android---利用反射实现的屏幕录制技术

ScreenShotService.java

package com.screenshot.ui;


import android.annotation.SuppressLint;
import android.app.Service;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Environment;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.view.View;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;


public class ScreenShotService extends Service {
	public static final boolean SSS_DEFAULT_START = false;
	public static final boolean SSS_START = true;
	public static final boolean SSS_STOP = false;
	public static final String TRANSCRIBE_TAG = "TRANSCRIBE_TAG";
	public static final long SSS_DELAY_MILLIS = 100L;
	public static final String SSS_FILE_PATH = "/luzhi/";
	public static final int SSS_MSG_WHAT = 256;
	private ScreenShotServiceHandler handler;
	private boolean isStart = SSS_STOP;


	private View[] getWindowDecorViews() throws Exception {
		Class<?> windowManager = Class
				.forName("android.view.WindowManagerImpl");
		Field viewsField = windowManager.getDeclaredField("mViews");
		Field instanceField = windowManager.getDeclaredField("mWindowManager");
		viewsField.setAccessible(true);
		instanceField.setAccessible(true);
		Object instance = instanceField.get(null);
		View[] viewarray = (View[]) viewsField.get(instance);


		if ((viewarray == null) || (viewarray.length < 0)) {
			return null;
		}
		int i = 0;
		View[] views = new View[viewarray.length];
		for (View v : viewarray) {
			views[i++] = v;
		}


		int[] arrayOfInt = new int[2];
		View localView;
		int j = 0;
		int length = views.length;
		for (i = 0; i < length; i++) {
			localView = views[i];
			localView.getLocationOnScreen(arrayOfInt);
			if ((arrayOfInt[0] > 0) || (arrayOfInt[1] > 0)) {
				for (j = i + 1; j < views.length; j++) {
					views[j - 1] = views[j];
				}
				views[views.length - 1] = localView;
				length--;
				i--;
			}
		}
		return views;
	}


	private void savePic(Bitmap paramBitmap, String paramString) {
		FileOutputStream fos = null;
		try {
			fos = new FileOutputStream(paramString);
			if (null != fos) {
				paramBitmap.compress(Bitmap.CompressFormat.PNG, 90, fos);
				fos.flush();
				fos.close();
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}


	private void screenShot() {
		try {
			View[] arrayOfView = getWindowDecorViews();
			Bitmap localBitmap = view2Bitmap(arrayOfView);
			new saveFileThread(localBitmap).start();
		} catch (Exception localException) {
			localException.printStackTrace();
		}
	}


	private Bitmap view2Bitmap(View paramView) {
		Log.e("saveFileThread view2Bitmap(View view)");
		paramView.setDrawingCacheEnabled(true);
		paramView.buildDrawingCache();
		Bitmap localBitmap1 = paramView.getDrawingCache();
		Bitmap localBitmap2 = null;
		if (localBitmap1 != null) {
			localBitmap2 = Bitmap.createBitmap(localBitmap1);
		}
		paramView.destroyDrawingCache();
		return localBitmap2;
	}


	private Bitmap view2Bitmap(View[] paramArrayOfView) {
		Canvas localCanvas = null;
		Paint localPaint = null;
		Bitmap newbitmap = null;
		int[] arrayOfInt = new int[2];


		for (View localView : paramArrayOfView) {
			Bitmap localBitmap = view2Bitmap(localView);
			localView.getLocationOnScreen(arrayOfInt);
			if (localBitmap != null) {
				if (localCanvas == null) {
					newbitmap = Bitmap.createBitmap(localView.getWidth(),
							localView.getHeight(), Config.ARGB_8888);// 创建一个新的和SRC
					localCanvas = new Canvas(newbitmap);
					localPaint = new Paint();
				}
				localCanvas.drawBitmap(localBitmap, arrayOfInt[0],
						arrayOfInt[1], localPaint);
				localBitmap.recycle();
				localBitmap = null;
			}
		}
		if (localCanvas != null) {
			localCanvas.save(Canvas.ALL_SAVE_FLAG);// 保存
			localCanvas.restore();// 存储
		}
		return newbitmap;
	}


	public IBinder onBind(Intent paramIntent) {
		return null;
	}


	public void onCreate() {
		super.onCreate();
		Log.e("ScreenShotService onCreate");
		handler = new ScreenShotServiceHandler();
	}


	public void onStart(Intent paramIntent, int paramInt) {
		super.onStart(paramIntent, paramInt);
		Log.e("ScreenShotService onStart -----start----");
		String str = TRANSCRIBE_TAG;
		boolean localstart = paramIntent
				.getBooleanExtra(str, SSS_DEFAULT_START);
		if (this.isStart != localstart) {
			this.isStart = localstart;
			if (this.isStart == SSS_START) {
				handler.sendEmptyMessageDelayed(SSS_MSG_WHAT, SSS_DELAY_MILLIS);
			} else {
				handler.removeMessages(SSS_MSG_WHAT);
			}
		}
	}


	@SuppressLint({ "HandlerLeak", "HandlerLeak" })
	private class ScreenShotServiceHandler extends Handler {
		public void handleMessage(Message paramMessage) {
			if (paramMessage.what == SSS_MSG_WHAT) {
				ScreenShotService.this.screenShot();
				if (ScreenShotService.this.isStart) {
					ScreenShotService.this.handler.sendEmptyMessageDelayed(
							SSS_MSG_WHAT, SSS_DELAY_MILLIS);
				}
			}
		}
	}


	private class saveFileThread extends Thread {
		private Bitmap mbitmap;


		public saveFileThread(Bitmap arg2) {
			this.mbitmap = arg2;
		}


		public void run() {
			if (this.mbitmap == null) {
				Log.e("saveFileThread run mbitmap is null ");
			}
			File localFile1 = Environment.getExternalStorageDirectory();
			File localFile2 = new File(localFile1, SSS_FILE_PATH);
			if (!localFile2.exists()) {
				localFile2.mkdirs();
			}
			String filename = localFile2.getAbsolutePath() + "/"
					+ System.currentTimeMillis() + ".png";
			Log.e("saveFileThread run picPath = " + filename);
			ScreenShotService.this.savePic(mbitmap, filename);
			this.mbitmap.recycle();
			this.mbitmap = null;
		}
	}
}

PlayActivity.java

package com.screenshot.ui;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageView;
import java.io.File;
import java.util.Arrays;
import java.util.Comparator;

import com.screenshot.R;

public class PlayActivity extends Activity {
	private PlayActivityHandler mHandler;
	private ImageView play_iv;
	private File[] arrayOfFile2;

	private File[] getFileList() {
		File localFile1 = Environment.getExternalStorageDirectory();
		File localFile2 = new File(localFile1, ScreenShotService.SSS_FILE_PATH);
		File[] arrayOfFile;
		if (!localFile2.exists()) {
			return null;
		}
		arrayOfFile = localFile2.listFiles();
		Arrays.sort(arrayOfFile, new Comparator<File>() {

			@Override
			public int compare(File paramFile1, File paramFile2) {
				long file1name = Long.valueOf(getFileNameNoEx(paramFile1
						.getName()));
				long file2name = Long.valueOf(getFileNameNoEx(paramFile2
						.getName()));
				return (int) (file1name - file2name);
			}

		});
		return arrayOfFile;
	}

	private void play() {
		arrayOfFile2 = getFileList();
		mHandler.setCount(0);
		mHandler.sendEmptyMessageDelayed(ScreenShotService.SSS_MSG_WHAT,
				ScreenShotService.SSS_DELAY_MILLIS);
	}

	public String getExtensionName(String paramString) {
		if ((paramString != null) && (paramString.length() > 0)) {
			int i = paramString.lastIndexOf('.');
			if (i > -1) {
				int j = paramString.length() + -1;
				if (i < j) {
					int k = i + 1;
					paramString = paramString.substring(k);
				}
			}
		}
		return paramString;
	}

	public String getFileNameNoEx(String paramString) {
		if ((paramString != null) && (paramString.length() > 0)) {
			int i = paramString.lastIndexOf('.');
			if (i > -1) {
				int j = paramString.length();
				if (i < j)
					paramString = paramString.substring(0, i);
			}
		}
		return paramString;
	}

	protected void onCreate(Bundle paramBundle) {
		super.onCreate(paramBundle);
		// 设置无标题
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		// 设置全屏
		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
				WindowManager.LayoutParams.FLAG_FULLSCREEN);

		setContentView(R.layout.play);
		this.play_iv = (ImageView) findViewById(R.id.play_iv);
		mHandler = new PlayActivityHandler();
		play();
	}

	private class PlayActivityHandler extends Handler {
		private int count = 0;
		//private Bitmap localBitmap;
		public void setCount(int vaule) {
			count = vaule;
		}

		@Override
		public void handleMessage(Message msg) {
			if (arrayOfFile2 != null && count < arrayOfFile2.length) {				
				Bitmap localBitmap = BitmapFactory
						.decodeFile(arrayOfFile2[count++].getAbsolutePath());
				play_iv.setImageBitmap(localBitmap);
				mHandler.sendEmptyMessageDelayed(
						ScreenShotService.SSS_MSG_WHAT,
						ScreenShotService.SSS_DELAY_MILLIS);				
			}
		}

	}
}