系出名门Android(5) - 控件(View)之TextView, Button, ImageButton, ImageView, CheckBox

<? xml  version ="1.0"  encoding ="utf-8" ?> 
< LinearLayout  xmlns:android ="http://schemas.android.com/apk/res/android" 
         android:orientation ="vertical"  android:layout_width ="fill_parent" 
         android:layout_height ="fill_parent" > 
         
        <!--  
                TextView - 文本显示控件 
        --> 
         < TextView  android:layout_width ="fill_parent" 
                 android:layout_height ="wrap_content"  android:id ="@+id/textView"  /> 
                 
</ LinearLayout >

package com.webabcd.view; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.TextView; 

public  class _TextView  extends Activity { 

        @Override 
         protected  void onCreate(Bundle savedInstanceState) { 
                 // TODO Auto-generated method stub 
                 super.onCreate(savedInstanceState); 
                 this.setContentView(R.layout.textview); 

                 // 设置 Activity 的标题 
                setTitle( "TextView"); 
                 
                TextView txt = (TextView)  this.findViewById(R.id.textView); 
                 // 设置文本显示控件的文本内容，需要换行的话就用“\n” 
                txt.setText( "我是 TextView\n显示文字用的"); 
        } 
}

<? xml  version ="1.0"  encoding ="utf-8" ?> 
< 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:layout_width ="fill_parent" 
                 android:layout_height ="wrap_content"  android:id ="@+id/textView"  /> 
         
         <!--  
                 Button - 按钮控件 
         -->         
         < Button  android:id ="@+id/button" 
                 android:layout_width ="wrap_content"  android:layout_height ="wrap_content" > 
         </ Button > 
         
</ LinearLayout >

package com.webabcd.view; 

import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.TextView; 

public  class _Button  extends Activity { 

        @Override 
         protected  void onCreate(Bundle savedInstanceState) { 
                 // TODO Auto-generated method stub 
                 super.onCreate(savedInstanceState); 
                 this.setContentView(R.layout.button); 

                setTitle( "Button"); 
                 
                Button btn = (Button)  this.findViewById(R.id.button); 
                btn.setText( "click me"); 
                 
                 // setOnClickListener() - 响应按钮的鼠标单击事件 
                btn.setOnClickListener( new Button.OnClickListener(){ 
                        @Override 
                         public  void onClick(View v) { 
                                TextView txt = (TextView) _Button. this.findViewById(R.id.textView); 
                                txt.setText( "按钮被单击了"); 
                        } 
                }); 
        } 
}

<? xml  version ="1.0"  encoding ="utf-8" ?> 
< 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:layout_width ="fill_parent" 
                 android:layout_height ="wrap_content"  android:id ="@+id/textView"  /> 
         
        <!--  
                ImageButton - 图片按钮控件 
        -->         
         < ImageButton  android:id ="@+id/imageButton" 
                 android:layout_width ="wrap_content"  android:layout_height ="wrap_content" > 
         </ ImageButton > 
         
</ LinearLayout >

package com.webabcd.view; 

import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.ImageButton; 
import android.widget.TextView; 

public  class _ImageButton  extends Activity { 

        @Override 
         protected  void onCreate(Bundle savedInstanceState) { 
                 // TODO Auto-generated method stub 
                 super.onCreate(savedInstanceState); 
                 this.setContentView(R.layout.imagebutton); 

                setTitle( "ImageButton"); 
                 
                ImageButton imgButton = (ImageButton)  this.findViewById(R.id.imageButton); 
                 // 设置图片按钮的背景 
                imgButton.setBackgroundResource(R.drawable.icon01); 
                 
                 // setOnClickListener() - 响应图片按钮的鼠标单击事件 
                imgButton.setOnClickListener( new Button.OnClickListener(){ 
                        @Override 
                         public  void onClick(View v) { 
                                TextView txt = (TextView) _ImageButton. this.findViewById(R.id.textView); 
                                txt.setText( "图片按钮被单击了"); 
                        } 
                }); 
        } 
}

<? xml  version ="1.0"  encoding ="utf-8" ?> 
< LinearLayout  xmlns:android ="http://schemas.android.com/apk/res/android" 
         android:orientation ="vertical"  android:layout_width ="fill_parent" 
         android:layout_height ="fill_parent" > 
         
        <!--  
                ImageView - 图片显示控件 
        --> 
         < ImageView  android:id ="@+id/imageView"  android:layout_width ="wrap_content" 
                 android:layout_height ="wrap_content" > </ ImageView > 
                 
</ LinearLayout >

package com.webabcd.view; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.ImageView; 

public  class _ImageView  extends Activity { 

        @Override 
         protected  void onCreate(Bundle savedInstanceState) { 
                 // TODO Auto-generated method stub 
                 super.onCreate(savedInstanceState); 
                 this.setContentView(R.layout.imageview); 

                setTitle( "ImageView"); 
                 
                ImageView imgView = (ImageView)  this.findViewById(R.id.imageView); 
                 // 指定需要显示的图片 
                imgView.setBackgroundResource(R.drawable.icon01); 
        } 
}

<? xml  version ="1.0"  encoding ="utf-8" ?> 
< 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:layout_width ="fill_parent" 
                 android:layout_height ="wrap_content"  android:id ="@+id/textView"  /> 
                 
        <!--  
                CheckBox - 复选框控件 
        --> 
         < CheckBox  android:text ="CheckBox01"  android:id ="@+id/chk1" 
                 android:layout_width ="wrap_content"  android:layout_height ="wrap_content" > </ CheckBox > 
         < CheckBox  android:text ="CheckBox02"  android:id ="@+id/chk2" 
                 android:layout_width ="wrap_content"  android:layout_height ="wrap_content" > </ CheckBox > 
         < CheckBox  android:text ="CheckBox03"  android:id ="@+id/chk3" 
                 android:layout_width ="wrap_content"  android:layout_height ="wrap_content" > </ CheckBox > 
                 
</ LinearLayout >

package com.webabcd.view; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.CheckBox; 
import android.widget.CompoundButton; 
import android.widget.TextView; 

public  class _CheckBox  extends Activity { 

        @Override 
         protected  void onCreate(Bundle savedInstanceState) { 
                 // TODO Auto-generated method stub 
                 super.onCreate(savedInstanceState); 
                 this.setContentView(R.layout.checkbox); 

                setTitle( "CheckBox"); 
                 
                CheckBox chk = (CheckBox)  this.findViewById(R.id.chk1); 
                 // setOnCheckedChangeListener() - 响应复选框的选中状态改变事件 
                chk.setOnCheckedChangeListener( new CompoundButton.OnCheckedChangeListener() { 
                        @Override 
                         public  void onCheckedChanged(CompoundButton buttonView,  boolean isChecked) { 
                                TextView txt = (TextView) _CheckBox. this.findViewById(R.id.textView); 
                                txt.setText( "CheckBox01 的选中状态：" + String.valueOf(isChecked));                                 
                        } 
                }); 
        } 
}

<? xml  version ="1.0"  encoding ="utf-8" ?> 
< 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:layout_width ="fill_parent" 
                 android:layout_height ="wrap_content"  android:id ="@+id/textView"  /> 
                 
        <!--  
                RadioButton - 单选框控件 
                RadioGroup - 对其内的单选框控件做分组 
                        checkedButton - 指定组内被选中的单选框的 ID 
        --> 
         < RadioGroup  android:id ="@+id/radioGroup" 
                 android:layout_width ="fill_parent"  android:layout_height ="fill_parent" 
                 android:checkedButton ="@+id/rad3"  android:orientation ="horizontal" 
                 android:gravity ="center_vertical|center_horizontal" > 
                 < RadioButton  android:text ="rad1"  android:id ="@+id/rad1" 
                         android:layout_width ="wrap_content"  android:layout_height ="wrap_content" > </ RadioButton > 
                 < RadioButton  android:text ="rad2"  android:id ="@+id/rad2" 
                         android:layout_width ="wrap_content"  android:layout_height ="wrap_content" > </ RadioButton > 
                 < RadioButton  android:text ="rad3"  android:id ="@+id/rad3" 
                         android:layout_width ="wrap_content"  android:layout_height ="wrap_content" > </ RadioButton > 
         </ RadioGroup > 
         
</ LinearLayout >

package com.webabcd.view; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.RadioButton; 
import android.widget.RadioGroup; 
import android.widget.TextView; 

public  class _RadioButton  extends Activity { 

        @Override 
         protected  void onCreate(Bundle savedInstanceState) { 
                 // TODO Auto-generated method stub 
                 super.onCreate(savedInstanceState); 
                 this.setContentView(R.layout.radiobutton); 

                setTitle( "RadioButton"); 
                 
                RadioGroup group = (RadioGroup)  this.findViewById(R.id.radioGroup); 
                 // setOnCheckedChangeListener() - 响应单选框组内的选中项发生变化时的事件 
                group.setOnCheckedChangeListener( new RadioGroup.OnCheckedChangeListener() {         
                        @Override 
                         public  void onCheckedChanged(RadioGroup group,  int checkedId) { 
                                TextView txt = (TextView) _RadioButton. this.findViewById(R.id.textView); 
                                txt.setText(((RadioButton)findViewById(checkedId)).getText() +  " 被选中");                                         
                        } 
                });    
        } 
}

<? xml  version ="1.0"  encoding ="utf-8" ?> 
< LinearLayout  xmlns:android ="http://schemas.android.com/apk/res/android" 
         android:orientation ="vertical"  android:layout_width ="fill_parent" 
         android:layout_height ="fill_parent" > 
         
        <!--  
                AnalogClock - 钟表（带表盘的那种）控件 
        --> 
         < AnalogClock  android:id ="@+id/analogClock" 
                 android:layout_width ="wrap_content"  android:layout_height ="wrap_content" > 
         </ AnalogClock > 
         
</ LinearLayout >

package com.webabcd.view; 

import android.app.Activity; 
import android.os.Bundle; 

public  class _AnalogClock  extends Activity { 

        @Override 
         protected  void onCreate(Bundle savedInstanceState) { 
                 // TODO Auto-generated method stub 
                 super.onCreate(savedInstanceState); 
                 this.setContentView(R.layout.analogclcok); 

                setTitle( "AnalogClock"); 
        } 
}

<? xml  version ="1.0"  encoding ="utf-8" ?> 
< LinearLayout  xmlns:android ="http://schemas.android.com/apk/res/android" 
         android:orientation ="vertical"  android:layout_width ="fill_parent" 
         android:layout_height ="fill_parent" > 
         
        <!--  
                DigitalClock - 电子表控件 
        --> 
         < DigitalClock  android:id ="@+id/digitalClock" 
                 android:layout_width ="wrap_content"  android:layout_height ="wrap_content" > 
         </ DigitalClock > 
         
</ LinearLayout >

package com.webabcd.view; 

import android.app.Activity; 
import android.os.Bundle; 

public  class _DigitalClock  extends Activity { 

        @Override 
         protected  void onCreate(Bundle savedInstanceState) { 
                 // TODO Auto-generated method stub 
                 super.onCreate(savedInstanceState); 
                 this.setContentView(R.layout.digitalclcok); 

                setTitle( "DigitalClcok"); 
        } 
}