PopupWindow

效果图

PopupWindow效果图

代码
layout_pop.xml

PopupWindowActivity

public class PopupWindowActivity extends AppCompatActivity {

    private Button mBtnPop;
    private PopupWindow mPop;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_popup_window);
        mBtnPop = findViewById(R.id.btn_pop);
        mBtnPop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                View view = getLayoutInflater().inflate(R.layout.layout_pop, null);
                TextView tv = view.findViewById(R.id.tv_good);
                tv.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        mPop.dismiss();
                        ToastUtil.showLong(PopupWindowActivity.this, ((TextView)v).getText());
                    }
                });

                mPop = new PopupWindow(view, mBtnPop.getWidth(), ViewGroup.LayoutParams.WRAP_CONTENT);
                mPop.setOutsideTouchable(false);
                mPop.setFocusable(true);
                mPop.showAsDropDown(mBtnPop);
            }
        });
    }
}