如何在Firebase Android中使用ListView设置图像?

Question

我正在从Firebase数据库中检索数据，这很好用，但看起来很尴尬，我想用图像检索列表视图。怎么做？ 这是我用来从Firebase检索数据的代码。

package com.food.sheenishere.stark;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;

import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import com.firebase.client.Firebase;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.ChildEventListener;
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 java.util.ArrayList;
public class profilemain extends AppCompatActivity {
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthListener;

DatabaseReference mref =FirebaseDatabase.getInstance().getReference("users");
private ProgressDialog progressDialog;
ListView mlistview;
ArrayList<String> arrayList = new ArrayList<>();
ArrayAdapter<String> arrayAdapter;
private BottomNavigationView.OnNavigationItemSelectedListener
mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.navigation_home:
progressDialog.show();
startActivity(new Intent(profilemain.this, profilemain.class));
return true;
case R.id.navigation_dashboard:
Toast.makeText(profilemain.this, "hi hello", Toast.LENGTH_SHORT).show();
return true;
case R.id.navigation_notifications:
Toast.makeText(profilemain.this, "hi hello", Toast.LENGTH_SHORT).show();
return true;
case R.id.navigation_signout:
Toast.makeText(profilemain.this, "You have successfully Signed out", Toast.LENGTH_SHORT).show();
mAuth.signOut();
return true;
}
return false;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profilemain);
progressDialog=new ProgressDialog(this);
progressDialog.setMessage("Loading...");
progressDialog.show();
mlistview = (ListView) findViewById(R.id.listview);
Firebase.setAndroidContext(this);
DatabaseReference ref = FirebaseDatabase.getInstance().getReference("users");
arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, arrayList);
mlistview.setAdapter(arrayAdapter);

mref.addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
String value = dataSnapshot.getValue(String.class);
arrayList.add(value);
arrayAdapter.notifyDataSetChanged();
progressDialog.dismiss();
//
//
}
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
}
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});

BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
mAuth = FirebaseAuth.getInstance();

mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
if (firebaseAuth.getCurrentUser() == null) {
startActivity(new
Intent(profilemain.this, MainActivity.class));
}
}
};

}
@Override
protected void onStart() {
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
}
}

Answer 1

要将图像设置为视图，我建议您使用Glide进行如下操作：

Glide.with(imageView.getContext())
.load(profilePhotoUrl)
.centerCrop()
.transform(new CircleTransform(imageView.getContext()))
.override(40,40)
.into(imageView);

其中imageView是你ImageView的对象.

不要忘记在 build.gradle 文件中的dependencies中添加以下行：

compile 'com.github.bumptech.glide:glide:3.7.0'

希望对您有所帮助。