在一个页面中点击menu按钮，添加几个菜单项，点击相应的菜单项，能执行相应的操作

一、一级菜单


代码 
在某个页面中点击menu按钮，添加几个菜单项，点击相应的菜单项，能执行相应的操作
java代码如下：

package com.event;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.app.AlertDialog.Builder;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.view.WindowManager.LayoutParams;
import android.widget.Button;
import android.widget.TextView;

public class EventText1 extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(LayoutParams.FLAG_FULLSCREEN, LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.main);
        
    }


 public void onClickButton(View view) {
  //在这右键找onCreateOptionsMenu
    
   }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // TODO Auto-generated method stub
  menu.add("menu1");
  menu.add("menu2");
 
  return true;
 }
//在这右键onOptionsItemSelected，这段代码是使得相应的菜单选项能够相应。

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
 
  if(item.getTitle().equals("menu1")){//字符串的等于
   Log.v("you selected", item.getTitle().toString());
   //在此添加相应的菜单，应该执行的操作
  }
                 else if(item.getTitle().equals("menu2")){//字符串的等于
   Log.v("you selected", item.getTitle().toString());
   //在此添加相应的菜单，应该执行的操作
  }
  return super.onOptionsItemSelected(item);
 }
 
 }

上面的方法只适合在

onOptionsItemSelected里面直接用字符串进行比较，对于真机里面的，只能用字符串定义引用的方法来用字符串，如@String/...这种方法来用这个字符串，而不能直接引用的时候，
这种方法就不好使了，下面这种更好。

java代码
代码
package com.menu.test1;

import java.text.DateFormat;
import java.util.Date;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SubMenu;
import android.view.Window;
import android.view.WindowManager;
import android.widget.LinearLayout;
import android.widget.Toast;
//import android.os.IHardwareService;

public class MenuTest1 extends Activity {
    /** Called when the activity is first created. */
    private LinearLayout mLinearLayout;
    private static final int WHITE_BRIGHT = Menu.FIRST;
    private static final int GRAY_BRIGHT = WHITE_BRIGHT + 1;
    private static final int BLACK_BRIGHT = GRAY_BRIGHT + 1;
    private static final int WHITE_DIM = BLACK_BRIGHT + 1;
    private static final int GRAY_DIM  = WHITE_DIM + 1;
    private static final int BLACK_DIM  = GRAY_DIM + 1;
    
    private String TAG = "MenuTest1";
 
    // 颜色值定义，程序中并没有全部使用。
    private int[] color = { R.drawable.white, R.drawable.gray,
            R.drawable.black, R.drawable.blue, R.drawable.pink,
            R.drawable.green, R.drawable.orange, R.drawable.yellow };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
         //设置全屏 requestWindowFeature(Window.FEATURE_NO_TITLE);
         getWindow().setFlags ( WindowManager.LayoutParams.FLAG_FULLSCREEN,
         WindowManager.LayoutParams.FLAG_FULLSCREEN );
         //然后调用布局
        setContentView(R.layout.main);
        //设置屏幕的最初亮度
        WindowManager.LayoutParams lp = getWindow().getAttributes();
        lp.screenBrightness = 0.3f;
        getWindow().setAttributes(lp);
        mLinearLayout = (LinearLayout) findViewById(R.id.myLinearLayout1);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // TODO Auto-generated method stub
        menu.add(0, WHITE_BRIGHT, 0,R.string.white_increase);
        menu.add(0,GRAY_BRIGHT,1,R.string.gray_increase);
        menu.add(0,BLACK_BRIGHT,2,R.string.black_increase);
        menu.add(0,WHITE_DIM,3,R.string.white_decrease);     
        menu.add(0,GRAY_DIM,4,R.string.gray_decrease);
        menu.add(0,BLACK_DIM,5,R.string.black_decrease);
        
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        Log.v(TAG, "options start...");
        switch(item.getItemId()){
             //下面不包括变亮和变暗的代码！
        case WHITE_BRIGHT:
            showMsg("白亮");
            mLinearLayout.setBackgroundResource(color[0]);
            break;
        case GRAY_BRIGHT:
            showMsg("灰亮");
            mLinearLayout.setBackgroundResource(color[1]);
            break;
        case BLACK_BRIGHT:
            showMsg("黑亮");
            mLinearLayout.setBackgroundResource(color[2]);
            break;
        case WHITE_DIM:
            showMsg("白暗");
            mLinearLayout.setBackgroundResource(color[0]);
            break;
        case GRAY_DIM:
            showMsg("灰暗");
            mLinearLayout.setBackgroundResource(color[1]);
            break;
        case BLACK_DIM:
            showMsg("黑暗");
            mLinearLayout.setBackgroundResource(color[2]);
            break;
            
       
        }

        return super.onOptionsItemSelected(item);
    }

    private void showMsg(String message) {
        Toast msg = Toast.makeText(MenuTest1.this, message, Toast.LENGTH_LONG);
        msg.show();
    }

}






string.xml



代码



<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">Hello World, MenuTest1!</string>
    <string name="app_name">MenuTest1</string>
    <drawable name="green">#00FF00</drawable>
    <drawable name="pink">#FF87EF</drawable>
    <drawable name="blue">#00FFEA</drawable>
    <drawable name="yellow">#FFFC00</drawable>
    <drawable name="orange">#FFCF3B</drawable>
    <drawable name="white">#FFFFFF</drawable>
    <drawable name="gray">#333333</drawable>
    <drawable name="black">#000001</drawable>
     <string name="white_increase">白色变亮</string>
    <string name="gray_increase">灰色变亮</string>
    <string name="black_increase">黑色变亮</string>
     <string name="white_decrease">白色变暗</string>
    <string name="gray_decrease">灰色变暗</string>
    <string name="black_decrease">黑色变暗</string>
</resources>









这样，就可以用 onOptionsItemSelected中就可以用menu.add()中的第二个参数，itemID做为判断的条件了。


java代码中，
原来的参数0，3变为1，0的时候，如下句:
 menu.add(1,WHITE_DIM,0,R.string.white_decrease);
如图：




原来的参数0，3变为1，1的时候，如下句:
 menu.add(1,WHITE_DIM,1,R.string.white_decrease);
如图：所以自己可以变动几个值，就知道第一个和第三个参数的位置关系了。


如果变成
 menu.add(0, WHITE_BRIGHT, 0,R.string.white_increase);
        menu.add(0,GRAY_BRIGHT,1,R.string.gray_increase);
        menu.add(0,BLACK_BRIGHT,2,R.string.black_increase);
        menu.add(1,WHITE_DIM,0,R.string.white_decrease);     
        menu.add(1,GRAY_DIM,1,R.string.gray_decrease);
        menu.add(1,BLACK_DIM,2,R.string.black_decrease);
如下图：

当点击白色变亮的时候，就会出现提示，并且屏幕会变白，这里没有变亮的代码！
如图


所以，比较好的方法，就是在加菜单的时候，add的时候，用四个参数的方法来添加，这样下面点击这个菜单的时候，方便引用。。



二、二级菜单：
用submenu的方式实现一级菜单下面又有子菜单
（待续。。）
三、点击菜单能够出现对话框，有按钮，标题，（对本人来说，最重要的是带Checkbox）
3.1弹出复选框
1、java程序


代码



package com.menu.test3;

//菜单弹出一个对话框（带Checkbox）。

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SubMenu;
import android.widget.LinearLayout;
import android.widget.Toast;

public class MenuTest3 extends Activity {
    /** Called when the activity is first created. */
    private LinearLayout mLinearLayout;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // TODO Auto-generated method stub
        menu.addSubMenu("屏幕背光");
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // TODO Auto-generated method stub
        new AlertDialog.Builder(MenuTest3.this)
                .setTitle(getResources().getString(R.string.str_title))

                // .setSingleChoiceItems(0, 0, listener1)
                .setMultiChoiceItems(R.array.dialog,
                        new boolean[] { false, false },//这两个boolean值表示checkbox的初始状态是选中还是没有选中
                        new DialogInterface.OnMultiChoiceClickListener() {
                            public void onClick(DialogInterface dialog,
                                    int whichButton, boolean isChecked) {
                                // 点了Checkbox后的执行的东西
                                Toast.makeText(MenuTest3.this, "gg",
                                        Toast.LENGTH_LONG).show();
                            }
                        })
                .setPositiveButton("ok", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) { // 点了确定之后执行的东西
                        Toast.makeText(MenuTest3.this, "ok",
                                Toast.LENGTH_LONG).show();

                    }
                })
                .setNegativeButton("cancel", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) { // 点了确定之后执行的东西
                        Toast.makeText(MenuTest3.this, "cancel",
                                Toast.LENGTH_LONG).show();

                    }
                })
                .show();
        return super.onOptionsItemSelected(item);
    }

}







main.xml


代码



<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
  xmlns:android="http://schemas.android.com/apk/res/android" 
  android:id="@+id/myLinearLayout1" 
  android:orientation="vertical" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent"
/>







string.xml


代码



<?xml version="1.0" encoding="utf-8"?> 
<resources> 
  <string name="hello">Hello World, EX10_01</string> 
  <string name="app_name">EX10_01</string> 
  <string name="str_title">选择背光方式</string> 
  <array name="dialog">
  <item>变亮</item>
   <item>变暗</item>
  </array>
</resources> 





运行结果图：





3.2弹出单选框：
java代码：


代码



package com.ment.test5;

//点击menu，弹出单选框

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.LinearLayout;
import android.widget.Toast;

public class MenutTest5 extends Activity {
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // TODO Auto-generated method stub
        menu.addSubMenu("屏幕背光");
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // TODO Auto-generated method stub
        final CharSequence[] items = {"turn_bright", "turn_dim"};
        new AlertDialog.Builder(MenutTest5.this)
                .setTitle(getResources().getString(R.string.str_title))
           //单选
                .setSingleChoiceItems(items, -1, new DialogInterface.OnClickListener() {
                    
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        // TODO Auto-generated method stub
                        Toast.makeText(getApplicationContext(), items[which], Toast.LENGTH_SHORT).show();
                    }
                })

                .setPositiveButton("ok", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) { // 点了确定之后执行的东西
                        Toast.makeText(MenutTest5.this, "ok",
                                Toast.LENGTH_LONG).show();

                    }
                })
                .setNegativeButton("cancel", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) { // 点了确定之后执行的东西
                        Toast.makeText(MenutTest5.this, "cancel",
                                Toast.LENGTH_LONG).show();

                    }
                })
                .show();
        return super.onOptionsItemSelected(item);
    }

}


posted on 2010-05-14 11:08  snowdrop  阅读(5546)  评论(0)  编辑  收藏  举报