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，可以使用任意布局的View作为其内容，这个弹出框是悬浮在当前activity之上的。

下面是一个实例

xml文件

<LinearLayout

android:id="@+id/ll_popup"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentBottom="true"

android:background="#ffffff"

android:orientation="vertical" >

<TextView

android:layout_width="match_parent"

android:layout_height="1dp"

android:background="#ff495a" />

<LinearLayout

android:layout_width="match_parent"

android:layout_height="55dp"

android:orientation="horizontal" >

<Button

android:id="@+id/item_popupwindows_camera"

android:layout_width="match_parent"

android:layout_height="55dp"

android:background="@drawable/bt_nobgd"

android:textColor="#585858"

android:textSize="18sp"

android:text="拍照" />

</LinearLayout>

<TextView

android:layout_marginLeft="80dp"

android:layout_width="match_parent"

android:layout_height="1px"

android:background="#f2f2f2" />

<LinearLayout

android:layout_width="match_parent"

android:layout_height="55dp"

android:orientation="horizontal" >

<Button

android:id="@+id/item_popupwindows_Photo"

android:layout_width="match_parent"

android:layout_height="55dp"

android:background="@drawable/bt_nobgd"

android:textColor="#585858"

android:textSize="18sp"

android:text="从相册中选取" />

</LinearLayout>

<TextView

android:layout_width="match_parent"

android:layout_height="2dp"

android:background="#f3f3f3" />

<Button

android:id="@+id/item_popupwindows_cancel"

android:layout_width="match_parent"

android:layout_height="55dp"

android:background="@drawable/bt_nobgd"

android:textColor="#585858"

android:textSize="18sp"

android:text="取消" />

</LinearLayout>

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);

// 下面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窗口

}

});

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();

}

});

}

}

}