在Tag Bar中应用Navgation - 兑现ListView背景

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▪在Tag Bar中应用Navgation 在Tag Bar中使用Navgation 前面分别学到了Tag Bar和Navigation的使用，这次我们把他合起来使用，效果如下图首先创建项目，选择window based application。项目名称为Nav_Tagbar。在.h中完成代码#import <UIKi.........

▪ 兑现ListView背景实现ListView背景实现ListView背景ListView这里实现了1、点击ListView中的Item都会改变此Item的背景2、使用Theme自定义Item选择器，也就是当选中一个item的时候，此item的背景改变文件说明： ListDemo.........

▪ 两种保留方法两种保存方法暂时的 @Overridepublic void onSaveInstanceState(Bundle savedInstanceState) { // Store UI state to the savedInstanceState. // This bundle will be passed to onCreate on next call. EditText txtName = .........

[1]在Tag Bar中应用Navgation

来源: 互联网发布时间: 2014-02-18

在Tag Bar中使用Navgation
前面分别学到了Tag Bar和Navigation的使用，这次我们把他合起来使用，效果如下图

首先创建项目，选择window based application。项目名称为Nav_Tagbar。在.h中完成代码

#import <UIKit/UIKit.h>
@interface Nav_TagbarAppDelegate : NSObject <UIApplicationDelegate> {
    UIWindow *window;
	UITabBarController *rootController;
}
@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet UITabBarController *rootController;
@end

在.m中完成代码

#import "Nav_TagbarAppDelegate.h"
@implementation Nav_TagbarAppDelegate
@synthesize window;
@synthesize rootController;
#pragma mark -
#pragma mark Application lifecycle
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
    [window addSubview:rootController.view];
    [window makeKeyAndVisible];
    return YES;
}
- (void)dealloc {
	[rootController release];
    [window release];
    [super dealloc];
}
@end

再创建三个类，名为navView，secondView，thirdView，并生成视图。下面进行页面设计。双击MainWindow.xib，首先将一个Tag Bar Controller拖入nib主窗口中，按住Ctrl将Nav Tagbar App Delegate拖入Tag Bar Controller。之后将一个Navigation Controller拖入Tag Bar Controller中，如图

再做好相对界面的视图和控制器选择。这是nav的选择

在navView.xib中生成一个按钮，实现入栈跳转。在相应的.h.m文件中实现如下代码

#import <UIKit/UIKit.h>
@interface navView : UIViewController {
}
-(IBAction)buttonPressed;
@end

#import "navView.h"
#import "thirdView.h"
@implementation navView
-(IBAction)buttonPressed{
	thirdView *mythirdView = [[thirdView alloc] initWithNibName:@"thirdView" bundle:nil];
	[self.navigationController pushViewController:mythirdView animated:YES];
	[mythirdView release];
}

[2] 兑现ListView背景

来源: 互联网发布时间: 2014-02-18

实现ListView背景
实现ListView背景
ListView
这里实现了1、点击ListView中的Item都会改变此Item的背景2、使用Theme自定义Item选择器，也就是当选中一个item的时候，此item的背景改变
文件说明：
ListDemo.java -------Activity类
res/layout/list.xml ------布局文件
res/layout/listitem.xml ------每一个item的布局
res/drawable/addtion.png -----随便找的做，用做点击item时候设置背景的图片
res/drawable/icon.png ----随便找的图片，用于选择器
res/values/styles.xml ------风格样式表文件
ListDemo.java

--------------------------------------------

package cc.androidos.layout; 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.ArrayAdapter; 
import android.widget.ListView; 
/** 
* 
* @author Wang XinFeng 
* @version 1.0 
* @since 2009-3-24 
*/ 
public class ListDemo extends Activity 
{ 
    @Override 
    protected void onCreate( Bundle savedInstanceState ) 
    { 
        super.onCreate( savedInstanceState ); 
        //如果你设置了此项，那么就会改变listView 的选择器 
        setTheme( R.style.theme ); 
        setContentView( R.layout.list ); 
       
        final ListView lv = ( ListView ) findViewById( R.id.ListView01 ); 
        ArrayAdapter<String> ss = new ArrayAdapter<String>(this,R.layout.listitem,new String[]{"A","B"}); 
        lv.setAdapter( ss ); 
        
        lv.setOnItemClickListener( new AdapterView.OnItemClickListener(){ 
            //点击item的事件监听器 
            @Override 
            public void onItemClick( AdapterView<?> arg0, View arg1, int arg2, 
                long arg3 ) 
            { 
                //arg1实际上就是你点击的那个item的组件对象 
                //在这里直接设置它的背景 
                arg1.setBackgroundResource( R.drawable.addtion ); 
            } 
            
        } ); 
    } 
}

--------------------------------------------

res/layout/list.xml

--------------------------------------------

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
androidrientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<!-- 这里是简单的ListView -->
<ListView android:id="@+id/ListView01"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content">
</ListView>
</LinearLayout>

--------------------------------------------

res/layout/listitem.xml

<TextView android:id="@+id/TextView01"
android:layout_width="fill_parent"
android:layout_height="100px"
xmlns:android="http://schemas.android.com/apk/res/android">
</TextView>

res/values/styles.xml

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

<style name="theme" parent="android:Theme">
<!--设置ListView到整个Theme中-->
    <item name="android:listViewStyle">@style/listS</item>
</style>
<!--配置ListView 的 Theme-->
<style name="listS" parent="android:style/Widget.AbsListView">
<item name="android:listSelector">@drawable/icon</item>
</style>
</resources>

--------------------------------------------

图片放进去有点丑陋，这里仅仅做为演示（演示结果为我写的另一个例子）。

ListView背景：

点击item设置的背景：

[3] 两种保留方法

来源: 互联网发布时间: 2014-02-18

两种保存方法

暂时的

@Override
public void onSaveInstanceState(Bundle savedInstanceState)
{
  // Store UI state to the savedInstanceState.
  // This bundle will be passed to onCreate on next call.

  EditText txtName = (EditText)findViewById(R.id.txtName);
  String strName = txtName.getText().toString();

  EditText txtEmail = (EditText)findViewById(R.id.txtEmail);
  String strEmail = txtEmail.getText().toString();

  CheckBox chkTandC = (CheckBox)findViewById(R.id.chkTandC);
  boolean blnTandC = chkTandC.isChecked();

  savedInstanceState.putString("Name", strName);
  savedInstanceState.putString("Email", strEmail);
  savedInstanceState.putBoolean("TandC", blnTandC);

  super.onSaveInstanceState(savedInstanceState);
}

灰度

恢复

@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);

  // Restore UI state from the savedInstanceState.
  if (savedInstanceState != null)
  {
    String strValue = savedInstanceState.getString("Name");
    if (strValue != null)
    {
      EditText oControl = (EditText)findViewById(R.id.txtName);
      oControl.setText(strValue);
    }

    strValue = savedInstanceState.getString("Email");
    if (strValue != null)
    {
      EditText oControl = (EditText)findViewById(R.id.txtEmail);
      oControl.setText(strValue);
    }

    CheckBox chkTandC = (CheckBox)findViewById(R.id.chkTandC);
    chkTandC.setChecked(savedInstanceState.getBoolean("TandC"));
  }
}

持续的

@Override
protected void onPause()
{
  super.onPause();

  // Store values between instances here
  SharedPreferences preferences = getPreferences(MODE_PRIVATE);
  SharedPreferences.Editor editor = preferences.edit();

  // Put the values from the UI
  EditText txtName = (EditText)findViewById(R.id.txtName);
  String strName = txtName.getText().toString();

  EditText txtEmail = (EditText)findViewById(R.id.txtEmail);
  String strEmail = txtEmail.getText().toString();

  CheckBox chkTandC = (CheckBox)findViewById(R.id.chkTandC);
  boolean blnTandC = chkTandC.isChecked();

  editor.putString("Name", strName); // value to store
  editor.putString("Email", strEmail); // value to store
  editor.putBoolean("TandC", blnTandC); // value to store
  // Commit to storage
  editor.commit();
}/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
  super.onCreate(savedInstanceState);

  // Get the between instance stored values
  SharedPreferences preferences = getPreferences(MODE_PRIVATE);

  // Set the values of the UI
  EditText oControl = (EditText)findViewById(R.id.txtName);
  oControl.setText(preferences.getString("Name", null));

  oControl = (EditText)findViewById(R.id.txtEmail);
  oControl.setText(preferences.getString("Email", null));

  CheckBox chkTandC = (CheckBox)findViewById(R.id.chkTandC);
  chkTandC.setChecked(preferences.getBoolean("TandC", false));
}

前一种主要是在旋转凭以及登录信息，也就是说app关闭则保存状态小时，activity切换没有关系不影响

后一种关掉重启继续保留