Android PopupWindows

今天了解到PopupWindows这个布局，PopupWindow这个类用来实现一个弹出框，能够使用随意布局的View作为其内容，这个弹出框是悬浮在当前activity之上的。

以下是一个实例

xml文件

MainActivity文件用来实现拍照获取本地图库的功能。

package cn.pb.activity;

import java.io.File;

import com.example.pb_android.R;

import android.app.Activity;

import android.content.Context;

import android.content.Intent;

import android.graphics.drawable.BitmapDrawable;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.provider.MediaStore;

import android.view.Gravity;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup.LayoutParams;

import android.view.animation.AnimationUtils;

import android.view.Window;

import android.widget.Button;

import android.widget.LinearLayout;

import android.widget.PopupWindow;

import android.widget.TextView;

public class MainActivity extends Activity implements OnClickListener{

   private TextView t_send,t_ragion;

   private Button btn_images;



   @Override

   protected void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);

       this.requestWindowFeature(Window.FEATURE_NO_TITLE);

       setContentView(R.layout.activity_main);

       Init();

   }

   public void Init(){

       t_send = (TextView) findViewById(R.id.t_send);

       btn_images = (Button) findViewById(R.id.btn_images);

       t_ragion = (TextView) findViewById(R.id.t_ragion);



       t_send.setOnClickListener(this);

       btn_images.setOnClickListener(this);

       t_ragion.setOnClickListener(this);

   }

   @Override

   public void onClick(View v) {

       switch (v.getId()) {

       case R.id.t_send:

           break;

       case R.id.btn_images:

           new PopupWindows(MainActivity.this, v);

           break;

       case R.id.t_ragion:

           break;

       default:

           break;

       }

   }



   public class PopupWindows extends PopupWindow {

       public PopupWindows(Context mContext, View parent) {

           View view = View

                   .inflate(mContext, R.layout.item_popupwindows, null);

           view.startAnimation(AnimationUtils.loadAnimation(mContext,

                   R.anim.fade_ins));

           LinearLayout ll_popup = (LinearLayout) view

                   .findViewById(R.id.ll_popup);

           ll_popup.startAnimation(AnimationUtils.loadAnimation(mContext,

                   R.anim.push_bottom_in_2));

           setWidth(LayoutParams.FILL_PARENT);

           setHeight(LayoutParams.FILL_PARENT);

           setBackgroundDrawable(new BitmapDrawable());

           setFocusable(true);

           setOutsideTouchable(true);

           setContentView(view);

           showAtLocation(parent, Gravity.BOTTOM, 0, 0);

           update();

           Button bt1 = (Button) view

                   .findViewById(R.id.item_popupwindows_camera);

           Button bt2 = (Button) view

                   .findViewById(R.id.item_popupwindows_Photo);

           Button bt3 = (Button) view

                   .findViewById(R.id.item_popupwindows_cancel);

           bt1.setOnClickListener(new OnClickListener() {

               public void onClick(View v) {

                   Intent intent = new Intent(

                           MediaStore.ACTION_IMAGE_CAPTURE);

                   // 以下这句指定调用相机拍照后的照片存储的路径

                   intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri

                           .fromFile(new File(Environment

                                   .getExternalStorageDirectory(),

                                   "imageTemp.jpg")));

                   startActivityForResult(intent, 2);

                   dismiss();     //关闭Pop窗体

               }

           });

           bt2.setOnClickListener(new OnClickListener() {

               public void onClick(View v) {

                   Intent intent = new Intent(Intent.ACTION_PICK, null);

                   intent.setDataAndType(

                           MediaStore.Images.Media.EXTERNAL_CONTENT_URI,

                           "image/*");// 调用android的图库

                   startActivityForResult(intent, 1);

                   dismiss();

               }

           });

           bt3.setOnClickListener(new OnClickListener() {

               public void onClick(View v) {

                   dismiss();

               }

           });

       }

   }

}

18sp

Android PopupWindows