从库中的照片，与选定的照片更换背景图片 [英] select photo from library, replace the background image with the selected Photo

问题描述

我在我的应用程序工作的用户配置文件的照片部分。
我有我的活动背景图像的按钮。当我按一下按钮，将重定向到画廊，我想选择一个图像。选定的图像将替换按钮的背景。结果
下面是我的布局文件

＆LT;？XML版本=1.0编码=UTF-8＆GT？;
＆LT; LinearLayout中的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
机器人：方向=垂直
机器人：layout_width =FILL_PARENT
机器人：layout_height =FILL_PARENT＆GT;
＆LT;按钮
机器人：layout_width =WRAP_CONTENT
机器人：layout_height =WRAP_CONTENT
机器人：文字=选择图片
机器人：背景=@绘制/ icon_user
机器人：ID =@ + ID / ChoosePictureButton/＆GT;
＆LT; / LinearLayout中＆GT;


该怎么做？任何想法？

解决方案

要从图库中选择图像包括在按钮的OnClicklisterner以下

 意向意图=新的Intent（）;
intent.setType（图像/ *）;
intent.setAction（Intent.ACTION_GET_CONTENT）;
intent.addCategory（Intent.CATEGORY_OPENABLE）;
startActivityForResult（意向，SELECT_PICTURE）;
 

 私有静态最终诠释SELECT_PICTURE = 1;
私人字符串selectedImagePath;
  @覆盖
    公共无效的onActivityResult（INT申请code，INT结果code，意图数据）
    {
        如果（结果code == RESULT_OK）{
            如果（要求code == SELECT_PICTURE）
            {
                乌里selectedImageUri = data.getData（）;
                selectedImagePath =的getPath（selectedImageUri）;
                尝试{
                    的FileInputStream fileis =新的FileInputStream（selectedImagePath）;
                    的BufferedInputStream bufferedstream =新的BufferedInputStream（fileis）;
                    字节[] = bMapArray新的字节[bufferedstream.available（）];
                    bufferedstream.read（bMapArray）;
                    位图BMAP = BitmapFactory.de codeByteArray的（bMapArray，0，bMapArray.length）;
                    //在这里，您可以将此/位图图像设置为按钮背景图片                    如果（fileis！= NULL）
                    {
                        fileis.close（）;
                    }
                    如果（bufferedstream！= NULL）
                    {
                        bufferedstream.close（）;
                    }
                }赶上（FileNotFoundException异常五）{
                    e.printStackTrace（）;
                }赶上（IOException异常五）{
                    e.printStackTrace（）;
                }
            }
        }
    }
公共字符串的getPath（URI URI）{
        的String [] =投影{MediaStore.Images.Media.DATA};
        光标光标= managedQuery（URI，投影，NULL，NULL，NULL）;
        INT与Column_Index =光标
                .getColumnIndexOrThrow（MediaStore.Images.Media.DATA）;
        cursor.moveToFirst（）;
        返回cursor.getString（Column_Index中）;
    }
 

i am working on photo section of user profile in my app. i have a button with a background image on my activity. when i click the button it will redirect to gallery and i would like to select an image. the selected image will replace the background in the button.
below is my layout file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Choose Picture" 
android:background="@drawable/icon_user"
android:id="@+id/ChoosePictureButton"/>
</LinearLayout>

how to do that? any idea?

解决方案

To select the image from Gallery include the following in OnClicklisterner of the button

Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(intent, SELECT_PICTURE);

private static final int SELECT_PICTURE = 1;
private String  selectedImagePath;


  @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        if (resultCode == RESULT_OK) {
            if (requestCode == SELECT_PICTURE)
            {
                Uri selectedImageUri = data.getData();
                selectedImagePath = getPath(selectedImageUri);
                try {
                    FileInputStream fileis=new FileInputStream(selectedImagePath);
                    BufferedInputStream bufferedstream=new BufferedInputStream(fileis);
                    byte[] bMapArray= new byte[bufferedstream.available()];
                    bufferedstream.read(bMapArray);
                    Bitmap bMap = BitmapFactory.decodeByteArray(bMapArray, 0, bMapArray.length);
                    //Here you can set this /Bitmap image to the button background image

                    if (fileis != null) 
                    {
                        fileis.close();
                    }
                    if (bufferedstream != null) 
                    {
                        bufferedstream.close();
                    }
                } catch (FileNotFoundException e) {                 
                    e.printStackTrace();
                } catch (IOException e) {                   
                    e.printStackTrace();
                }               
            }
        }
    }


public String getPath(Uri uri) {
        String[] projection = { MediaStore.Images.Media.DATA };
        Cursor cursor = managedQuery(uri, projection, null, null, null);
        int column_index = cursor
                .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    }

这篇关于从库中的照片，与选定的照片更换背景图片的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！