Android PopupWindows

今天了解到PopupWindows這個布局，PopupWindow這個類用來實現一個彈出框，可以使用任意布局的View作為其內容，這個彈出框是懸浮在當前activity之上的。

下面是一個實例

xml文件

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" >

android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#ff495a" />

android:layout_width="match_parent"
android:layout_height="55dp"
android:orientation="horizontal" >

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" />


android:layout_marginLeft="80dp"
android:layout_width="match_parent"
android:layout_height="1px"
android:background="#f2f2f2" />

android:layout_width="match_parent"
android:layout_height="55dp"
android:orientation="horizontal" >

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="從相冊中選取" />


android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#f3f3f3" />

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" />

MainActivity文件 用來實現拍照獲取本地圖庫的功能。

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);
// 下面這句指定調用相機拍照後的照片存儲的路徑
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri
.fromFile(new File(Environment
.getExternalStorageDirectory(),
"imageTemp.jpg")));
startActivityForResult(intent, 2);
dismiss(); //關閉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/*");// 調用android的圖庫
startActivityForResult(intent, 1);
dismiss();
}
});
bt3.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
dismiss();
}
});
}
}

}