来源: 互联网  发布时间: 2014-02-18

控制Activity在横屏切换时不刷新
针对需要控制在屏幕横、纵屏幕切换时不需要刷新的Activity,在对应的AndroidManifest.xml文件中，增加如下配置：

<activity android:name="org.huareal.game.fivechess.FiveChessGame" android:screenOrientation="portrait"  ‍android:configChanges="orientation|keyboardHidden|navigation" ></activity>
  <activity android:name="GameCategary"></activity>

比如两个Activity,第一个org.huareal.game.fivechess.FiveChessGame 希望屏幕默认显示为portait方式，在切换屏幕时不会刷新

android:screenOrientation="portrait"

android:configChanges="orientation|keyboardHidden|navigation"

注意：如果只填写android:configChanges,在模拟器上测试正常，但是在真机测试不正常，所以第一项android:screenOrientation必须配置

    

    来源: 互联网  发布时间: 2014-02-18

UITableView和键盘滚动问题

 

- (void)viewWillAppear:(BOOL)animated {
	[[NSNotificationCenter defaultCenter] addObserver:self 
											 selector:@selector(keyboardWillShow:) 
												 name:UIKeyboardWillShowNotification 
											   object:nil]; 
	
	[[NSNotificationCenter defaultCenter] addObserver:self 
											 selector:@selector(keyboardWillHide:) 
												 name:UIKeyboardWillHideNotification 
											   object:nil];
}

- (void)viewWillDisappear:(BOOL)animated {
	[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
	[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];

 

-(void) keyboardWillShow:(NSNotification *)note { 
	NSDictionary *info = [note userInfo];
	CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
	CGRect bkgndRect = self.ncTableView.frame;
	bkgndRect.size.height += kbSize.height;
	self.ncTableView.contentSize = bkgndRect.size;
//	CGFloat tmpY=activeField.frame.origin.y-((self.view.frame.size.height-kbSize.height)-activeField.frame.size.height-8);
//	if(tmpY>0){		
//		[self.scrollView setContentOffset:CGPointMake(0.0, tmpY) animated:YES];		
//	} 
} 

- (void)keyboardWillHide:(NSNotification*)aNotification{
	NSTimeInterval animationDuration=0.30f;
	[UIView beginAnimations:@"ResizeForKeyboard" context:nil];
	[UIView setAnimationDuration:animationDuration];
	
	
	NSDictionary *info = [aNotification userInfo];
	CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

	CGRect bkgndRect = self.ncTableView.frame;
	bkgndRect.size.height -= kbSize.height;
	//NIF_DEBUG(@"kbSize x:%f %f",kbSize.height,kbSize.width);
	
	self.ncTableView.contentSize = bkgndRect.size;
	[UIView commitAnimations];
	
	
	//[self.scrollView setContentOffset:CGPointMake(0.0, activeField.frame.origin.y - 15) animated:YES];
	//CGFloat tmpY=activeField.frame.origin.y-((self.view.frame.size.height-kbSize.height)-activeField.frame.size.height-8);
	
}

    

    来源: 互联网  发布时间: 2014-02-18

Drawable、Bitmap、byte[]之间的转换(转)
1、Drawable → Bitmap

public static Bitmap drawableToBitmap(Drawable drawable) {
        
        Bitmap bitmap = Bitmap
                        .createBitmap(
                                        drawable.getIntrinsicWidth(),
                                        drawable.getIntrinsicHeight(),
                                        drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
                                                        : Bitmap.Config.RGB_565);
        Canvas canvas = new Canvas(bitmap);
        //canvas.setBitmap(bitmap);
        drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
        drawable.draw(canvas);
        return bitmap;
}

//简单方法

((BitmapDrawable)res.getDrawable(R.drawable.youricon)).getBitmap(); 

2、从资源中获取Bitmap

Resources res=getResources();

Bitmap bmp=BitmapFactory.decodeResource(res, R.drawable.pic);

3、Bitmap → byte[]

private byte[] Bitmap2Bytes(Bitmap bm){
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
return baos.toByteArray();
 }

4、 byte[] → Bitmap

private Bitmap Bytes2Bimap(byte[] b){
		    if(b.length!=0){
		    	return BitmapFactory.decodeByteArray(b, 0, b.length);
		    }
		    else {
		    	return null;
		    }
	  }

5.  Bitmap → Drawable   的简单方法

BitmapDrawable bitmapDrawable = (BitmapDrawable)bitmap;     
Drawable drawable = (Drawable)bitmapDrawable; 


Bitmap bitmap = new Bitmap (...);     
Drawable drawable = new BitmapDrawable(bitmap);