android 圆角背景和通过menu键功能弹出popupwindow

package com.android.menu;

import android.app.Activity;

import android.content.Context;

import android.graphics.drawable.BitmapDrawable;

import android.os.Bundle;

import android.util.Log;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.GridView;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.LinearLayout.LayoutParams;

import android.widget.PopupWindow;

import android.widget.TextView;

public class MenuTest extends Activity {

    private String TAG = this.getClass().getSimpleName();

    

    private int[] resArray = new int[] {

                    R.drawable.icon, R.drawable.icon,

                    R.drawable.icon, R.drawable.icon

    };

   

    private String[] title = new String[]{

                    "添加歌曲", "歌曲信息", "查找歌词", "搜索歌词"

    };

   

    private static boolean show_flag = false;

   

    private PopupWindow pw = null;

   

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);

}

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

            Log.e(TAG, "------  onCreateOptionsMenu ------");

           

            //用AlertDialog弹出menu

//            View view = LayoutInflater.from(this).inflate(R.layout.menu, null);

//            GridView grid1 = (GridView)view.findViewById(R.id.menuGridChange);

//            grid1.setAdapter(new ImageAdapter(this));

//            Builder build = new AlertDialog.Builder(this);

//            build.setView(view);

//            build.show();

           

            LayoutInflater inflater = (LayoutInflater)this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);      

            View view = inflater.inflate(R.layout.menu, null);

            GridView grid1 = (GridView)view.findViewById(R.id.menuGridChange);

            grid1.setAdapter(new ImageAdapter(this));

           

            //用Popupwindow弹出menu

            pw = new PopupWindow(view,LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);

           

            //NND, 第一个参数， 必须找个View

            pw.showAtLocation(findViewById(R.id.tv), Gravity.CENTER, 0, 300);

           

            return true;

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

            return super.onOptionsItemSelected(item);

    }

    public class ImageAdapter extends BaseAdapter {

           

            private Context context;

           

            public ImageAdapter(Context context) {

                    this.context = context;

            }

           

            @Override

            public int getCount() {

                    return resArray.length;

            }

            @Override

            public Object getItem(int arg0) {

                    return resArray[arg0];

            }

            @Override

            public long getItemId(int arg0) {

                    return arg0;

            }

            @Override

            public View getView(int arg0, View arg1, ViewGroup arg2) {

                    LinearLayout linear = new LinearLayout(context);

                    LinearLayout.LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

                    linear.setOrientation(LinearLayout.VERTICAL);

                   

                    ImageView iv = new ImageView(context);

                    iv.setImageBitmap(((BitmapDrawable)context.getResources().getDrawable(resArray[arg0])).getBitmap());

                    LinearLayout.LayoutParams params2 = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

                    params2.gravity=Gravity.CENTER;

                    linear.addView(iv, params2);

                   

                    TextView tv = new TextView(context);

                    tv.setText(title[arg0]);

                    LinearLayout.LayoutParams params3 = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

                    params3.gravity=Gravity.CENTER;

                   

                    linear.addView(tv, params3);

                   

                    return linear;

            }

    }
}

2.sharder.xml

<?xml version="1.0" encoding="UTF-8"?>

    <shape android:shape="rectangle"

      xmlns:android="http://schemas.android.com/apk/res/android">

        <solid android:color="#b4000000" />

        <stroke android:width="2.0dip" android:color="#b4ffffff" android:dashWidth="3.0dip" android:dashGap="0.0dip" />

        <padding android:left="7.0dip" android:top="7.0dip" android:right="7.0dip" android:bottom="7.0dip" />

        <corners android:radius="8.0dip" />

    </shape>

3.menu.xml

<?xml version="1.0" encoding="UTF-8"?>

    <LinearLayout

            android:orientation="vertical"

            android:layout_width="wrap_content"

            android:layout_height="fill_parent"

            xmlns:android="http://schemas.android.com/apk/res/android">

            <GridView android:gravity="center"

                    android:layout_gravity="center"

                    android:id="@+id/menuGridChange"

                    android:background="@drawable/sharder"

                    android:padding="5.0dip"

                    android:layout_width="fill_parent"

                    android:layout_height="wrap_content"

                    android:horizontalSpacing="10.0dip"

                    android:verticalSpacing="3.0dip"

                    android:stretchMode="columnWidth"

                    android:columnWidth="60.0dip"

                    android:numColumns="auto_fit"

                    xmlns:android="http://schemas.android.com/apk/res/android" />

    </LinearLayout>