Android Detect Turn From Phone

I want to detect, if my smartphone user turn left or right or doing a turn around. Here an example to explain 'turn right': The User faces a crossroad. Now I want to detect if my u

Solution 1:

use this program. whenever you turn left or right and up and down, you will get horizontal and vertical notification like arrow image..and you will get that coordinates.

package com.authorwjf;

 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.content.Context;
 import android.hardware.Sensor;
 import android.hardware.SensorEvent;
 import android.hardware.SensorEventListener;
 import android.hardware.SensorManager;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.ImageView;
 import android.widget.TextView;

 @SuppressLint("NewApi")publicclassMainextendsActivityimplementsSensorEventListener {

privatefloat mLastX, mLastY, mLastZ;
privateboolean mInitialized;
private SensorManager mSensorManager;
 private Sensor mAccelerometer;
 privatefinalfloatNOISE= (float) 2.0;

/** Called when the activity is first created. */@OverridepublicvoidonCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    mInitialized = false;
    mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
    mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
    mSensorManager.registerListener(this,
  mAccelerometer ,  SensorManager.SENSOR_DELAY_NORMAL);
 }

protectedvoidonResume() {
    super.onResume();
    mSensorManager.registerListener(this, 
 mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);
 }

 protectedvoidonPause() {
    super.onPause();
    mSensorManager.unregisterListener(this);
 }

@OverridepublicvoidonAccuracyChanged(Sensor sensor, int accuracy) {
    // can be safely ignored for this demo
}

@OverridepublicvoidonSensorChanged(SensorEvent event) {
    TextView tvX= (TextView)findViewById(R.id.x_axis);
    TextView tvY= (TextView)findViewById(R.id.y_axis);
    TextView tvZ= (TextView)findViewById(R.id.z_axis);
    ImageViewiv= (ImageView)findViewById(R.id.image);
    floatx= event.values[0];
    floaty= event.values[1];
    floatz= event.values[2];
    if (!mInitialized) {
        mLastX = x;
        mLastY = y;
        mLastZ = z;
        tvX.setText("0.0");
        tvY.setText("0.0");
        tvZ.setText("0.0");
        mInitialized = true;
    } else {
        floatdeltaX= Math.abs(mLastX - x);
        floatdeltaY= Math.abs(mLastY - y);
        floatdeltaZ= Math.abs(mLastZ - z);
        if (deltaX < NOISE) deltaX = (float)0.0;
        if (deltaY < NOISE) deltaY = (float)0.0;
        if (deltaZ < NOISE) deltaZ = (float)0.0;
        mLastX = x;
        mLastY = y;
        mLastZ = z;
        tvX.setText(Float.toString(deltaX));
        tvY.setText(Float.toString(deltaY));
        tvZ.setText(Float.toString(deltaZ));
        iv.setVisibility(View.VISIBLE);
        if (deltaX > deltaY) {
            iv.setImageResource(R.drawable.horizontal);
        } elseif (deltaY > deltaX) {
            iv.setImageResource(R.drawable.vertical);
        } else {
            iv.setVisibility(View.INVISIBLE);
        }
    }
}
 }

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:orientation="vertical"android:layout_width="fill_parent"android:layout_height="fill_parent"><TextViewandroid:paddingTop="20dip"android:layout_width="fill_parent"android:layout_height="wrap_content"android:textSize="16sp"android:textStyle="bold"android:gravity="center"android:text="Shaker Demo"/><TableLayoutandroid:paddingTop="10dip"android:layout_width="fill_parent"android:layout_height="wrap_content"android:stretchColumns="*"><TableRow><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:textSize="14sp"android:text="X-Axis"android:gravity="center"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:textSize="14sp"android:text="Y-Axis"android:gravity="center"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:textSize="14sp"android:text="Z-Axis"android:gravity="center"/></TableRow><TableRow><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/x_axis"android:gravity="center"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/y_axis"android:gravity="center"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/z_axis"android:gravity="center"/></TableRow></TableLayout><ImageViewandroid:paddingTop="10dip"android:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/image"android:layout_gravity="center"android:visibility="invisible"/></LinearLayout>