来源: 互联网  发布时间: 2014-02-18

mac快捷键小结
Command-Shift-3: 将整个屏幕拍下并保存到桌面。
Command-Shift-Control-3:将整个屏幕拍下并保存到剪贴板，你可以Command+V直接粘贴到如Photoshop等软件中编辑。
Command-Shift-4:将屏幕的一部分拍下并保存到桌面。按下这个组合键后，光标会变为一个十字，可以拖拉来选取拍摄区域。
Command-Shift-Control-4:将屏幕的一部分拍下并保存到剪贴板。
Command-Shift-4再按空格键:这时光标会变为一个照相机图标，点击可拍下当前窗口或菜单或Dock以及图标等，只要将照相机图标移动到不同区域（有效区域会显示为浅蓝色）点击。
Command-Shift-Control-4再按空格键:将选取的窗口或其他区域的快照保存到剪贴板

正在慢慢收集中......

    

    来源: 互联网  发布时间: 2014-02-18

获取和判断正在运行的服务
void getTask() {

ActivityManager activityManager;
try {
activityManager = (ActivityManager) this
.getSystemService(ACTIVITY_SERVICE);

arylistTask =
new ArrayList<String>();



List<ActivityManager.RunningTaskInfo> mRunningTasks =

activityManager.getRunningTasks(30); //30表示获取的最大数

/* 以循环及baseActivity方式取得任务名称与ID */
for (RunningTaskInfo amTask : mRunningTasks)
{
Log.d("TaskInfo", amTask.baseActivity.getClassName()+"("+amTask.id+")");
}

//获取服务
List<RunningServiceInfo> mserviceTasks =

activityManager.getRunningServices(30);
/* 以循环方式取得任务名称与ID */
for (RunningServiceInfo serinfo : mserviceTasks)
{
Log.d("TaskServerInfo", serinfo.process+"("+serinfo.pid+")");
}
}

catch (Exception e)

{



}

--------------String serviceinfo;
String serviceClassName;//需要判断服务的名称

ActivityManager am=(ActivityManager)this.getSystemService(ACTIVITY_SERVICE);


//获取后台运行的服务，参数50代表获取的最大数，可以自定义

List<RunningServiceInfo> runninglist = am.getRunningServices(50);



//将获取到的服务名称赋值给字符串serviceinfo

for(RunningServiceInfo info :runninglist){

serviceinfo+=info.service.getClassName()+"...\n";

}

//for (int i = 0; i < runninglist.size(); i++) {
//   serviceinfo+=list.get(i).service.getClassName()+"...\n";
//  }

//判断服务是否运行
for(int i=0;i<runninglist.size();i++){

if(serviceClassName.equals(runninglist.get(i).service.getClassName())){

//serviceClassName服务正在运行

...

}

}
--------------
import java.util.Iterator; import java.util.List; import android.app.Activity; import android.app.ActivityManager; import android.app.ActivityManager.RunningServiceInfo; import android.app.Service; imp
Android获取正在运行的服务，如下代码：

import java.util.Iterator;   import java.util.List;      import android.app.Activity;   import android.app.ActivityManager;   import android.app.ActivityManager.RunningServiceInfo;   import android.app.Service;   import android.content.ComponentName;   import android.content.Context;   import android.os.Bundle;      public class getRunningServicesInfo extends Activity {       /** Called when the activity is first created. */       @Override       public void onCreate(Bundle savedInstanceState) {           super.onCreate(savedInstanceState);           setContentView(R.layout.main);           getRunningServicesInfo(this);       }       //RunningServicesInfo        public static String getRunningServicesInfo(Context context) {                        StringBuffer serviceInfo = new StringBuffer();                        final ActivityManager activityManager = (ActivityManager) context                                        .getSystemService(Context.ACTIVITY_SERVICE);                        List<RunningServiceInfo> services = activityManager.getRunningServices(100);                           Iterator<RunningServiceInfo> l = services.iterator();                        while (l.hasNext()) {                                RunningServiceInfo si = (RunningServiceInfo) l.next();                                serviceInfo.append("pid: ").append(si.pid);                                serviceInfo.append("\nprocess: ").append(si.process);                                serviceInfo.append("\nservice: ").append(si.service);                                serviceInfo.append("\ncrashCount: ").append(si.crashCount);                                serviceInfo.append("\nclientCount: ").append
(si.clientCount);                                serviceInfo.append("\nactiveSince: ").append(si.activeSince);                                serviceInfo.append("\nlastActivityTime: ").append(si.lastActivityTime);                                serviceInfo.append("\n\n");                        }                        System.out.println(serviceInfo.toString());                       return serviceInfo.toString();        }    } 

-----------http://hbczzsw.iteye.com/blog/746177

    

    来源: 互联网  发布时间: 2014-02-18

View实现涂鸦、撤销以及重做功能
eoe上既然看见了，就备份一下，少许更改了部分代码：

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Bitmap.CompressFormat;
import android.os.Environment;
import android.view.MotionEvent;
import android.view.View;

/**
 * View实现涂鸦、撤销以及重做功能
 */

public class TuyaView extends View {

	private Bitmap mBitmap;
	private Canvas mCanvas;
	private Path mPath;
	private Paint mBitmapPaint;// 画布的画笔
	private Paint mPaint;// 真实的画笔
	private float mX, mY;// 临时点坐标
	private static final float TOUCH_TOLERANCE = 4;
	
	// 保存Path路径的集合,用List集合来模拟栈
	private static List<DrawPath> savePath;
	// 记录Path路径的对象
	private DrawPath dp;

	private int screenWidth, screenHeight;

	private class DrawPath {
		public Path path;// 路径
		public Paint paint;// 画笔
	}

	public TuyaView(Context context, int w, int h) {
		super(context);
		screenWidth = w;
		screenHeight = h;

		mBitmap = Bitmap.createBitmap(screenWidth, screenHeight, Bitmap.Config.ARGB_8888);
		// 保存一次一次绘制出来的图形
		mCanvas = new Canvas(mBitmap);

		mBitmapPaint = new Paint(Paint.DITHER_FLAG);
		mPaint = new Paint();
		mPaint.setAntiAlias(true);
		mPaint.setStyle(Paint.Style.STROKE);
		mPaint.setStrokeJoin(Paint.Join.ROUND);// 设置外边缘
		mPaint.setStrokeCap(Paint.Cap.ROUND);// 形状
		mPaint.setStrokeWidth(5);// 画笔宽度

		savePath = new ArrayList<DrawPath>();
	}

	@Override
	public void onDraw(Canvas canvas) {
		canvas.drawColor(0xFFAAAAAA);
		// 将前面已经画过得显示出来
		canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
		if (mPath != null) {
			// 实时的显示
			canvas.drawPath(mPath, mPaint);
		}
	}

	private void touch_start(float x, float y) {
		mPath.moveTo(x, y);
		mX = x;
		mY = y;
	}

	private void touch_move(float x, float y) {
		float dx = Math.abs(x - mX);
		float dy = Math.abs(mY - y);
		if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
			// 从x1,y1到x2,y2画一条贝塞尔曲线，更平滑(直接用mPath.lineTo也是可以的)
			mPath.quadTo(mX, mY, (x + mX) / 2, (y + mY) / 2);
			mX = x;
			mY = y;
		}
	}

	private void touch_up() {
		mPath.lineTo(mX, mY);
		mCanvas.drawPath(mPath, mPaint);
		//将一条完整的路径保存下来(相当于入栈操作)
		savePath.add(dp);
		mPath = null;// 重新置空
	}
	/**
	 * 撤销的核心思想就是将画布清空，
	 * 将保存下来的Path路径最后一个移除掉，
	 * 重新将路径画在画布上面。
	 */
	public void undo() {
		if (savePath != null && savePath.size() > 0) {
			savePath.remove(savePath.size() - 1);
			redrawOnBitmap();
		}
	}
	/**
	 * 重做
	 */
	public void redo(){
		if (savePath != null && savePath.size() > 0) {
			savePath.clear();
			redrawOnBitmap();
		}
	}
	
	private void redrawOnBitmap(){
		mBitmap = Bitmap.createBitmap(screenWidth, screenHeight,
				Bitmap.Config.ARGB_8888);
		mCanvas.setBitmap(mBitmap);// 重新设置画布，相当于清空画布 
		Iterator<DrawPath> iter = savePath.iterator();
		while (iter.hasNext()) {
			DrawPath drawPath = iter.next();
			mCanvas.drawPath(drawPath.path, drawPath.paint);
		}
		invalidate();// 刷新
	}

	@Override
	public boolean onTouchEvent(MotionEvent event) {
		float x = event.getX();
		float y = event.getY();

		switch (event.getAction()) {
		case MotionEvent.ACTION_DOWN:
			// 每次down下去重新new一个Path
			mPath = new Path();
			//每一次记录的路径对象是不一样的
			dp = new DrawPath();
			dp.path = mPath;
			dp.paint = mPaint;
			touch_start(x, y);
			invalidate();
			break;
		case MotionEvent.ACTION_MOVE:
			touch_move(x, y);
			invalidate();
			break;
		case MotionEvent.ACTION_UP:
			touch_up();
			invalidate();
			break;
		}
		return true;
	}

	public void saveToSDCard(){
		String fileUrl = Environment.getExternalStorageDirectory()
				.toString() + "/android/data/test.png";
		try {
			FileOutputStream fos = new FileOutputStream(new File(fileUrl));
			mBitmap.compress(CompressFormat.PNG, 100, fos);
			fos.flush();
			fos.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

import android.app.Activity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.KeyEvent;

public class TuyaActivity extends Activity {

	private TuyaView tuyaView = null;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		DisplayMetrics dm = new DisplayMetrics();
		getWindowManager().getDefaultDisplay().getMetrics(dm);

		tuyaView = new TuyaView(this, dm.widthPixels, dm.heightPixels);
		setContentView(tuyaView);
	}

	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		if (keyCode == KeyEvent.KEYCODE_BACK) {// 返回键
			tuyaView.undo();
			return true;
		}else if(keyCode == KeyEvent.KEYCODE_MENU){//MENU
			tuyaView.redo();
			return true;
		}
		return super.onKeyDown(keyCode, event);
	}

}