Android学习笔记-常用控件

单选按钮 Radio

        <RadioGroup              android:id="@+id/genderGroup"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:orientation="vertical">             <RadioButton                  android:id="@+id/femaleButton"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:text="@string/female"/>                          <RadioButton                  android:id="@+id/maleButton"                 android:layout_width="wrap_content"                 android:layout_height="wrap_content"                 android:text="@string/male"/>         </RadioGroup>

genderGroup = (RadioGroup) findViewById(R.id.genderGroup);	maleButton = (RadioButton) findViewById(R.id.maleButton);	femaleButton = (RadioButton) findViewById(R.id.femaleButton);	//...	genderGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {	@Override	public void onCheckedChanged(RadioGroup group, int checkedId) {	// TODO Auto-generated method stub	if (femaleButton.getId() == checkedId) {	System.out.println("female");	Toast.makeText(MainActivity.this, "female",	Toast.LENGTH_SHORT).show();	} else if (maleButton.getId() == checkedId) {	System.out.println("female");	Toast.makeText(MainActivity.this, "male",	Toast.LENGTH_SHORT).show();	}	}	});

多选 CheckBox

        <CheckBox              android:id="@+id/swim"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_below="@id/genderGroup"             android:text="@string/swim"/>                  <CheckBox              android:id="@+id/read"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_below="@id/swim"             android:text="@string/read"/>                  <CheckBox              android:id="@+id/run"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:layout_below="@id/read"             android:text="@string/run"/>

swimBox = (CheckBox) findViewById(R.id.swim);	runBox = (CheckBox) findViewById(R.id.run);	readBox = (CheckBox) findViewById(R.id.read);	//...	swimBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {	@Override	public void onCheckedChanged(CompoundButton buttonView,	boolean isChecked) {	// TODO Auto-generated method stub	if (isChecked) {	System.out.println("Swim is checked");	} else {	System.out.println("Swim is unchecked");	}	}	});	readBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {	@Override	public void onCheckedChanged(CompoundButton buttonView,	boolean isChecked) {	// TODO Auto-generated method stub	if (isChecked) {	System.out.println("Read is checked");	} else {	System.out.println("Read is unchecked");	}	}	});	runBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {	@Override	public void onCheckedChanged(CompoundButton buttonView,	boolean isChecked) {	// TODO Auto-generated method stub	if (isChecked) {	System.out.println("Run is checked");	} else {	System.out.println("Run is unchecked");	}	}	});	}

进度条 ProgressBar

<ProgressBar      android:id="@+id/firstBar"          android:layout_width="200dp"     android:layout_height="wrap_content"     android:visibility="gone"/> <ProgressBar      android:id="@+id/secondBar"          android:layout_width="200dp"     android:layout_height="wrap_content"     android:layout_below="@id/firstBar"     android:visibility="gone"/> <Button android:id="@+id/myButton"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_below="@id/secondBar"     android:text="开始"/>

public class MainActivity extends ActionBarActivity {	private ProgressBar firstBar = null;	private ProgressBar secondBar = null;	private Button myButon = null;	private int i = 0;	@Override	protected void onCreate(Bundle savedInstanceState) {	super.onCreate(savedInstanceState);	setContentView(R.layout.activity_main);	firstBar = (ProgressBar) findViewById(R.id.firstBar);	secondBar = (ProgressBar) findViewById(R.id.secondBar);	myButon = (Button) findViewById(R.id.myButton);	myButon.setOnClickListener(new ButtonListener());	}	class ButtonListener implements OnClickListener{	@Override	public void onClick(View v) {	if (i == 0) {	firstBar.setVisibility(View.VISIBLE);	secondBar.setVisibility(View.VISIBLE);	}else if (i < firstBar.getMax()) {	//设置朱进度条的值	firstBar.setProgress(i);	//设置第二进度条的值	secondBar.setSecondaryProgress(i + 10);	//默认的进度条无法显示进行的状态	//secondBar.setProgress(i);	}else {	firstBar.setVisibility(View.GONE);	secondBar.setVisibility(View.GONE);	}	i = i + 10;	}	} }

列表 ListView

main.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="vertical" >          <LinearLayout          android:id="@+id/ListLinearLayout"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:orientation="vertical">                  <ListView android:id="@+id/android:list"             android:layout_width="fill_parent"             android:layout_height="wrap_content"             android:drawSelectorOnTop="false"             android:scrollbars="vertical"/>     </LinearLayout> </LinearLayout>

user.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:orientation="horizontal" >     <TextView          android:id="@+id/user_name"         android:layout_width="180dip"         android:layout_height="30dip"         android:textSize="10pt"         android:singleLine="true"/>    <TextView          android:id="@+id/user_ip"         android:layout_width="fill_parent"         android:layout_height="fill_parent"         android:textSize="10pt"         android:gravity="right"/>  </LinearLayout>

MainActivity.java

public class MainActivity extends ListActivity{	@Override	protected void onCreate(Bundle savedInstanceState) {	super.onCreate(savedInstanceState);	setContentView(R.layout.main);	ArrayList<HashMap<String, String>> list = new ArrayList<HashMap<String,String>>();	HashMap<String, String> map1 = new HashMap<String, String>();	HashMap<String, String> map2 = new HashMap<String, String>();	HashMap<String, String> map3 = new HashMap<String, String>();	map1.put("user_name", "admin1");	map1.put("user_ip", "192.168.24.214");	map2.put("user_name", "admin2");	map2.put("user_ip", "192.168.24.215");	map3.put("user_name", "admin3");	map3.put("user_ip", "192.168.24.216");	list.add(map1);	list.add(map2);	list.add(map3);	SimpleAdapter listAdapter = new SimpleAdapter(this, list, R.layout.user, new String[]{"user_name", "user_ip"}, new int[]{R.id.user_ip, R.id.user_name});	setListAdapter(listAdapter);	}	@Override	protected void onListItemClick(ListView l, View v, int position, long id) {	// TODO Auto-generated method stub	super.onListItemClick(l, v, position, id);	System.out.println("id:" + id);	System.out.println("position:" + position);	} }