android_菜单键选择背景颜色_例子_

需要将package 中的_ 去掉后 即可编译成功

package irdc.ex1001; 

/* import相关class */
import irdc.ex1001.R;
import android.app.Activity; 
import android.app.AlertDialog;
import android.content.Context; 
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle; 
import android.os.PowerManager; 
import android.view.Menu;
import android.view.MenuItem; 
import android.view.Window; 
import android.view.WindowManager; 
import android.widget.LinearLayout;
import android.widget.Toast;

public class EX10_01 extends Activity 
{
 private boolean ifLocked = false;
 private PowerManager.WakeLock mWakeLock; 
 private PowerManager mPowerManager; 
 private LinearLayout mLinearLayout;
 /* 独一无二的menu选项identifier，用以识别事件 */ 
 static final private int M_CHOOSE = Menu.FIRST; 
 static final private int M_EXIT = Menu.FIRST 1;
 /* 颜色菜单的颜色与文字数组 */
 private int[] color={R.drawable.white,R.drawable.blue,
            R.drawable.pink,R.drawable.green,
            R.drawable.orange,R.drawable.yellow};
 private int[] text={R.string.str_white,R.string.str_blue,
           R.string.str_pink,R.string.str_green,
           R.string.str_orange,R.string.str_yellow};
 
 @Override 
 public void onCreate(Bundle savedInstanceState) 
 { 
  super.onCreate(savedInstanceState); 
   
  /* 必须?setContentView之前调用全屏显示 */ 
  requestWindowFeature(Window.FEATURE_NO_TITLE);
  getWindow().setFlags 
  ( 
   WindowManager.LayoutParams.FLAG_FULLSCREEN, 
   WindowManager.LayoutParams.FLAG_FULLSCREEN 
  );
  
  setContentView(R.layout.main);
  /* 初始化mLinearLayout */
  mLinearLayout=(LinearLayout)findViewById(R.id.myLinearLayout1);     
  /* 取得PowerManager */ 
  mPowerManager = (PowerManager)
           getSystemService(Context.POWER_SERVICE); 
  /* 取得WakeLock */
  mWakeLock = mPowerManager.newWakeLock 
  ( 
   PowerManager.SCREEN_BRIGHT_WAKE_LOCK, "BackLight" 
  );
  
  WindowManager.LayoutParams lp = getWindow().getAttributes(); 
  lp.screenBrightness = 1.0f; 
  getWindow().setAttributes(lp); 

 } 

 @Override 
 public boolean onCreateOptionsMenu(Menu menu) 
 { 
  /* menu组ID */ 
  int idGroup1 = 0;  
  /* menuItemID */ 
  int orderMenuItem1 = Menu.NONE; 
  int orderMenuItem2 = Menu.NONE 1; 
  /* 建立menu */ 
  menu.add(idGroup1,M_CHOOSE,orderMenuItem1,R.string.str_title);
  menu.add(idGroup1,M_EXIT,orderMenuItem2,R.string.str_exit); 
  menu.setGroupCheckable(idGroup1, true, true);
 
  return super.onCreateOptionsMenu(menu); 
 } 
  
 @Override 
 public boolean onOptionsItemSelected(MenuItem item) 
 { 
  switch(item.getItemId()) 
  { 
   case (M_CHOOSE):
    /* 弹出选择背后颜色的AlertDialog */
    new AlertDialog.Builder(EX10_01.this)
     .setTitle(getResources().getString(R.string.str_title))
     .setAdapter(new MyAdapter(this,color,text),listener1)
     .setPositiveButton("取消",
       new DialogInterface.OnClickListener()
     {
      public void onClick(DialogInterface dialog, int which)
      {
      }
     })
     .show();
    break; 
   case (M_EXIT): 
    /* 离开程序 */ 
    this.finish(); 
    break; 
  }
  return super.onOptionsItemSelected(item); 
 }
 
 /* 选择背后颜色的AlertDialog的OnClickListener */
 OnClickListener listener1=new DialogInterface.OnClickListener()
 {
  public void onClick(DialogInterface dialog,int which)
  {
   /* 更改背景颜色 */
   mLinearLayout.setBackgroundResource(color[which]);
   /* 北Toast显示设定的颜色 */
   Toast.makeText(EX10_01.this,
           getResources().getString(text[which]),
           Toast.LENGTH_LONG).show();
  }
 };
  
 @Override 
 protected void onResume() 
 { 
  /* onResume()时调用wakeLock() */
  wakeLock(); 
  super.onResume(); 
 } 
  
 @Override 
 protected void onPause() 
 {
  /* onPause()时调用wakeUnlock() */
  wakeUnlock(); 
  super.onPause();
 } 
 
 /* 唤起WakeLock的method */
 private void wakeLock()
 { 
  if (!ifLocked) 
  { 
   ifLocked = true;
   mWakeLock.acquire();
  }
 } 

 /* 释放WakeLock的method */
 private void wakeUnlock() 
 { 
  if (ifLocked) 
  { 
   mWakeLock.release(); 
   ifLocked = false;
  }
 }
 
}