Android的简单组件总结
常用组件的总结：
提示框的使用：
new AlertDialog.Builder(this)
.setTitle("title")
.setMessage("bla..bla")
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
})
.show();
自动提示输入框的使用：
// 通过ID查找到main.xml中的AutoCompleteTextView控件
autoCompleteTextView = (AutoCompleteTextView) findViewById(R.id.autocompleteTv);
// 设定一个Array适配器,将数组数据放入适配器中
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_dropdown_item_1line, item);
// 对AutoCompleteTextView进行适配
autoCompleteTextView.setAdapter(adapter);
//设置AutoCompleteTextView的监听器
autoCompleteTextView.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3)
{
String str = "这次妖精把" + autoCompleteTextView.getText().toString()
+ "抓住了!";
updateText(str);
}
});
// 通过ID查找到main.xml中的MultiAutoCompleteTextView控件
multiAutoCompleteTextView = (MultiAutoCompleteTextView) findViewById(R.id.multiAutoCompleteTextView);
// 对MultiAutoCompleteTextView进行适配
multiAutoCompleteTextView.setAdapter(adapter);
//设置分隔符,默认的是逗号(,)
multiAutoCompleteTextView.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
//设置MultiAutoCompleteTextView的监听器
multiAutoCompleteTextView.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3)
{
String str = "这次妖精把" + multiAutoCompleteTextView.getText().toString()
+ "抓住了!";
updateText(str);
}
});
多个复选框的使用：
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.chkgrp_layout);
// 通过ID查找到main.xml中的RadioButton控件
tangseng= (CheckBox) findViewById(R.id.tangsengchk);
wukong= (CheckBox) findViewById(R.id.sunwukongchk);
bajie= (CheckBox) findViewById(R.id.zhubajiechk);
shazeng= (CheckBox) findViewById(R.id.shaheshangchk);
// 通过ID查找到main.xml中的Button控件
button = (Button) findViewById(R.id.mpbtn);
text = (TextView) findViewById(R.id.mtvInfo);
// 为Button控件增加单击监听器
button.setOnClickListener(this);
}
@Override
public void onClick(View v)
{
String str = "";
//唐僧单选框被选中
if(tangseng.isChecked()){
str += "唐僧~";
}
//悟空单选框被选中
else if(wukong.isChecked()){
str += "悟空~";
}
//八戒单选框被选中
else if(bajie.isChecked()){
str += "八戒~";
}
//沙僧单选框被选中
else if(shazeng.isChecked()){
str += "沙僧~";
}
//没有人被选中
else if(str.equals("")){
str += "没有人";
}
str +="被妖精抓走了！";
updateText(str);
}
单选按钮组的使用：
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.radiogrp_layout);
// 通过ID查找到main.xml中的RadioButton控件
tangseng= (RadioButton) findViewById(R.id.tangseng);
wukong= (RadioButton) findViewById(R.id.sunwukong);
bajie= (RadioButton) findViewById(R.id.zhubajie);
shazeng= (RadioButton) findViewById(R.id.shaheshang);
// 通过ID查找到main.xml中的Button控件
Button button = (Button) findViewById(R.id.pbtn);
text= (TextView) findViewById(R.id.tvInfo);
// 为Button控件增加单击监听器
button.setOnClickListener(this);
}
@Override
public void onClick(View v)
{
String str = "";
//唐僧单选框被选中
if(tangseng.isChecked()){
str += "唐僧~";
}
//悟空单选框被选中
if(wukong.isChecked()){
str += "悟空~";
}
//八戒单选框被选中
if(bajie.isChecked()){
str += "八戒~";
}
//沙僧单选框被选中
if(shazeng.isChecked()){
str += "沙僧~";
}
//没有人被选中
if(str.equals("")){
str += "没有人";
}
str +="被妖精抓走了！";
updateText(str);
}
时间选择器的使用：
@Override
protected Dialog onCreateDialog(int id) {
//用来获取日期和时间的
Calendar calendar = Calendar.getInstance();
Dialog dialog = null;
switch(id) {
case DATE_DIALOG:
DatePickerDialog.OnDateSetListener dateListener =
new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker datePicker,
int year, int month, int dayOfMonth) {
EditText editText =
(EditText) findViewById(R.id.editText);
//Calendar月份是从0开始,所以month要加1
editText.setText("你选择了" + year + "年" +
(month+1) + "月" + dayOfMonth + "日");
}
};
dialog = new DatePickerDialog(this,
dateListener,
calendar.get(Calendar.YEAR),
calendar.get(Calendar.MONTH),
calendar.get(Calendar.DAY_OF_MONTH));
break;
case TIME_DIALOG:
TimePickerDialog.OnTimeSetListener timeListener =
new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timerPicker,
int hourOfDay, int minute) {
EditText editText =
(EditText) findViewById(R.id.editText);
editText.setText("你选择了" + hourOfDay + "时" +
minute + "分");
}
};
dialog = new TimePickerDialog(this, timeListener,
calendar.get(Calendar.HOUR_OF_DAY),
calendar.get(Calendar.MINUTE),
false); //是否为二十四制
break;
default:
break;
}
return dialog;
}
缩放工具：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//设置标题
setTitle("ZoomControls");
zoomControls = (ZoomControls) findViewById(R.id.zoomcontrols);
text = (TextView) findViewById(R.id.text);
//点击放大按钮事件
zoomControls.setOnZoomInClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
size = size + 2;
text.setTextSize(size);
}
});
//点击缩小的按钮的事件
zoomControls.setOnZoomOutClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
size = size - 2;
text.setTextSize(size);
}
});
抽屉功能：
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:background="@drawable/default_bg"> <SlidingDrawer android:layout_width="fill_parent" android:layout_height="fill_parent" android:handle="@+id/handle" android:content="@+id/content" android:orientation="vertical" android:id="@+id/slidingdrawer"> <ImageButton android:id="@id/handle" android:layout_width="50dip" android:layout_height="44dip" android:src="@drawable/up" /> <LinearLayout android:id="@id/content" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#ffffff"> <TextView android:text="这是一个滑动式抽屉的示例" android:id="@+id/tv" android:textSize="18px" android:textColor="#000000" android:gravity="center_vertical|center_horizontal" android:layout_width="match_parent" android:textStyle="bold" android:layout_height="match_parent"></TextView> </LinearLayout> </SlidingDrawer> </LinearLayout>
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
imbg=(ImageButton)findViewById(R.id.handle);
mDrawer=(SlidingDrawer)findViewById(R.id.slidingdrawer);
tv=(TextView)findViewById(R.id.tv);
/**
* 抽屜打開事件
*/
mDrawer.setOnDrawerOpenListener(new SlidingDrawer.OnDrawerOpenListener()
{
@Override
public void onDrawerOpened() {
flag=true;
imbg.setImageResource(R.drawable.down);
}
});
/**
* 抽屜關閉事件
*/
mDrawer.setOnDrawerCloseListener(new SlidingDrawer.OnDrawerCloseListener(){
@Override
public void onDrawerClosed() {
flag=false;
imbg.setImageResource(R.drawable.up);
}
});
/**
* 抽屜拖動事件
*/
mDrawer.setOnDrawerScrollListener(new SlidingDrawer.OnDrawerScrollListener(){
@Override
public void onScrollEnded() {
tv.setText("结束拖动");
}
@Override
public void onScrollStarted() {
tv.setText("开始拖动");
}
});
}