1. WebView
WebView wv = (WebView) findViewById(R.id.web_view);
//支持 JavaScript 脚本
wv.getSettings().setJavaScriptEnabled(true);
//防止跳转到系统浏览器
wv.setWebViewClient(new WebViewClient());
//加载指定网址
wv.loadUrl("http://www.baidu.com");
2. ScrollView
- 能包含一个子控件，若想添加多个控件，可添加一个布局
问题解决：自动显示到中间位置；
修改父布局属性
android:focusable="true" android:focusableInTouchMode="true"
3. DataPickerDialog
//日期选择器
final Calendar calendar = Calendar.getInstance(); //当前日期
DatePickerDialog dialog = new DatePickerDialog(DatePickerDialogActivity.this, new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int month, int day) {
calendarChoose.set(year,month,day);
String mDay=Integer.toString(day);
if(day<10){ //格式化
mDay="0"+mDay;
}
tv.setText(year + "-" + (month + 1) + "-" + mDay);
} //下方这几个值为日期选择器初始值
}, calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH));
dialog.show();
注意： month 默认是从0开始算起
4. TimePickerDialog
//时间选择器
TimePickerDialog timePickerDialog = new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int hourOfDay, int minute) {
String mHour=Integer.toString(hourOfDay) ;
String mMinute=Integer.toString(minute) ;
if(hourOfDay<10){
mHour="0"+hourOfDay;
}
if(minute<10){
mMinute="0"+minute;
}
tv.setText(mHour+":"+mMinute);
}
},0,0,true); //设置初始值 为 00:00
timePickerDialog.show();
5. ViewFlipper
简单使用： 直接添加ImageView
flipInterval 自动切换时间，
ViewFlipper viewFlipper=(ViewFlipper)findViewById(R.id.viewFilpper);
viewFlipper.startFlipping(); //开始
6. ImageView
src属性和background属性的区别
src填入图片时，是按照图片的大小直接填充，并不会进行拉伸。
而是用background填入图片时，则会根据ImageView给定的宽度来进行拉伸。
7.Spinner
下拉菜单
设置Adapter
String[] datas={"Item 1","Item 2","Item 3","Item 4","Item 5"};
ArrayAdapter adapter=new ArrayAdapter(this,android.R.layout.simple_spinner_item,datas);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
关于 setDropDownViewResource 设置下拉列表项的布局样式
代码设置选中项：
spinner.setSelection(2);
选中事件：
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView adapterView, View view, int i, long l) {
spinner.getSelectedItem().toString(); //选中项文本
spinner.getSelectedItemId(); //选中项文本
spinner.getSelectedItemPosition(); //选中项位置,从1开始
}
@Override
public void onNothingSelected(AdapterView adapterView) {
}
});
8.AutoCompleteTextView
常用属性：
| completionThreshoid | 指定用户输入多少个字符后才会显示提示 |
|---|---|
| completionHint | 设置下拉菜单的提示标题 |
| dropDownHeight | 设置下拉菜单的高度 |
| dropDownWidth | 设置下拉菜单的宽度 |
| popuBackground | 设置下拉菜单的背景 |
设置Adapter：
String[] datas={"123","12","11111","1111222","2223333"};
AutoCompleteTextView acTv=(AutoCompleteTextView)findViewById(R.id.activity_test_auto_tv);
ArrayAdapter adapter=
new ArrayAdapter(this,android.R.layout.simple_dropdown_item_1line,datas);
acTv.setAdapter(adapter);
9.SeekBar
常用属性：
| max | 滑动条的最大值 |
|---|---|
| progress | 滑动条的当前值 |
| thumb | 滑块的drawable |
事件：
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
//进度发生改变时触发
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
tvSeekBarInfo.setText("当前进度值 "+seekBar.getProgress()+"/"+seekBar.getMax());
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) { //按住SeekBar触发
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) { //松开SeekBar触发
}
});
10.ProgressDialog
progressDialog = new ProgressDialog(mContext);
progressDialog.setCancelable(true); //设置是否可以通过点击Back取消
progressDialog.setCanceledOnTouchOutside(true);//点击Dialog外区域取消显示Dialog进度条
progressDialog.setMessage(""); //设置显示的内容
progressDialog.setTitle(""); //设置标题
progressDialog.setIcon(R.mipmap.ic_launcher); //Tittle的图标，如果设置Title的话Icon是不会显示的
//ProgressDialog.STYLE_HORIZONTAL 水平进度条
//ProgressDialog.STYLE_SPINNER 圆形进度条
progressDialog.setProgressStyle(STYLE_HORIZONTAL); //设置进度条显示样式
progressDialog.setMax(30); //这是进度条最大值
progressDialog.setProgress(1); //设置进度条的进度值
//监听 Dismiss
progressDialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialog) {
}
});
//设置可点击的按钮，默认情况下有三个可选值
//DialogInterface.BUTTON_POSITIVE //确定
//DialogInterface.BUTTON_NEGATIVE //取消
//DialogInterface.BUTTON_NEUTRAL //中立
progressDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
progressDialog.dismiss();
}
});
11.RadioButton
若果须要实现单选功能，需要报RadioButton放到RadioGroup中，通过RadioGroup的orientation属性来设置排列方向
获取选中RadioButton的两种方式：
RadioGroup rg=(RadioGroup)findViewById(R.id.activity_test_rg); //选中后获取
rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
RadioButton rbtn=(RadioButton)findViewById(checkedId);
Toast.makeText(TestActivity.this, rbtn.getText(), Toast.LENGTH_SHORT).show();
}
});
//手动获取（也就是需要点击Button，必须有默认选中
RadioGroup rg=(RadioGroup)findViewById(R.id.activity_test_rg);
RadioButton rbtn=(RadioButton)findViewById(rg.getCheckedRadioButtonId());
Toast.makeText(TestActivity.this, rbtn.getText(), Toast.LENGTH_SHORT).show();