来源: 互联网  发布时间: 2014-02-18

ubuntu下设置ip和dns
1 设置静态IP

修改/etc/network/interfaces文件

保持之前的关于 lo的内容不变，即以下两行
auto lo
iface lo inet loopback

并添加
auto ech0
iface eth0 inet static
address 192.168.3.90
gateway 192.168.3.1
netmask 255.255.255.0



2 配置DNS

修改/etc/resolv.conf文件.

nameserver 192.168.3.2
nameserver 192.168.23.22

在ubuntu10.04中没有resolv.conf文件，需要自己添加。

    

    来源: 互联网  发布时间: 2014-02-18

使用百度地图画轨迹
百度地图画轨迹连接线。

package com.life.hua.activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Path;
import android.graphics.Point;
import android.os.Bundle;
import com.baidu.mapapi.BMapManager;
import com.baidu.mapapi.GeoPoint;
import com.baidu.mapapi.MapActivity;
import com.baidu.mapapi.MapController;
import com.baidu.mapapi.MapView;
import com.baidu.mapapi.Overlay;
import com.baidu.mapapi.Projection;
import com.life.hua.activity.BaseApplication;
import com.life.hua.activity.R;

public class BaiduMapActivity extends MapActivity {
	private Context mContext;
	private MapView mapView;
	@Override
	protected boolean isRouteDisplayed() {
		// TODO Auto-generated method stub
		return false;
	}
	private GeoPoint gpoint1, gpoint2, gpoint3;// 连线的点
	@Override
	protected void onCreate(Bundle arg0) {
		super.onCreate(arg0);
		setContentView(R.layout.baidumap_layout);

		BaseApplication baseApp = (BaseApplication) this.getApplication();
		if (baseApp.mBMapManage == null) {
			baseApp.mBMapManage = new BMapManager(mContext);
			baseApp.mBMapManage.init(baseApp.mStrKey,
					new BaseApplication.MyGeneralListener());
		}
		baseApp.mBMapManage.start();
		super.initMapActivity(baseApp.mBMapManage);// 初始化map sdk
		mapView = (MapView) findViewById(R.id.bmapView);
		mapView.setBuiltInZoomControls(true);
		// 设置在缩放动画过程中也显示overlay,默认为不绘制
		mapView.setDrawOverlayWhenZooming(true);

		// RouteLine routeLine =
		// (RouteLine)getIntent().getSerializableExtra("routeLine");

		//这里画点和连接线
		MyOverlay myOverlay = new MyOverlay();
		mapView.getOverlays().add(myOverlay);
		
		MapController mapController = mapView.getController();
		mapController.zoomIn();
		
		gpoint1 = new GeoPoint((int) (2259316 * 10),
				(int) (11396279 * 10));
		gpoint2 = new GeoPoint((int) (2259245 * 10),
				(int) (11396226 * 10));
		gpoint3 = new GeoPoint((int) (2259121 * 10),
				(int) (11396066 * 10));		
		mapController.animateTo(gpoint1);//设置一个起点
	}

	class MyOverlay extends Overlay {

		@Override
		public void draw(Canvas canvas, MapView mapView, boolean shadow) {
			super.draw(canvas, mapView, shadow);
			
			Projection projection = mapView.getProjection();
			Point p1 = new Point();
			Point p2 = new Point();
			Point p3 = new Point();
			// 经度转像素
			projection.toPixels(gpoint1, p1);
			projection.toPixels(gpoint2, p2);
			projection.toPixels(gpoint3, p3);
		
			//第一个画笔 画圆
			Paint fillPaint = new Paint();
			fillPaint.setColor(Color.BLUE);
			fillPaint.setAntiAlias(true);
			fillPaint.setStyle(Style.FILL);
			
			// 将图画到上层
			canvas.drawCircle(p1.x, p1.y, 5.0f, fillPaint);
			canvas.drawCircle(p2.x, p2.y, 5.0f, fillPaint);
			canvas.drawCircle(p3.x, p3.y, 5.0f, fillPaint);

			//第二个画笔 画线
			Paint paint = new Paint();
			paint.setColor(Color.BLUE);
			paint.setDither(true);
			paint.setStyle(Paint.Style.STROKE);
			paint.setStrokeJoin(Paint.Join.ROUND);
			paint.setStrokeCap(Paint.Cap.ROUND);
			paint.setStrokeWidth(4);

			//连接
			Path path = new Path();
			path.moveTo(p1.x, p1.y);
			path.lineTo(p2.x, p2.y);
			path.lineTo(p3.x, p3.y);
			//画出路径
			canvas.drawPath(path, paint);
		}
	}

}

    

    来源: 互联网  发布时间: 2014-02-18

给界面上任何控件截图并保存为PNG的方法

    UIView *view = [[[[[UIApplication sharedApplication] windows] objectAtIndex:1] subviews] lastObject];//获得某个window的某个subView
 
    NSInteger index = 0;//用来给保存的png命名
    for (UIView *subView in [view subviews]) {//遍历这个view的subViews
        if ([subView isKindOfClass:NSClassFromString(@"UIImageView")] || [subView isKindOfClass:NSClassFromString(@"UIThreePartButton")]) {//找到自己需要的subView
            //支持retina高分的关键
            if(UIGraphicsBeginImageContextWithOptions != NULL)
            {
                UIGraphicsBeginImageContextWithOptions(subView.frame.size, NO, 0.0);
            } else {
                UIGraphicsBeginImageContext(subView.frame.size);
            }            
 
            //获取图像
            [subView.layer renderInContext:UIGraphicsGetCurrentContext()];
            UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
            UIGraphicsEndImageContext();
 
            //保存图像
            NSString *path = [NSHomeDirectory() stringByAppendingFormat:@"/%d.png",index];
            if ([UIImagePNGRepresentation(image) writeToFile:path atomically:YES]) {
                index += 1;
                NSLog(@"Succeeded!");
            }
            else {
                NSLog(@"Failed!");
            }
        }
    }