大家好,感谢阅读我的回答希望你能帮助我
我正在黑莓手机上进行图像裁剪。在我的应用程序中包含 3 个主要内容。
1)将图像加载到屏幕上
2)选择裁剪区域的形状
3)在下一个屏幕上显示裁剪图像而不丢失其形状
第1步:我可以完成图像加载部分
步骤2:使用菜单我只添加4种类型的形状
1)Circle
2)Rectangle with rounded shape
3)Star
4)Cloud
使用菜单,当他单击任何菜单项时,特定形状的图像将显示在屏幕上。
我们可以给该图像赋予运动,因为我们必须让他选择图像的任何部分。
步骤3:固定位置后,我们将允许用户使用菜单进行裁剪。
当他点击菜单项“CROP”时。然后我们必须根据形状裁剪图像,并且该图像应该显示在下一个屏幕上
注意:以下代码仅适用于矩形形状,但我想
使用所有形状
这是我的示例代码::
import net.rim.device.api.system.Bitmap;
import net.rim.device.api.system.Display;
import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.Graphics;
import net.rim.device.api.ui.Manager;
import net.rim.device.api.ui.MenuItem;
import net.rim.device.api.ui.Screen;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.XYEdges;
import net.rim.device.api.ui.XYRect;
import net.rim.device.api.ui.component.BitmapField;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.Menu;
import net.rim.device.api.ui.container.MainScreen;
import net.rim.device.api.ui.container.VerticalFieldManager;
import net.rim.device.api.ui.decor.BackgroundFactory;
public class ClipMove extends MainScreen{
Bitmap circle_frame,rectangle_frame,star_frame,cloud_frame,image,selected_frame;
BitmapField frmae_field;
private int padding_x=0,padding_y=0;
private VerticalFieldManager vrt_mgr;
public ClipMove() {
//Here my shape images are transparent
circle_frame=Bitmap.getBitmapResource("circle.gif");
rectangle_frame=Bitmap.getBitmapResource("rect1.png");
star_frame=Bitmap.getBitmapResource("star.gif");
cloud_frame=Bitmap.getBitmapResource("cloud.gif");
//this is my actual image to crop
image=Bitmap.getBitmapResource("sample.jpg");
vrt_mgr=new VerticalFieldManager(){
protected void sublayout(int maxWidth, int maxHeight) {
super.sublayout(Display.getWidth(),Display.getHeight());
setExtent(Display.getWidth(),Display.getHeight());
}
};
vrt_mgr.setBackground(BackgroundFactory.createBitmapBackground(image));
add(vrt_mgr);
}
protected void makeMenu(Menu menu, int instance) {
super.makeMenu(menu, instance);
menu.add(new MenuItem("Rect",0,0) {
public void run() {
// TODO Auto-generated method stub
vrt_mgr.deleteAll();
selected_frame=rectangle_frame;
frmae_field=new BitmapField(rectangle_frame);
vrt_mgr.add(frmae_field);
vrt_mgr.invalidate();
}
});
menu.add(new MenuItem("Circle",0,0) {
public void run() {
// TODO Auto-generated method stub
vrt_mgr.deleteAll();
selected_frame=circle_frame;
frmae_field=new BitmapField(circle_frame);
vrt_mgr.add(frmae_field);
vrt_mgr.invalidate();
}
});
menu.add(new MenuItem("Star",0,0) {
public void run() {
// TODO Auto-generated method stub
vrt_mgr.deleteAll();
selected_frame=star_frame;
frmae_field=new BitmapField(star_frame);
vrt_mgr.add(frmae_field);
vrt_mgr.invalidate();
}
});
menu.add(new MenuItem("Cloud",0,0) {
public void run() {
// TODO Auto-generated method stub
vrt_mgr.deleteAll();
selected_frame=cloud_frame;
frmae_field=new BitmapField(cloud_frame);
vrt_mgr.add(frmae_field);
vrt_mgr.invalidate();
}
});
menu.add(new MenuItem("Crop",0,0) {
public void run() {
// TODO Auto-generated method stub
Field f=vrt_mgr.getField(0);
// XYRect rect=getFieldExtent(f);
XYRect rect=new XYRect(padding_x, padding_y,frmae_field.getBitmapWidth(),frmae_field.getBitmapHeight());
Bitmap crop = cropImage(image, rect.x, rect.y,
rect.width, rect.height);
synchronized (UiApplication.getEventLock()) {
UiApplication.getUiApplication().pushScreen(new sampleScreen(crop,selected_frame));
}
}
});
}
protected boolean navigationMovement(int dx, int dy, int status, int time) {
if(frmae_field!=null){
padding_x=padding_x+dx;
padding_y=padding_y+dy;
XYEdges edge=new XYEdges(padding_y, 0, 0, padding_x);
frmae_field.setPadding(edge);
vrt_mgr.invalidate();
return true;
}else {
return false;
}
}
public void DisplayMessage(final String str)
{
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
Dialog.inform(str);
}
});
}
public XYRect getFieldExtent(Field fld) {
int cy = fld.getContentTop();
int cx = fld.getContentLeft();
Manager m = fld.getManager();
while (m != null) {
cy += m.getContentTop() - m.getVerticalScroll();
cx += m.getContentLeft() - m.getHorizontalScroll();
if (m instanceof Screen)
break;
m = m.getManager();
}
return new XYRect(cx, cy, fld.getContentWidth(), fld.getContentHeight());
}
// this logic only useful for rectangler shape
public Bitmap cropImage(Bitmap image, int x, int y, int width,int height) {
Bitmap result = new Bitmap(width, height);
Graphics g = Graphics.create(result);
g.drawBitmap(0, 0, width, height, image, x, y);
return result;
}
}
//this is my next screen to show the croped image
class sampleScreen extends MainScreen
{
VerticalFieldManager manager;
public sampleScreen(final Bitmap img,final Bitmap back) {
manager=new VerticalFieldManager(){
protected void paint(Graphics graphics) {
graphics.drawBitmap(0, 0, img.getWidth(), img.getHeight(), img, 0, 0);
super.paint(graphics);
}
protected void sublayout(int maxWidth, int maxHeight) {
super.sublayout( img.getWidth(), img.getHeight());
setExtent( img.getWidth(), img.getHeight());
}
};
BitmapField field=new BitmapField(back);
field.setPadding(0, 0, 0, 0);
manager.add(field);
add(manager);
}
}
我的屏幕截图: