Android Open Source - Aviary-Android-SDK Vibration Helper

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License

The source code is released under:

AVIARY API TERMS OF USE Full Legal Agreement The following terms and conditions and the terms and conditions at http://www.aviary.com/terms (collectively, the ?Terms??) govern your use of any and ...

Java Source Code

package com.aviary.android.feather.widget;
/* w ww.  j av  a2s  . c o  m*/
import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.os.Vibrator;
import android.util.Log;

import com.aviary.android.feather.common.log.LoggerFactory;

public class VibrationHelper {

  private static final String LOG_TAG = "VibrationHelper";

  private static final int MSG_VIBRATE = 101;

  private boolean mEnabled;
  private static Vibrator mVibrator;
  private VibrationHandler mHandler = new VibrationHandler();

  public VibrationHelper ( Context context, boolean enabled ) {
    initialize( context );
    setEnabled( enabled );

    if ( !isAvailable() ) {
      setEnabled( false );
    }
  }

  /**
   * Returns if the vibration is currently available on
   * the current device
   * 
   * @return
   */
  public boolean isAvailable() {
    if ( null != mVibrator ) {
      if ( android.os.Build.VERSION.SDK_INT >= 11 ) {
        return mVibrator.hasVibrator();
      } else {
        return true;
      }
    }
    return false;
  }

  private void initialize( Context context ) {
    synchronized ( VibrationHelper.class ) {
      if ( null == mVibrator ) {
        try {
          mVibrator = (Vibrator) context.getSystemService( Context.VIBRATOR_SERVICE );
        } catch ( Exception e ) {
          Log.e( LOG_TAG, e.toString() );
        }
      }
    }
  }

  public void setEnabled( boolean value ) {
    if ( LoggerFactory.LOG_ENABLED ) {
      Log.i( LOG_TAG, "setEnabled: " + value );
    }
    mEnabled = value && ( mVibrator != null );
  }

  public boolean enabled() {
    return mEnabled;
  }

  public void vibrate( int milliseconds ) {
    if ( mEnabled ) {
      if ( null != mHandler ) {
        mHandler.removeMessages( MSG_VIBRATE );

        Message msg = mHandler.obtainMessage( MSG_VIBRATE );
        msg.arg1 = milliseconds;

        mHandler.sendMessage( msg );
      }
    }
  }

  static class VibrationHandler extends Handler {

    @Override
    public void handleMessage( Message msg ) {
      switch ( msg.what ) {
        case MSG_VIBRATE:
          if ( mVibrator != null ) {
            try {
              mVibrator.vibrate( msg.arg1 );
            } catch ( Throwable t ) {
              if ( LoggerFactory.LOG_ENABLED ) {
                t.printStackTrace();
              }
            }
          }
      }
    }
  }
}

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