代码下载：http://download.youkuaiyun.com/detail/harrycris/5601879 /* * * */ @SuppressLint("DefaultLocale") public class MainActivity extends Activity implements OnClickListener { private final i

ImageView的属性android:scaleType，即ImageView.setScaleType(ImageView.ScaleType)值的意义区别： CENTER /center 按图片的原来size居中显示，当图片长/宽超过View的长/宽，则截取图片的居中部分显示   CENTER_CROP / centerCrop 按比例扩大图片的size居中显示，使得图片长(宽)等于或

ConnectivityManager connectivityManager; NetworkInfo info; connectivityManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE); info = connectivityManager.getActiveNetworkIn

android:priority service接收广播的优先级，级别越高（数值越大）越先接收到广播，取值范围[-1000,1000]，例如：

public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,float velocityY) ; e1： The first down motion event that started the fling.手势起点的移动事件 e2： The move motion event that triggered th