来源: 互联网  发布时间: 2014-02-18

监听home键及发送ontouch事件方法

// 比如说在button的onclick事件中，要发送一个ontouch的up事件，做法如下：
public void clickBtn(View v){
dispatchTouchEvent.(MotionEvent.obtain(SystemClock.uptimeMillis(),SystemClock.uptimeMillis(), MotionEvent.ACTION_UP, 240, 400, 0));
}
// 期中该btn的onclick事件是在xml里面注册的
<Button android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:text="发送onTouch的 UP事件"
android:onClick="clickBtn" />

// 截获Home事件做法
// 1.加权限禁止Home键  
 <uses-permission android:name="android.permission.DISABLE_KEYGUARD"></uses-permission> 
// 2.复写 onAttachedToWindow()  
@Override  
 public void onAttachedToWindow()  
 {  
   // TODO Auto-generated method stub  
   this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);     
   super.onAttachedToWindow();  
 }
// 3.监听onKeyDown事件
@Override  
 public boolean onKeyDown(int keyCode, KeyEvent event)  
 {  
   // TODO Auto-generated method stub  
   if(KeyEvent.KEYCODE_HOME==keyCode)  
     android.os.Process.killProcess(android.os.Process.myPid());  
   return super.onKeyDown(keyCode, event);  
 }  

    

    来源: 互联网  发布时间: 2014-02-18

播放中文歌曲时，歌词乱码的解决方法
前一段时间写mp3播放器的应用，发现一播放中文歌曲时，歌词就会出现乱码，搜了很久都没有找到答案。今天终于被我找出那个可恶的Bug了。原来在取歌词文件时用的方法“br = new BufferedReader(new InputStreamReader(new FileInputStream(file), "GBK"));”中的“GBK”出了问题。我下载的中文歌词文件是用“UTF-8”编码表来编码的，当用“GBK”编码表来读取时就会出现乱码了。将“UTF-8”替代“GBK”，问题得到解决。
刚才在csdn上还找到另一种完美的解决办法，就是自动识别文件的编码格式，然后进行转换。链接：http://blog.csdn.net/yangchuxi/article/details/6670538有兴趣的可以去看一下~

    

    来源: 互联网  发布时间: 2014-02-18

半手工打造一個Viewer (配合NIB)

//
//  main.m
//  
//
//  Created by unknown on 12/6/1.
//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
//

#import <UIKit/UIKit.h>

// 好用的列按鈕項目建立巨集
#define BARBUTTON(TITLE, SELECTOR)     [[UIBarButtonItem alloc] \
initWithTitle:TITLE style:UIBarButtonItemStylePlain target:self \
action:SELECTOR]

//Step 5.a 設計一個ViewController
@interface convertController:UIViewController
{
	
	UITextField *field1;
	UITextField *field2;
}
-(IBAction)doConvert:(id)sender;
@end

@implementation convertController
//Step 5.b 複寫loadView來佈置此ViewController的layerOut
-(void)loadView
{
	// 建立視圖
	self.view=[[[NSBundle mainBundle]loadNibNamed:@"View" owner:self options:NULL] lastObject];
	
	//映射到HelloWorldController的item
	field1=(UITextField *)[self.view viewWithTag:11];
	field2=(UITextField *)[self.view viewWithTag:12];
	
	[field1 setText:@"100"];
	
	UIBarButtonItem *convertButtonItem =[[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doConvert:)] autorelease];
	
	self.navigationItem.rightBarButtonItem=convertButtonItem;
	
	[self setTitle:@"Converter"];
    

}
-(IBAction)doConvert:(id)sender
{
	float invalue = [[field1 text] floatValue];
    float outvalue = (invalue - 32.0f) * 5.0f / 9.0f;
    [field2 setText:[NSString stringWithFormat:@"%3.2f", outvalue]];
    [field1 resignFirstResponder];
}
// 應用程式支援所有裝置擺設方向
- (BOOL) shouldAutorotateToInterfaceOrientation:
(UIInterfaceOrientation)toInterfaceOrientation
{
    return YES;
}
@end


//=====================
//Step 1.建立UIApplicationDelegaye class
@interface converDelegate :NSObject<UIApplicationDelegate>
{
//Step 2.加入window 指標	
	UIWindow *_window;
}

@end

@implementation converDelegate
//Step 3.複寫applicationDidFinishLaunching
-(void)applicationDidFinishLaunching:(UIApplication *)application
{
	//Step 4.構建window,並且保留在_window
	_window=[[UIWindow alloc]initWithFrame:[[UIScreen mainScreen]bounds]];
	//Step 5.建構一個UINavigationController,並且初始化一個converController 物件當做RootViewController
	UINavigationController *nc=[[UINavigationController alloc]initWithRootViewController:[[convertController alloc]init]];
	//Step 6.把nc挂入到window的Root
	[_window setRootViewController:nc];
	//Step 7.show window 
	[_window makeKeyAndVisible];
}

@end


int main(int argc, char *argv[])
{
	@autoreleasepool {
	    return UIApplicationMain(argc, argv, nil, @"converDelegate");
	}
}