Android中的几个System Service

核心提示：1.得到正在运行的Activity列表：ActivityManager activityManager = (ActivityManager)this.mActivity.getSystemService(Context.ACTIVITY_SERVICE);List mAllProcessList = activity

1.得到正在运行的Activity列表：ActivityManager activityManager = (ActivityManager)this.mActivity.getSystemService(Context.ACTIVITY_SERVICE);

List mAllProcessList = activityManager.getRunningAppProcesses();

2.得到手机的动作感应器

//取得SensorManager

SensorManager　sensorMgr　=　(SensorManager)getSystemService(SENSOR_SERVICE);

//返回true表示注册成功，flase则反之

sensorMgr.registerListene(this,SensorManager.SENSOR_ACCELEROMETER,SensorManager.SENSOR_DELAY_GAME);

sensorMgr.unregisterListener(this,SensorManager.SENSOR_ACCELEROMETER);

SensorListener必须实现两个方法：

public　void　onAccuracyChanged(int　arg0,　int　arg1)　{}

public　void　onSensorChanged(int　sensor,　float[]　values)　{}

class　Pos3D

{

float　x;

float　y;

float　z;

}

Pos3D　cur,last;

cur.x　=　values[SensorManager.DATA_X];

cur.y　=　values[SensorManager.DATA_Y];

cur.z　=　values[SensorManager.DATA_Z];

float　speed　=　Math.abs((cur.x+cur.y+cur.z)-(last.x+last.y+last.z)) //间隔的时间

这样可以得到手机的移动速度

原文：http://andynjux.blogbus.com/logs/67592403.html