Android 点击按钮弹出菜单

效果图：

1、创建menu文件夹，新建main.xml文件

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/add"
        android:title="添加" />
    <item
        android:id="@+id/remove"
        android:title="删除" />
    <item
        android:id="@+id/share"
        android:title="分享" />
</menu>

2、在MainActivity 中

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final ImageView imageVie = findViewById(R.id.main_img);
        imageVie.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                showPopupMenu(imageVie);
            }
        });
    }

    private void showPopupMenu(View view) {
        // View当前PopupMenu显示的相对View的位置
        PopupMenu popupMenu = new PopupMenu(this, view);
        // menu布局
        popupMenu.getMenuInflater().inflate(R.menu.main, popupMenu.getMenu());
        // menu的item点击事件
        popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Toast.makeText(getApplicationContext(), item.getTitle(), Toast.LENGTH_SHORT).show();
                return false;
            }
        });
        // PopupMenu关闭事件
        popupMenu.setOnDismissListener(new PopupMenu.OnDismissListener() {
            @Override
            public void onDismiss(PopupMenu menu) {
                Toast.makeText(getApplicationContext(), "关闭PopupMenu", Toast.LENGTH_SHORT).show();
            }
        });

        popupMenu.show();
    }
}