仿淘宝"摇一摇"

前几天看到淘宝最新的客户端有一个弱网络情况数据加载超时，手持摇一摇即可手动刷新功能，觉得蛮有趣，便自己抽空实现了下，并增加了摇动时对话框抖动和声音的效果。

 

效果图如下：

 

 

 

 

 

  主要代码如下，具体代码可以参见附件：

 

/**
 * 摇一摇,尝试重新连接网络
 * @ClassName: ShakeDialog
 * @author 姜涛
 * @version 1.0 2012-2-2 上午10:26:09
 */
public class ShakeDialog extends AlertDialog implements OnClickListener,
		SensorEventListener {

	private View view;
	private Context mContext;
	private Button settingBtn, retryBtn, backBtn;

	private SensorManager mSensorManager;
	private long firstTime = 0, endTime = 0;
	private float x, last_x;
	private float y, last_y;
	private float z, last_z;
	private MediaPlayer mediaPlayer;

	private static final int CHECK_NET = 1;
	private static final long TIME = 1000;
	private final Handler handler = new Handler() {

		@Override
		public void handleMessage(Message msg) {
			switch (msg.what) {

			case CHECK_NET:

				if (NetUtils.checkNetwork(mContext)) {
					dismiss();
				} else {
					view.setVisibility(View.VISIBLE);
				}

				break;

			}
		}

	};

	public ShakeDialog(Context context) {
		super(context);
		this.mContext = context;
	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		view = getLayoutInflater().inflate(R.layout.connecterror_layout, null);
		setContentView(view);

		initUi();
		initView();
		addListener();
	}

	@Override
	protected void onStop() {
		if (mSensorManager != null)
			mSensorManager.unregisterListener(this);
		if (mediaPlayer != null)
			mediaPlayer.release();
		super.onStop();
	}

	private void initUi() {
		settingBtn = (Button) findViewById(R.id.setting);
		retryBtn = (Button) findViewById(R.id.retry);
		backBtn = (Button) findViewById(R.id.back);

		mSensorManager = (SensorManager) mContext
				.getSystemService(Context.SENSOR_SERVICE);
		mSensorManager.registerListener(this,
				mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
				SensorManager.SENSOR_DELAY_UI); // 注册加速度感应器
		mediaPlayer = new MediaPlayer();
	}

	private void initView() {
		try {
			AssetFileDescriptor fd = mContext.getResources().getAssets()
					.openFd("sound/shake_sound_male.mp3");
			mediaPlayer.setDataSource(fd.getFileDescriptor(),
					fd.getStartOffset(), fd.getLength());
			mediaPlayer.prepare();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	private void addListener() {
		settingBtn.setOnClickListener(this);
		retryBtn.setOnClickListener(this);
		backBtn.setOnClickListener(this);
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {

		case R.id.setting: // 设置网络

			Intent intent = new Intent(
					android.provider.Settings.ACTION_WIRELESS_SETTINGS);
			mContext.startActivity(intent);

			break;

		case R.id.retry: // 重试

			view.setVisibility(View.INVISIBLE);

			handler.sendEmptyMessageDelayed(CHECK_NET, TIME);

			break;

		case R.id.back: // 返回

			cancel();

			break;

		}
	}

	/**
	 * 传感器精确度变化时调用
	 */
	@Override
	public void onAccuracyChanged(Sensor sensor, int accuracy) {
		// TODO Auto-generated method stub

	}

	/**
	 * 传感器数据变化时调用
	 */
	@Override
	public void onSensorChanged(SensorEvent event) {

		int sensorType = event.sensor.getType();
		float[] values = event.values;

		if (sensorType == Sensor.TYPE_ACCELEROMETER) {

			firstTime = System.currentTimeMillis();
			if ((firstTime - endTime) > 100) {
				long betweenTime = firstTime - endTime;
				/**
				 * x方向就是手机的水平方向，右为正 　　
				 * y方向就是手机的水平垂直方向，前为正 　　
				 * y方向就是手机的空间垂直方向，天空的方向为正，地球的方向为负
				 */
				x = values[SensorManager.DATA_X];
				y = values[SensorManager.DATA_Y];
				z = values[SensorManager.DATA_Z];
				float speed = Math.abs(x + y + z - last_x - last_y - last_z)
						/ betweenTime * 10000;

				if (speed > 1000) {
					view.startAnimation(AnimationUtils.loadAnimation(mContext,
							R.anim.shake));

					mediaPlayer.start();

					handler.sendEmptyMessageDelayed(CHECK_NET, TIME);
				}
				last_x = x;
				last_y = y;
				last_z = z;
				endTime = System.currentTimeMillis();
			}

		}

	}

	static class NetUtils {

		/**
		 * 判断网络的连接情况
		 * 
		 * @param context
		 * @return
		 */
		public static boolean checkNetwork(Context context) {
			boolean result;
			ConnectivityManager manager = (ConnectivityManager) context
					.getSystemService(Context.CONNECTIVITY_SERVICE);
			NetworkInfo info = manager.getActiveNetworkInfo();
			if (manager == null || info == null || !info.isAvailable()
					|| !info.isConnected()) {
				result = false;
			} else {
				result = true;
			}
			return result;
		}
	}
}