android 应用启动的时弹出的悬浮带有关闭按钮的dialog 例子源码

【实例简介】
【实例截图】
【核心代码】

package com.example.startdialog;

import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.Display;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;

public class MainActivity extends Activity {
	// BaseDialog dia;
	Dialog dia;
	

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		/*
		 * LayoutInflater inflater2 = LayoutInflater.from(MainActivity.this);
		 * View merge_view = inflater2.inflate(R.layout.activity_start_dialog,
		 * null); dia = new BaseDialog(MainActivity.this, merge_view,
		 * R.style.dialog_style); dia.show();
		 */

		Context context = MainActivity.this;
		dia = new Dialog(context, R.style.edit_AlertDialog_style);
		dia.setContentView(R.layout.activity_start_dialog);
		
		
		/*WindowManager wm = (WindowManager)MainActivity.this.getSystemService(Context.WINDOW_SERVICE);
		Display display = wm.getDefaultDisplay();
		int width = display.getWidth();
		Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.splash);
		ImageView imageView =(ImageView)dia.findViewById(R.id.start_img);
		setImageData(imageView,bitmap,width);*/

		Button mClose_btn = (Button) dia.findViewById(R.id.btn_close);
		mClose_btn.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				dia.cancel();// 关闭弹出框
			}
		});
		dia.show();

		dia.setCanceledOnTouchOutside(false); // Sets whether this dialog is
												// canceled when touched outside
												// the window's bounds.
		Window w = dia.getWindow();
		WindowManager.LayoutParams lp = w.getAttributes();
		lp.x = 0;
		lp.y = 40;
		dia.onWindowAttributesChanged(lp);
	}

	/*private void setImageData(ImageView imageView, Bitmap bitmap, int width) {
		// TODO Auto-generated method stub
		FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(width,bitmap.getHeight()*width/bitmap.getWidth());
		imageView.setLayoutParams(params);
		imageView.setScaleType(ScaleType.FIT_XY);
		imageView.setPadding(0, 0, 0, 5);
		imageView.setImageBitmap(bitmap);
	}*/

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}