自定义Dialog实现类似Toast的功能

大多情况下，使用系统提供的函数便足以完成很多任务。

Toast.makeText(getApplicationContext(),	"Default Toast modul", Toast.LENGTH_SHORT).show();//可用于点击某条item时响应提示信息

但是，总有不满足一些特殊需求。由于系统提供的Toast无法获取焦点，在恶意点击后，Toast会累积点击次数的时间，连续显示，这点是用户无法接受的。

下面是自定义Dialog来实现类似Toast的弹出View之上显示，几秒便自动消失。

封装成类：

public class CustomToast extends Dialog implements Runnable
{
	private Context mContext;
	private Dialog mDialog;
	private TextView mTipsText;
	private int mShowTime;
	
    public CustomToast(Context context)
    {
        super(context, R.style.myStyle);
        this.mContext = context;
        mDialog = new Dialog(mContext, R.style.myStyle);//自定义Dialog的样式
        initView();
        initData();
    }
    
    private void initView() 
	{
    	mDialog.setContentView(R.layout.custom_toast);
		mTipsText = (TextView) mDialog.findViewById(R.id.toastText);
	}

	private void initData() 
    {
    	Window dialogWindow = mDialog.getWindow();//得到要显示的窗口
    	//得到窗口的属性
        WindowManager.LayoutParams winLayoutParams = dialogWindow.getAttributes();
        dialogWindow.setGravity(Gravity.CENTER);
        //重定义窗口的大小
        winLayoutParams.width = 500;
        winLayoutParams.height = 300;
        dialogWindow.setAttributes(winLayoutParams);
        
        mDialog.setOnKeyListener(new OnKeyListener() 
        {
			@Override
			public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) 
			{
				if(event.getAction() == KeyEvent.ACTION_DOWN)
				{
					switch(keyCode)
					{
					case KeyEvent.KEYCODE_BACK:
						dismiss();
						break;
					}
				}
				return false;
			}
		});
	}
	
	@Override
	public void run() 
	{
		while(true)
		{
			try
			{
				Thread.sleep(mShowTime);//睡眠时间
				sendMessage(0);
			} 
			catch (InterruptedException e)
			{
				e.printStackTrace();
			}
		}
	}
	
	private void sendMessage(int msg)
	{
		Message message = new Message();
        message.what = msg;
        mHandler.sendMessage(message);
	}
	
	private Handler mHandler = new Handler()
	{
	    public void handleMessage(Message msg) 
	    {
	    	switch(msg.what)
	    	{
	    	case 0:
    			dismiss();
	    		break;
	    	}
	        super.handleMessage(msg);
	    }
	};
	
	public void setMessage(int msg)
    {
		mTipsText.setText(msg);
    }
	
	public void setMessage(CharSequence msg)
    {
		mTipsText.setText(msg);
    }
	
	public void showTime(int time)
	{
		mShowTime = time;
	}
	
    public void show()
    {
    	mDialog.show();
    	new Thread(this).start();
    }
    
    public void dismiss()
    {
    	if(mDialog.isShowing())
    	{
    		mDialog.dismiss();
    	}
    }
}

调用的地方：

CustomToast myToast = new CustomToast(this);
myToast.setMessage("Hello World !");
myToast.showTime(2000);
myToast.show();

完整代码请下载