gistfile1.java

import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorManager;
import android.util.DisplayMetrics;
import android.util.Log;
import android.widget.Toast;

public class CommonUtils {
	private static final float ONE_DIP = 1;
	private static final float ONE_PIX = 1;
	
	
	/**
	 * HVGA屏density=160
     * QVGA屏density=120
     * WVGA屏density=240
     * WQVGA屏density=120
     * http://developer.android.com/guide/practices/screens_support.html
	 * */
	public static void dp2px(Context context) {
		final float scale = context.getResources().getDisplayMetrics().density;
		int px = (int) ( ONE_DIP * scale + 0.5f);
		Toast.makeText(context, "1 dip = "+px+ " px", Toast.LENGTH_LONG).show();
	}
	
	//if the device use navigation bar, it can not get the correct resolution
	public static void getScreenResolution(Activity activity) {
		DisplayMetrics displayMetrics = new DisplayMetrics();
		activity.getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
		String string = "Device Resolution is:" + displayMetrics.widthPixels + "x" + displayMetrics.heightPixels;
		Toast.makeText(activity, string, Toast.LENGTH_LONG).show();
	}
	
	public int getStatusBarHeight(Context context) {
	      int statusBarHeight = 0;
	      int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
	      if (resourceId > 0) {
	    	  statusBarHeight = context.getResources().getDimensionPixelSize(resourceId);
	      }
	      return statusBarHeight;
	}
	
	public int getNavigationBarHeight(Context context) {
		int navigationBarHeight = 0;
		int resourceId = context.getResources().getIdentifier("navigation_bar_height", "dimen", "android");
		if (resourceId > 0) {
			navigationBarHeight = context.getResources().getDimensionPixelSize(resourceId);
		}
		return navigationBarHeight;
	}
	
	public static void getSensors(Context context) {
		SensorManager sm = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE);
      List<Sensor> allSensors = sm.getSensorList(Sensor.TYPE_ALL);

      //Show the Sensor information   
      for (Sensor s : allSensors) {  


        switch (s.getType()) {  
        case Sensor.TYPE_ACCELEROMETER:
        	Log.i("Seven", "accelerometer");
            break;  
        case Sensor.TYPE_GRAVITY:
        	Log.i("Seven", "gravity API 9");
            break;  
        case Sensor.TYPE_GYROSCOPE:
        	Log.i("Seven", "gyroscope");
            break;  
        case Sensor.TYPE_LIGHT:  
        	Log.i("Seven", "light_sensor");
            break;  
        case Sensor.TYPE_LINEAR_ACCELERATION:
        	Log.i("Seven", "LINEAR_ACCELERATION API9");
            break;  
        case Sensor.TYPE_MAGNETIC_FIELD:  
        	Log.i("Seven", "magnetic field");
            break;  
          case Sensor.TYPE_ORIENTATION:  
        	Log.i("Seven", "orientation");
            break;  
        case Sensor.TYPE_PRESSURE:  
        	Log.i("Seven", "pressure");
            break;  
        case Sensor.TYPE_PROXIMITY:  
        	Log.i("Seven", "proximity");
            break;  
        case Sensor.TYPE_ROTATION_VECTOR:  
        	Log.i("Seven", "ROTATION");
            break;  
        case Sensor.TYPE_TEMPERATURE: 
        	Log.i("Seven", "temperature");
            break;  
        default:  
        	Log.i("Seven", "Unknown");
            break;  
        }  
      }
	}
}