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    ▪Core Data浅谈系列之5 ： 在UITableView中展示        Core Data浅谈系列之五 ： 在UITableView中展示 首先，为App添加导航栏： - (NSArray *)fetchPlayerList { NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *teamEntity = [NSEntityDescription enti.........
    ▪ Pract03 Intent的运用与多个Activity的交互        Pract03 Intent的应用与多个Activity的交互实机测试界面截图如下： AndroidManifest.xml <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="folyd.pract0.........
    ▪ DatePickerDialog日期范畴的控制       DatePickerDialog日期范围的控制我用的是自定义dialog实现的，在DatePicker的onDateChangedListentr事件中实现范围的控制 代码如下： public class MainActivity extends Activity { /** Called when the activity is first created.........

[1]Core Data浅谈系列之5 ： 在UITableView中展示
    来源: 互联网  发布时间: 2014-02-18
Core Data浅谈系列之五 ： 在UITableView中展示
在逻辑上（表关系）将Team和Player关联起来后，我们将其展现到UI视图上。

首先，为App添加导航栏：
@interface AppDelegate : UIResponder <UIApplicationDelegate >

@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) UINavigationController *navController;
@property (strong, nonatomic) ViewController *viewController;

@end


@implementation AppDelegate

- (void)dealloc
{
    [_window release];
    [_navController release];
    [_viewController release];
    [super dealloc];
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.
    self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
    self.navController = [[[UINavigationController alloc] initWithRootViewController:self.viewController] autorelease];
    self.window.rootViewController = self.navController;
    [self.window makeKeyAndVisible];
    return YES;
}
然后在ViewController上添加一个UITableView，布局好并实现如下相应的代理函数：
#pragma mark - 
#pragma mark - UITableView DataSource

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

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

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellIdentifier = @"TeamTableViewCellIdentifier";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if (nil == cell) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellIdentifier] autorelease];
    }
    
    Team *teamObject = [self.teamArray objectAtIndex:indexPath.row];
    UIImage *nbaImage = [UIImage imageNamed:@"nba@2x.jpg"];
    cell.imageView.image = nbaImage;
    cell.imageView.backgroundColor = [UIColorredColor];
    cell.textLabel.text = teamObject.name;
    cell.detailTextLabel.text = teamObject.city;
    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    
    return cell;
}

#pragma mark - 
#pragma mark - UITableView Delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    
    Team *teamObject = [self.teamArray objectAtIndex:indexPath.row];
    PlayerListViewController *playerListVC = [[[PlayerListViewController alloc] init] autorelease];
    playerListVC.team = teamObject;
    playerListVC.cdViewController = self;
    [self.navigationController pushViewController:playerListVC animated:YES];
}
在插入一些球队信息后，可以得到如下效果（按球队名称排序）：


- (NSArray *)fetchTeamList
{
    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
    NSEntityDescription *teamEntity = [NSEntityDescription entityForName:@"Team" inManagedObjectContext:self.managedObjectContext];
    [fetchRequest setEntity:teamEntity];
    
    NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"name"ascending:YES];
    [fetchRequest setSortDescriptors:[NSArray arrayWithObject:sortDescriptor]];
    
    NSError *error = NULL;
    NSArray *array = [self.managedObjectContext executeFetchRequest:fetchRequest error:&error];
    if (error) {
        NSLog(@"Error : %@\n", [error localizedDescription]);
    }
    
    [fetchRequest release], fetchRequest = nil;
    
    return array;
}
点击cell，就进入到该队的球员列表：


- (NSArray *)fetchPlayerList
{
    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
    NSEntityDescription *teamEntity = [NSEntityDescription entityForName:@"Player" inManagedObjectContext:self.cdViewController.managedObjectContext];
    [fetchRequest setEntity:teamEntity];
    
    NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"age"ascending:YES];
    [fetchRequest setSortDescriptors:[NSArray arrayWithObject:sortDescriptor]];
    
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"team == %@", self.team];
    [fetchRequest setPredicate:predicate];
    
    NSError *error = NULL;
    NSArray *array = [self.cdViewController.managedObjectContext executeFetchRequest:fetchRequest error:&error];
    if (error) {
        NSLog(@"Error : %@\n", [error localizedDescription]);
    }
    
    [fetchRequest release], fetchRequest = nil;
    
    return array;
}
通过导航栏右边的Add按钮来添加球员信息：


- (IBAction)addBtnDidClick:(id)sender
{
    // We don't check the user input.
    Player *playerObject = [NSEntityDescription insertNewObjectForEntityForName:@"Player" inManagedObjectContext:self.cdViewController.managedObjectContext];
    playerObject.name = self.nameTextField.text;
    playerObject.age = [NSNumber numberWithInteger:[self.ageTextField.text integerValue]];
    playerObject.team = self.team;
    [self.cdViewController saveContext];
    [self dismissModalViewControllerAnimated:YES];
}


- (IBAction)cancelBtnDidClick:(id)sender
{
    [self dismissModalViewControllerAnimated:YES];
}
以上对NSManagedObject的操作都位于同一份NSManagedObjectContext中。如上面添加球员的函数addBtnDidClick:所注释的，添加球员信息时并没有对数据进行验证 —— 这将在下一篇讨论。

Brief Talk About Core Data Series, Part 5 : Showing in UITableView

Jason Lee @ Hangzhou
Blog : http://blog.csdn.net/jasonblog
Weibo : http://weibo.com/jasonmblog


    
[2] Pract03 Intent的运用与多个Activity的交互
    来源: 互联网  发布时间: 2014-02-18
Pract03 Intent的应用与多个Activity的交互

实机测试界面截图如下：



AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="folyd.pract03"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="folyd.pract03.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".OtherAct" android:label="@string/otname">
            
        </activity>
    </application>

</manifest>


MainActivity.java

package folyd.pract03;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;
import android.widget.Button;

public class MainActivity extends Activity {
	private TextView tv=null;
	private Button btn=null;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		tv=(TextView)findViewById(R.id.myTextview);
		btn=(Button)findViewById(R.id.myButton);
		tv.setText(R.string.textview);
		btn.setText(R.string.button);
		btn.setOnClickListener(new myButtonListener());//设置Button按钮的监听器
	}
    class myButtonListener implements OnClickListener{

		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			Intent intent=new Intent();//申明Intent对象
			intent.setClass(MainActivity.this, OtherAct.class);//调用Intent类的setClass() 方法设置要跳转到哪个Activity
			MainActivity.this.startActivity(intent);//调用Activity的startActivity() 方法
		}
    	
    }
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.activity_main, menu);
		return true;
	}

}



OtherAct.java 

package folyd.pract03;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class OtherAct extends Activity{
	private TextView tv=null;
	private Button btn=null;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.other);
		tv=(TextView)findViewById(R.id.myTextview);
		btn=(Button)findViewById(R.id.myButton);
		tv.setText(R.string.text2);
		btn.setText(R.string.send);
		btn.setOnClickListener(new OnClickListener() {//设置Button按钮的监听器，与MainActivity.java 类似
			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				Uri uri=Uri.parse("smsto:1308008000");//设置要发送的手机号码
				Intent intent=new Intent(Intent.ACTION_SENDTO,uri);
				intent.putExtra("sms_body", "我已经成功安装了你的Android应用程序了哦。");
				startActivity(intent);
			}
		});
	}
	

}



activity_main.xml 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:background="#6699aa"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    

    <TextView android:id="@+id/myTextview"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
    <Button android:id="@+id/myButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />

</LinearLayout>

other.xml 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    

    <TextView android:id="@+id/myTextview"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
    <Button android:id="@+id/myButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />

</LinearLayout>

string.xml 

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">Pract03</string>
    <string name="otname">OtherActivity</string>
    <string name="textview">Touch it to start an activity.</string>
    <string name="button">Confirm</string>
    <string name="menu_settings">Settings</string>
    <string name="text2">This is the second activity.</string>
    <string name="send">SendMSG</string>

</resources>

R.java 

/* AUTO-GENERATED FILE.  DO NOT MODIFY.
 *
 * This class was automatically generated by the
 * aapt tool from the resource data it found.  It
 * should not be modified by hand.
 */

package folyd.pract03;

public final class R {
    public static final class attr {
    }
    public static final class drawable {
        public static final int ic_launcher=0x7f020000;
    }
    public static final class id {
        public static final int menu_settings=0x7f070002;
        public static final int myButton=0x7f070001;
        public static final int myTextview=0x7f070000;
    }
    public static final class layout {
        public static final int activity_main=0x7f030000;
        public static final int other=0x7f030001;
    }
    public static final class menu {
        public static final int activity_main=0x7f060000;
    }
    public static final class string {
        public static final int app_name=0x7f040000;
        public static final int button=0x7f040003;
        public static final int menu_settings=0x7f040004;
        public static final int otname=0x7f040001;
        public static final int send=0x7f040006;
        public static final int text2=0x7f040005;
        public static final int textview=0x7f040002;
    }
    public static final class style {
        /** 
        Base application theme, dependent on API level. This theme is replaced
        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
    

            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
        

        Base application theme for API 11+. This theme completely replaces
        AppBaseTheme from res/values/styles.xml on API 11+ devices.
    
 API 11 theme customizations can go here. 

        Base application theme for API 14+. This theme completely replaces
        AppBaseTheme from BOTH res/values/styles.xml and
        res/values-v11/styles.xml on API 14+ devices.
    
 API 14 theme customizations can go here. 
         */
        public static final int AppBaseTheme=0x7f050000;
        /**  Application theme. 
 All customizations that are NOT specific to a particular API-level can go here. 
         */
        public static final int AppTheme=0x7f050001;
    }
}






    
[3] DatePickerDialog日期范畴的控制
    来源: 互联网  发布时间: 2014-02-18
DatePickerDialog日期范围的控制

我用的是自定义dialog实现的，在DatePicker的onDateChangedListentr事件中实现范围的控制

代码如下：

public class MainActivity extends Activity {
	/** Called when the activity is first created. */

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		final TextView text = (TextView) findViewById(R.id.text);
		LayoutInflater l = LayoutInflater.from(this);
		View v = l.inflate(R.layout.dialog, null);
		final DatePicker datePicker = (DatePicker) v
				.findViewById(R.id.datepicker);
		
		datePicker.init(2000, 1, 3, new OnDateChangedListener() {

			@Override
			public void onDateChanged(DatePicker view, int year,
					int monthOfYear, int dayOfMonth) {

				if (isDateAfter(view)) {
					view.init(2000, 11, 30, this);
				}
				if (isDateBefore(view)) {
					view.init(1949, 11, 30, this);
				}
			}

			private boolean isDateAfter(DatePicker tempView) {
				if (tempView.getYear() > 2000) {
					return true;
				} else
					return false;
			}

			private boolean isDateBefore(DatePicker tempView) {
				if (tempView.getYear() < 1921) {
					return true;
				} else
					return false;
			}
		});
		Dialog dialog = new AlertDialog.Builder(this)
				.setTitle(
						datePicker.getYear() + "年"
								+ (datePicker.getMonth() + 1) + "月"
								+ datePicker.getDayOfMonth() + "日")
				.setView(v)
				.setIcon(R.drawable.ic_dialog_time)
				.setNeutralButton("设置", new DialogInterface.OnClickListener() {

					@Override
					public void onClick(DialogInterface dialog, int which) {

						text.setText(datePicker.getYear() + "年"
								+ (datePicker.getMonth() + 1) + "月"
								+ datePicker.getDayOfMonth() + "日");
					}
				})
				.setNegativeButton("取消", new DialogInterface.OnClickListener() {

					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.cancel();

					}
				}).create();

		dialog.show();

	}
}


自定义的dialog.xml代码如下

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <DatePicker
        android:id="@+id/datepicker"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

</LinearLayout>


 以上在3.0版本之前支持，在3.0版本以后请使用下面的方法

public void onClick(View v) {
		switch (answer.type) {
		case 1:// 日期类型

			DatePickerDialog dialog = new DatePickerDialog(ctx, this, 1980, 0,
					1);
			DatePicker datePicker = dialog.getDatePicker();
			datePicker.setMinDate(DateUtils.getInstance().format("1970-01-01")
					.getTime());
			datePicker.setMaxDate(DateUtils.getInstance().format("2013-01-07")
					.getTime());
			dialog.show();
			break;
		}
	}

	@Override
	public void onDateSet(DatePicker view, int year, int monthOfYear,
			int dayOfMonth) {
		editText.setText(year + "年" + (monthOfYear + 1) + "月" + dayOfMonth
				+ "日");
	}


 

 


    
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