//行的高度。
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
   NewNotificationCell *cell = (NewNotificationCell *)[self tableView:tableView cellForRowAtIndexPath:indexPath];
    cell.myLabel.text = [self.dataArray objectAtIndex:indexPath.row];
    labelSize = [cell.myLabel.text sizeWithFont:[UIFont fontWithName:@"Arial" size:15] constrainedToSize:CGSizeMake(cell.myLabel.frame.size.width, 1000) lineBreakMode:UILineBreakModeWordWrap];
    cell.myLabel.lineBreakMode = UILineBreakModeWordWrap;
    cell.myLabel.numberOfLines = 0;
    [cell.myLabel setFont:[UIFont fontWithName:@"Arial" size:15]];
    cell.myLabel.frame = CGRectMake(0, 0, labelSize.width, labelSize.height);
   

    return labelSize.height+30;
   
}
//显示每行的内容。
- (NewNotificationCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    NewNotificationCell*cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (!cell) {
        cell=[[[NewNotificationCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]autorelease];
        cell = [[[NSBundle mainBundle]loadNibNamed:@"NewNotificationCell" owner:self options:nil]objectAtIndex:0];
       
    }
    //自动换行。
    cell.myLabel.text = [self.dataArray objectAtIndex:indexPath.row];
    labelSize = [cell.myLabel.text sizeWithFont:[UIFont fontWithName:@"Arial" size:15] constrainedToSize:CGSizeMake(cell.myLabel.frame.size.width, 1000) lineBreakMode:UILineBreakModeWordWrap];
    cell.myLabel.lineBreakMode = UILineBreakModeWordWrap;
    cell.myLabel.numberOfLines = 0;
    [cell.myLabel setFont:[UIFont fontWithName:@"Arial" size:15]];
    cell.myLabel.frame = CGRectMake(0, 0, labelSize.width, labelSize.height);
   
    //获取文字长度和高度。
    CGSize fontSize =[cell.myLabel.text sizeWithFont:cell.myLabel.font
                                    forWidth:cell.myLabel.frame.size.width
                               lineBreakMode:UILineBreakModeWordWrap];
    NSLog(@"文字长度=%f",fontSize.width);
   
    //获取UILabel上最后一个字符串的位置。
    CGPoint lastPoint;
    CGSize sz = [cell.myLabel.text sizeWithFont:cell.myLabel.font constrainedToSize:CGSizeMake(MAXFLOAT, 40)];
   
    CGSize linesSz = [cell.myLabel.text sizeWithFont:cell.myLabel.font constrainedToSize:CGSizeMake(cell.myLabel.frame.size.width, MAXFLOAT) lineBreakMode:UILineBreakModeWordWrap];
    if(sz.width <= linesSz.width) //判断是否折行 
    { 
        lastPoint = CGPointMake(cell.myLabel.frame.origin.x + sz.width, cell.myLabel.frame.origin.y);   
    }
    else
    {
        lastPoint = CGPointMake(cell.myLabel.frame.origin.x + (int)sz.width % (int)linesSz.width,linesSz.height - sz.height);
    }
    NSLog(@"====%f",lastPoint.x);
   
   
    [cell.myButton setTitle:@"查看" forState:UIControlStateNormal];
    [cell.myButton setBackgroundImage:[UIImage imageNamed:@"button.png"] forState:UIControlStateNormal];
    if ([cell.myButton.titleLabel.text isEqualToString:@"查看"]) {
        cell.myButton.frame = CGRectMake(lastPoint.x+5, labelSize.height-19, 30, 20);
    }
    [cell.timeButton setTitle:@"今天" forState:UIControlStateNormal];
    cell.timeButton.frame = CGRectMake(260, labelSize.height+8, 50, 20);
    return cell;
}

类似QQ浏览器滑动

public class  test extends Activity implements OnClickListener, SensorEventListener {
private SensorManager mSensorManager;
              @Override
	protected void onCreate(Bundle savedInstanceState) {
		//..............
	}
      }
       @Override
	public void onAccuracyChanged(Sensor sensor, int accuracy) {
		// TODO Auto-generated method stub

	}


	private float[] temp;

	@Override
	public void onSensorChanged(SensorEvent event) {
		if(PublicUtil.isWallPaperLocked(this))return; //屏幕如果锁定
		if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
				if (temp!=null&&isShake(event.values)) {
					if (!isShaking) {
						isShaking = true;
						Timer timer = new Timer();
						TimerTask task = new TimerTask() {

							@Override
							public void run() {
								// TODO Auto-generated method stub
								getData();
							}
						};
						timer.schedule(task, 1000);//延迟一秒执行
					}
				}
				temp = event.values.clone();//克隆传感器里的values的值
			}
	}

	boolean isShake(float[] values){
		boolean flag = false;
		for (int i = 0; i < values.length; i++) {
			if(temp[i]-values[i]>15){ //如果摇动的力度大于15 就执行摇一摇
				System.out.println("temp="+temp[i]+"value="+values[i]);
				flag = true;
				break;
			}
		}
		return flag;
	}
     @Override
	protected void onResume() {
		super.onResume();
		StatService.onResume(this);
		// 加速度传感器
		mSensorManager.registerListener(this,
				mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
				// 还有SENSOR_DELAY_UI、SENSOR_DELAY_FASTEST、SENSOR_DELAY_GAME等，
				// 根据不同应用，需要的反应速率不同，具体根据实际情况设定
				SensorManager.SENSOR_DELAY_NORMAL);
	}

	@Override
	protected void onPause() {
		// TODO Auto-generated method stub
		super.onPause();
		StatService.onPause(this);
		mSensorManager.unregisterListener(this);
	}

	@Override
	protected void onStop() {
		// TODO Auto-generated method stub
		super.onStop();
		// this.unRegisterLocationListener();
		mSensorManager.unregisterListener(this);
	}

从这个示例，我们可以基本总结出使用Android传感器的步骤，注册一个SensorEventListener，然后在onSensorChanged方法中处理传感器的数据。

这里需要注意的一点是，我把注册Sensor这个过程放在了onResume()方法中，而取消注册放在了onPause()方法中，这主要是因为，传感器的使用太耗电了，而且一定需要手动取消注册，否则即使Activity不可见，传感器依然在工作中，几个小时内就会耗光电量。

更多传感器的知识参考

http://aliusa.iteye.com/blog/1064560