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

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

<?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

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

<?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

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

<?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

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

<?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

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

<?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

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

<?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

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

<?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

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

<?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

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"); }}