自定义Diaolg与系统消息通知

        自定义Dialog：

        一.使用DialogActivity将一个activity变成Dailog样式显示。

           Dialog有很多类型（单选，多选，进度条，简单显示文本，自定义等）

 public class DialogActivity extends Activity {       
       private final static int  SIMPLE_DIALOG= 1;
	private final static int  CUSTOM_VIEW_DIALOG=2;	
	private final static int  PROGRESS_DIALOG=3;
	Dialog d;		
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);		
		this.setContentView(R.layout.dialog);
		
		findViewById(R.id.button1).setOnClickListener(new Button.OnClickListener(){
			@Override
			public void onClick(View arg0) {				
				DialogActivity.this.showDialog(SIMPLE_DIALOG, null);
			}
		});
				
		findViewById(R.id.button2).setOnClickListener(new Button.OnClickListener(){

			@Override
			public void onClick(View arg0) {								DialogActivity.this.showDialog(CUSTOM_VIEW_DIALOG, null);
			}
		});
		
		findViewById(R.id.button3).setOnClickListener(new Button.OnClickListener(){

			@Override
			public void onClick(View arg0) {				
				DialogActivity.this.showDialog(PROGRESS_DIALOG, null);
			}
		});		
	
	@Override
	protected Dialog onCreateDialog(int id, Bundle args) {
		//简单的Dialog ，显示标题，内容，图标
		if(SIMPLE_DIALOG==id)
			return new AlertDialog.Builder(this)
					.setTitle("tille")
					.setIcon(android.R.drawable.ic_dialog_alert)
					.setMessage("thisis message")			
					.create();
                   //自定义布局的Dialog
		else if(CUSTOM_VIEW_DIALOG == id){
			LayoutInflater inflater=LayoutInflater.from(this);		
			return new AlertDialog.Builder(this)
					.setView(inflater.inflate( R.layout.dialog, null) )
					.setTitle("tille")
					.setIcon(android.R.drawable.ic_dialog_alert)
					.setMessage("thisis message")
					.setPositiveButton("OK", null)
					.setNegativeButton("Cancle", null)
					.create();
		}
                   //进度条类型Dialog
               else if(PROGRESS_DIALOG==id){
			ProgressDialog dialog=new ProgressDialog(this);
			dialog.setTitle("title");
			dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER); //进度条类型（长条型，圆圈型等）
			dialog.setMax(100);  
			dialog.incrementProgressBy(20);  //自定了当前进度（一般要通过具体业务实现）
			return dialog;
		}
		return super.onCreateDialog(id);
		
	}
	
}

        二.创建一个Dialog再进行调用

      在values文件夹下的styles文件中配置

 <style name="MyDialog" parent="@android:Theme.Dialog">
        <item name="android:windowFrame">@null</item>
        <item name="android:windowNoTitle">true</item> //设置Dialog无标题
        <item name="android:windowBackground">@color/blue</item>   //设置背景
        <item name="android:windowIsFloating">true</item>  //设置Dialog悬浮
        <item name="android:windowContentOverlay">@null</item>
    </style>

      创建自定义Dialog类

public class FriendsMsgDialog extends Dialog {
    Context context;
    int position;
    MyApplication application;
    ImageView icon;
    TextView nickname;
    TextView address;
    TextView sex;
    TextView phone;
    JSONArray array;
    LayoutInflater inflater;
       //重载构造函数
	public FriendsMsgDialog(Context context, int theme,int position,JSONArray array) {
		super(context, theme);
		this.context=context;
		this.position=position;
		this.array=array;
		application=(MyApplication) context.getApplicationContext();
		inflater=LayoutInflater.from(context);
	}

      //要实现onCreate(Bundle savedInstanceState) 方法

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		View view=inflater.inflate(R.layout.friends_msg,null);
		
		JSONObject obj;
		try {
		obj = (JSONObject) array.get(position);
               //获取自定义Dialog界面上的各个组件		
		icon=(ImageView) view.findViewById(R.id.img_dtlfriends_icon);
		nickname=(TextView) view.findViewById(R.id.tv_dtlfriends_nickname);
		address=(TextView) view.findViewById(R.id.tv_dtlfriends_address);
		sex=(TextView) view.findViewById(R.id.tv_dtlfriends_sex);
		phone=(TextView) view.findViewById(R.id.tv_dtlfriends_phone);
		//给各组件赋值（通过具体业务）
	    nickname.setText(obj.getString("nick_name"));
	    address.setText(obj.getString("address"));
	    sex.setText(obj.getString("sex"));
	    phone.setText(obj.getString("phone"));
	    GetIcon.getview(obj.getString("icon"), icon);
		} catch (JSONException e) {
			e.printStackTrace();
		}
		setContentView(view);
	}
}

       调用Diaog

public boolean onItemLongClick(AdapterView<?> parent, View view,
	        int position, long id) {  //长按listView的某一项显示Dialog
		if(dialog==null){
		   dialog=new FriendsMsgDialog(context, R.style.MyDialog,position,array);
		   dialog.show();
		}else
		   dialog.show();
		return true;

 系统消息通知：

    

NotificationManager nm;
findViewById(R.id.button6).setOnClickListener(new Button.OnClickListener(){

			@Override
			public void onClick(View arg0) {
				installNotificaiton();
			}
		});

	private void installNotificaiton()
	{
		//获取系统 通知服务
		nm=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);
		
		//创建一个通知 
		Notification nf=new Notification();
		
		//设置状态text
		nf.tickerText="new messages incoming...";
		//设置时间
		nf.when=System.currentTimeMillis();
		//设置icon
		nf.icon=R.drawable.ic_launcher;
		
		//设置特性
		nf.flags=nf.FLAG_AUTO_CANCEL ;
		
                //点击消息跳转到MainActivity
		PendingIntent pi=PendingIntent.getActivity(this, 0,  new Intent(this, MainActivity.class ),PendingIntent.FLAG_CANCEL_CURRENT);
               
		nf.setLatestEventInfo(this, "title", "somebody send you msg", pi);
		nm.notify(2014, nf);		
	}