android中如何实现功能,Android中的几种简单小功能实现

自动提醒的设置

根据所输入的内容自动显示出所有相关的提示信息

Step1:在布局文件中定义AutoCompleteTextView

Step2:在主函数中加载布局，并定义数组，得到控件之后设置适配器ArrayAdapter，并将数据设置给适配器

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

String [] names=new String[]{"孙悟空","孙尚香","张无忌","张飞","张牙舞爪","李世民","李小白","不讲理","八戒","aaa","abc","age"};

AutoCompleteTextView nameText=(AutoCompleteTextView) findViewById(R.id.name);

ArrayAdapteradapter=new ArrayAdapter(this,android.R.layout.simple_dropdown_item_1line,names);

nameText.setAdapter(adapter);

}

注意：也可定义布局中对象为MultiAutoCompleteTextView，可以提示多次

setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());//采用逗号作为输入多个对象的分隔符

AutoCompleteTextView

MultiAutoCompleteTextView

Spinner

与自动提醒操作类似，只不过布局中定义的控件为Spinner

Step1:在布局中定义Spinner

Step2：

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Spinner spinner=(Spinner) findViewById(R.id.spinner);

ArrayAdapteradapter=new ArrayAdapter(this,android.R.layout.simple_spinner_item);

adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

adapter.add("福尔摩斯");

adapter.add("阿加莎克里斯蒂");

adapter.add("柯南道尔");

spinner.setAdapter(adapter);

}

效果显示