java - 在从 Firebase 检索的导航抽屉中设置文本
问题描述
我正在尝试在导航栏中显示用户详细信息我已成功从 firebase 检索值,但它没有设置为导航标题文本布局。这是我的导航 xml 文件。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="@dimen/nav_header_height"
android:background="@drawable/header"
android:gravity="bottom"
android:orientation="vertical"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
android:theme="@style/ThemeOverlay.AppCompat.Dark">
<ImageView
android:id="@+id/imageView"
android:layout_width="80dp"
android:layout_height="80dp"
android:contentDescription="@string/nav_header_desc"
android:paddingTop="@dimen/nav_header_vertical_spacing"
app:srcCompat="@drawable/user_icon" />
<TextView
android:id="@+id/holder_nav_text_username"
android:layout_width="wrap_content"
android:textSize="14sp"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:paddingTop="@dimen/nav_header_vertical_spacing"
android:textAppearance="@style/TextAppearance.AppCompat.Body1" />
<TextView
android:id="@+id/holder_nav_text_email"
android:textColor="#ffffff"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/holder_nav_text_phone"
android:textColor="#ffffff"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
这是我的主要活动的java类,其中包含导航标题。
package com.example.closeup;
import android.os.Bundle;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import android.view.View;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;
import com.google.android.material.navigation.NavigationView;
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 androidx.drawerlayout.widget.DrawerLayout;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import android.view.Menu;
import android.widget.TextView;
import android.widget.Toast;
public class Dashboard extends AppCompatActivity {
private AppBarConfiguration mAppBarConfiguration;
FirebaseUser fuser;
DatabaseReference dref,dr;
String uid;
TextView r_username,r_email,r_phone;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_interface);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = findViewById(R.id.fab);
fuser= FirebaseAuth.getInstance().getCurrentUser();
uid=fuser.getUid();
dref= FirebaseDatabase.getInstance().getReference("Users");
r_username=findViewById(R.id.holder_nav_text_username);
r_email=findViewById(R.id.holder_nav_text_email);
r_phone=findViewById(R.id.holder_nav_text_phone);
dref.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
String c_username=dataSnapshot.child(uid).child("name").getValue(String.class);
String c_email=dataSnapshot.child(uid).child("email").getValue(String.class);
String c_phone=dataSnapshot.child(uid).child("phone").getValue(String.class);
Toast.makeText(getApplicationContext(),"Your ID: " + uid,Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(),"Your Name: " + c_username,Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(),"Your email: " + c_email,Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(),"Your phone: " + c_phone,Toast.LENGTH_SHORT).show();
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = findViewById(R.id.drawer_layout);
NavigationView navigationView = findViewById(R.id.nav_view);
mAppBarConfiguration = new AppBarConfiguration.Builder(
R.id.nav_home,R.id.nav_tools, R.id.nav_share,R.id.nav_mealentry, R.id.nav_send,R.id.nav_interfaced)
.setDrawerLayout(drawer)
.build();
NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
NavigationUI.setupWithNavController(navigationView, navController);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.interfacee,menu);
return true;
}
@Override
public boolean onSupportNavigateUp() {
NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
return NavigationUI.navigateUp(navController, mAppBarConfiguration)
|| super.onSupportNavigateUp();
}
}
我已经尝试过这种方式。
dref.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
String c_username=dataSnapshot.child(uid).child("name").getValue(String.class);
String c_email=dataSnapshot.child(uid).child("email").getValue(String.class);
String c_phone=dataSnapshot.child(uid).child("phone").getValue(String.class);
Toast.makeText(getApplicationContext(),"Your ID: " + uid,Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(),"Your Name: " + c_username,Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(),"Your email: " + c_email,Toast.LENGTH_SHORT).show();
Toast.makeText(getApplicationContext(),"Your phone: " + c_phone,Toast.LENGTH_SHORT).show();
r_username.setText(c_username);
r_email.setText(c_email);
r_phone.setText(c_phone);
}
这样应用程序就崩溃了。仅供参考,没有最后三行我会在 Toast 消息中显示确切的数据。现在我如何在导航标题文本视图上显示这些数据。
解决方案
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