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;
}

}

转载于:https://www.cnblogs.com/qiushi123/p/7003938.html