1.文本框TextView
TextView的作用是用来显示一个文本框
,下面我用两种方式为大家呈现TextView, 第一种是通过xml布局文件呈现 ,第二种是通过代码来呈现,由此可见Android 的界面开发真的是非常灵活。
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- public class TextViewActivity extends Activity {
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- setContentView(R.layout.textview);
-
- LinearLayout ll = (LinearLayout) findViewById(R.id.textviewll);
- TextView textView = new TextView(this);
-
- textView.setText("从代码中添加一个TextView");
-
- textView.setTextColor(Color.WHITE);
-
- textView.setTextSize(18);
-
- textView.setBackgroundColor(Color.BLUE);
-
- textView.setGravity(Gravity.CENTER_VERTICAL|Gravity.CENTER_HORIZONTAL);
-
- ll.addView(textView);
-
- super.onCreate(savedInstanceState);
- }
- }
public class TextViewActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { setContentView(R.layout.textview); LinearLayout ll = (LinearLayout) findViewById(R.id.textviewll); TextView textView = new TextView(this); //设置显示文字 textView.setText("从代码中添加一个TextView"); //设置显示颜色 textView.setTextColor(Color.WHITE); //设置显示字体大小 textView.setTextSize(18); //设置显示背景颜色 textView.setBackgroundColor(Color.BLUE); //设置锚点位置 textView.setGravity(Gravity.CENTER_VERTICAL|Gravity.CENTER_HORIZONTAL); //把这个view加入到布局当中 ll.addView(textView); super.onCreate(savedInstanceState); } }
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- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:id="@+id/textviewll"
- android:orientation="vertical" android:layout_width="fill_parent"
- android:layout_height="fill_parent">
- <TextView android:id="@+id/textView0"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:textColor="#000000"
- android:textSize="18dip"
- android:background="#00FF00"
- android:text="@string/textView"
- android:gravity="center_vertical|center_horizontal"
- />
- </LinearLayout>
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/textviewll" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:id="@+id/textView0" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textColor="#000000" android:textSize="18dip" android:background="#00FF00" android:text="@string/textView" android:gravity="center_vertical|center_horizontal" /> </LinearLayout>
2.网页框WebView
WebView可以实现 类似web的网页 的系统控件 最主要的是可以使用html代码,如访问网页等。
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- public class WebViewActivity extends Activity {
- WebView webView = null;
- static final String MIME_TYPE = "text/html";
- static final String ENCODING = "utf-8";
-
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- setContentView(R.layout.webview);
-
- webView = (WebView) findViewById(R.id.webview);
- webView.loadDataWithBaseURL(null,"<a href='http://blog.csdn.net/xys289187120'>欢迎访问雨松MOMO的博客</a>", MIME_TYPE, ENCODING, null);
- super.onCreate(savedInstanceState);
- }
- }
public class WebViewActivity extends Activity { WebView webView = null; static final String MIME_TYPE = "text/html"; static final String ENCODING = "utf-8"; @Override protected void onCreate(Bundle savedInstanceState) { setContentView(R.layout.webview); webView = (WebView) findViewById(R.id.webview); webView.loadDataWithBaseURL(null,"<a href='http://blog.csdn.net/xys289187120'>欢迎访问雨松MOMO的博客</a>", MIME_TYPE, ENCODING, null); super.onCreate(savedInstanceState); } }
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- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:id="@+id/textviewll"
- 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:textColor="#000000"
- android:textSize="18dip"
- android:background="#00FF00"
- android:text="网页框WebView测试"
- android:gravity="center_vertical|center_horizontal"
- />
- <WebView android:id="@+id/webview"
- android:layout_height="wrap_content"
- android:layout_width="fill_parent"/>
- </LinearLayout>
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/textviewll" 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:textColor="#000000" android:textSize="18dip" android:background="#00FF00" android:text="网页框WebView测试" android:gravity="center_vertical|center_horizontal" /> <WebView android:id="@+id/webview" android:layout_height="wrap_content" android:layout_width="fill_parent"/> </LinearLayout>
3.Menu菜单
Menu菜单在android系统控件中真的很具有特色 点击以后会悬浮出一个菜单在次点击菜单则会消失,今天我只是简单的介绍一下系统的Menu菜单, 其实Menu菜单可以做出非常好看的效果,比如半透明 自定义按钮图片等等,后面我会详细的介绍menu菜单。
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- public class MenuActivity extends Activity {
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- setContentView(R.layout.menuview);
- super.onCreate(savedInstanceState);
- }
-
- @Override
- public boolean onCreateOptionsMenu(Menu menu) {
- menu.add(0, 0, Menu.NONE, "菜单1").setIcon(R.drawable.icon);
- menu.add(0, 1, Menu.NONE, "菜单2").setIcon(R.drawable.icon);
- menu.add(0, 2, Menu.NONE, "菜单3").setIcon(R.drawable.icon);
- menu.add(0, 3, Menu.NONE, "菜单4").setIcon(R.drawable.icon);
- menu.add(0, 4, Menu.NONE, "菜单5").setIcon(R.drawable.icon);
- menu.add(0, 5, Menu.NONE, "菜单6").setIcon(R.drawable.icon);
- return super.onCreateOptionsMenu(menu);
- }
-
- @Override
- public boolean onOptionsItemSelected(MenuItem item) {
- Dialog(item.getItemId());
- return super.onOptionsItemSelected(item);
- }
-
- private void Dialog(int message) {
- new AlertDialog.Builder(this).setMessage(
- "您单击第【" + message + "】项Menu菜单项.").show();
- }
- }
public class MenuActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { setContentView(R.layout.menuview); super.onCreate(savedInstanceState); } @Override public boolean onCreateOptionsMenu(Menu menu) { menu.add(0, 0, Menu.NONE, "菜单1").setIcon(R.drawable.icon); menu.add(0, 1, Menu.NONE, "菜单2").setIcon(R.drawable.icon); menu.add(0, 2, Menu.NONE, "菜单3").setIcon(R.drawable.icon); menu.add(0, 3, Menu.NONE, "菜单4").setIcon(R.drawable.icon); menu.add(0, 4, Menu.NONE, "菜单5").setIcon(R.drawable.icon); menu.add(0, 5, Menu.NONE, "菜单6").setIcon(R.drawable.icon); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { Dialog(item.getItemId()); return super.onOptionsItemSelected(item); } private void Dialog(int message) { new AlertDialog.Builder(this).setMessage( "您单击第【" + message + "】项Menu菜单项.").show(); } }
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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:textColor="#000000"
- android:textSize="18dip"
- android:background="#00FF00"
- android:text="Menu菜单测试"
- android:gravity="center_vertical|center_horizontal"
- />
- </LinearLayout>
<?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:textColor="#000000" android:textSize="18dip" android:background="#00FF00" android:text="Menu菜单测试" android:gravity="center_vertical|center_horizontal" /> </LinearLayout>
4.按钮Button
第一个是绘制系统字的button, 第二个是带图片的button 。
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- public class ButtonActivity extends Activity {
-
- Context mContext = null;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- setContentView(R.layout.buttonview);
- mContext = this;
-
-
- Button button0 = (Button)findViewById(R.id.buttonview0);
-
-
- button0.setTextColor(Color.BLUE);
-
- button0.setTextSize(30);
-
-
- button0.setOnClickListener(new OnClickListener() {
-
- @Override
- public void onClick(View arg0) {
- Toast.makeText(ButtonActivity.this, "您点击了‘这是一个按钮’", Toast.LENGTH_LONG).show();
-
- }
- });
-
-
- ImageButton button1 = (ImageButton)findViewById(R.id.buttonview1);
-
- button1.setOnClickListener(new OnClickListener() {
-
- @Override
- public void onClick(View arg0) {
- Toast.makeText(ButtonActivity.this, "您点击了一个带图片的按钮", Toast.LENGTH_LONG).show();
-
- }
- });
- super.onCreate(savedInstanceState);
- }
- }
public class ButtonActivity extends Activity { Context mContext = null; @Override protected void onCreate(Bundle savedInstanceState) { setContentView(R.layout.buttonview); mContext = this; //普通按钮 Button button0 = (Button)findViewById(R.id.buttonview0); //设置按钮文字颜色 button0.setTextColor(Color.BLUE); //设置按钮文字大小 button0.setTextSize(30); //设置按钮监听 点击事件 button0.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { Toast.makeText(ButtonActivity.this, "您点击了‘这是一个按钮’", Toast.LENGTH_LONG).show(); } }); //带图片的按钮 ImageButton button1 = (ImageButton)findViewById(R.id.buttonview1); //设置按钮监听 点击事件 button1.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { Toast.makeText(ButtonActivity.this, "您点击了一个带图片的按钮", Toast.LENGTH_LONG).show(); } }); super.onCreate(savedInstanceState); } }
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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:textColor="#000000"
- android:textSize="18dip"
- android:background="#00FF00"
- android:text="Button按钮测试"
- android:gravity="center_vertical|center_horizontal"
- />
- <Button
- android:id="@+id/buttonview0"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="这是一个按钮"
- />
- <ImageButton
- android:id="@+id/buttonview1"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:src="@drawable/icon"
- />
- </LinearLayout>
<?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:textColor="#000000" android:textSize="18dip" android:background="#00FF00" android:text="Button按钮测试" android:gravity="center_vertical|center_horizontal" /> <Button android:id="@+id/buttonview0" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="这是一个按钮" /> <ImageButton android:id="@+id/buttonview1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:src="@drawable/icon" /> </LinearLayout>
5.编辑框EditView
编辑框在实际开发中用到的非常普遍 比如登录 输入账号 密码 等等。
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- public class EditTextActivity extends Activity {
-
- Context mContext = null;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- setContentView(R.layout.editview);
- mContext = this;
-
- final EditText editText0 = (EditText)findViewById(R.id.editview0);
-
- final EditText editText1 = (EditText)findViewById(R.id.editview1);
-
-
- Button button = (Button)findViewById(R.id.editbutton0);
-
- button.setOnClickListener(new OnClickListener() {
-
- @Override
- public void onClick(View arg0) {
- String username = editText0.getText().toString();
- String password = editText1.getText().toString();
- Toast.makeText(EditTextActivity.this, "用户名:"+username +"密码:"+ password, Toast.LENGTH_LONG).show();
- }
- });
- super.onCreate(savedInstanceState);
- }
- }
public class EditTextActivity extends Activity { Context mContext = null; @Override protected void onCreate(Bundle savedInstanceState) { setContentView(R.layout.editview); mContext = this; //帐号 final EditText editText0 = (EditText)findViewById(R.id.editview0); //密码 final EditText editText1 = (EditText)findViewById(R.id.editview1); //确认按钮 Button button = (Button)findViewById(R.id.editbutton0); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { String username = editText0.getText().toString(); String password = editText1.getText().toString(); Toast.makeText(EditTextActivity.this, "用户名:"+username +"密码:"+ password, Toast.LENGTH_LONG).show(); } }); super.onCreate(savedInstanceState); } }
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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:textColor="#000000"
- android:textSize="18dip"
- android:background="#00FF00"
- android:text="EditText编辑框测试"
- android:gravity="center_vertical|center_horizontal"
- />
- <EditText
- android:id="@+id/editview0"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:hint="请输入帐号"
- android:phoneNumber="true"
- />
-
- <EditText
- android:id="@+id/editview1"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:hint="请输入密码"
- android:password="true"
- />
- <Button
- android:id="@+id/editbutton0"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="确定"
- />
- </LinearLayout>
<?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:textColor="#000000" android:textSize="18dip" android:background="#00FF00" android:text="EditText编辑框测试" android:gravity="center_vertical|center_horizontal" /> <EditText android:id="@+id/editview0" android:layout_width="fill_parent" android:layout_height="wrap_content" android:hint="请输入帐号" android:phoneNumber="true" /> <EditText android:id="@+id/editview1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:hint="请输入密码" android:password="true" /> <Button android:id="@+id/editbutton0" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="确定" /> </LinearLayout>
6.单项选择
使用RadioGroup 包住若干个RadioButton 来实现单项选择。监听每一个
RadioGroup 就可以知道那个单选组中的第一个ID被按下。
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- public class RadioActivity extends Activity {
-
- Context mContext = null;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- setContentView(R.layout.radioview);
- mContext = this;
-
- RadioGroup radioGroup = (RadioGroup)findViewById(R.id.radion0);
-
-
- final RadioButton radioButton0 = (RadioButton)findViewById(R.id.radionButton0);
- final RadioButton radioButton1 = (RadioButton)findViewById(R.id.radionButton1);
- final RadioButton radioButton2 = (RadioButton)findViewById(R.id.radionButton2);
-
- radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
-
- @Override
- public void onCheckedChanged(RadioGroup arg0, int checkID) {
- if(radioButton0.getId() == checkID) {
- Toast.makeText(RadioActivity.this, "您选中了第一组" + radioButton0.getText(), Toast.LENGTH_LONG).show();
- }else if(radioButton1.getId() == checkID) {
- Toast.makeText(RadioActivity.this, "您选中了第一组" + radioButton1.getText(), Toast.LENGTH_LONG).show();
- }else if(radioButton2.getId() == checkID) {
- Toast.makeText(RadioActivity.this, "您选中了第一组" + radioButton2.getText(), Toast.LENGTH_LONG).show();
- }
- }
- });
-
- RadioGroup radioGroup0 = (RadioGroup)findViewById(R.id.radion1);
-
-
- final RadioButton radioButton3 = (RadioButton)findViewById(R.id.radionButton3);
- final RadioButton radioButton4 = (RadioButton)findViewById(R.id.radionButton4);
- final RadioButton radioButton5 = (RadioButton)findViewById(R.id.radionButton5);
-
- radioGroup0.setOnCheckedChangeListener(new OnCheckedChangeListener() {
-
- @Override
- public void onCheckedChanged(RadioGroup arg0, int checkID) {
- if(radioButton3.getId() == checkID) {
- Toast.makeText(RadioActivity.this, "您选中了第二组" + radioButton3.getText(), Toast.LENGTH_LONG).show();
- }else if(radioButton4.getId() == checkID) {
- Toast.makeText(RadioActivity.this, "您选中了第二组" + radioButton4.getText(), Toast.LENGTH_LONG).show();
- }else if(radioButton5.getId() == checkID) {
- Toast.makeText(RadioActivity.this, "您选中了第二组" + radioButton5.getText(), Toast.LENGTH_LONG).show();
- }
- }
- });
- super.onCreate(savedInstanceState);
- }
- }
public class RadioActivity extends Activity { Context mContext = null; @Override protected void onCreate(Bundle savedInstanceState) { setContentView(R.layout.radioview); mContext = this; //单选组(只有在一个组中的按钮可以单选) RadioGroup radioGroup = (RadioGroup)findViewById(R.id.radion0); //单选按钮(第一组) final RadioButton radioButton0 = (RadioButton)findViewById(R.id.radionButton0); final RadioButton radioButton1 = (RadioButton)findViewById(R.id.radionButton1); final RadioButton radioButton2 = (RadioButton)findViewById(R.id.radionButton2); radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup arg0, int checkID) { if(radioButton0.getId() == checkID) { Toast.makeText(RadioActivity.this, "您选中了第一组" + radioButton0.getText(), Toast.LENGTH_LONG).show(); }else if(radioButton1.getId() == checkID) { Toast.makeText(RadioActivity.this, "您选中了第一组" + radioButton1.getText(), Toast.LENGTH_LONG).show(); }else if(radioButton2.getId() == checkID) { Toast.makeText(RadioActivity.this, "您选中了第一组" + radioButton2.getText(), Toast.LENGTH_LONG).show(); } } }); RadioGroup radioGroup0 = (RadioGroup)findViewById(R.id.radion1); //单选按钮(第二组) final RadioButton radioButton3 = (RadioButton)findViewById(R.id.radionButton3); final RadioButton radioButton4 = (RadioButton)findViewById(R.id.radionButton4); final RadioButton radioButton5 = (RadioButton)findViewById(R.id.radionButton5); radioGroup0.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup arg0, int checkID) { if(radioButton3.getId() == checkID) { Toast.makeText(RadioActivity.this, "您选中了第二组" + radioButton3.getText(), Toast.LENGTH_LONG).show(); }else if(radioButton4.getId() == checkID) { Toast.makeText(RadioActivity.this, "您选中了第二组" + radioButton4.getText(), Toast.LENGTH_LONG).show(); }else if(radioButton5.getId() == checkID) { Toast.makeText(RadioActivity.this, "您选中了第二组" + radioButton5.getText(), Toast.LENGTH_LONG).show(); } } }); super.onCreate(savedInstanceState); } }
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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:textColor="#000000"
- android:textSize="18dip"
- android:background="#00FF00"
- android:text="单项选择测试第一组"
- android:gravity="center_vertical|center_horizontal"
- />
- <RadioGroup
- android:id="@+id/radion0"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content" >
- <RadioButton
- android:id="@+id/radionButton0"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="item0"
- />
- <RadioButton
- android:id="@+id/radionButton1"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="item1"
- />
- <RadioButton
- android:id="@+id/radionButton2"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="item2"
- />
- </RadioGroup>
-
- <TextView android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:textColor="#000000"
- android:textSize="18dip"
- android:background="#00FF00"
- android:text="单项选择测试第二组"
- android:gravity="center_vertical|center_horizontal"
- />
- <RadioGroup
- android:id="@+id/radion1"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content" >
- <RadioButton
- android:id="@+id/radionButton3"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="item3"
- />
- <RadioButton
- android:id="@+id/radionButton4"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="item4"
- />
- <RadioButton
- android:id="@+id/radionButton5"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="item5"
- />
- </RadioGroup>
- </LinearLayout>
<?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:textColor="#000000" android:textSize="18dip" android:background="#00FF00" android:text="单项选择测试第一组" android:gravity="center_vertical|center_horizontal" /> <RadioGroup android:id="@+id/radion0" android:layout_width="fill_parent" android:layout_height="wrap_content" > <RadioButton android:id="@+id/radionButton0" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="item0" /> <RadioButton android:id="@+id/radionButton1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="item1" /> <RadioButton android:id="@+id/radionButton2" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="item2" /> </RadioGroup> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:textColor="#000000" android:textSize="18dip" android:background="#00FF00" android:text="单项选择测试第二组" android:gravity="center_vertical|center_horizontal" /> <RadioGroup android:id="@+id/radion1" android:layout_width="fill_parent" android:layout_height="wrap_content" > <RadioButton android:id="@+id/radionButton3" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="item3" /> <RadioButton android:id="@+id/radionButton4" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="item4" /> <RadioButton android:id="@+id/radionButton5" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="item5" /> </RadioGroup> </LinearLayout>
7.多项选择
使用系统控件Checkbox 监听每一个checkbox 的点击事件就可以确定那几个选项被选择了。
view plain copy to clipboard print ?
- public class CheckboxActivity extends Activity {
-
-
- ArrayList <String>item = new ArrayList<String>();
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- setContentView(R.layout.checkboxview);
-
- CheckBox checkbox0 = (CheckBox)findViewById(R.id.checkboxview0);
- CheckBox checkbox1 = (CheckBox)findViewById(R.id.checkboxview1);
- CheckBox checkbox2 = (CheckBox)findViewById(R.id.checkboxview2);
- CheckBox checkbox3 = (CheckBox)findViewById(R.id.checkboxview3);
- Button button = (Button)findViewById(R.id.checkboxbutton);
-
- checkbox0.setOnCheckedChangeListener(new OnCheckedChangeListener() {
-
- @Override
- public void onCheckedChanged(CompoundButton button, boolean arg1) {
- String str = button.getText().toString();
- if (button.isChecked()) {
- item.add(str);
- } else {
- item.remove(str);
- }
-
- }
- });
-
- checkbox1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
-
- @Override
- public void onCheckedChanged(CompoundButton button, boolean arg1) {
- String str = button.getText().toString();
- if (button.isChecked()) {
- item.add(str);
- } else {
- item.remove(str);
- }
-
- }
- });
- checkbox2.setOnCheckedChangeListener(new OnCheckedChangeListener() {
-
- @Override
- public void onCheckedChanged(CompoundButton button, boolean arg1) {
- String str = button.getText().toString();
- if (button.isChecked()) {
- item.add(str);
- } else {
- item.remove(str);
- }
-
- }
- });
- checkbox3.setOnCheckedChangeListener(new OnCheckedChangeListener() {
-
- @Override
- public void onCheckedChanged(CompoundButton button, boolean arg1) {
- String str = button.getText().toString();
- if (button.isChecked()) {
- item.add(str);
- } else {
- item.remove(str);
- }
-
- }
- });
-
- button.setOnClickListener(new OnClickListener() {
-
- @Override
- public void onClick(View arg0) {
- String str = item.toString();
- Toast.makeText(CheckboxActivity.this, "您选中了" + str, Toast.LENGTH_LONG).show();
-
- }
- });
- super.onCreate(savedInstanceState);
- }
- }
public class CheckboxActivity extends Activity { //用来储存选中的内容 ArrayList <String>item = new ArrayList<String>(); @Override protected void onCreate(Bundle savedInstanceState) { setContentView(R.layout.checkboxview); CheckBox checkbox0 = (CheckBox)findViewById(R.id.checkboxview0); CheckBox checkbox1 = (CheckBox)findViewById(R.id.checkboxview1); CheckBox checkbox2 = (CheckBox)findViewById(R.id.checkboxview2); CheckBox checkbox3 = (CheckBox)findViewById(R.id.checkboxview3); Button button = (Button)findViewById(R.id.checkboxbutton); //对checkbox进行监听 checkbox0.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton button, boolean arg1) { String str = button.getText().toString(); if (button.isChecked()) { item.add(str); } else { item.remove(str); } } }); checkbox1.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton button, boolean arg1) { String str = button.getText().toString(); if (button.isChecked()) { item.add(str); } else { item.remove(str); } } }); checkbox2.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton button, boolean arg1) { String str = button.getText().toString(); if (button.isChecked()) { item.add(str); } else { item.remove(str); } } }); checkbox3.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton button, boolean arg1) { String str = button.getText().toString(); if (button.isChecked()) { item.add(str); } else { item.remove(str); } } }); button.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { String str = item.toString(); Toast.makeText(CheckboxActivity.this, "您选中了" + str, Toast.LENGTH_LONG).show(); } }); super.onCreate(savedInstanceState); } }
view plain copy to clipboard print ?
- <?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:textColor="#000000"
- android:textSize="18dip"
- android:background="#00FF00"
- android:text="多项选择测试"
- android:gravity="center_vertical|center_horizontal"
- />
- <CheckBox
- android:id="@+id/checkboxview0"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="item0"
- />
- <CheckBox
- android:id="@+id/checkboxview1"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="item1"
- />
- <CheckBox
- android:id="@+id/checkboxview2"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="item2"
- />
- <CheckBox
- android:id="@+id/checkboxview3"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="item3"
- />
- <Button
- android:id="@+id/checkboxbutton"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="确定"
- />
- </LinearLayout>