我有2节课。我从我的菜单类调用一个intent，当我调用intent到我的MainActivity类时，它给了我一个错误，上面写着，不幸的是，app name已经停止了。我需要帮助搞清楚发生了什么。我知道这是因为MainActivity中存在错误。我只是需要帮助找到它。
这是MainActivity.java的代码：
package com.arborhillsvet.arborhillsveterinarianclinic;
import android.app.AlertDialog;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.AnimationUtils;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ViewAnimator;
import com.parse.FindCallback;
import com.parse.Parse;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.ParsePush;
import com.parse.ParseQuery;
import com.parse.SaveCallback;
import java.util.List;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Parse.enableLocalDatastore(this);
Parse.initialize(this, "parse information", "parse information");
ParsePush.subscribeInBackground("", new SaveCallback() {
@Override
public void done(ParseException e) {
if (e == null) {
Log.d("com.parse.push", "successfully subscribed to the broadcast channel.");
} else {
Log.e("com.parse.push", "failed to subscribe for push", e);
}
}
});
WebView appointWeb = (WebView) findViewById(R.id.appointments);
appointWeb.loadUrl("https://www.google.com");
WebSettings webSettings = appointWeb.getSettings();
webSettings.setJavaScriptEnabled(true);
appointWeb.setWebViewClient(new WebViewClient());
WebView promosWeb = (WebView) findViewById(R.id.promos);
promosWeb.loadUrl("https://www.yahoo.com");
WebSettings webSettings2 = promosWeb.getSettings();
webSettings2.setJavaScriptEnabled(true);
promosWeb.setWebViewClient(new WebViewClient());
WebView infoWeb = (WebView) findViewById(R.id.info);
infoWeb.loadUrl("https://www.bing.com");
WebSettings webSettings3 = infoWeb.getSettings();
webSettings3.setJavaScriptEnabled(true);
infoWeb.setWebViewClient(new WebViewClient());
WebView medsWeb = (WebView) findViewById(R.id.medicines);
medsWeb.loadUrl("https://www.aol.com");
WebSettings webSettings4 = medsWeb.getSettings();
webSettings4.setJavaScriptEnabled(true);
medsWeb.setWebViewClient(new WebViewClient());
Button next = (Button) findViewById(R.id.next);
View.OnClickListener listener = new View.OnClickListener() {
@Override
public void onClick(View view) {
ViewAnimator anim = (ViewAnimator) findViewById(R.id.views);
anim.showNext();
}
};
next.setOnClickListener(listener);
Button prev = (Button) findViewById(R.id.prev);
View.OnClickListener listener2 = new View.OnClickListener() {
public void onClick(View view) {
ViewAnimator anim = (ViewAnimator) findViewById(R.id.views);
anim.showPrevious();
}
};
prev.setOnClickListener(listener2);
ImageButton menu = (ImageButton) findViewById(R.id.menu);
View.OnClickListener listener3 = new View.OnClickListener() {
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, menu.class);
startActivity(intent);
}
};
menu.setOnClickListener(listener3);
}
}
我也编辑过这篇文章，并在有人要求之后添加了Logcat。我想我看到了错误，看起来好像是Parse.initialize和Parse.enableLocalDatastore方法有问题，虽然我没有看到它们的位置有什么问题。我想知道我是否需要让线程休眠几秒钟，以便本地数据存储可以先加载。我不确定，但这里是Logcat。
>08-17 19:39:03.018 4601-4601/com.arborhillsvet.arborhillsveterinarianclinic E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.arborhillsvet.arborhillsveterinarianclinic, PID: 4601
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.arborhillsvet.arborhillsveterinarianclinic/com.arborhillsvet.arborhillsveterinarianclinic.MainActivity}: java.lang.IllegalStateException: `Parse#enableLocalDatastore(Context)` must be invoked before `Parse#initialize(Context)`
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2390)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5257)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.IllegalStateException: `Parse#enableLocalDatastore(Context)` must be invoked before `Parse#initialize(Context)`
at com.parse.Parse.enableLocalDatastore(Parse.java:58)
at com.arborhillsvet.arborhillsveterinarianclinic.MainActivity.onCreate(MainActivity.java:36)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2390)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5257)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
我需要帮助！拜托，谢谢你。
答案 0 :(得分：0)
我想您必须在Application课程中初始化可能会出现问题，因为您在MainActivity初始化
这样做
public class ParseApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
ParseCrashReporting.enable(this);
Parse.enableLocalDatastore(this);
Parse.initialize(this, "xxx", "xxx");
}
}