I'm trying to retrieve my temperature data from the Firebase, but instead nothing appears. Not to sure on what the issue is and how to approach it. I feel as if there is a issue with my Firebase authentication and the ability to give it access to read from the database.
The error prompt:
W/RenderThread: type=1400 audit(0.0:12802165): avc: denied { read } for name="u:object_r:vendor_default_prop:s0" dev="tmpfs" ino=15849 scontext=u:r:untrusted_app_27:s0:c512,c768 tcontext=u:object_r:vendor_default_prop:s0 tclass=file permissive=0
TempHistory.java:
package com.example.dialg.projectlayouts;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.Log;
import android.widget.TextView;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;
import com.google.firebase.database.ChildEventListener;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.Query;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
public class TempHistory extends AppCompatActivity {
FirebaseAuth mAuth;
FirebaseAuth.AuthStateListener mAuthListener;
private FirebaseDatabase database;
private DatabaseReference myRef;
private static final String TAG = "TempHistory";
DataStructure mData;
private TextView temperature;
// private TextView timestamp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_temp_history);
temperature = (TextView) findViewById(R.id.readTemperature);
//Back button
ActionBar actionBar = getSupportActionBar();
actionBar.setTitle("Previous Saves");
mAuth = FirebaseAuth.getInstance();
database = FirebaseDatabase.getInstance();
FirebaseUser user = mAuth.getCurrentUser();
String userID = user.getUid();
myRef = database.getReference().child(userID).child("DataStructure");
//Reads from Database Functions
retrieveData();
}
private void retrieveData(){
myRef.addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
DataStructure ds = dataSnapshot.getValue(DataStructure.class);
temperature.setText("Previous Temperature (in celsius): " +ds.getTemperature());
//timestamp.setText(convertTimestamp(ds.getTimestamp()));
}
/* private String convertTimestamp(String timestamp){
long yourSeconds = Long.valueOf(timestamp);
Date mDate = new Date(yourSeconds * 1000);
DateFormat df = new SimpleDateFormat("dd MMM yyyy hh:mm:ss");
return df.format(mDate);
}
*/
@Override
public void onChildChanged(@NonNull DataSnapshot dataSnapshot,
@Nullable String s) {
DataStructure ds = dataSnapshot.getValue(DataStructure.class);
temperature.setText("Previous Temperature (in celsius): "
+ds.getTemperature());
// timestamp.setText(convertTimestamp(ds.getTimestamp()));
}
@Override
public void onChildRemoved(@NonNull DataSnapshot dataSnapshot) {
}
@Override
public void onChildMoved(@NonNull DataSnapshot dataSnapshot, @Nullable String s) {
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
myRef.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
List<DataStructure> arraylist = new ArrayList<>();
if (dataSnapshot !=null && dataSnapshot.getValue() !=null){
for (DataSnapshot a : dataSnapshot.getChildren()) {
DataStructure dataStructure = new DataStructure();
dataStructure.setTemperature(a.getValue(DataStructure.class).getTemperature());
arraylist.add(dataStructure);
}
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
}
Datastructure:
package com.example.dialg.projectlayouts;
public class DataStructure {
private String temperature;
//private String timestamp;
public DataStructure() {
}
public DataStructure(String temperature) {
this.temperature = temperature;
//this.timestamp = timestamp;
}
public String getTemperature() {
return temperature;
}
public void setTemperature(String temperature) {
this.temperature = temperature;
}
}
I've even changed the rules to writing and reading database to fit the proper credentials.
{
"rules": {
".read": "auth !=null",
".write": "auth !=null"
}
}
