android如何取得本地通讯录的头像的原图

最新推荐文章于 2021-05-26 06:06:48 发布

哔哩米特

最新推荐文章于 2021-05-26 06:06:48 发布

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文章标签： android 联系人

本文介绍如何从本地通讯录中获取联系人头像，并在UI上显示带有圆角效果的图片。包括代码实现和相关技术点解析。

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原文

http://blog.youkuaiyun.com/baidu_nod/article/details/38678941

上几篇讲contact的时候，取得的头像都是存在数据库中，通过:

cursor = context.getContentResolver().query(  
                    ContentUris.withAppendedId(ContactsContract.Data.CONTENT_URI, photoId),  
                    new String[] { Photo.PHOTO }, null, null, null);

来获取

其实如果我们在本地通讯录中，如果替一个联系人加上图库或拍照的图片，那么系统会把这个图片的清晰图存储起来,如果要取到这个图片，需要contactId

getListView().setOnItemClickListener(new OnItemClickListener() {

      @Override
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        try {
          Cursor cursor = (Cursor) getListAdapter().getItem(position);
          if (cursor == null) {
            return;
          }
          
          int contactId = cursor.getInt(Personal.ID_COLUMN_INDEX);
          Intent intent = new Intent();
          intent.setClass(ContactsList.this, ContactDetail.class);
          intent.putExtra("contactId",contactId);
          startActivity(intent);
        }catch(Exception ex) {
          ex.printStackTrace();
        }
        
      }
    });

如果我们想图片带圆角，可以这样来实现:

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="center" >
    
    <FrameLayout
      android:id="@+id/contacts_logo_layout"
      android:layout_width="@dimen/incall_photo_view_size"
      android:layout_height="@dimen/incall_photo_view_size" >

      <ImageView
        android:id="@+id/contact_photo"
        android:layout_width="@dimen/incall_photo_view_size"
        android:layout_height="@dimen/incall_photo_view_size"
        />

      <ImageView
        android:id="@+id/contacts_logoborder"
        android:layout_width="@dimen/incall_photo_view_size"
        android:layout_height="@dimen/incall_photo_view_size"
        android:background="@drawable/images_box" >
      </ImageView>
    </FrameLayout>
    
  </LinearLayout>

java代码:

@Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.contact_detail);
    
    int contactId = getIntent().getIntExtra("contactId", 0);
    
      contact_photo = (ImageView)findViewById(R.id.contact_photo);
    
    loadTask task = new loadTask(contactId);
    task.execute();
    
  }

  
  private class loadTask extends AsyncTask<Void, Void, Bitmap>{
    
    public loadTask(int id) {
      contactId = id;
    }
    private int contactId;

    @Override
    protected Bitmap doInBackground(Void... params) {
      InputStream inputStream = openDisplayPhoto(contactId);
      
      BitmapFactory.Options opt = new BitmapFactory.Options();
      opt.inSampleSize = 1;
      Bitmap bitmap = BitmapFactory.decodeStream(inputStream, null, opt);
      return bitmap;
    }

    @Override
    protected void onPostExecute(Bitmap result) {
      
      if(result != null) {
        contact_photo.setImageBitmap(result);
      }
      super.onPostExecute(result);
    }

    
  }
  
  public InputStream openDisplayPhoto(long contactId) {  <strong>//这个是取到清晰图的inputStream的代码</strong>
       Uri contactUri = ContentUris.withAppendedId(Contacts.CONTENT_URI, contactId);
       Uri displayPhotoUri = Uri.withAppendedPath(contactUri, Contacts.Photo.DISPLAY_PHOTO);
       try {
           AssetFileDescriptor fd =
          		this.getContentResolver().openAssetFileDescriptor(displayPhotoUri, "r");
           return fd.createInputStream();
       } catch (IOException e) {
      	 e.printStackTrace();
           return null;
       }
   }