Android应用开发完全自学手册

package wyf.jc; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.SubMenu; import android.view.MenuItem.OnMenuItemClickListener; import android.widget.EditText; public class Sample_7_1 extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } final int MENU_GENDER_MALE=0; //每个菜单项目的编号=======begin========= final int MENU_GENDER_FEMALE=1; final int MENU_HOBBY1=2; final int MENU_HOBBY2=3; final int MENU_HOBBY3=4; final int MENU_OK=5; final int MENU_GENDER=6; final int MENU_HOBBY=7; final int MENU_HOBBY01=8; final int MENU_HOBBY02=9; final int MENU_HOBBY03=10; final int MENU_HOBBY04=11; //每个菜单项目的编号=======end============ final int GENDER_GROUP=0; //性别子菜单项组的编号 final int HOBBY_GROUP=1; //爱好子菜单项组的编号 final int MAIN_GROUP=2; //外层总菜单项组的编号 MenuItem[] miaHobby=new MenuItem[3];//爱好菜单项组 MenuItem male=null;//男性性别菜单项 //获取当前选择状态的方法 public void appendStateStr() { String result="您选择的性别为："; if(male.isChecked()) { result=result+"男"; } else { result=result+"女"; } String hobbyStr=""; for(MenuItem mi:miaHobby) { if(mi.isChecked()) { hobbyStr=hobbyStr+mi.getTitle()+"、"; } } if(hobbyStr.length()>0) { result=result+",您喜欢的书籍为："+hobbyStr.substring(0, hobbyStr.length()-1)+"。\n"; } else { result=result+"。\n"; } EditText et=(EditText)Sample_7_1.this.findViewById(R.id.EditText01); et.append(result); } @Override public boolean onCreateOptionsMenu(Menu menu) { //性别单选菜单项组 菜单若编组就是单选菜单项组 SubMenu subMenuGender = menu.addSubMenu(MAIN_GROUP,MENU_GENDER,0,R.string.gender); subMenuGender.setIcon(R.drawable.select5); male=subMenuGender.add(GENDER_GROUP, MENU_GENDER_MALE, 0, R.string.male); male.setChecked(true); subMenuGender.add(GENDER_GROUP, MENU_GENDER_FEMALE, 0, R.string.female); //设置GENDER_GROUP组是可选择的，互斥的 subMenuGender.setGroupCheckable(GENDER_GROUP, true,true); //爱好复选菜单项组 SubMenu subMenuHobby = menu.addSubMenu(MAIN_GROUP,MENU_HOBBY,0,R.string.hobby); subMenuHobby.setIcon(R.drawable.select6); miaHobby[0]=subMenuHobby.add(HOBBY_GROUP, MENU_HOBBY1, 0, R.string.hobby1); miaHobby[1]=subMenuHobby.add(HOBBY_GROUP, MENU_HOBBY2, 0, R.string.hobby2); miaHobby[2]=subMenuHobby.add(HOBBY_GROUP, MENU_HOBBY3, 0, R.string.hobby3); miaHobby[0].setCheckable(true);//设置菜单项为复选菜单项 miaHobby[1].setCheckable(true); miaHobby[2].setCheckable(true); //确定菜单项 MenuItem ok=menu.add(GENDER_GROUP+2,MENU_OK,0,R.string.ok); OnMenuItemClickListener lsn=new OnMenuItemClickListener() {//实现菜单项点击事件监听接口 @Override public boolean onMenuItemClick(MenuItem item) { appendStateStr(); return true; } }; ok.setOnMenuItemClickListener(lsn);//给确定菜单项添加监听器 //给确定菜单项添加快捷键 ok.setAlphabeticShortcut('o');//设置字符快捷键 //ok.setNumericShortcut('1');//设置数字快捷键 //ok.setShortcut('a', '2');//同时设置两种快捷键 //要注意，同时设置多次时只有最后一个设置起作用 SubMenu subMenu01 = menu.addSubMenu(MAIN_GROUP,MENU_HOBBY01,0,null); subMenu01.setIcon(R.drawable.select4); SubMenu subMenu02 = menu.addSubMenu(MAIN_GROUP,MENU_HOBBY02,0,null); subMenu02.setIcon(R.drawable.select3); SubMenu subMenu03 = menu.addSubMenu(MAIN_GROUP,MENU_HOBBY03,0,R.string.exat01); subMenu03.setIcon(R.drawable.select2); SubMenu subMenu04 = menu.addSubMenu(MAIN_GROUP,MENU_HOBBY04,0,R.string.exat02); subMenu04.setIcon(R.drawable.select1); return true; } @Override //单选或复选菜单项选中状态变化后的回调方法 public boolean onOptionsItemSelected(MenuItem mi) { switch(mi.getItemId()) { case MENU_GENDER_MALE://单选菜单项状态的切换要自行写代码完成 case MENU_GENDER_FEMALE: mi.setChecked(true); appendStateStr();//当有效项目变化时记录在文本区中 break; case MENU_HOBBY1://复选菜单项状态的切换要自行写代码完成 case MENU_HOBBY2: case MENU_HOBBY3: mi.setChecked(!mi.isChecked()); appendStateStr();//当有效项目变化时记录在文本区中 break; } return true; } }