场景
效果
注:
博客:
https://blog.csdn.net/badao_liumang_qizhi
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实现
将布局改为LinearLayout,并通过android:orientation="vertical">设置为垂直布局。
然后添加一个ImageView,并设置id属性和图片源。
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".LongClickActivity"> <ImageView android:id="@+id/image" android:src="@drawable/dog" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </LinearLayout>
然后来到Activity,首先在activity中重写onCreateContextMenu方法,此方法能新增菜单,并添加菜单项
//在activity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("举报"); }
然后在onCreate方法中将长按事件注册到菜单中并打开菜单。
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_long_click); //将长按事件注册到菜单中,并打开菜单 ImageView imageView = (ImageView) findViewById(R.id.image); imageView.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { //注册菜单 registerForContextMenu(v); //打开菜单 openContextMenu(v); return true; } }); }
完整示例代码
package com.badao.relativelayouttest; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.view.ContextMenu; import android.view.View; import android.widget.ImageView; public class LongClickActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_long_click); //将长按事件注册到菜单中,并打开菜单 ImageView imageView = (ImageView) findViewById(R.id.image); imageView.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { //注册菜单 registerForContextMenu(v); //打开菜单 openContextMenu(v); return true; } }); } //在activity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("举报"); } }