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firebaseデータベースのすべてのアイテムが必要なので、私はこのアイテムを取り込むためにrecyclerviewを使用しました。 recylerviewのアクティビティが呼び出されると、アプリケーションがクラッシュして致命的なエラーが発生します。Firebaseベースのリサイクルビュー - Firebaseを使用する前にFirebase.setAndroidContext（）を使用してAndroidコンテキストを設定する必要があります
これは私のコード私は間違っランタイム
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.zuke.zukevalet, PID: 9243
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.zuke.zukevalet/com.example.zuke.zukevalet.RequestPendingActivity}: java.lang.RuntimeException: You need to set the Android context using Firebase.setAndroidContext() before using Firebase.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2548)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
Caused by: java.lang.RuntimeException: You need to set the Android context using Firebase.setAndroidContext() before using Firebase.
at com.firebase.client.core.Context.getPlatform(Context.java:45)
at com.firebase.client.core.Context.ensureLogger(Context.java:218)
at com.firebase.client.core.Context.initServices(Context.java:105)
at com.firebase.client.core.Context.freeze(Context.java:92)
at com.firebase.client.core.RepoManager.getLocalRepo(RepoManager.java:55)
at com.firebase.client.core.RepoManager.getRepo(RepoManager.java:19)
at com.firebase.client.Firebase.<init>(Firebase.java:172)
at com.firebase.client.Firebase.<init>(Firebase.java:177)
at com.firebase.client.Firebase.<init>(Firebase.java:155)
at com.example.zuke.zukevalet.RequestPendingActivity.<init>(RequestPendingActivity.java:21)
at java.lang.Class.newInstance(Native Method)
at android.app.Instrumentation.newActivity(Instrumentation.java:1078)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2538)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
W/DynamiteModule: Local module descriptor class for com.google.firebase.auth not found.
で
私のjavaファイル
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.ListView;
import android.widget.TextView;
import com.firebase.client.Firebase;
import com.firebase.geofire.GeoFire;
import com.firebase.ui.FirebaseListAdapter;
import com.firebase.ui.FirebaseRecyclerAdapter;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
public class RequestPendingActivity extends AppCompatActivity {
RecyclerView RequestListView;
Firebase ref = new Firebase("https://simplyparc.firebaseio.com/Valet Requests Location");
private DatabaseReference mDatabase;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_request_pending);
RequestListView = (RecyclerView) findViewById(R.id.RequestListView);
RequestListView.setHasFixedSize(true);
RequestListView.setLayoutManager(new LinearLayoutManager(this));
GeoFire geoFire = new GeoFire(mDatabase);
}
@Override
protected void onStart(){
super.onStart();
FirebaseRecyclerAdapter<String, MessageViewHolder> adapter = new FirebaseRecyclerAdapter<String, MessageViewHolder>(String.class, android.R.layout.two_line_list_item, MessageViewHolder.class, ref) {
@Override
protected void populateViewHolder(MessageViewHolder messageViewHolder, String s, int i) {
messageViewHolder.mText.setText(s);
}
};
RequestListView.setAdapter(adapter);
}
public static class MessageViewHolder extends RecyclerView.ViewHolder{
TextView mText;
public MessageViewHolder(View v){
super(v);
mText = (TextView) v.findViewById(android.R.id.text1);
}
}
}
マイアンドロイドマニフェストファイル
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".FirstActivity"
android:theme="@style/AppTheme.NoActionBar"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".PendingSelectorActivity"
android:label="Select Pending task"
android:screenOrientation="portrait"/>
<activity
android:name=".RequestPendingActivity"
android:label="Pending Request"
android:screenOrientation="portrait"/>
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="@string/google_maps_key"/>
<activity
android:name=".RequestAcceptMapActivity"
android:label="@string/title_activity_request_accept_map"
android:screenOrientation="portrait"/>
<activity
android:name=".DropOffActivity"
android:label="Drop-Off Request"
android:screenOrientation="portrait"/>
</application>
致命的なエラーが発生しているのですか？