WebView PopWindow Demo

package com.example.testpop;

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.LinearLayout.LayoutParams;
import android.widget.PopupWindow;
import android.widget.Toast;
//主页面放一个WebView
//ActionBar 上面一个menu,点击menu弹出PopWindow 
//PopWindow上面放GridView布局，ItemClick监听器，
//判断点击的item ID执行不同方法 reload(),goback(),goforward()

public class MainActivity extends Activity implements OnItemClickListener,
		OnMenuItemClickListener {
	private PopupWindow mPopupWindow;
	private View mViewiewMain;
	private WebView mWebView;
	private MenuItem mMenuItem;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		mViewiewMain = getLayoutInflater()
				.inflate(R.layout.activity_main, null);
		// button = (Button) findViewById(R.id.button1);
		mWebView = (WebView) findViewById(R.id.webView1);
		mWebView.loadUrl("http://3gqq.qq.com/");
		// WebView重定向
		mWebView.setWebViewClient(new WebViewClient() {
			@Override
			public boolean shouldOverrideUrlLoading(WebView view, String url) {
				view.loadUrl(url);
				return true;
			}
		});
		mPopupWindow = new PopupWindow(this);
		// DisplayMetrics outMetrics = new DisplayMetrics();
		// getWindowManager().getDefaultDisplay().getMetrics(outMetrics);
		// popupWindow.setWidth(outMetrics.widthPixels / 5 * 3);
		// popupWindow.setHeight(outMetrics.heightPixels / 5 * 3);

		// 代码设置PopWindow的宽和高
		mPopupWindow.setWidth(LayoutParams.MATCH_PARENT);
		mPopupWindow.setHeight(LayoutParams.WRAP_CONTENT);
		// PopWindow的布局
		View view = getLayoutInflater().inflate(R.layout.window, null);
		GridView gridView = (GridView) view.findViewById(R.id.gridView1);
		gridView.setAdapter(new GridViewAdapter(this));
		gridView.setOnItemClickListener(this);
		mPopupWindow.setContentView(view);
		// mPopupWindow 获取焦点
		mPopupWindow.setFocusable(true);

	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.main, menu);
		// 找到菜单Menu并设置监听器
		mMenuItem = menu.findItem(R.id.action_menu1);
		mMenuItem.setOnMenuItemClickListener(this);
		return true;

	}

	//
	// public void btn(View v) {
	// mPopupWindow.showAtLocation(mViewiewMain, Gravity.BOTTOM, 10, 0);
	// }

	@Override
	public void onItemClick(AdapterView<?> parent, View view, int position,
			long id) {
		// Toast.makeText(this, position + "", Toast.LENGTH_SHORT).show();
		switch (position) {
		case 0:
			// 刷新
			mWebView.reload();
			mPopupWindow.dismiss();
			break;
		case 1:
			// 后退
			if (mWebView.canGoBack()) {
				mWebView.goBack();
			} else {
				Toast.makeText(this, "不能退了！！！", Toast.LENGTH_SHORT).show();
			}
			mPopupWindow.dismiss();
			break;
		case 2:
			// 前进
			if (mWebView.canGoForward()) {
				mWebView.goForward();
			} else {
				Toast.makeText(this, "不能进了！！！", Toast.LENGTH_SHORT).show();
			}
			mPopupWindow.dismiss();
			break;
		}
	}

	@Override
	public boolean onMenuItemClick(MenuItem item) {
		switch (item.getItemId()) {
		// 显示PopWindow
		// showAtLocation
		case R.id.action_menu1:
			mPopupWindow.showAtLocation(mWebView, Gravity.BOTTOM, 0, 0);
			break;

		}
		return false;
	}
}

package com.example.testpop;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

public class GridViewAdapter extends BaseAdapter {
	private Context context;
	private Integer[] images = { R.drawable.card_refresh, R.drawable.back,
			R.drawable.forward };

	public GridViewAdapter(Context context) {
		super();
		this.context = context;
	}

	@Override
	public int getCount() {
		return images.length;
	}

	@Override
	public Object getItem(int position) {
		return position;
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		ImageView imageView;
		if (convertView == null) {
			imageView = new ImageView(context);
			imageView.setPadding(8, 8, 8, 8);
			imageView.setLayoutParams(new GridView.LayoutParams(
            LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

		} else {
			imageView = (ImageView) convertView;
		}
		imageView.setImageResource(images[position]);
		return imageView;
	}
}