android中菜单分为三种，分别是，options menu 选项菜单，sub menu 子菜单，context menu 上下文菜单。下面分别举例演示这三种菜单：


新建一个android project，

options menu，第一种方法，通过xml定义选项菜单，在res文件夹中新建一个名为menu的文件夹，在其内新建一个options_menu.xml的文件：

view plain copy to clipboard print ?
  1. <?xmlversion="1.0"encoding="utf-8"?>
  2. <menuxmlns:android="http://schemas.android.com/apk/res/android">
  4. <item
  5. android:id="@+id/newFile"
  6. android:icon="@drawable/ic_launcher"
  7. android:title="@string/newFile"
  8. />
  9. <!--android:icon设置菜单选项的图标
  10. android：title设置菜单选项的标题-->
  11. <item
  12. android:id="@+id/exit"
  13. android:icon="@drawable/ic_launcher"
  14. android:title="@string/exit"
  15. />
  17. </menu>
<?xml version="1.0" encoding="utf-8"?> <menu xmlns:android="http://schemas.android.com/apk/res/android" > <item android:id="@+id/newFile" android:icon="@drawable/ic_launcher" android:title="@string/newFile" /> <!-- android:icon 设置菜单选项的图标 android：title 设置菜单选项的标题 --> <item android:id="@+id/exit" android:icon="@drawable/ic_launcher" android:title="@string/exit" /> </menu>
在MenuTestActivity1中：

view plain copy to clipboard print ?
  1. packagecn.sword.activity;
  3. importandroid.app.Activity;
  4. importandroid.os.Bundle;
  5. importandroid.view.Menu;
  6. importandroid.view.MenuInflater;
  7. importandroid.view.MenuItem;
  8. importandroid.view.MenuItem.OnMenuItemClickListener;
  9. importandroid.widget.Toast;
  11. publicclassMenuTestActivity1extendsActivityimplementsOnMenuItemClickListener{
  12. /**Calledwhentheactivityisfirstcreated.*/
  13. @Override
  14. publicvoidonCreate(BundlesavedInstanceState){
  15. super.onCreate(savedInstanceState);
  16. setContentView(R.layout.main);
  18. }
  20. @Override
  21. publicbooleanonCreateOptionsMenu(Menumenu){
  22. MenuInflaterinflater=this.getMenuInflater();
  23. inflater.inflate(R.menu.options_menu,menu);
  24. //第一种响应菜单点击事件的方法
  25. //为每一个菜单选项添加监听事件
  26. //在覆盖的onMenuItemClick（）方法中判断并触发监听事件
  27. for(inti=0;i<menu.size();i++){
  28. menu.getItem(i).setOnMenuItemClickListener((OnMenuItemClickListener)this);
  29. }
  31. returnsuper.onCreateOptionsMenu(menu);
  32. }
  34. /*第二种响应菜单点击事件的方法覆盖onOptionsItemSelected（）方法
  35. @Override
  36. publicbooleanonOptionsItemSelected(MenuItemitem){
  37. switch(item.getItemId()){
  38. caseR.id.newFile:
  39. Toast.makeText(this,"newFile",Toast.LENGTH_LONG).show();
  40. break;
  41. caseR.id.exit:
  42. this.finish();//退出程序
  43. break;
  44. }
  46. returnsuper.onOptionsItemSelected(item);
  47. }*/
  49. publicbooleanonMenuItemClick(MenuItemitem){
  50. switch(item.getItemId()){
  51. caseR.id.newFile:
  52. Toast.makeText(this,"newFile",Toast.LENGTH_LONG).show();
  53. break;
  54. caseR.id.exit:
  55. this.finish();
  56. }
  58. returnfalse;
  59. }
  61. }
package cn.sword.activity; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.MenuItem.OnMenuItemClickListener; import android.widget.Toast; public class MenuTestActivity1 extends Activity implements OnMenuItemClickListener{ /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = this.getMenuInflater(); inflater.inflate(R.menu.options_menu, menu); //第一种响应菜单点击事件的方法 //为每一个菜单选项添加监听事件 //在覆盖的onMenuItemClick（）方法中判断并触发监听事件 for(int i=0;i<menu.size();i++){ menu.getItem(i).setOnMenuItemClickListener((OnMenuItemClickListener) this); } return super.onCreateOptionsMenu(menu); } /*第二种响应菜单点击事件的方法 覆盖onOptionsItemSelected（）方法 @Override public boolean onOptionsItemSelected(MenuItem item) { switch(item.getItemId()){ case R.id.newFile: Toast.makeText(this,"new File", Toast.LENGTH_LONG).show(); break; case R.id.exit: this.finish();//退出程序 break; } return super.onOptionsItemSelected(item); }*/ public boolean onMenuItemClick(MenuItem item){ switch(item.getItemId()){ case R.id.newFile: Toast.makeText(this, "new File", Toast.LENGTH_LONG).show(); break; case R.id.exit: this.finish(); } return false; } }


在模拟器中点击Menu键效果：




options menu，第二种方法，动态添加删除菜单


在MenuTestActivity2中：

view plain copy to clipboard print ?
  1. packagecn.class3g.activity;
  3. importandroid.app.Activity;
  4. importandroid.os.Bundle;
  5. importandroid.view.Menu;
  6. importandroid.view.MenuInflater;
  7. importandroid.view.MenuItem;
  8. importandroid.widget.Toast;
  10. publicclassMenuTestActivity2extendsActivity{
  11. <spanstyle="white-space:pre"></span>//定义菜单项
  12. privatestaticfinalintSAVE=1;
  13. privatestaticfinalintSAVESAVE_AS=SAVE+1;
  14. privatestaticfinalintDELETE=SAVE+2;
  15. //声明一个menu对象
  16. Menumenu=null;
package cn.class3g.activity; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.widget.Toast; public class MenuTestActivity2 extends Activity { <span style="white-space:pre"> </span>//定义菜单项 private static final int SAVE=1; private static final int SAVE_AS = SAVE+1; private static final int DELETE = SAVE+2; //声明一个menu对象 Menu menu = null; view plain copy to clipboard print ?
  1. publicvoidonCreate(BundlesavedInstanceState){
  2. super.onCreate(savedInstanceState);
  3. setContentView(R.layout.main);
  4. }
  6. publicbooleanonCreateOptionsMenu(Menumenu){
  7. MenuInflaterinflater=this.getMenuInflater();
  8. inflater.inflate(R.menu.options_menu,menu);
  10. //向菜单中添加菜单项
  11. menu.add(1,SAVE,1,"保存");
  12. menu.add(1,SAVE_AS,2,"另存为");
  13. menu.add(1,DELETE,3,"删除保存");
  14. //设置菜单项的图标
  15. menu.findItem(SAVE).setIcon(R.drawable.ic_launcher);
  17. this.menu=menu;
  19. returntrue;
  20. }
  22. <spanstyle="white-space:pre"></span>//动态的修改菜单title
  23. inti=1;
  24. publicbooleanonPrepareOptionsMenu(Menumenu){
  25. MenuItemitem=menu.findItem(SAVE_AS);
  26. item.setTitle(item.getTitle()+""+i);
public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = this.getMenuInflater(); inflater.inflate(R.menu.options_menu, menu); //向菜单中添加菜单项 menu.add(1, SAVE, 1, "保存"); menu.add(1,SAVE_AS, 2, "另存为"); menu.add(1,DELETE, 3, "删除保存"); //设置菜单项的图标 menu.findItem(SAVE).setIcon(R.drawable.ic_launcher); this.menu = menu; return true; } <span style="white-space:pre"> </span>//动态的修改菜单title int i=1; public boolean onPrepareOptionsMenu(Menu menu) { MenuItem item = menu.findItem(SAVE_AS); item.setTitle(item.getTitle() + "" + i); view plain copy to clipboard print ?
  1. i++;
  2. returnsuper.onPrepareOptionsMenu(menu);
  3. }
  4. lt;spanstyle="white-space:pre"></span>//响应菜单单击事件
  5. publicbooleanonOptionsItemSelected(MenuItemitem){
  6. switch(item.getItemId()){
  7. caseR.id.newFile:
i++; return super.onPrepareOptionsMenu(menu); } <span style="white-space:pre"> </span>//响应菜单单击事件 public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.newFile: view plain copy to clipboard print ?
  1. Toast.makeText(this,"newfile",Toast.LENGTH_LONG).show();//利用Toast弹出文本信息
  2. break;
  3. caseR.id.exit:
  4. //Toast.makeText(this,"exit",Toast.LENGTH_LONG).show();
  5. this.finish();//关闭Activity
  6. break;
  7. caseDELETE:<prename="code"class="html"><spanstyle="white-space:pre"></span>//menu.removeGroup(1);//删除一组菜单
Toast.makeText(this, "new file", Toast.LENGTH_LONG).show();//利用Toast弹出文本信息 break; case R.id.exit: // Toast.makeText(this, "exit", Toast.LENGTH_LONG).show(); this.finish();//关闭Activity break; case DELETE:<pre name="code" class="html"><span style="white-space:pre"> </span>//menu.removeGroup(1);//删除一组菜单 menu.removeItem(SAVE_AS);//删除一个菜单break;}return true;}} 

  
  sub menu 子菜单  
  
利用xml定义菜单参考options menu。
  
动态的添加子菜单：
  
在MenuTestActivity3中：
  
              view plain copy to clipboard print ?          
        
  1. packagecn.sword.activity;
    2.     
    3.     
  3. importandroid.app.Activity;
    4.     
  4. importandroid.os.Bundle;
    5.     
  5. importandroid.view.Menu;
    6.     
  6. importandroid.view.MenuInflater;
    7.     
  7. importandroid.view.MenuItem;
    8.     
  8. importandroid.view.SubMenu;
    9.     
  9. importandroid.widget.Toast;
    10.     
    11.     
  11. publicclassMenuTestActivity3extendsActivity{
    12.     
  12. <spanstyle="white-space:pre"></span>//定义菜单项
    13.     
  13. privatestaticfinalintSUBMENU=10;
    14.     
  14. privatestaticfinalintSUBITEM1=SUBMENU+1;
    15.     
  15. privatestaticfinalintSUBITEM2=SUBMENU+2;
    16.     
  16. privatestaticfinalintSUBITEM3=SUBMENU+3;
    17.     
    18.     
  18. @Override
    19.     
  19. protectedvoidonCreate(BundlesavedInstanceState){
    20.     
  20. super.onCreate(savedInstanceState);
    21.     
  21. this.setContentView(R.layout.main);
    22.     
  22. }
    23.     
    24.     
  24. publicbooleanonCreateOptionsMenu(Menumenu){
    25.     
  25. MenuInflaterinflater=this.getMenuInflater();
    26.     
  26. inflater.inflate(R.menu.sub_menu,menu);
    27.     
  27. //添加子菜单
    28.     
  28. SubMenusubMenu=menu.addSubMenu(1,SUBMENU,1,"子菜单");
    29.     
  29. subMenu.add(20,SUBITEM1,1,"subitem1");
    30.     
  30. subMenu.add(20,SUBITEM2,2,"subitem2");
    31.     
  31. subMenu.add(30,SUBITEM3,3,"subitem3");
    32.     
    33.     
  33. subMenu.setGroupCheckable(20,true,false);
    34.     
  34. //第二个参数是否可选
    35.     
  35. //当第三个参数为true时为这组菜单为互斥（单选）菜单
    36.     
  36. //当第三个参数为false时为组菜单为复选菜单
    37.     
    38.     
  38. MenuItemitem=subMenu.getItem(0);
    39.     
  39. //item.setCheckable(false);//设置该项菜单为单选或复选
    40.     
  40. item.setChecked(true);//设置菜单的默认选项
    41.     
    42.     
  42. //subMenu.getItem(0).setCheckable(true);
    43.     
    44.     
  44. returntrue;
    45.     
  45. }
    46.     
    47.     
  47. @Override
    48.     
  48. publicbooleanonOptionsItemSelected(MenuItemitem){
    49.     
  49. switch(item.getItemId()){
    50.     
  50. caseR.id.menuitem1:
    51.     
  51. Toast.makeText(this,"menuitem1",Toast.LENGTH_LONG).show();
    52.     
  52. break;
    53.     
  53. caseR.id.menuitem2:
    54.     
  54. Toast.makeText(this,"menuitem2",Toast.LENGTH_LONG).show();
    55.     
  55. break;
    56.     
  56. caseR.id.subitem1:
    57.     
  57. Toast.makeText(this,"subitem1",Toast.LENGTH_LONG).show();
    58.     
  58. break;
    59.     
  59. caseR.id.subitem2:
    60.     
  60. Toast.makeText(this,"subitem2",Toast.LENGTH_LONG).show();
    61.     
  61. break;
    62.     
  62. caseSUBITEM1:
    63.     
  63. Toast.makeText(this,"SUBITEM1",Toast.LENGTH_LONG).show();
    64.     
  64. break;
    65.     
  65. caseSUBITEM2:
    66.     
  66. Toast.makeText(this,"SUBITEM2",Toast.LENGTH_LONG).show();
    67.     
  67. //this.finish();//退出程序
    68.     
  68. break;
    69.     
  69. }
    70.     
    71.     
  71. returnsuper.onOptionsItemSelected(item);
    72.     
  72. }
    73.     
  73. }
    74.    
   package cn.sword.activity; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.SubMenu; import android.widget.Toast; public class MenuTestActivity3 extends Activity { <span style="white-space:pre"> </span>//定义菜单项 private static final int SUBMENU = 10; private static final int SUBITEM1 = SUBMENU+1; private static final int SUBITEM2 = SUBMENU+2; private static final int SUBITEM3 = SUBMENU+3; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.setContentView(R.layout.main); } public boolean onCreateOptionsMenu(Menu menu){ MenuInflater inflater = this.getMenuInflater(); inflater.inflate(R.menu.sub_menu, menu); //添加子菜单 SubMenu subMenu = menu.addSubMenu(1,SUBMENU,1,"子菜单"); subMenu.add(20,SUBITEM1,1,"subitem1"); subMenu.add(20,SUBITEM2,2,"subitem2"); subMenu.add(30,SUBITEM3,3,"subitem3"); subMenu.setGroupCheckable(20, true, false); //第二个参数是否可选 //当第三个参数为true时为这组菜单为互斥（单选）菜单 //当第三个参数为false时为组菜单为复选菜单 MenuItem item = subMenu.getItem(0); //item.setCheckable(false);//设置该项菜单为单选或复选 item.setChecked(true);//设置菜单的默认选项 //subMenu.getItem(0).setCheckable(true); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch(item.getItemId()){ case R.id.menuitem1: Toast.makeText(this,"menuitem1", Toast.LENGTH_LONG).show(); break; case R.id.menuitem2: Toast.makeText(this,"menuitem2", Toast.LENGTH_LONG).show(); break; case R.id.subitem1: Toast.makeText(this,"subitem1", Toast.LENGTH_LONG).show(); break; case R.id.subitem2: Toast.makeText(this,"subitem2", Toast.LENGTH_LONG).show(); break; case SUBITEM1: Toast.makeText(this,"SUBITEM1", Toast.LENGTH_LONG).show(); break; case SUBITEM2: Toast.makeText(this,"SUBITEM2", Toast.LENGTH_LONG).show(); //this.finish();//退出程序 break; } return super.onOptionsItemSelected(item); } }  
 在模拟器中点击Menu键：  
  
  
  

 
  
单击子菜单：
  
  

 
  
context menu 上下文菜单：context menu需要绑定在TextView上并在其上按2s后显示。
  
在MenuTestActivity4中：
  
              view plain copy to clipboard print ?          
        
  1. packagecn.sword.activity; 
    2.     
  2.  
    3.     
  3. importandroid.app.Activity; 
    4.     
  4. importandroid.os.Bundle; 
    5.     
  5. importandroid.view.ContextMenu; 
    6.     
  6. importandroid.view.ContextMenu.ContextMenuInfo; 
    7.     
  7. importandroid.view.MenuInflater; 
    8.     
  8. importandroid.view.MenuItem; 
    9.     
  9. importandroid.view.View; 
    10.     
  10. importandroid.widget.TextView; 
    11.     
  11. importandroid.widget.Toast; 
    12.     
  12.  
    13.     
  13. publicclassMenuTestActivity4extendsActivity{ 
    14.     
  14. @Override 
    15.     
  15. protectedvoidonCreate(BundlesavedInstanceState){ 
    16.     
  16. super.onCreate(savedInstanceState); 
    17.     
  17. this.setContentView(R.layout.main); 
    18.     
  18. //将上下文菜单绑定到TextView上 
    19.     
  19. TextViewtv=(TextView)this.findViewById(R.id.textView); 
    20.     
  20. this.registerForContextMenu(tv); 
    21.     
  21. } 
    22.     
  22.  
    23.     
  23. @Override 
    24.     
  24. publicbooleanonContextItemSelected(MenuItemitem){ 
    25.     
  25. switch(item.getItemId()){ 
    26.     
  26. caseR.id.subitem1: 
    27.     
  27. Toast.makeText(this,"subitem1",Toast.LENGTH_LONG).show(); 
    28.     
  28. break; 
    29.     
  29. caseR.id.subitem2: 
    30.     
  30. Toast.makeText(this,"subitem2",Toast.LENGTH_LONG).show(); 
    31.     
  31. break; 
    32.     
  32. } 
    33.     
  33. returnsuper.onContextItemSelected(item); 
    34.     
  34. } 
    35.     
  35.  
    36.     
  36. //每次上下文菜单显示都会调用 
    37.     
  37. publicvoidonCreateContextMenu(ContextMenumenu,Viewv, 
    38.     
  38. ContextMenuInfomenuInfo){ 
    39.     
  39.  
    40.     
  40. MenuInflaterinflater=this.getMenuInflater(); 
    41.     
  41. inflater.inflate(R.menu.sub_menu,menu); 
    42.     
  42. super.onCreateContextMenu(menu,v,menuInfo); 
    43.     
  43. } 
    44.     
  44. }
    45.    
   package cn.sword.activity; import android.app.Activity; import android.os.Bundle; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.widget.TextView; import android.widget.Toast; public class MenuTestActivity4 extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.setContentView(R.layout.main); //将上下文菜单绑定到TextView上 TextView tv = (TextView) this.findViewById(R.id.textView); this.registerForContextMenu(tv); } @Override public boolean onContextItemSelected(MenuItem item) { switch(item.getItemId()){ case R.id.subitem1: Toast.makeText(this, "subitem1",Toast.LENGTH_LONG).show(); break; case R.id.subitem2: Toast.makeText(this, "subitem2",Toast.LENGTH_LONG).show(); break; } return super.onContextItemSelected(item); } //每次上下文菜单显示都会调用 public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { MenuInflater inflater = this.getMenuInflater(); inflater.inflate(R.menu.sub_menu, menu); super.onCreateContextMenu(menu, v, menuInfo); } }  
 运行模拟器，点击文本内容2s后：  
  
  
  

 








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