Android弹窗ListPopupWindow的简单应用

常用的弹窗有菜单，或者Dialog，但更加人性化和可自定义的还是PopupWindow
如果只是展示列表数据或者弹窗列表选择，直接使用ListPopupWindow即可，不用再单独去设置布局。
如果想要更加多样化的那就自定义一个布局，使用PopupWindow即可，也不复杂。

public class ChargeItemSumPop extends ListPopupWindow {

	public ChargeItemSumPop(Context context) {
		super(context);
	}
}

因为里面已经有一个列表控件了，所以，不用再绑定布局

setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
setWidth(600);
setModal(true);
setBackgroundDrawable(new ColorDrawable(0xCC000000));

//添加想要展示的数据
Calendar calendar = Calendar.getInstance();
int year = calendar.get(Calendar.YEAR);
List lstYear = new ArrayList<>();
for(int i = 2015; i <= year; i++){
    lstYear.add(i);
}
ArrayAdapter adapter = new ArrayAdapter<>(context, android.R.layout.simple_spinner_dropdown_item, lstYear);
setAdapter(adapter);

ChargeDateYearPop pop = new ChargeDateYearPop(this);
pop.setOnItemClickListener((adapterView, view, i, l) -> {
    bindingView.chargeYear.setText(String.valueOf(adapterView.getAdapter().getItem(i)));
    pop.dismiss();
});
pop.setAnchorView(bindingView.chargeYear);
pop.show();

与普通的弹窗不一样的地方在于这里面是一个列表，所以要绑定Adapter进行展示

public class ChargeDateYearPop extends ListPopupWindow {

    public ChargeDateYearPop(Context context) {
        super(context);
        setHeight(800);
        setWidth(200);
        setModal(true);
        setBackgroundDrawable(new ColorDrawable(0xCC000000));
        initView(context);
    }

    private void initView(Context context) {
        Calendar calendar = Calendar.getInstance();
        int year = calendar.get(Calendar.YEAR);
        List lstYear = new ArrayList<>();
        for(int i = 2015; i <= year; i++){
            lstYear.add(i);
        }
        Collections.sort(lstYear);
        Collections.reverse(lstYear);
        ArrayAdapter adapter = new ArrayAdapter<>(context, android.R.layout.simple_spinner_dropdown_item, lstYear);
        setAdapter(adapter);
    }
}

Activity

private void showChargeDateYear(){
    ChargeDateYearPop pop = new ChargeDateYearPop(this);
    pop.setOnItemClickListener((adapterView, view, i, l) -> {
        bindingView.chargeYear.setText(String.valueOf(adapterView.getAdapter().getItem(i)));
        pop.dismiss();
        //重载数据等的操作
        //mPresenter.getCharges(getChargeDate());
    });
    pop.setAnchorView(bindingView.chargeYear);
    pop.show();
}