Use the CreateOptionsMenu and onCreateContextMenu menus of Android to simulate the pop-up menu options of WeChat chat interface ., Oncreateoptionsmenu

Use the CreateOptionsMenu and onCreateContextMenu menus of Android to simulate the pop-up menu options of the chat interface ., Oncreateoptionsmenu

1 package com. lixu. menu2; 2 3 import java. util. arrayList; 4 5 import android. app. activity; 6 import android. OS. bundle; 7 import android. view. contextMenu; 8 import android. view. menu; 9 import android. view. menuItem; 10 import android. view. view; 11 import android. view. contextMenu. contextMenuInfo; 12 import android. widget. adapterView. adapterContextMenuInfo; 13 import android. widget. arrayAdapter; 14 imp Ort android. widget. listView; 15 import android. widget. toast; 16 17 public class MainActivity extends Activity {18 private ArrayList <String> data; 19 private ArrayAdapter <String> mAdapter; 20 21 @ Override 22 protected void onCreate (Bundle savedInstanceState) {23 super. onCreate (savedInstanceState); 24 setContentView (R. layout. activity_main); 25 26 data = new ArrayList <String> (); 27 for (int I = 0; I <20; I ++) 28 data. add ("" + I); 29 30 ListView lv = (ListView) findViewById (R. id. listview); 31 mAdapter = new ArrayAdapter <String> (this, android. r. layout. simple_list_item_1, data); 32 33 lv. setAdapter (mAdapter); 34 lv. setOnCreateContextMenuListener (this); 35} 36 37 @ Override 38 public boolean onCreateOptionsMenu (Menu menu) {39 getMenuInflater (). inflate (R. menu. main, menu); 40 return true; 41} 42 43 @ Override 44 public boolean onContextItemSelected (MenuItem item) {45 AdapterContextMenuInfo info = (AdapterContextMenuInfo) item. getMenuInfo (); 46 int pos = info. position; 47 switch (item. getItemId () {48 case 1001: 49 Toast. makeText (this, "dear, this message has not been read! ", 0 ). show (); 50 break; 51 case 1002: 52 53 String s = data. get (pos); 54 data. remove (pos); 55 data. add (0, s); 56 57 mAdapter. notifyDataSetChanged (); 58 59 Toast. makeText (this, "Top chat! ", 0 ). show (); 60 break; 61 case 1003: 62 63 data. remove (pos); 64 mAdapter. notifyDataSetChanged (); 65 66 Toast. makeText (this, "deleted! ", 0 ). show (); 67 break; 68 69 default: 70 break; 71 72} 73 return super. onContextItemSelected (item); 74} 75 76 @ Override 77 public void onCreateContextMenu (ContextMenu menu, View v, ContextMenuInfo menuInfo) {78 super. onCreateContextMenu (menu, v, menuInfo); 79 menu. add (0, 1001,101, "marked as unread"); 80 menu. add (0, 1002,102, "Top chat"); 81 menu. add (0, 1003,103, "delete this chat"); 82} 83 84 @ Override 85 public bo Olean onOptionsItemSelected (MenuItem item) {86 int id = item. getItemId (); 87 switch (id) {88 case R. id. action_settings: 89 Toast. makeText (this, "dear, what do you want to set? ", 0). show (); 90 break; 91 case R. id. action_about: 92 Toast. makeText (this," dear, what do you want to see? ", 0). show (); 93 break; 94 case R. id. action_open: 95 Toast. makeText (this," dear, can I open it for you? ", 0). show (); 96 break; 97 case R. id. action_file: 98 Toast. makeText (this," dear, you know. ", 0). show (); 99 break; 100 101 default: 102 break; 103} 104 return super. onOptionsItemSelected (item); 105} 106}

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