Question

执行活动后的应用程序错误。

错误：D / AndroidRuntime：关闭VM E / AndroidRuntime：致命例外：主要处理：activity.rama.navigationtaskbartraining，PID：9385 java.lang.RuntimeException：无法启动活动ComponentInfo {activity.rama.navigationtaskbartraining / activity.rama.navigationtaskbartraining.FoldableActivity}： java.lang.RuntimeException：无法绑定视图 activity.rama.navigationtaskbartraining.FoldableActivity 在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2646）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2707）在android.app.ActivityThread.-wrap12（ActivityThread.java）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1460）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:154）在android.app.ActivityThread.main（ActivityThread.java:6077） at java.lang.reflect.Method.invoke（Native Method）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:865）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:755）引起：java.lang.RuntimeException：无法绑定视图 activity.rama.navigationtaskbartraining.FoldableActivity 在butterknife.ButterKnife.bind（ButterKnife.java:322）在butterknife.ButterKnife.bind（ButterKnife.java:237） at activity.rama.navigationtaskbartraining.FoldableActivity.onCreate（FoldableActivity.java:55）在android.app.Activity.performCreate（Activity.java:6662）在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1118）在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2599）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2707）在android.app.ActivityThread.-wrap12（ActivityThread.java）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1460）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:154）在android.app.ActivityThread.main（ActivityThread.java:6077） at java.lang.reflect.Method.invoke（Native Method）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:865）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:755）引起：java.lang.IllegalStateException：对于字段ID为2131624097的必需视图'recycler_view' 找不到'mRecyclerView'。如果此视图是可选的添加 '@Nullable'注释。在butterknife.ButterKnife $ Finder.findRequiredView（ButterKnife.java:140） at activity.rama.navigationtaskbartraining.FoldableActivity $$ ViewBinder.bind（FoldableActivity $$ ViewBinder.java:11） at activity.rama.navigationtaskbartraining.FoldableActivity $$ ViewBinder.bind（FoldableActivity $$ ViewBinder.java:8）在butterknife.ButterKnife.bind（ButterKnife.java:319）在butterknife.ButterKnife.bind（ButterKnife.java:237） at activity.rama.navigationtaskbartraining.FoldableActivity.onCreate（FoldableActivity.java:55）在android.app.Activity.performCreate（Activity.java:6662）在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1118）在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2599）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2707）在android.app.ActivityThread.-wrap12（ActivityThread.java）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1460）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:154）在android.app.ActivityThread.main（ActivityThread.java:6077） at java.lang.reflect.Method.invoke（Native Method）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:865）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:755）

/*
 * Copyright 2015 Worldline.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package activity.rama.navigationtaskbartraining;

import android.graphics.Rect;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.View;

import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.appindexing.Thing;
import com.google.android.gms.common.api.GoogleApiClient;

import java.io.IOException;

import butterknife.Bind;
import butterknife.ButterKnife;

public class FoldableActivity extends AppCompatActivity {

    @Bind(R.id.recycler_view)
    protected RecyclerView mRecyclerView;

    @Bind(R.id.toolbar)
    protected Toolbar mToolbar;
    /**
     * ATTENTION: This was auto-generated to implement the App Indexing API.
     * See https://g.co/AppIndexing/AndroidStudio for more information.
     */
    private GoogleApiClient client;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.foldable_layout);
        ButterKnife.bind(this);
        setSupportActionBar(mToolbar);

        String[] dataSet = null;
        try {
            dataSet = getAssets().list("demo-pictures");
        } catch (IOException e) {
            e.printStackTrace();
        }
        PhotoAdapter adapter = new PhotoAdapter(dataSet, this);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        mRecyclerView.addItemDecoration(new RecyclerView.ItemDecoration() {
            @Override
            public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
                super.getItemOffsets(outRect, view, parent, state);
                outRect.bottom = getResources().getDimensionPixelSize(R.dimen.activity_vertical_margin);
            }
        });
        mRecyclerView.setAdapter(adapter);
        // ATTENTION: This was auto-generated to implement the App Indexing API.
        // See https://g.co/AppIndexing/AndroidStudio for more information.
        client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
    }

    /**
     * ATTENTION: This was auto-generated to implement the App Indexing API.
     * See https://g.co/AppIndexing/AndroidStudio for more information.
     */
    public Action getIndexApiAction() {
        Thing object = new Thing.Builder()
                .setName("Foldable Page") // TODO: Define a title for the content shown.
                // TODO: Make sure this auto-generated URL is correct.
                .setUrl(Uri.parse("http://[ENTER-YOUR-URL-HERE]"))
                .build();
        return new Action.Builder(Action.TYPE_VIEW)
                .setObject(object)
                .setActionStatus(Action.STATUS_TYPE_COMPLETED)
                .build();
    }

    @Override
    public void onStart() {
        super.onStart();

        // ATTENTION: This was auto-generated to implement the App Indexing API.
        // See https://g.co/AppIndexing/AndroidStudio for more information.
        client.connect();
        AppIndex.AppIndexApi.start(client, getIndexApiAction());
    }

    @Override
    public void onStop() {
        super.onStop();

        // ATTENTION: This was auto-generated to implement the App Indexing API.
        // See https://g.co/AppIndexing/AndroidStudio for more information.
        AppIndex.AppIndexApi.end(client, getIndexApiAction());
        client.disconnect();
    }
}

Answer 1

使用@BindView()，@绑定是旧注释。你用的是什么版本的奶油刀？应该像

compile 'com.jakewharton:butterknife:8.5.1'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.5.1'

话虽如此，ButterKnife告诉你的是

必填视图＆＃39; recycler_view＆＃39;字段ID为2131624097 ＆＃39; mRecyclerView＆＃39;没找到。

这意味着您的R.layout.foldable_layout不包含ID为R.id.recycler_view的RecyclerView小部件。

Answer 2

我之所以回答这个问题，是因为也许有些人会因为做出简单的错误而看到此错误，并通过我的回答轻松解决，尽管在发布问题的时间和现在之间存在巨大的时间间隔。

可能您在视图R.id.recycler_view中忘记或打错了文字。

java.lang.IllegalStateException：具有ID的必需视图“ recycler_view” 找不到字段“ mRecyclerView”的2131624097。

此错误行显示了导致此错误的组件。检查您的XML文件和此componenet的ID并进行修复。就这样。同样如Martin所说，在黄油刀的更新版本中建议使用@BindView()。

Butter Knife @bind in Activity错误

2 个答案: