125 <- add line !!

Mod build.prop

\device\ti\beagleboard\beagleboard.mk

PRODUCT_PROPERTY_OVERRIDES := \
net.dns1=8.8.8.8 \
net.dns2=8.8.4.4 \
ro.opengles.version=131072 <- add line !!

Building JellybeanOnBeaglebone_WithSGX for Beagle Bone Black

Get the Files

  $ repo init -u git://gitorious.org/rowboat/manifest.git -m rowboat-jb-am335x.xml
  $ repo sync $

Toolchain Setup

Setup the tool-chain path to point to arm-eabi- tools in prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin/

  $ export PATH=/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin:$PATH

Build Boot Loader (MLO/u-boot)

Change directory to u-boot

  $ cd u-boot

Execute following commands

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$ make CROSS_COMPILE=arm-eabi- distclean $ make CROSS_COMPILE=arm-eabi- am335x_evm_config $ make CROSS_COMPILE=arm-eabi-

Build Android, Kernel and SGX

  $ make TARGET_PRODUCT=beagleboneblack OMAPES=4.x

Create Root Filesystem Tarball

Prepare the root filesystem as follows:

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$ cd <android source="">   $ make TARGET_PRODUCT=beagleboneblack fs_tarball </android>

Flash SD Card

Copy compiled Images to image folder and create a bootable SD card as follows.

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$ mkdir image_folder $ cd image_folder $ cp ../kernel/arch/arm/boot/uImage . $ cp ../u-boot/MLO . $ cp ../u-boot/u-boot.img . $ cp ../external/ti_android_utilities/am335x/u-boot-env/uEnv_beagleboneblack.txt . $ cp ../out/target/product/beagleboneblack/rootfs.tar.bz2 . $ cp ../external/ti_android_utilities/am335x/mk-mmc/mkmmc-android.sh . $ sudo ./mkmmc-android.sh YOUR_SD_CARD MLO u-boot.img uImage uEnv_beagleboneblack.txt rootfs.tar.bz2

TI official image of Android On Beagle Bone Black

You can get 'release information' of Beagle Bone Black's Android.
http://downloads.ti.com/sitara_android/esd/TI_Android_DevKit/TI_Android_JB_4_2_2_DevKit_4_1_1/index_FDS.html

I got offical TI image Of Android 4.2.2, and install to beagle bone black.

$ wget http://downloads.ti.com/sitara_android/esd/TI_Android_DevKit/TI_Android_JB_4_2_2_DevKit_4_1_1/exports/TI_Android_JB_4.2.2_DevKit_4.1.1_beagleboneblack.tar.gz
$ tar xzvf TI_Android_JB_4.2.2_DevKit_4.1.1_beagleboneblack.tar.gz
$ cd beagleboneblack
$ sudo ./mkmmc-android.sh /dev/

copyed to log.

Assuming Default Locations for Prebuilt Images
All data on /dev/sdb now will be destroyed! Continue? [y/n]
y
[Unmounting all existing partitions on the device ]
umount: /dev/sdb: not mounted
umount: /dev/sdb2: not mounted
[Partitioning /dev/sdb...]
Disk /dev/sdb doesn't contain a valid partition table
DISK SIZE - 7851737088 bytes
CYLINDERS - 954
[Making filesystems...]
[Copying files...]
[Copying START_HERE folder to boot partition]
umount: /mnt: device is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))
[Copying all clips to data partition]
[Done]

Takes a long time to start Android...Please wait 10 minutes.