Android Open Source - screenstandby H U D Native

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License

The source code is released under:

GNU General Public License

Java Source Code

/*******************************************************************************
 * Copyright (c) 2014 Hoang Nguyen./*from  w  w  w .ja  va 2 s .  com*/
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v2.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * 
 * Contributors:
 *     Hoang Nguyen - initial API and implementation
 ******************************************************************************/
package com.nkahoang.screenstandby;

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.AssetManager;
import android.os.Build;
import android.util.Log;
import android.view.Display;
import android.view.Surface;
import android.view.WindowManager;

public class HUDNative {

private final static String executable_file = "screenstandby";

public static void injectMouseEvent(int down, int x, int y)
{
  if (_bInitialized)
  try {
    os.writeBytes(x + " " + y + " " + down + "\n");
      os.flush();
  } catch (IOException e) {
    Logger.Log(_context, e);
  }
}

public static void injectKeyEvent(int down, int key)
{
  if (_bInitialized)
  try {
    os.writeBytes(key + " " + key + " " + down + "\n");
      os.flush();
  } catch (IOException e) {
    Logger.Log(_context, e);
  }
}

public static void destroy()
{
  if (_bInitialized) {
    try
    {
      injectMouseEvent(0,0,0);
      injectMouseEvent(5,0,0);
    }
    catch(Exception e)
    {
      Logger.Log(_context, e);
    }
    try
    {
      _bInitialized = false;
      dpProc.destroy();
      dpProc = null;
      Logger.Log(_context, "HUD driver destroyed");
    }
    catch(Exception e)
    {
      Logger.Log(_context, e);
    }
  }
}

static Process dpProc;
static Context _context;
static DataOutputStream os;
static boolean _bInitialized = false;

public static boolean IsInitialized()
{
  return _bInitialized;
}
private final static int[] screenRes = {480, 540, 720, 800, 960, 1080, 1280, 1920};
public static int NormaliseValue(int res)
{
  int value = res;
  for (int r: screenRes)
  {
    if ((r == res)) return r;
    else if ((res < r) && (Math.abs(res - r) <= 48)) value = r;
  }
  return value;
}
@TargetApi(Build.VERSION_CODES.FROYO)
public static void initialize(Context context)
{
  _context = context;
  copyFileOrDir(executable_file, context);
  Display display = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
  Logger.Log(context, "HUD driver initialised: " + NormaliseValue((display.getRotation() == Surface.ROTATION_0)?display.getWidth():display.getHeight()) + " " + NormaliseValue((display.getRotation() == Surface.ROTATION_0)?display.getHeight():display.getWidth()));
  try {
    dpProc = Runtime.getRuntime().exec("su");
      os = new DataOutputStream(dpProc.getOutputStream());
      String nativePath = "/data/data/" + context.getPackageName() + "/" + executable_file;
      os.writeBytes("chmod 755 " + nativePath + "\n");
      os.writeBytes(nativePath + " " + NormaliseValue((display.getRotation() == Surface.ROTATION_0)?display.getWidth():display.getHeight()) + " " + NormaliseValue((display.getRotation() == Surface.ROTATION_0)?display.getHeight():display.getWidth()) + "\n");
      os.flush();
      _bInitialized = true;
  } catch (Exception e) {
    _bInitialized = false;
  }
}

private static void copyFileOrDir(String path, Context context) {
    try {
        AssetManager assetManager = context.getAssets();
        String assets[] = null;
        assets = assetManager.list(path);
        if (assets.length == 0) {
            copyFile(path,context);
        } else {
            String fullPath = "/data/data/" + context.getPackageName() + "/" + path;
            File dir = new File(fullPath);
            if (!dir.exists())
                dir.mkdir();
            for (int i = 0; i < assets.length; ++i) {
                copyFileOrDir(path + "/" + assets[i],context);
            }
        }
    } catch (IOException ex) {
        Log.e("tag", "I/O Exception", ex);
    }
}

private static void copyFile(String filename, Context context) {
      AssetManager assetManager = context.getAssets();
  
      InputStream in = null;
      OutputStream out = null;
      try {
          in = assetManager.open(filename);
          String newFileName = "/data/data/" + context.getPackageName() + "/" + filename;
          out = new FileOutputStream(newFileName);
  
          byte[] buffer = new byte[1024];
          int read;
          while ((read = in.read(buffer)) != -1) {
              out.write(buffer, 0, read);
          }
          in.close();
          in = null;
          out.flush();
          out.close();
          out = null;
      } catch (Exception e) {
          Log.e("tag", e.getMessage());
      }
  }
}

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