Andoroid实现底部图片选择Dialog效果

1.效果图如下

点击选择照相后，弹出如下选择对话框：

2. Dialog实现

布局

<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>

上面的高度和颜色,文字：

 <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>

控件selector

<?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>

Dialog 创建

在style文件里面添加主题及dialog弹出动画

<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>

dialog创建

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();
}

Dialig 点击事件

@Override
public void onClick(View view) {
    switch (view.getId()) {
        case R.id.abroad_choosephoto:
            pickAlbum();
            break;
        case R.id.abroad_takephoto:
            takePhotos();
            break;
        case R.id.abroad_choose_cancel:
            dialog.dismiss();
    }
    dialog.dismiss();
}

3. 选择图片

定义事件类型

 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

从相册选取图片

 /***
  * 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);
 }

手机拍照后选取图片

 protected void takePhotos() {
  Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
  startActivityForResult(intent, PHOTO_REQUEST_CAREMA);
 }

图片选择后，最终都会把数据返回到onActivityResult（）方法里面，所以我们需要在activity里面重写此方法

@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);
 }

裁剪的方法

 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);
 }

拍照后需要先把数据保存一个临时的文件，然后再获取文件，才能裁剪

/**
  * 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;
  }
 }

4.注意事项

本来选择后不打算裁剪，但是在小米6等手机上，不裁剪容易崩溃，而裁剪的另一个好处就是压缩图片
在我们获取bitmap后，可以在那里做一些业务操作，但是一定要记得把bitmap文件回收，不然容易导致内存泄漏

总结

以上所述是小编给大家介绍的Andoroid实现底部图片选择Dialog效果，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对我们网站的支持！