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

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系出名门Android(5) – 控件(View)之TextView, Button, ImageButton, ImageView, CheckBox, RadioButton, AnalogClock, DigitalClock

作者：webabcd

介绍
在 Android 中使用各种控件(View)

• TextView - 文本显示控件
• Button - 按钮控件
• ImageButton - 图片按钮控件
• ImageView - 图片显示控件
• CheckBox - 复选框控件
• RadioButton - 单选框控件
• AnalogClock - 钟表（带表盘的那种）控件
• DigitalClock - 电子表控件

1、TextView 的 Demo
textview.xml

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<?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>

_TextView.java

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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"); } }

2、Button 的 Demo
button.xml

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<?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>

_Button.java

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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"); } }); } }

3、ImageButton 的 Demo
imagebutton.xml

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<?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>

_ImageButton.java

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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"); } }); } }

4、ImageView 的 Demo
imageview.xml

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<?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>

_ImageView.java

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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); } }

5、CheckBox 的 Demo
checkbox.xml

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<?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>

_CheckBox.java

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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)); } }); } }

6、RadioButton 的 Demo
radiobutton.xml

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<?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>

_RadioButton.java

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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"); } }); } }

7、AnalogClock 的 Demo
analogclock.xml

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<?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>

_AnalogClock.java

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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"); } }

8、DigitalClock 的 Demo
digitalclock.xml

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<?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>

_DigitalClock.java

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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"); } }

OK

本文出自 “webabcd” 博客，请务必保留此出处http://webabcd.blog.51cto.com/1787395/342055

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转载地址：http://disanji.net/2010/12/26/famous-android-5-view-textview-button-imagebutton-imageview-checkbox/