Question

在我的应用程序中，我有一个文本视图来设置当月和下个月和上个月的两个按钮。当点击下一个按钮时，我需要将下个月设置为文本视图而不打开月份选择器，也类似于上一个按钮。请任何人帮助我。

Answer 1

Calendar c= Calendar.getInstance();
int next_month = c.get(Calendar.MONTH) + 1;
int prev_month = c.get(Calendar.MONTH) - 1;

Answer 2

试着这个来获取下个月的名字：

Calendar cal = Calendar.getInstance();
cal.add(Calendar.MONTH, 1);
String name = cal.getDisplayName(Calendar.MONTH, Calendar.SHORT, Locale.getDefault());

Answer 3

你也可以使用像getMonth（）这样的方法 - 这个方法获得选定的月份。这将有助于找到当前月份，然后通过添加一些功能按照上一个或下一个按钮更改月份。

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    Button previous,nextmonth;
    TextView calenderview;
    private int year, month, day;
    private Calendar calendar;
        @Override
    protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            previous = (Button) findViewById(R.id.previous_button);
            nextmonth = (Button) findViewById(R.id.next_button);
            calenderview = (TextView) findViewById(R.id.calender);
           calenderview.setText(getCurrentDate());
            previous.setOnClickListener(this);
            nextmonth.setOnClickListener(this);
        }
    public String getCurrentDate(){
        StringBuilder builder=new StringBuilder();
        builder.append("Current Month: ");
        builder.append(Calendar.MONTH);
        return builder.toString();
    }
    private String getnextmonth() {
        StringBuilder builder=new StringBuilder();
        builder.append("Previous Month: ");
        builder.append(Calendar.MONTH+1);
        return builder.toString();
    }

    private String getpreviousmonth() {
        StringBuilder builder=new StringBuilder();
        builder.append("Next Month : ");
        builder.append(Calendar.MONTH-1);
        return builder.toString();
    }

    @Override
    public void onClick(View v) {
        switch(v.getId()){
            case R.id.previous_button:
                calenderview.setText(getpreviousmonth());

                break;
            case R.id.next_button:
                calenderview.setText(getnextmonth());
                break;
        }
    }


}

如何在Android下点击按钮获得下个月？

3 个答案: