SensorManager Demo : SensorManager « Hardware « Android

1. Android
2. Hardware
3. SensorManager

SensorManager Demo

 
//main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <TableLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:stretchColumns="0,1,2">
    <TableRow
      android:layout_weight="1">
      <View
        android:id="@+id/top"
        android:layout_column="1"
      />
    </TableRow>
    <TableRow
      android:layout_weight="1">
      <View
        android:id="@+id/left"
        android:layout_column="0"
      />
      <View
        android:id="@+id/right"
        android:layout_column="2"
      />
    </TableRow>
    <TableRow
      android:layout_weight="1">
      <View
        android:id="@+id/bottom"
        android:layout_column="1"
      />
    </TableRow>
  </TableLayout>
  <TextView  
    android:id="@+id/values"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_alignParentBottom="true"
  />
</RelativeLayout>
package app.test;

import android.app.Activity;
import android.graphics.Color;
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.TextView;

public class Test extends Activity implements SensorEventListener {
    
    private SensorManager mSensorManager;
    private Sensor mAccelerometer;
    private TextView valueView;
    private View mTop, mBottom, mLeft, mRight;
    
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
        mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
        
        valueView = (TextView)findViewById(R.id.values);
        mTop = findViewById(R.id.top);
        mBottom = findViewById(R.id.bottom);
        mLeft = findViewById(R.id.left);
        mRight = findViewById(R.id.right);
    }

    protected void onResume() {
        super.onResume();
        mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_UI);
    }

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

    public void onAccuracyChanged(Sensor sensor, int accuracy) { }

    public void onSensorChanged(SensorEvent event) {
        float[] values = event.values;
        float x = values[0]/10;
        float y = values[1]/10;
        int scaleFactor;
        
        if(x > 0) {
            scaleFactor = (int)Math.min(x*255, 255);
            mRight.setBackgroundColor(Color.TRANSPARENT);
            mLeft.setBackgroundColor(Color.argb(scaleFactor, 255, 0, 0));
        } else {
            scaleFactor = (int)Math.min(Math.abs(x)*255, 255);
            mRight.setBackgroundColor(Color.argb(scaleFactor, 255, 0, 0));
            mLeft.setBackgroundColor(Color.TRANSPARENT);
        }
        
        if(y > 0) {
            scaleFactor = (int)Math.min(y*255, 255);
            mTop.setBackgroundColor(Color.TRANSPARENT);
            mBottom.setBackgroundColor(Color.argb(scaleFactor, 255, 0, 0));
        } else {
            scaleFactor = (int)Math.min(Math.abs(y)*255, 255);
            mTop.setBackgroundColor(Color.argb(scaleFactor, 255, 0, 0));
            mBottom.setBackgroundColor(Color.TRANSPARENT);
        }
        valueView.setText(String.format("X: %1$1.2f, Y: %2$1.2f, Z: %3$1.2f",
                values[0], values[1], values[2]));
    }
}

   
  

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