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   源码介绍

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package com.djgzhiyong.dialog;

import android.app.Activity;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;

public class MainActivity extends Activity implements OnClickListener {
	private Button btnPopup;

	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		btnPopup = (Button) findViewById(R.id.btn);
		btnPopup.setOnClickListener(this);
	}

	public void onClick(View v) {
		showDialog();
	}

	private void showDialog() {
		View view = getLayoutInflater().inflate(R.layout.photo_choose_dialog, null);
		Dialog dialog = new Dialog(this, R.style.transparentFrameWindowStyle);
		dialog.setContentView(view, new LayoutParams(LayoutParams.FILL_PARENT,
				LayoutParams.WRAP_CONTENT));
		Window window = dialog.getWindow();
		// 设置显示动画
		window.setWindowAnimations(R.style.main_menu_animstyle);
		WindowManager.LayoutParams wl = window.getAttributes();
		wl.x = 0;
		wl.y = getWindowManager().getDefaultDisplay().getHeight();
		// 以下这两句是为了保证按钮可以水平满屏
		wl.width = ViewGroup.LayoutParams.MATCH_PARENT;
		wl.height = ViewGroup.LayoutParams.WRAP_CONTENT;

		// 设置显示位置
		dialog.onWindowAttributesChanged(wl);
		// 设置点击外围解散
		dialog.setCanceledOnTouchOutside(true);
		dialog.show();
	}
}