下拉列表，日期选择器，时间选择器，单项选择，多项选择

1.下拉列表Spinner

1.1.activity_main.xml

Spinner是下拉列表的组件

1.2.MainActivity.class

public class MainActivity extends AppCompatActivity {

    private Spinner s;
    String[] data=new String[]{"苹果","雪梨","西瓜","葡萄","橙子","草莓"};
    private TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tv= (TextView) this.findViewById(R.id.tv);
        s= (Spinner) this.findViewById(R.id.spinner);
        s.setAdapter(new ArrayAdapter(this,android.R.layout.simple_list_item_1,data));
        s.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView parent, View view, int position, long id) {
                String str=data[position];
                tv.setText("最喜欢的水果是："+str);
            }
            @Override
            public void onNothingSelected(AdapterView parent) {
            }
        });
    }
}

s.setAdapter(new ArrayAdapter(this,android.R.layout.simple_list_item_1,data))； android.R.layout.simple_list_item_1是指安卓自带的下拉列表格式，data是数据源；

s.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()){..}；是下拉列表的监听

2.日期选择器

2.1.activity.xml

2.2.DateActivity.class

public class DateActivity extends ActionBarActivity {

    private Button btn;
    private TextView tv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_date);

        btn=(Button)this.findViewById(R.id.btndate);
        tv= (TextView) this.findViewById(R.id.tv);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new DatePickerDialog(DateActivity.this, new DatePickerDialog.OnDateSetListener() {
                    @Override
                    public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                        tv.setText("您的出生日期是："+String.format("%d-%d-%d",year,monthOfYear+1,dayOfMonth));
                    }
                },2000,1,2).show();
            }
        });
    }
}

DatePickerDialog日历选择器的对话框，监听为OnDateSetListener(){..}

3.时间选择器

3.1.布局

3.2.Java文件

public class DateActivity extends ActionBarActivity {

    private Button btn;
    private TextView tv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_date);

        btn=(Button)this.findViewById(R.id.btndate);
        tv= (TextView) this.findViewById(R.id.tv);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new TimePickerDialog(DateActivity.this, new TimePickerDialog.OnTimeSetListener() {
                    @Override
                    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                        tv.setText(String.format("%d:%d",hourOfDay,minute));
                    }
                //0,0指的是时间，true表示是否为24小时，true为24小时制
                },0,0,true).show();
            }
        });
    }
}

4.单项选择

4.1.布局

4.2.Java文件

public class SingChoose extends AppCompatActivity {
    private Button btn;
    private RadioButton rbD;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.sing_choose);

        rbD= (RadioButton) this.findViewById(R.id.rb4);
        btn= (Button) this.findViewById(R.id.submit);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(rbD.isChecked()){
                    Toast.makeText(SingChoose.this,"正确，请加五分",Toast.LENGTH_SHORT).show();
                }
                else {
                    Toast.makeText(SingChoose.this,"错误，请减五分",Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
}

5.多项选择

5.1.布局

5.2.Java文件

public class CheckChoose extends AppCompatActivity implements CompoundButton.OnCheckedChangeListener {

    private CheckBox cb1,cb2,cb3,cb4,cb5;
    private TextView tv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.check_choose);

        tv= (TextView) this.findViewById(R.id.tv);
        cb1= (CheckBox) this.findViewById(R.id.cb1);
        cb2= (CheckBox) this.findViewById(R.id.cb2);
        cb3= (CheckBox) this.findViewById(R.id.cb3);
        cb4= (CheckBox) this.findViewById(R.id.cb4);
        cb5= (CheckBox) this.findViewById(R.id.cb5);
        cb1.setOnCheckedChangeListener(this);
        cb2.setOnCheckedChangeListener(this);
        cb3.setOnCheckedChangeListener(this);
        cb4.setOnCheckedChangeListener(this);
        cb5.setOnCheckedChangeListener(this);
    }

    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        String str="您喜欢：";
        if(cb1.isChecked()){
            str+=cb1.getText()+",";
        }
        if(cb2.isChecked()){
            str+=cb2.getText()+",";
        }
        if(cb3.isChecked()){
            str+=cb3.getText()+",";
        }
        if(cb4.isChecked()){
            str+=cb4.getText()+",";
        }
        if(cb5.isChecked()){
            str+=cb5.getText()+",";
        }
        tv.setText(str);
    }
}