Android 从手机相册获取图片 uri 路径从相机获取照片

太过爱你忘了你带给我的痛 2022-12-27 08:24 292阅读 0赞

# Android 从手机相册获取图片 uri 路径 从相机获取照片 #

从手机相册获取图片

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    intent.setType(IMAGE_TYPE);
    startActivityForResult(intent,REQUEST_IMAGE_CAPTURE);

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data){
        if (resultCode != RESULT_OK) {        //此处的 RESULT_OK 是系统自定义得一个常量
            Log.e(TAG,"ActivityResult resultCode error");
            return;
        }
    
        Bitmap bm = null;
    
        //外界的程序访问ContentProvider所提供数据 可以通过ContentResolver接口
        ContentResolver resolver = getContentResolver();
    
        //此处的用于判断接收的Activity是不是你想要的那个
        if (requestCode == IMAGE_CODE) {
            try {
                Uri originalUri = data.getData();        //获得图片的uri 
    
                bm = MediaStore.Images.Media.getBitmap(resolver, originalUri);        //显得到bitmap图片
    
                //获取图片的路径：
    
                String[] proj = {MediaStore.Images.Media.DATA};
    
                //好像是android多媒体数据库的封装接口，具体的看Android文档
                Cursor cursor = managedQuery(originalUri, proj, null, null, null); 
                //按我个人理解 这个是获得用户选择的图片的索引值
                int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
                //将光标移至开头 ，这个很重要，不小心很容易引起越界
                cursor.moveToFirst();
                //最后根据索引值获取图片路径
                String path = cursor.getString(column_index);
            }catch (IOException e) {
                Log.e(TAG,e.toString()); 
            }
        }
    }

从相机获取照片

public final static int REQUEST_IMAGE_CAPTURE = 1;
    
    //start
    Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
    
    //receive
    @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode != RESULT_OK) {
          Log.d(TAG, "canceled or other exception!");
          return;
        }
    
        if (requestCode == REQUEST_IMAGE_CAPTURE) {
          Log.d(TAG, "REQUEST_IMAGE_CAPTURE");
          Bitmap bitmap;
          try {
            bitmap = data.getExtras().getParcelable("data"); 
            //TODO:do something with bitmap, Do NOT forget call Bitmap.recycler();
          } catch (ClassCastException e){
               //do something with exceptions
            e.printStackTrace();
          } 
        }
    
      }