结对项目——电子书ReadBook

该功能主要实现的有选择阅读模式（白天模式，夜晚模式，图片模式）和选择阅读进度，改变了退出方式。

public class ReadBook extends BaseActivity {

private BookManager bookManager;
private Book book;

private BookPageView mBookPageView;
private Bitmap mCurPageBitmap, mNextPageBitmap;
private Canvas mCurPageCanvas, mNextPageCanvas;
private BookPageFactory pagefactory;
long fileLenth = 1L;

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

	Display display = getWindowManager().getDefaultDisplay();
	int width = display.getWidth();
	int height = display.getHeight();
	
	
	mBookPageView = new BookPageView(this, width, height);
	setContentView(mBookPageView);

	mCurPageBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
	
	mNextPageBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);

	mCurPageCanvas = new Canvas(mCurPageBitmap);
	mNextPageCanvas = new Canvas(mNextPageBitmap);

	pagefactory = new BookPageFactory(this, width, height);

	try {
		
		bookManager = new BookManager(this);
		Long bookId = getIntent().getLongExtra("bookId", -1);
		if (bookId == -1) {
			ToastUtils.toast(this, "查询的id不存在");
			startActivity(new Intent(this, MyBook.class));
			return;
		}
		book = bookManager.get(bookId);
		// 读取图书
		fileLenth = pagefactory.openBook(book);
		
		pagefactory.onDraw(mCurPageCanvas);
	} catch (IOException e1) {
		ToastUtils.toast(this, "查询的电子书不存在");
		Log.e(TAG, e1.getMessage());
	}
	
	mBookPageView.setBitmaps(mCurPageBitmap, mCurPageBitmap);
	
	
	mBookPageView.setOnTouchListener(new OnTouchListener() {
		
		public boolean onTouch(View v, MotionEvent e) {
			boolean ret = false;
			if (v == mBookPageView) {
				if (e.getAction() == MotionEvent.ACTION_DOWN) {
					
					mBookPageView.abortAnimation();
					
					mBookPageView.calcCornerXY(e.getX(), e.getY());

					pagefactory.onDraw(mCurPageCanvas);
					if (mBookPageView.DragToRight()) {
						pagefactory.prePage();// 上一页
						
						if (pagefactory.isfirstPage()) {
							ToastUtils.toast(ReadBook.this, "首页");
							return false;
						}
						pagefactory.onDraw(mNextPageCanvas);
					} else {
						pagefactory.nextPage();// 下一页
						
						if (pagefactory.islastPage()) {
							ToastUtils.toast(ReadBook.this, "末页");
							return false;
						}
						pagefactory.onDraw(mNextPageCanvas);
					}
					
					mBookPageView.setBitmaps(mCurPageBitmap, mNextPageBitmap);
				}

				ret = mBookPageView.doTouchEvent(e);
				return ret;
			}
			return false;
		}

	});
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
	MenuInflater inflater = new MenuInflater(this);
	inflater.inflate(R.menu.read_book, menu);
	return super.onCreateOptionsMenu(menu);
}

// 处理选项菜单的点击事件
@Override
public boolean onOptionsItemSelected(MenuItem item) {
	switch (item.getItemId()) {
	case R.id.menu1:// 白天模式
		break;
	case R.id.menu2:// 夜晚模式
		break;
	case R.id.menu3:// 图片模式
		
		pagefactory.setBgBitmap(BitmapFactory.decodeResource(this.getResources(), R.drawable.bg2));
		
		
			case R.id.menu4:
		LayoutInflater layoutInflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
		LinearLayout myLayout = (LinearLayout) layoutInflater.inflate(R.layout.read_book_progress, null);
		prog_int = (EditText) myLayout.findViewById(R.id.prog_int);
		prog_float = (EditText) myLayout.findViewById(R.id.prog_float);
		seekBar = (SeekBar) myLayout.findViewById(R.id.seekBar);
		// 添加事件监听
		seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
			
			public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
				prog_int.setText(progress + "");
				if (progress == 100) {
					prog_float.setText("0");
				} else {
					double putvalue = progress * 0.01;
					DecimalFormat df = new DecimalFormat("#0.00");
					double fp = new Double(df.format(putvalue));
					// 小数点后两位前移，并四舍五入
					int j = (int) Math.round(fp * 100);
					prog_float.setText(j + "");
				}
			}

			
			
			public void onStartTrackingTouch(SeekBar seekBar) {
			}

			
			
			public void onStopTrackingTouch(SeekBar seekBar) {
			}

		});
		String string = book.getProgress();
		Log.d(TAG, "a" + string + "a");
		String begin = string.substring(0, string.indexOf('.'));
		String end = string.substring(string.indexOf('.') + 1, string.length() - 1);
		Log.d(TAG, begin + end);
		seekBar.setProgress(Integer.parseInt(begin));
		prog_int.setText(begin);
		prog_float.setText(end);
		AlterD = new AlertDialog.Builder(this);
		AlterD.setTitle("进度跳转");
		AlterD.setIcon(R.drawable.mb);
		// AlterD.setMessage("测试View加入进度条");
		AlterD.setView(myLayout);
		AlterD.setPositiveButton("确定", new DialogInterface.OnClickListener() {
		
			public void onClick(DialogInterface dialog, int which) {
				DecimalFormat df = new DecimalFormat("#0.00");
				Log.d(TAG, "prog_int:" + prog_int.getText().toString() + ",prog_float:" + prog_float.getText().toString());
				String string = prog_int.getText().toString() + "." + prog_float.getText().toString();
				double d = Double.parseDouble(string);
				double fp = new Double(df.format(d / 100));
				int begin = (int) (fp * fileLenth);
				Log.d(TAG, "begin:" + begin);
				Log.d(TAG, "fileLenth:" + fileLenth);
				pagefactory.setM_mbBufEnd(begin);
				pagefactory.onDraw(mCurPageCanvas);
				
			}
		});
		AlterD.setNegativeButton("取消", new DialogInterface.OnClickListener() {
			
			public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();
			}
		});
		AlterD.show();
		break;
	}
	return super.onOptionsItemSelected(item);
}

private AlertDialog.Builder AlterD;
SeekBar seekBar;
EditText prog_int, prog_float;

// 改变阅读页面的返回事件
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
	if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
		startActivity(new Intent(this, MyBook.class));
		ReadBook.this.finish();
		return false;
	}
	return false;
}

}