我需要用firebase制作配方应用程序。我设法将所有文件上传到firebase但无法上传数组列表。这是我的firebase在上传数据时的样子:
有成分的字段说android.widget.ArrayAdapter@374bb。这是我的上传数据代码:
PostActivity.java
public class PostActivity extends AppCompatActivity {
private ImageButton mSelectImage;
private EditText mPostTitle;
private EditText mPostDesc;
private Button mSubmitBtn;
private EditText editTxt;
private Button btn;
private ListView list;
private ArrayAdapter<String> adapter;
private ArrayList<String> arrayList;
private Uri mImageUri = null;
private static final int GALLERY_REQUEST = 1;
private StorageReference mStorage;
private DatabaseReference mDatabase;
private ProgressDialog mProgress;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_post);
mStorage = FirebaseStorage.getInstance().getReference();
mDatabase = FirebaseDatabase.getInstance().getReference().child("Blog");
mSelectImage = (ImageButton) findViewById(R.id.imageSelect);
mPostTitle = (EditText) findViewById(R.id.titleField);
mPostDesc = (EditText) findViewById(R.id.descField);
mSubmitBtn = (Button) findViewById(R.id.submitBtn);
editTxt = (EditText) findViewById(R.id.ingField);
btn = (Button) findViewById(R.id.addBtn);
list = (ListView) findViewById(R.id.list);
arrayList = new ArrayList<String>();
adapter = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_spinner_item, arrayList);
list.setAdapter(adapter);
mProgress = new ProgressDialog(this);
mSelectImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent galleryIntent = new Intent(Intent.ACTION_GET_CONTENT);
galleryIntent.setType("image/*");
startActivityForResult(galleryIntent, GALLERY_REQUEST);
}
});
mSubmitBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startPosting();
}
});
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
arrayList.add(editTxt.getText().toString());
adapter.notifyDataSetChanged();
}
});
}
private void startPosting(){
mProgress.setMessage("Posting to Blog...");
final String title_val = mPostTitle.getText().toString().trim();
final String desc_val = mPostDesc.getText().toString().trim();
final String ingList_val = list.getAdapter().toString().trim();
if (!TextUtils.isEmpty(title_val) && !TextUtils.isEmpty(desc_val) && !TextUtils.isEmpty(ingList_val) && mImageUri !=null){
mProgress.show();
StorageReference filepath = mStorage.child("Blog_Images").child(mImageUri.getLastPathSegment());
filepath.putFile(mImageUri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
@Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
Uri downloadUrl = taskSnapshot.getDownloadUrl();
DatabaseReference newPost = mDatabase.push();
newPost.child("title").setValue(title_val);
newPost.child("desc").setValue(desc_val);
newPost.child("ingList").setValue(ingList_val);
newPost.child("image").setValue(downloadUrl.toString());
mProgress.dismiss();
startActivity(new Intent(PostActivity.this, MainActivity.class));
}
});
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == GALLERY_REQUEST && resultCode == RESULT_OK){
mImageUri = data.getData();
mSelectImage.setImageURI(mImageUri);
}
}
}
将成分逐一写入配料领域,添加到清单,最后提交全部。如何解决这个问题?
答案 0 :(得分:0)
当您使用以下代码行时:
final String ingList_val = list.getAdapter().toString().trim();
您没有获得所需的ArrayList
。 list.getAdapter()
返回 ListAdapter ,而不是ArrayList。注意,android.widget.ArrayAdapter@374bb
不是它自己的对象,只是对象从内存中的引用,因此toString()
方法返回该引用。
因此,当使用以下代码行时:
newPost.child("ingList").setValue(ingList_val);
您正在参与该引用的子ingList
。为了解决这个问题,您可以将ArrayList设置为自己,但我不会重新执行此操作。由于Firebase数据库是JSON
数据库,并且所有内容都是按键和值对组织的,因此我使用Map
重新命名您。
希望它有所帮助。