Question

我从谷歌下载项目示例（LocationUpdates.zip，http://developer.android.com/training/location/retrieve-current.html）。当我运行它时，它显示如下异常，但并非总是如此：

08-10 16:10:34.119: W/System.err(26914): java.lang.NumberFormatException: Invalid int: ""
08-10 16:10:34.127: W/System.err(26914):    at java.lang.Integer.invalidInt(Integer.java:138)
08-10 16:10:34.127: W/System.err(26914):    at java.lang.Integer.parseInt(Integer.java:359)
08-10 16:10:34.127: W/System.err(26914):    at java.lang.Integer.parseInt(Integer.java:332)
08-10 16:10:34.127: W/System.err(26914):    at java.util.Calendar.getHwFirstDayOfWeek(Calendar.java:807)
08-10 16:10:34.127: W/System.err(26914):    at java.util.Calendar.<init>(Calendar.java:745)
08-10 16:10:34.127: W/System.err(26914):    at java.util.GregorianCalendar.<init>(GregorianCalendar.java:338)
08-10 16:10:34.127: W/System.err(26914):    at java.util.GregorianCalendar.<init>(GregorianCalendar.java:325)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.asn1.ASN1Time.getDecodedObject(ASN1Time.java:44)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.asn1.ASN1UTCTime.decode(ASN1UTCTime.java:82)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.asn1.ASN1Choice.decode(ASN1Choice.java:308)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.asn1.BerInputStream.readSequence(BerInputStream.java:554)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.asn1.DerInputStream.readSequence(DerInputStream.java:105)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.asn1.ASN1Sequence.decode(ASN1Sequence.java:40)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.asn1.BerInputStream.readSequence(BerInputStream.java:554)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.asn1.DerInputStream.readSequence(DerInputStream.java:105)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.asn1.ASN1Sequence.decode(ASN1Sequence.java:40)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.asn1.BerInputStream.readSequence(BerInputStream.java:554)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.asn1.DerInputStream.readSequence(DerInputStream.java:105)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.asn1.ASN1Sequence.decode(ASN1Sequence.java:40)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.asn1.ASN1Type.decode(ASN1Type.java:91)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.provider.cert.X509CertImpl.<init>(X509CertImpl.java:102)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.provider.cert.X509CertFactoryImpl.getCertificate(X509CertFactoryImpl.java:656)
08-10 16:10:34.127: W/System.err(26914):    at org.apache.harmony.security.provider.cert.X509CertFactoryImpl.engineGenerateCertificate(X509CertFactoryImpl.java:109)
08-10 16:10:34.127: W/System.err(26914):    at java.security.cert.CertificateFactory.generateCertificate(CertificateFactory.java:195)
08-10 16:10:34.135: W/System.err(26914):    at com.google.android.gms.common.GooglePlayServicesUtil.a(Unknown Source)
08-10 16:10:34.135: W/System.err(26914):    at com.google.android.gms.common.GooglePlayServicesUtil.isGooglePlayServicesAvailable(Unknown Source)
08-10 16:10:34.135: W/System.err(26914):    at com.google.android.gms.internal.p.connect(Unknown Source)
08-10 16:10:34.135: W/System.err(26914):    at com.google.android.gms.location.LocationClient.connect(Unknown Source)
08-10 16:10:34.135: W/System.err(26914):    at com.example.android.location.MainActivity.onStart(MainActivity.java:197)
08-10 16:10:34.135: W/System.err(26914):    at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1133)
08-10 16:10:34.135: W/System.err(26914):    at android.app.Activity.performStart(Activity.java:4475)
08-10 16:10:34.135: W/System.err(26914):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1929)
08-10 16:10:34.135: W/System.err(26914):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
08-10 16:10:34.135: W/System.err(26914):    at android.app.ActivityThread.access$600(ActivityThread.java:123)
08-10 16:10:34.135: W/System.err(26914):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
08-10 16:10:34.135: W/System.err(26914):    at android.os.Handler.dispatchMessage(Handler.java:99)
08-10 16:10:34.135: W/System.err(26914):    at android.os.Looper.loop(Looper.java:137)
08-10 16:10:34.135: W/System.err(26914):    at android.app.ActivityThread.main(ActivityThread.java:4424)
08-10 16:10:34.135: W/System.err(26914):    at java.lang.reflect.Method.invokeNative(Native Method)
08-10 16:10:34.135: W/System.err(26914):    at java.lang.reflect.Method.invoke(Method.java:511)
08-10 16:10:34.135: W/System.err(26914):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
08-10 16:10:34.135: W/System.err(26914):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558)
08-10 16:10:34.135: W/System.err(26914):    at dalvik.system.NativeStart.main(Native Method)

代码在这里：

public class MainActivity extends FragmentActivity implements
    LocationListener,
    GooglePlayServicesClient.ConnectionCallbacks,
    GooglePlayServicesClient.OnConnectionFailedListener {

// A request to connect to Location Services
private LocationRequest mLocationRequest;

// Stores the current instantiation of the location client in this object
private LocationClient mLocationClient;
......
}
......
public void onStart() {

    Log.i(TAG, "onStart of MainActivity");
    super.onStart();

    /*
     * Connect the client. Don't re-start any requests here;
     * instead, wait for onResume()
     */
    Log.i(TAG, "connect() of LocationClient begin");
    mLocationClient.connect();
    Log.i(TAG, "connect() of LocationClient finish");

}

例外是因为句子：

mLocationClient.connect();

当我尝试新建一个MimeMessage时，还有另一个项目，它会抛出一个完全相同的异常：NumberFormatException：

MimeMessage message = new MimeMessage(session);

事实上，在我的项目中，有很多场景都会抛出这种异常，即使我没有操作数字/时间相关的变量。这家伙跟我有同样的问题。 Android error in java InputStreamReader only with Huawei phone

我在这个例外中挣扎了很多天。我不知道为什么。希望一些Android专家可以帮助我。谢谢大家。我的手机是华为Ascend D1 dual。

Answer 1

您可能需要将LocationClient mLocationClient; 声明为类变量

Answer 2

您似乎已经声明了mLocationClient变量，但是在调用另一个方法（mLocationClient.connect（）方法）之前没有初始化它。

尝试将此添加到您的代码中。

mLocationClient = new LocationClient();

这将在调用该方法之前初始化变量。

如果已经处理过，那么请知道在调用mLocationClient.connect（）时，如果mLocationClient为null，则会给出错误。因此，在连接之前，如果其为null，则需要设置一个设置mLocationClient的条件。例如

public void onStart() {

    Log.i(TAG, "onStart of MainActivity");
    super.onStart();

    /*
     * Connect the client. Don't re-start any requests here;
     * instead, wait for onResume()
     */
    Log.i(TAG, "connect() of LocationClient begin");

    //Checks to see if LocationClient is not set and then sets it
    setUpLocationClientIfNull();
    mLocationClient.connect();
    Log.i(TAG, "connect() of LocationClient finish");

}

//And now the method to set up mLocationClient if its null
private void setUpLocationClientIfNull() {
   if (mLocationClient == null) {
       mLocationClient = new LocationClient(this, this, this);
   } 
}

这可以确保在调用mLocationClient.connect（）方法之前设置了mLocationClient。

Answer 3

服务器用于SSL的证书不完全遵循X.509标准，并且Apache Harmony证书解析器中断，因为它期望ASN.1 UTCTime及其创建的其他类型。

您无法替换服务器证书，您需要使用自己的SSL握手实现。

当我尝试调用LocationClient.connect（）时，我得到了NumberFormatException

3 个答案: