Question

我很难尝试解决这个糟糕的VerifyError，但无法找到解决方案。

我见过一些像this one或this one这样的线程，但我没有使用第三方库，也没有按照建议调用String.isEmpty（）。

我只使用supportv4和v7进行这些导入：

import android.support.v7.app.ActionBarActivity;  
import android.support.v4.app.FragmentManager;  
import android.support.v4.app.FragmentTransaction;  
import android.support.v4.app.LoaderManager;  
import android.support.v4.app.TaskStackBuilder;  
import android.support.v4.content.Loader;

我在MapActivity中的onCreate看起来像这样：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main_frame);

    if (mDataController == null) {
        mDataController = new DataController();
    }

    initData();

    FragmentTransaction fragmentTransaction = mFragmentManager.beginTransaction();
    fragmentTransaction.replace(R.id.container, mMapViewFragment, "MapViewFragment");
    fragmentTransaction.commit();
}

initData由此定义：

public void initData() {

    mListLines = Arrays.asList("ALL",
                  DataController.LINE_NAME_TRAM_1,
                  DataController.LINE_NAME_TRAM_2,
                  DataController.LINE_NAME_BUS_1);

    List<ArrayList<StationItem>> lAllStationsTemp = Arrays.asList(
                                        DataController.mTram1Stations,
                                        DataController.mTram2Stations,
                                        DataController.mBus1Stations);

    mAllStationsTramsBus = new ArrayList<StationItem>(DataController.mTram1Stations);
    for (int i=0; i<lAllStationsTemp.size(); i++) {
        List<StationItem> lCurrentLineStations = lAllStationsTemp.get(i);
        for (final StationItem lStationToInsert : lCurrentLineStations)
        {
            for (int j=0; j<mAllStationsTramsBus.size(); j++) {
                StationItem lCurrentStation = mAllStationsTramsBus.get(j);
                if (lStationToInsert.mStationName.equals(lCurrentStation.mStationName)) {
                    mAllStationsTramsBus.remove(j);
                }
            }
            mAllStationsTramsBus.add(lStationToInsert);
        }
    }

    //Sort results by station name property of object StationItem

    Collections.sort(mAllStationsTramsBus);

    mAllStations = new ArrayList<ArrayList<StationItem>>(Arrays.asList(
                    mAllStationsTramsBus,
                    mDataController.getStationListFromList(DataController.mTram1Stations),
                    mDataController.getStationListFromList(DataController.mTram2Stations),
                    mDataController.getStationListFromList(DataController.mBus1Stations)
                    ));


    List<ArrayList<StationItem>> lAllStationsTemp2 = Arrays.asList(
            DataController.mTram1Stations,
            DataController.mTram2Stations
            );


    mAllStationsTrams = new ArrayList<StationItem>(DataController.mTram1Stations);
    for (int i=0; i<lAllStationsTemp2.size(); i++) {
        List<StationItem> lCurrentLineStations = lAllStationsTemp2.get(i);
        for (final StationItem lStationToInsert : lCurrentLineStations)
        {
            for (int j=0; j<mAllStationsTrams.size(); j++) {
                StationItem lCurrentStation = mAllStationsTrams.get(j);
                if (lStationToInsert.mStationName.equals(lCurrentStation.mStationName)) {
                    mAllStationsTrams.remove(j);
                }
            }
            mAllStationsTrams.add(lStationToInsert);
        }
    }

    //Sort results by station name property of object StationItem

    Collections.sort(mAllStationsTrams);

    mMapViewFragment.mAllStations = mAllStations;
}

这里，我有3个警告：类型安全：为varargs参数创建了一个arrayList的通用数组。一个用于lAllStationsTemp，第二个用于mAllStations，最后一个用于lAllStationsTemp2。我不确定这个警告会改变我的问题，但它就在这里。

我的DataController包含：

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.PolylineOptions;

import android.graphics.Color;

public class DataController {

    public static final String STATION_1 = "Station 1";
    public static final String STATION_2 = "Station 2";

    public static final String LINE_NAME_TRAM_1 = "T1";
    public static final String LINE_NAME_TRAM_2 = "T2";

    public static final String LINE_NAME_BUS_1 = "B1";

    protected static ArrayList<StationItem>  mTram1Stations;
    protected static ArrayList<StationItem>  mTram2Stations;

    protected static ArrayList<StationItem>  mBus1Stations;

    protected static ArrayList<LatLng> mTram1Locations;
    protected static ArrayList<LatLng> mTram2Locations;

    public DataController() {

            ArrayList<String> lConnection_S1 = new ArrayList<String>(Arrays.asList("T1"));
            ArrayList<String> lConnection_S2 = new ArrayList<String>(Arrays.asList("T1", "T2"));

            mTram1Stations = new ArrayList<StationItem>(Arrays.asList(
            new StationItem("Station 1","T1",0,0,lConnection_S1),
            new StationItem("Station 2","T1",0,0,lConnection_S2)
            ));

            mTram2Stations = new ArrayList<StationItem>(Arrays.asList(
            new StationItem("Station 1","T2",0,0,lConnection_S1),
            new StationItem("Station 2","T2",0,0,lConnection_S2)
            ));

            mBus1Stations = new ArrayList<StationItem>(Arrays.asList(
            new StationItem("Station 1","B1",0,0,lConnection_S1),
            new StationItem("Station 2","B1",0,0,lConnection_S2)
            ));

            mTram1Locations = new ArrayList<LatLng>(Arrays.asList(
            new LatLng(40.190, 3.20),
            new LatLng(40.191, 3.21),
            new LatLng(40.192, 3.22)
            ));

            mTram2Locations = new ArrayList<LatLng>(Arrays.asList(
            new LatLng(40.190, 3.20),
            new LatLng(40.191, 3.21),
            new LatLng(40.192, 3.22)
            ));
    }

    public static ArrayList<StationItem> getmTram1Stations() {
            return mTram1Stations;
    }

    public static void setmTram1Stations(ArrayList<StationItem> mTram1Stations) {
            DataController.mTram1Stations = mTram1Stations;
    }

    public static ArrayList<StationItem> getmTram2Stations() {
            return mTram2Stations;
    }

    public static void setmTram2Stations(ArrayList<StationItem> mTram2Stations) {
            DataController.mTram2Stations = mTram2Stations;
    }

    public static ArrayList<StationItem> getmBus1Stations() {
            return mBus1Stations;
    }

    public static void setmBus1Stations(ArrayList<StationItem> mBus1Stations) {
            DataController.mBus1Stations = mBus1Stations;
    }

    public static PolylineOptions createPolylinefromArray(ArrayList<LatLng> pArray, String pLineName, int pZIndex) {
    if (pArray.size() > 1) {

        PolylineOptions lPolyline = new PolylineOptions();

        for (int i = 0; i < pArray.size(); i++) {
            lPolyline.add(pArray.get(i));
        }

        lPolyline.color(DataController.getColorForLine(pLineName));

        if (pLineName.equals("1")) {
            lPolyline.width(12);
        } else {
            lPolyline.width(7);
        } 
        lPolyline.zIndex(pZIndex);

        return lPolyline;
    }
    return null;
    }

    public ArrayList<StationItem> getStationListFromList(List<StationItem> pStationArray) {

        ArrayList<StationItem> lResult = new ArrayList<StationItem>();

        for (int i=0; i<pStationArray.size(); i++) {
            if (i == 0) {
                lResult.add(pStationArray.get(i));
            } else {
                StationItem lStation1 = pStationArray.get(i-1);
                StationItem lStation2 = pStationArray.get(i);
                if (!lStation1.mStationName.equals(lStation2.mStationName)) {
                    lResult.add(pStationArray.get(i));
                }
            }
        }
        return lResult;
    }

    public static final int getColorForLine(String pLine) {
        if (pLine.equals("1")) {
            return Color.rgb(65, 117, 189);
        } else {
            return Color.rgb(169, 169, 169);
        }
    }

    public static final int getStationDrawableForLine(String pLine) {

        if (pLine.equals("1")) {
            return R.drawable.station_1;
        } else {
            return R.drawable.station;
        }
    }
}

我的堆栈跟踪如下：

java.lang.VerifyError: com.test.DataController
at com.test.MapActivity.onCreate(MapActivity.java:426)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
at android.app.ActivityThread.access$2300(ActivityThread.java:125)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4627)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:876)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:634)
at dalvik.system.NativeStart.main(Native Method)

为了确保我提供了所有细节，以下是我的构建路径的屏幕截图： Build Path 1 Build Path 2 Build Path 3

任何建议都将不胜感激。 Android 2.2上发生此错误。谢谢你的帮助。

Answer 1

好的，我刚刚找到了这个错误的原因。几个星期后，我不得不要求找到它：）

我专注于发生此错误的常见情况，但我的代码没有错。我没有看到这个警告：“VFY：任意拒绝大方法（regs = 93 count = 23019）”。

看来我的构造函数中声明了太多变量，导致内存管理问题as explained here。

我的构造函数是这样的：

public DataController() {

    ArrayList<String> lConnection_S1 = new ArrayList<String>(Arrays.asList("T1"));
    ArrayList<String> lConnection_S2 = new ArrayList<String>(Arrays.asList("T1", "T2"));
    ...
    ArrayList<String> lConnection_S2034 = new ArrayList<String>(Arrays.asList("T1", "T2"));

    mTram1Stations = new ArrayList<StationItem>(Arrays.asList(
        new StationItem("Station 1","T1",0,0,lConnection_S1),
        new StationItem("Station 2","T1",0,0,lConnection_S2)
    ));

    mBus1Stations = new ArrayList<StationItem>(Arrays.asList(
        new StationItem("Station 1","B1",0,0,lConnection_S1),
        new StationItem("Station 2","B1",0,0,lConnection_S2)
    ));

    mTram1Locations = new ArrayList<LatLng>(Arrays.asList(
        new LatLng(40.190, 3.20),
        new LatLng(40.191, 3.21),
        new LatLng(40.192, 3.22)
    ));
}

我没有编写所有变量，因为它不可读，但正如你所看到的，它会升级到lConnection_S2034，并在Android 2.2上引发VerifyError。

我为解决我的问题所做的是将这些局部变量声明为实例变量，并在构造函数中初始化它们，如下所示：

public class DataController {

    ArrayList<String> mConnection_S1;
    ArrayList<String> mConnection_S2;
    ...
    ArrayList<String> mConnection_S2034;

    public DataController() {

        mConnection_S1 = new ArrayList<String>(Arrays.asList("T1"));
        mConnection_S2 = new ArrayList<String>(Arrays.asList("T1", "T2"));
        ...
        mConnection_S2034 = new ArrayList<String>(Arrays.asList("T1", "T2"));
    }
}

Answer 2

我在Kotlin项目中遇到了同样的错误。完全驱使我疯狂找到原因。这是我修复它的方式

崩溃的错误代码：

// MyClass is a class containing a String attribute called "text"
// et_text is an EditText
val c = MyClass(
                text = et_text.text?.toString()?.trim() ?: ""
        )

解决方案：

val txt = et_text.text?.toString()?.trim() ?: ""
val c = MyClass(
    text = txt
)

我不知道确切的原因，但我可以确保第一个代码崩溃，而第二个代码没有崩溃。不得不在MyClass初始化之前进行EditText字符串处理，而不是在其中。

Kotlin 1.1.4, build tools 25.0.3, support library 25.4.0

希望这可以节省时间给别人：）

在onCreate（）中创建的类中遇到Java.lang.VerifyError

2 个答案: