我有网格视图，图像有两列，网格视图完美显示在android marshmallow，而当我在android nougat尝试它只显示进度条，甚至没有占位符显示在Android牛轧糖。请告诉我，它有什么问题。如何解决它。 以下是我的代码
这是滑翔依赖 编译＆＃39; com.github.bumptech.glide：滑翔：3.7.0
activity_profile.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.vijay.newroot.ProfileActivity">
<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/progress_bar"
android:layout_centerHorizontal="true"
/>
<GridView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:numColumns="auto_fit"
android:gravity="center"
android:layout_below="@+id/progress_bar"
android:verticalSpacing="1dp"
android:horizontalSpacing="1dp"
android:stretchMode="columnWidth"
android:id="@+id/profileList">
</GridView>
</RelativeLayout>
card_view.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="1">
<ImageView
android:layout_width="190dp"
android:layout_height="190dp"
android:src="@drawable/fb_avatar"
android:id="@+id/imageId"/>
</RelativeLayout>
ProfileActivity.java
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.media.Image;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ProgressBar;
import android.widget.Toast;
import com.bumptech.glide.Glide;
import com.bumptech.glide.load.engine.DiskCacheStrategy;
import com.bumptech.glide.load.resource.drawable.GlideDrawable;
import com.bumptech.glide.request.RequestListener;
import com.bumptech.glide.request.target.Target;
import com.firebase.ui.database.FirebaseListAdapter;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.google.firebase.auth.FirebaseAuth;
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.Query;
import com.google.firebase.database.ValueEventListener;
import com.squareup.picasso.Callback;
import com.squareup.picasso.NetworkPolicy;
import com.squareup.picasso.Picasso;
import java.util.ArrayList;
public class ProfileActivity extends AppCompatActivity {
GridView profileGrid;
DatabaseReference databaseReference;
FirebaseAuth mAuth;
String uid;
FirebaseHelper helper;
CustomAdapter adapter;
ProgressBar progressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
databaseReference = FirebaseDatabase.getInstance().getReference().child("Blog");
helper=new FirebaseHelper(databaseReference);
profileGrid = (GridView) findViewById(R.id.profileList);
progressBar= (ProgressBar)findViewById(R.id.progress_bar);
mAuth=FirebaseAuth.getInstance();
adapter=new CustomAdapter(this, helper.retrieve(),helper.fetchKey(),progressBar);
profileGrid.setAdapter(new CustomAdapter(this,helper.retrieve(),helper.fetchKey(),progressBar));
}
}
class CustomAdapter extends BaseAdapter {
Context c;
ArrayList<Blog> spacecrafts;
ArrayList<String> post_Key;
ProgressBar progress;
public CustomAdapter(Context c, ArrayList<Blog> spacecrafts,ArrayList<String>post_Key,ProgressBar progressBar) {
this.c = c;
this.spacecrafts = spacecrafts;
this.post_Key=post_Key;
progress=progressBar;
}
@Override
public int getCount() {
return spacecrafts.size();
}
@Override
public Object getItem(int position) {
return spacecrafts.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView==null)
{
convertView= LayoutInflater.from(c).inflate(R.layout.card_view,parent,false);
}
final ImageView imageView= (ImageView) convertView.findViewById(R.id.imageId);
imageView.setLayoutParams(new GridView.LayoutParams(85,85));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
final Blog s= (Blog) this.getItem(position);
final String key=post_Key.get(position);
progress.setVisibility(View.VISIBLE);
Toast.makeText(c,"Up",Toast.LENGTH_SHORT).show();
Glide.with(c).load(s.getImage()).thumbnail(0.5f).crossFade().fitCenter().placeholder(R.drawable.fb_avatar).diskCacheStrategy(DiskCacheStrategy.ALL).listener(new RequestListener<String, GlideDrawable>() {
@Override
public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) {
Toast.makeText(c,"error",Toast.LENGTH_SHORT).show();
return false;
}
@Override
public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) {
return false;
}
}).into(imageView);
Toast.makeText(c,"Down",Toast.LENGTH_SHORT).show();
progress.setVisibility(View.GONE);
convertView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(c,BlogSingleActivity.class);
intent.putExtra("blog_id",key);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
c.startActivity(intent);
}
});
return convertView;
}
}
class FirebaseHelper {
DatabaseReference db;
Boolean saved=null;
ArrayList<Blog> spacecrafts=new ArrayList<>();
ArrayList<String>postkeys=new ArrayList<>();
FirebaseAuth mAuth;
public FirebaseHelper(DatabaseReference db) {
this.db = db;
mAuth=FirebaseAuth.getInstance();
}
//IMPLEMENT FETCH DATA AND FILL ARRAYLIST
//READ BY HOOKING ONTO DATABASE OPERATION CALLBACKS
public ArrayList<Blog> retrieve() {
db.orderByChild("uid").equalTo(mAuth.getCurrentUser().getUid().toString()).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
spacecrafts.clear();
for(DataSnapshot dataSnapshot1:dataSnapshot.getChildren()){
Blog blog=dataSnapshot1.getValue(Blog.class);
String key=dataSnapshot1.getKey();
spacecrafts.add(blog);
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
return spacecrafts;
}
public ArrayList<String> fetchKey(){
db.orderByChild("uid").equalTo(mAuth.getCurrentUser().getUid()).addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
postkeys.clear();
for(DataSnapshot dataSnapshot1:dataSnapshot.getChildren()) {
String key = dataSnapshot1.getKey();
postkeys.add(key);
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
return postkeys;
}
}