Android学习笔记长按事件的处理

常见的长按事件

代码示例:

  @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        //第二步:把长按事件注册到菜单，并打开菜单

        ImageView imageView = findViewById(R.id.imageView);

        imageView.setOnLongClickListener(new View.OnLongClickListener() {

            @Override

            public boolean onLongClick(View v) {

                registerForContextMenu(v);

                openContextMenu(v);

                return false;

            }

        });

    }

    //第一步：在MainActivity中重写onCreateContextMenu菜单,为菜单添加选项值

    @Override

    public void onCreateContextMenu(ContextMenu menu, View v,

                                    ContextMenu.ContextMenuInfo menuInfo) {

        super.onCreateContextMenu(menu, v, menuInfo);

        menu.add("收藏");

        menu.add("下载");

    }