来源: 互联网  发布时间: 2014-02-18

app开机启动遇到的问题
今天在做开机启动app的时候遇到一个问题， 就是当你的app安装到sdcard里时， 使用BroadcastReceiver来实现开机启动app是不行的。 因为ACTION_BOOT_COMPLETED broadcast是在mount sdcard之前的， 所以你的app那时候还没有ready。 所以只有把你的app安装到phone里面。 我看了task killer也是这样的。


开机启动：http://l12052124.iteye.com/blog/893106
原因：http://stackoverflow.com/questions/5741987/android-how-to-start-an-application-on-the-sdcard-after-boot

    

    来源: 互联网  发布时间: 2014-02-18

ls -l 命令详细解释

fenghuo@bluesky:~/folder$ ls -l
total 244   //该目录的总容量（kb）
-rwxrwxrwx 1 root root 245272 2011-09-20 15:10 com.google.android.maps.jar
-rwxrwxrwx 1 root root    816 2011-09-20 15:08 com.google.android.maps.xml

《-代表文件，d代表目录，l代表链接，一个快捷键，b设备文件block》
《r表是读 (Read)，w表示写 (Write)，x表示执行 (eXecute)   其中前三个表示文件属主的权限,中间三个表示组用户权限,最后三个表示其他用户权限》
《1 代表子目录数目，默认有两个为2;如果不是目录，则代表文件的名字（链接）的数目》
《第一个root,文件拥有者;linux属于多用户操作系统，每个文件都有自己的拥有者，root用户具有改动任何文件属性的权利》
《第二个用户是文件拥有者所在组，组的成员和other用户的权限可以设置不同》
《第5个字段，文件大小》 如果是文件夹，指的是文件夹本身的大小，而不是文件夹内部所有文件的总的大小

 

 

修改权限sudo chomd 777 文件名 

                sudo chmod a+x  文件名

修改所有者和组

              sudo chown    -R  所有者:组   文件 名

    

    来源: 互联网  发布时间: 2014-02-18

UISearchBar and UITableView搜索例子
UISearchBar and UITableView是我们很常用的组合，在uisearchbar搜索之后，在uitableview显示你搜索后的数据，先看最终效果图如下：



拖入UISearchBar and UITableView两个控件，SearchViewController.h代码如下：

//
//  SearchViewController.h
//
#import <UIKit/UIKit.h>

@interface SearchViewController : UIViewController
<UISearchBarDelegate, UITableViewDataSource> {
NSMutableArray *tableData;

UIView *disableViewOverlay;

UITableView *theTableView;
UISearchBar *theSearchBar;
}

@property(retain) NSMutableArray *tableData;
@property(retain) UIView *disableViewOverlay;

@property (nonatomic, retain) IBOutlet UITableView *theTableView;
@property (nonatomic, retain) IBOutlet UISearchBar *theSearchBar;

- (void)searchBar:(UISearchBar *)searchBar activate:(BOOL) active;

@end

SearchViewController.m 如下：

//
//  SearchViewController.m
//
#import "SearchViewController.h"

@implementation SearchViewController
@synthesize tableData;
@synthesize disableViewOverlay;
@synthesize theSearchBar;
@synthesize theTableView;


// Initialize tableData and disabledViewOverlay
- (void)viewDidLoad {
    [super viewDidLoad];
    self.tableData =[[NSMutableArray alloc]init];
    self.disableViewOverlay = [[UIView alloc]
     initWithFrame:CGRectMake(0.0f,44.0f,320.0f,416.0f)];
    self.disableViewOverlay.backgroundColor=[UIColor blackColor];
    self.disableViewOverlay.alpha = 0;
}

// Since this view is only for searching give the UISearchBar
// focus right away
- (void)viewDidAppear:(BOOL)animated {
    [self.theSearchBar becomeFirstResponder];
    [super viewDidAppear:animated];
}

#pragma mark -
#pragma mark UISearchBarDelegate Methods

- (void)searchBar:(UISearchBar *)searchBar
    textDidChange:(NSString *)searchText {
  // We don't want to do anything until the user clicks
  // the 'Search' button.
  // If you wanted to display results as the user types
  // you would do that here.
}

- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar {
    // searchBarTextDidBeginEditing is called whenever
    // focus is given to the UISearchBar
    // call our activate method so that we can do some
    // additional things when the UISearchBar shows.
    [self searchBar:searchBar activate:YES];
}

- (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar {
    // searchBarTextDidEndEditing is fired whenever the
    // UISearchBar loses focus
    // We don't need to do anything here.
}

- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
    // Clear the search text
    // Deactivate the UISearchBar
    searchBar.text=@"";
    [self searchBar:searchBar activate:NO];
}

- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
    // Do the search and show the results in tableview
    // Deactivate the UISearchBar

    // You'll probably want to do this on another thread
    // SomeService is just a dummy class representing some
    // api that you are using to do the search
    NSArray *results = [SomeService doSearch:searchBar.text];

    [self searchBar:searchBar activate:NO];

    [self.tableData removeAllObjects];
    [self.tableData addObjectsFromArray:results];
    [self.theTableView reloadData];
}

// We call this when we want to activate/deactivate the UISearchBar
// Depending on active (YES/NO) we disable/enable selection and
// scrolling on the UITableView
// Show/Hide the UISearchBar Cancel button
// Fade the screen In/Out with the disableViewOverlay and
// simple Animations
- (void)searchBar:(UISearchBar *)searchBar activate:(BOOL) active{
    self.theTableView.allowsSelection = !active;
    self.theTableView.scrollEnabled = !active;
    if (!active) {
        [disableViewOverlay removeFromSuperview];
        [searchBar resignFirstResponder];
    } else {
        self.disableViewOverlay.alpha = 0;
        [self.view addSubview:self.disableViewOverlay];

        [UIView beginAnimations:@"FadeIn" context:nil];
        [UIView setAnimationDuration:0.5];
        self.disableViewOverlay.alpha = 0.6;
        [UIView commitAnimations];

        // probably not needed if you have a details view since you
        // will go there on selection
        NSIndexPath *selected = [self.theTableView
            indexPathForSelectedRow];
        if (selected) {
            [self.theTableView deselectRowAtIndexPath:selected
                animated:NO];
        }
    }
    [searchBar setShowsCancelButton:active animated:YES];
}


#pragma mark -
#pragma mark UITableViewDataSource Methods

- (NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section {
    return [tableData count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView
         cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *MyIdentifier = @"SearchResult";
    UITableViewCell *cell = [tableView
     dequeueReusableCellWithIdentifier:MyIdentifier];

    if (cell == nil) {
        cell = [[[UITableViewCell alloc]
         initWithStyle:UITableViewCellStyleDefault
         reuseIdentifier:MyIdentifier] autorelease];
    }

    id *data = [self.tableData objectAtIndex:indexPath.row];
    cell.textLabel.text = data.name;
    return cell;
}

#pragma mark -
#pragma mark Memory Management Methods

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
    // Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


- (void)dealloc {
    [theTableView release], theTableView = nil;
    [theSearchBar release], theSearchBar = nil;
    [tableData dealloc];
    [disableViewOverlay dealloc];
    [super dealloc];
}

@end