场景效果
注:
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。
1
2
3
4
5
6
7
8
9
10
11
12
13
14
|
<?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
1
2
3
4
5
6
7
|
//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。
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
|
@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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
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" ); } } |
总结
以上所述是小编给大家介绍的Android中实现长按照片弹出右键菜单功能的实例代码,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持!
如果你觉得本文对你有帮助,欢迎转载,烦请注明出处,谢谢!
原文链接:https://www.cnblogs.com/badaoliumangqizhi/p/12173456.html