Andoroid实现底部图片选择Dialog效果

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical">
 <textview
  android:id="@+id/abroad_takephoto"
  android:layout_width="match_parent"
  android:layout_height="@dimen/abroad_dialog_item_hight"
  android:background="@drawable/abroad_dialogitem_selector"
  android:gravity="center"
  android:text="@string/abroad_photo"
  android:textcolor="@color/abroad_dialog_textcolor"
  android:textsize="@dimen/abroad_dialog_textsize" />
 <view
  android:layout_width="match_parent"
  android:layout_height="@dimen/abroad_dialog_view_hight"
  android:background="@color/abroad_dialog_view_bg" />
 <textview
  android:id="@+id/abroad_choosephoto"
  android:layout_width="match_parent"
  android:layout_height="@dimen/abroad_dialog_item_hight"
  android:background="@drawable/abroad_dialogitem_selector"
  android:gravity="center"
  android:text="@string/abroad_choosephotp"
  android:textcolor="@color/abroad_dialog_textcolor"
  android:textsize="@dimen/abroad_dialog_textsize" />
 <textview
  android:id="@+id/abroad_choose_cancel"
  android:layout_width="match_parent"
  android:layout_height="@dimen/abroad_dialog_item_hight"
  android:layout_margintop="@dimen/abroad_feedback_top"
  android:background="@drawable/abroad_dialogitem_selector"
  android:gravity="center"
  android:text="@string/abroad_cancel"
  android:textcolor="@color/abroad_dialog_textcolor"
  android:textsize="@dimen/abroad_dialog_textsize" />
</linearlayout>

 <color name="abroad_dialog_item">#ffffff</color>
 <color name="abroad_dialog_item_press">#dfdfdf</color>
 <color name="abroad_dialog_textcolor">#222222</color>
 <color name="abroad_dialog_view_bg">#cccccc</color>
 <dimen name="abroad_dialog_item_hight">45dp</dimen>
 <dimen name="abroad_feedback_top">8dp</dimen>
 <dimen name="abroad_dialog_textsize">18sp</dimen>
 <string name="abroad_photo">拍照</string>
 <string name="abroad_choosephotp">从相册选择</string>
 <string name="abroad_cancel">取消</string>

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
 <item android:drawable="@color/abroad_dialog_item_press" android:state_pressed="true" />
 <item android:drawable="@color/abroad_dialog_item" />
</selector>

<style 
name="actionsheetdialogstyle" parent="@android:style/theme.dialog">
 <!-- 背景透明 -->
 <item name="android:windowbackground">@android:color/transparent</item>
 <item name="android:windowcontentoverlay">@null</item>
 <!-- 浮于activity之上 -->
 <item name="android:windowisfloating">true</item>
 <!-- 边框 -->
 <item name="android:windowframe">@null</item>
 <!-- dialog以外的区域模糊效果 -->
 <item name="android:backgrounddimenabled">true</item>
 <!-- 无标题 -->
 <item name="android:windownotitle">true</item>
 <!-- 半透明 -->
 <item name="android:windowistranslucent">true</item>
 <!-- dialog进入及退出动画 -->
 <item name="android:windowanimationstyle">@style/style_inner_map_dialog_animation</item>

<style name="style_inner_map_dialog_animation">
 <!--dialog的进出动画-->
 <item name="android:windowenteranimation">@anim/scale_alpha_to_enter</item>
 <item name="android:windowexitanimation">@anim/scale_alpha_to_exit</item>
</style>

private textview cancel;
private textview takephoto;
private textview choosephoto;
private dialog dialog;
public void chosephotodialog() {
 dialog = new dialog(this, r.style.actionsheetdialogstyle);
 inflate = layoutinflater.from(this).inflate(r.layout.view_abroad_choosephoto_dialog, null);
 choosephoto = (textview) inflate.findviewbyid(r.id.abroad_choosephoto);
 takephoto = (textview) inflate.findviewbyid(r.id.abroad_takephoto);
 cancel = (textview) inflate.findviewbyid(r.id.abroad_choose_cancel);
 choosephoto.setonclicklistener(this);
 takephoto.setonclicklistener(this);
 cancel.setonclicklistener(this);
 dialog.setcontentview(inflate);
 window window = dialog.getwindow();
 if (dialog != null && window != null) {
  window.getdecorview().setpadding(0, 0, 0, 0);
  windowmanager.layoutparams attr = window.getattributes();
  if (attr != null) {
   attr.height = viewgroup.layoutparams.wrap_content;
   attr.width = viewgroup.layoutparams.match_parent;
   attr.gravity = gravity.bottom;//设置dialog 在布局中的位置
   window.setattributes(attr);
  }
 }
 dialog.show();
}

 private static final int photo_request_carema = 1;// 拍照
 private static final int photo_request_gallery = 2;// 从相册中选择
 private static final int photo_request_cut = 3;// 结果

 /***
  * 进入系统相册界面
  */
 private void pickalbum() {
 intent intent = new intent(intent.action_pick, null);
    intent.setdataandtype(mediastore.images.media.external_content_uri, "image/*");
 startactivityforresult(intent, photo_request_gallery);
 }

 protected void takephotos() {
  intent intent = new intent(mediastore.action_image_capture);
  startactivityforresult(intent, photo_request_carema);
 }

@override
 protected void onactivityresult(int requestcode, int resultcode, intent data) {
  switch (requestcode) {
   case photo_request_gallery:
    if (data != null) {
     uri uri = handleimage(data);
     cropphoto(uri);
    }
    break;
   case photo_request_carema:
    if (resultcode == result_canceled) {
     return;
    }
    if (data != null) {
     bitmap photo = data.getparcelableextra("data");
     //将bitmap转化为uri
     uri uri = savebitmap(photo, "temp");
     //启动图像裁剪
     cropphoto(uri);
    }
    break;
   case photo_request_cut:
    logutil.d("abroaduseactivity2", "裁剪");
    // 从剪切图片返回的数据
    if (data == null) {
     return;
    }
    bitmap = data.getparcelableextra("data");
    if (bitmap == null) {//
     return;
    }
    // todo 此处我们便获得了bitmap对象，做其他操作
    bitmap.recycle();
    break;
   default:
    break;
  }
  super.onactivityresult(requestcode, resultcode, data);
 }

 private void cropphoto(uri uri) {
  // 裁剪图片意图
  intent intent = new intent("com.android.camera.action.crop");
  intent.setdataandtype(uri, "image/*");
  intent.putextra("crop", "true");
  // 裁剪框的比例，1：1
  intent.putextra("aspectx", 1);
  intent.putextra("aspecty", 1);
  // 裁剪后输出图片的尺寸大小
  intent.putextra("outputx", 250);
  intent.putextra("outputy", 250);
  intent.putextra("outputformat", "jpeg");// 图片格式
  intent.putextra("nofacedetection", true);// 取消人脸识别
  intent.putextra("return-data", true);
  // 开启一个带有返回值的activity，请求码为photo_request_cut
  startactivityforresult(intent, photo_request_cut);
 }

/**
  * 把bitmap保存到本地
  *
  * @param bm  bitmap
  * @param dirpath 路径
  * @return 文件的uri
  */
 private uri savebitmap(bitmap bm, string dirpath) {
  //新建文件夹用于存放裁剪后的图片
  file tmpdir = new file(environment.getexternalstoragedirectory() + "/" + dirpath);
  if (!tmpdir.exists()) {
   tmpdir.mkdir();
  }
  //新建文件存储裁剪后的图片
  file img = new file(tmpdir.getabsolutepath() + "/feedback.png");
  try {
   //打开文件输出流
   fileoutputstream fos = new fileoutputstream(img);
   //将bitmap压缩后写入输出流(参数依次为图片格式、图片质量和输出流)
   bm.compress(bitmap.compressformat.jpeg, 100, fos);
   fos.flush();
   fos.close();
   //返回file类型的uri
   return uri.fromfile(img);
  } catch (filenotfoundexception e) {
   e.printstacktrace();
   return null;
  } catch (ioexception e) {
   e.printstacktrace();
   return null;
  }
 }