我正在尝试使用存储在http://cloudinary.com/上的图像来膨胀 ListView 。图片的 URL 保存为我的 Firebase 数据库中的一个字段。我正在使用 Picasso 客户端。但是我在我的数据库中注意到的是，为每条记录存储的 URL 链接工作正常。但是当我尝试在我的代码中检索相同的内容时，它显示 URL 为 null 作为敬酒。除图像外，所有其他记录均已正确获取并且工作正常。
1）初始化我的列表视图并设置适配器。
HomeSearchActivity.java
@Override
protected void onStart() {
databaseMember.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
memberList.clear();
for (DataSnapshot memberSnapshot : dataSnapshot.getChildren()) {
Member_Pojo member = memberSnapshot.getValue(Member_Pojo.class);
Log.e(TAG, "onDataChange: " + member.getName());
memberList.add(member);
}
MembersListAdapter adapter = new MembersListAdapter(HomeSearchActivity.this, memberList);
listViewHome.setAdapter(adapter);
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
super.onStart();
}
2）listView的适配器类
MembersListAdapter.java
import android.app.Activity;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.List;
/**
* Created by Sumeet on 05-07-2017.
*/
public class MembersListAdapter extends ArrayAdapter<Member_Pojo> {
private Activity context;
// private Context c;
private List<Member_Pojo> memberList;
// CustomFilter filter;
// ArrayList<Member_Pojo> filterlist;
public MembersListAdapter(Activity context, List<Member_Pojo> memberList) {
super(context, R.layout.home_listview_display, memberList);
this.context = context;
this.memberList = memberList;
//this.filterlist = (ArrayList<Member_Pojo>) memberList;
}
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
LayoutInflater inflater = context.getLayoutInflater();
View listViewItem = inflater.inflate(R.layout.home_listview_display, null, true);
TextView name_tv = (TextView) listViewItem.findViewById(R.id.tv_name_display);
TextView town_tv = (TextView) listViewItem.findViewById(R.id.tv_town_display);
TextView id = (TextView) listViewItem.findViewById(R.id.textViewID);
ImageView imageView_dp = (ImageView) listViewItem.findViewById(R.id.imageView_dps);
Member_Pojo member = memberList.get(position);
name_tv.setText(member.getName());
town_tv.setText(member.getTownP());
id.setText(member.getId());
Toast.makeText(context, "URL IS : " + member.getDP_URL(), Toast.LENGTH_SHORT).show();
Toast.makeText(context, "name IS : " + member.getName(), Toast.LENGTH_SHORT).show();
PicassoClient.downloadImage(context, member.getDP_URL(), imageView_dp);
imageView_dp.setImageResource(member.getDP_URL());
return listViewItem;
}
}
3）使用毕加索下载图像：这里只有我显示的占位符图像。我想的原因是该类被传递了一个空值。（在传递值之前尝试使用日志，它显示为NULL。）
import android.content.Context;
import android.util.Log;
import android.widget.ImageView;
import com.squareup.picasso.Picasso;
/**
* Created by Sumeet on 15-07-2017.
*/
public class PicassoClient {
public static void downloadImage(Context c, String url, ImageView img) {
if (url != null && url.length() > 0) {
Picasso.with(c).load(url).placeholder(R.drawable.noimage).into(img);
Log.e("myTag", "URL is not null" + url);
} else {
Picasso.with(c).load(R.drawable.noimage).into(img);
Log.e("myTag", "URL is null");
}
}
}
4）下面是日志输出
[ 07-16 15:48:30.305 22740:22740 D/ ]
HostConnection::get() New Host Connection established 0x77f95fc15420, tid 22740
07-16 15:48:30.321 22740-22804/com.example.sumeet.kalwardirectorytry1 D/NetworkSecurityConfig: No Network Security Config specified, using platform default
[ 07-16 15:48:30.379 22740:22803 D/ ]
HostConnection::get() New Host Connection established 0x77f95fc15cc0, tid 22803
07-16 15:48:30.380 1298-3194/? D/gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
07-16 15:48:30.381 22740-22803/com.example.sumeet.kalwardirectorytry1 I/OpenGLRenderer: Initialized EGL, version 1.4
07-16 15:48:30.382 22740-22803/com.example.sumeet.kalwardirectorytry1 D/OpenGLRenderer: Swap behavior 1
07-16 15:48:30.382 22740-22803/com.example.sumeet.kalwardirectorytry1 W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
07-16 15:48:30.382 22740-22803/com.example.sumeet.kalwardirectorytry1 D/OpenGLRenderer: Swap behavior 0
07-16 15:48:30.394 1298-3194/? D/gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
07-16 15:48:30.423 1298-3194/? D/gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
07-16 15:48:30.511 22740-22740/com.example.sumeet.kalwardirectorytry1 W/art: Before Android 4.1, method int android.support.v7.widget.ListViewCompat.lookForSelectablePosition(int, boolean) would have incorrectly overridden the package-private method in android.widget.ListView
07-16 15:48:30.724 2898-2898/com.android.inputmethod.latin W/InputMethodService: Window size has been changed. This may cause jankiness of resizing window: -1 -> -2
07-16 15:48:30.727 2098-2355/system_process I/ActivityManager: Displayed com.example.sumeet.kalwardirectorytry1/.HomeSearchActivity: +2s66ms
07-16 15:48:30.736 22740-22783/com.example.sumeet.kalwardirectorytry1 D/FA: Connected to remote service
07-16 15:48:30.736 22740-22783/com.example.sumeet.kalwardirectorytry1 V/FA: Processing queued up service tasks: 2
07-16 15:48:30.775 2898-2898/com.android.inputmethod.latin I/LatinIME: Starting input. Cursor position = -1,-1
07-16 15:48:30.776 2898-2898/com.android.inputmethod.latin E/RichInputConnection: Unable to connect to the editor to retrieve text.
07-16 15:48:30.776 2898-2898/com.android.inputmethod.latin D/RichInputConnection: Will try to retrieve text later.
07-16 15:48:30.777 2898-2898/com.android.inputmethod.latin I/InputAttributes: InputType.TYPE_NULL is specified
07-16 15:48:30.827 1298-1298/? W/SurfaceFlinger: couldn't log to binary event log: overflow.
07-16 15:48:30.829 1298-1298/? W/SurfaceFlinger: couldn't log to binary event log: overflow.
07-16 15:48:30.919 2098-2355/system_process D/gralloc_ranchu: gralloc_unregister_buffer: exiting HostConnection (is buffer-handling thread)
07-16 15:48:30.940 2898-2898/com.android.inputmethod.latin I/LatinIME: Starting input. Cursor position = 0,0
07-16 15:48:31.085 1298-1617/? D/gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
07-16 15:48:31.103 1298-1616/? D/gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
07-16 15:48:31.123 1298-1616/? D/gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
07-16 15:48:31.522 4179-4179/com.google.android.gms.unstable W/Binder:4179_2: type=1400 audit(0.0:15): avc: denied { read } for name="/" dev="tmpfs" ino=4097 scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:device:s0 tclass=dir permissive=0
07-16 15:48:32.909 3847-4858/com.google.android.gms.persistent W/Conscrypt: Could not set socket write timeout: null
07-16 15:48:33.178 3847-4858/com.google.android.gms.persistent W/Conscrypt: Could not set socket write timeout: null
07-16 15:48:33.246 1311-1366/? D/AudioFlinger: mixer(0xebc83900) throttle end: throttle time(18)
07-16 15:48:33.373 2898-2898/com.android.inputmethod.latin W/InputMethodService: Window size has been changed. This may cause jankiness of resizing window: -1 -> -2
07-16 15:48:33.609 3847-4858/com.google.android.gms.persistent W/GLSUser: [AppCertManager] IOException while requesting key:
java.io.IOException: Invalid device key response.
at evk.a(:com.google.android.gms:274)
at evk.a(:com.google.android.gms:4238)
at evj.a(:com.google.android.gms:45)
at evd.a(:com.google.android.gms:50)
at evc.a(:com.google.android.gms:104)
at com.google.android.gms.auth.account.be.legacy.AuthCronChimeraService.b(:com.google.android.gms:4049)
at ecm.call(:com.google.android.gms:2041)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at llt.run(:com.google.android.gms:450)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
at lqc.run(:com.google.android.gms:17)
at java.lang.Thread.run(Thread.java:761)
07-16 15:48:35.848 22740-22740/com.example.sumeet.kalwardirectorytry1 W/ClassMapper: No setter/field for dp_URL found on class com.example.sumeet.kalwardirectorytry1.Member_Pojo (fields/setters are case sensitive!)
07-16 15:48:35.851 22740-22740/com.example.sumeet.kalwardirectorytry1 E/myTag: onDataChange: Sumeet
07-16 15:48:35.852 22740-22740/com.example.sumeet.kalwardirectorytry1 W/ClassMapper: No setter/field for dp_URL found on class com.example.sumeet.kalwardirectorytry1.Member_Pojo (fields/setters are case sensitive!)
07-16 15:48:35.852 22740-22740/com.example.sumeet.kalwardirectorytry1 E/myTag: onDataChange: Sumeet Shah
07-16 15:48:35.855 22740-22783/com.example.sumeet.kalwardirectorytry1 V/FA: Inactivity, disconnecting from the service
07-16 15:48:35.894 22740-22740/com.example.sumeet.kalwardirectorytry1 W/Settings: Setting airplane_mode_on has moved from android.provider.Settings.System to android.provider.Settings.Global, returning read-only value.
07-16 15:48:35.912 22740-22740/com.example.sumeet.kalwardirectorytry1 E/myTag: URL is null
07-16 15:48:35.915 22740-22740/com.example.sumeet.kalwardirectorytry1 E/myTag: URL is null
07-16 15:48:38.917 3567-22923/? I/ContextCompilationHandl: Compiling grammar for: en-US, type=CONTACT_DIALING
07-16 15:48:38.922 3567-22923/? I/ContextCompilationHandl: No grammar compilation resources for COMPILER, aborting.
07-16 15:48:38.922 3567-22923/? I/ContextCompilationHandl: Compiling grammar for: en-US, type=HANDS_FREE_COMMANDS
07-16 15:48:38.923 3567-22923/? I/ContextCompilationHandl: No grammar compilation resources for COMPILER, aborting.
07-16 15:48:38.923 3567-22923/? I/ContextCompilationHandl: Compiling grammar for: en-US, type=CONTACT_NAMES
07-16 15:48:38.927 3567-22923/? I/ContextCompilationHandl: No grammar compilation resources for VOICE_ACTIONS_COMPILER, aborting.
07-16 15:48:38.928 3567-22923/? I/ContextCompilationHandl: Compiling grammar for: en-US, type=APP_NAMES
07-16 15:48:38.930 3567-22923/? I/ContextCompilationHandl: No grammar compilation resources for VOICE_ACTIONS_COMPILER, aborting.
07-16 15:48:38.930 3567-22923/? I/ContextCompilationHandl: Compiling grammar for: en-US, type=MUSIC_NAMES
07-16 15:48:38.934 3567-22923/? I/ContextCompilationHandl: No grammar compilation resources for VOICE_ACTIONS_COMPILER, aborting.
07-16 15:48:40.274 22740-22783/com.example.sumeet.kalwardirectorytry1 V/FA: Session started, time: 1485812
07-16 15:48:40.281 22740-22783/com.example.sumeet.kalwardirectorytry1 I/FA: Tag Manager is not found and thus will not be used
07-16 15:48:40.288 22740-22783/com.example.sumeet.kalwardirectorytry1 D/FA: Logging event (FE): _s, Bundle[{_o=auto, _sc=HomeSearchActivity, _si=-7738148218987138517}]
07-16 15:48:40.306 22740-22783/com.example.sumeet.kalwardirectorytry1 V/FA: Using measurement service
07-16 15:48:40.306 22740-22783/com.example.sumeet.kalwardirectorytry1 V/FA: Connecting to remote service
07-16 15:48:40.317 22740-22783/com.example.sumeet.kalwardirectorytry1 D/FA: Connected to remote service
07-16 15:48:40.317 22740-22783/com.example.sumeet.kalwardirectorytry1 V/FA: Processing queued up service tasks: 1
07-16 15:48:40.335 3533-22811/com.google.android.gms V/FA-SVC: Logging event: origin=auto,name=_s,params=Bundle[mParcelledData.dataSize=120]
07-16 15:48:40.340 3533-22811/com.google.android.gms V/FA-SVC: Saving event, name, data size: _s, 64
07-16 15:48:40.341 3533-22811/com.google.android.gms V/FA-SVC: Event recorded: Event{appId='com.example.sumeet.kalwardirectorytry1', name='_s', params=Bundle[{_o=auto, _sc=HomeSearchActivity, _si=-7738148218987138517}]}
07-16 15:48:40.345 3533-22811/com.google.android.gms V/FA-SVC: Upload scheduled in approximately ms: 2374370
07-16 15:48:40.347 3533-22811/com.google.android.gms V/FA-SVC: Background event processing time, ms: 12
07-16 15:48:45.335 22740-22783/com.example.sumeet.kalwardirectorytry1 V/FA: Inactivity, disconnecting from the service
07-16 15:49:27.772 3567-3567/? I/GrammarCompilationSvcCt: #startService for null, APP_NAMES.
07-16 15:49:27.777 3567-23636/? I/ContextCompilationHandl: Compiling grammar for: en-US, type=APP_NAMES
Can you Please let me know where am I going wrong on this? Any Help On this is really appreciated.