本文介绍了在 performFiltering() 期间发生 Realm Android 异常！的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
当我使用 Spinner 时，该应用运行良好.但是当我尝试使用 AutoComplete Textview 而不是 Spinner 时，当我在上面输入时没有显示任何内容.任何帮助表示赞赏.
The app worked fine when I used Spinner. But when I tried AutoComplete Textview instead of Spinner, nothing is displayed when I type on it. Any help is appreciated.
Logcat 警告:
08-23 14:01:13.485 9542-9542/com.vyshnav.realmexample W/art: Failed to find OatDexFile for DexFile /data/data/com.vyshnav.realmexample/files/instant-run/dex/slice-slice_9-classes.dex ( canonical path /data/data/com.vyshnav.realmexample/files/instant-run/dex/slice-slice_9-classes.dex) with checksum 0x0486ffcc in OatFile /data/data/com.vyshnav.realmexample/cache/slice-slice_9-classes.dex
08-23 14:01:14.237 9542-9542/com.vyshnav.realmexample W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
08-23 14:01:14.769 9542-9595/com.vyshnav.realmexample E/GED: Failed to get GED Log Buf, err(0)
08-23 14:01:14.839 9542-9595/com.vyshnav.realmexample W/MALI: glDrawArrays:714: [MALI] glDrawArrays takes more than 5ms here. Total elapse time(us): 12482
08-23 14:01:20.502 9542-9668/com.vyshnav.realmexample W/Filter: An exception occured during performFiltering()!
java.lang.IllegalStateException: Realm access from incorrect thread. Realm objects can only be accessed on the thread they were created.
at io.realm.BaseRealm.checkIfValid(BaseRealm.java:449)
at io.realm.RealmResults.isLoaded(RealmResults.java:872)
at io.realm.RealmResults.size(RealmResults.java:372)
at java.util.AbstractCollection.toArrayList(AbstractCollection.java:348)
at java.util.AbstractCollection.toArray(AbstractCollection.java:339)
at java.util.ArrayList.<init>(ArrayList.java:97)
at android.widget.ArrayAdapter$ArrayFilter.performFiltering(ArrayAdapter.java:456)
at android.widget.Filter$RequestHandler.handleMessage(Filter.java:234)
at android.os.Handler.dispatchMessage(Handler.java:111)
at android.os.Looper.loop(Looper.java:194)
at android.os.HandlerThread.run(HandlerThread.java:61)
08-23 14:01:35.351 9542-9811/com.vyshnav.realmexample W/Filter: An exception occured during performFiltering()!
java.lang.NullPointerException: collection == null
at java.util.ArrayList.<init>(ArrayList.java:94)
at android.widget.ArrayAdapter$ArrayFilter.performFiltering(ArrayAdapter.java:456)
at android.widget.Filter$RequestHandler.handleMessage(Filter.java:234)
at android.os.Handler.dispatchMessage(Handler.java:111)
at android.os.Looper.loop(Looper.java:194)
at android.os.HandlerThread.run(HandlerThread.java:61)
08-23 14:01:44.516 9542-9899/com.vyshnav.realmexample W/Filter: An exception occured during performFiltering()!
java.lang.NullPointerException: collection == null
at java.util.ArrayList.<init>(ArrayList.java:94)
at android.widget.ArrayAdapter$ArrayFilter.performFiltering(ArrayAdapter.java:456)
at android.widget.Filter$RequestHandler.handleMessage(Filter.java:234)
at android.os.Handler.dispatchMessage(Handler.java:111)
at android.os.Looper.loop(Looper.java:194)
at android.os.HandlerThread.run(HandlerThread.java:61)
MinActivity.java:
MinActivity.java:
package com.vyshnav.realmexample;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Spinner;
import io.realm.Realm;
import io.realm.RealmChangeListener;
import io.realm.RealmConfiguration;
import io.realm.RealmResults;
public class MainActivity extends AppCompatActivity {
private Realm realm;
private RealmConfiguration realmConfig;
private String[] listOfStationNames;
ArrayAdapter adapter;
AutoCompleteTextView autoCompleteTextView1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//toolbar
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//fab
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
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();
}
});
listOfStationNames = new String[] {"vvv", "rrr"};
autoCompleteTextView1= (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);
// field variable
RealmResults<Station> stations;
// field variable
RealmChangeListener<RealmResults<Station>> changeListener = new RealmChangeListener<RealmResults<Station>>() {
@Override
public void onChange(RealmResults<Station> results) {
// handle onSuccess()
}
};
// Create the Realm configuration // In-Memory realm
realmConfig = new RealmConfiguration.Builder(this).name("myrealm.realm").inMemory().build();
// Open the Realm for the UI thread.
realm = Realm.getInstance(realmConfig);
// Call basicWrite
basicWrite(realm);
// Read
stations = realm.where(Station.class).findAll();
stations.addChangeListener(changeListener);
adapter=new ArrayAdapter(this,android.R.layout.simple_list_item_1,stations);
autoCompleteTextView1.setAdapter(adapter);
}
private void basicWrite(Realm realm) {
//(incase of using Callback) watch Slidenerd's approach 'AsyncTask transaction = realm.execute.....' and then closing transaction
realm.executeTransactionAsync(new Realm.Transaction() {
@Override
public void execute(Realm realm) {
Station station = new Station();
for(String stationName : listOfStationNames) {
station.setName(stationName);
realm.insert(station);
}
}
});}
@Override
protected void onDestroy() {
super.onDestroy();
realm.close(); // Remember to close Realm when done.
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
Station.java:
Station.java:
package com.vyshnav.realmexample;
import io.realm.RealmObject;
public class Station extends RealmObject {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String toString(){//overriding the toString() method
return name;
}
}
推荐答案
在 publishResults() 中评估过滤器而不是 performFiltering()，因为应该执行 Realm 查询在要访问结果的线程上.
Evaluate the filter in publishResults() instead of performFiltering(), because Realm queries should be executed on the thread where you want to access the results.
您需要覆盖performFiltering ArrayAdapter 的方法，有点像这个人做的.
You'll need to override the performFiltering method of ArrayAdapter, kinda like this guy did.
(另外，现在我考虑了一下，将 ArrayAdapter 更改为 RealmBaseAdapter ~ source，或者至少手动使用 RealmChangeListener 处理自动更新.)
(Also, now that I think about it, it might probably be a good idea for you to change your ArrayAdapter into a RealmBaseAdapter ~ source, or at least handle automatic updates with a RealmChangeListener manually.)
这篇关于在 performFiltering() 期间发生 Realm Android 异常！的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！