从db中获取特定行时抛出的数字格式异常

Question

我从db的特定行获取所有记录，如下所示，

  public StatutoryModel getStatutoryRow(int id) {
        SQLiteDatabase db = this.getReadableDatabase();

        Cursor cursor = db.query(TABLE_KNOWLEDGE_STATUTORY, new String[] { KEY_ID,
                        KEY_STATUTORY_MAPPING, KEY_LOCATION, KEY_DESCRIPTION,KEY_ACTIVE,KEY_PROVISION,KEY_COMPLIANCE_TASK,KEY_FORMAT_FILE_LIST,KEY_DURATION,KEY_DOC_NAME,KEY_PENAL_CONSEQUENCE,KEY_DURATION_ID,KEY_FREQUENCY_ID,KEY_REPEAT_FREQ,KEY_COMPLIANCE_ID,KEY_REPEAT_TYPE_ID,KEY_STATUTORY_MONTH}, KEY_ID + "=?",
                new String[] { String.valueOf(id) }, null, null, null, null);
        if (cursor != null)
            cursor.moveToFirst();

        StatutoryModel contact = new StatutoryModel(Integer.parseInt(cursor.getString(0)), cursor.getString(1), cursor.getString(2), cursor.getString(3), cursor.getString(4), cursor.getString(5), cursor.getString(6), cursor.getString(7), cursor.getString(8), cursor.getString(9), Integer.parseInt(cursor.getString(10)), cursor.getString(11), cursor.getString(12), Integer.parseInt(cursor.getString(13)), cursor.getString(14), cursor.getString(15), cursor.getString(16), cursor.getString(17), cursor.getString(18), cursor.getString(19));
        // return contact
        return contact;
    }

我调用它如下，

Db.getInstance(getApplicationContext()).getStatutoryRow(1).getDescription()

问题是，当我尝试这样做时，我会获得numberformatexception。以下是我的错误日志

java.lang.RuntimeException: Unable to start activity
 ComponentInfo{com.activities/com.activities.StatutoryDecision}:
java.lang.NumberFormatException: Invalid int: ""
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2295)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349)
at android.app.ActivityThread.access$700(ActivityThread.java:159)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:5419)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NumberFormatException: Invalid int: ""
at java.lang.Integer.invalidInt(Integer.java:138)
at java.lang.Integer.parseInt(Integer.java:359)
at java.lang.Integer.parseInt(Integer.java:332)
at com.Controllers.Db.getStatutoryRow(Db.java:292)
at com.activities.StatutoryDecision.onCreate(StatutoryDecision.java:44)
at android.app.Activity.performCreate(Activity.java:5372)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1104)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2257)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349) 
at android.app.ActivityThread.access$700(ActivityThread.java:159) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:176) 
at android.app.ActivityThread.main(ActivityThread.java:5419) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:525) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862) 
at dalvik.system.NativeStart.main(Native Method)

以下是我的模型类

public class StatutoryModel {
    private int id;
    private String description;
    private String isStatutoryActive;
    private String statutoryProvision;
    private String complianceTask;
    private String format_fileList;
    private String duration;
    private String document_name;
    private String penalConsequences;
    private String durationType_id;
    private int frequencyId;
    private String repeatsEvery;
    private int complianceId;
    private String repeatsTypeId;
    String statutory_month;
    private  String statutory_date;
    private String trigger_before_days;
    private String repeat_by;
    private String statuoryMapping;
    private String location;



    private static StatutoryModel ourInstance = new StatutoryModel();

    public static StatutoryModel getInstance() {
        return ourInstance;
    }

    public StatutoryModel() {
    }

    public StatutoryModel(int id, String description, String isStatutoryActive, String statutoryProvision, String complianceTask, String format_fileList, String duration, String penalConsequences, String document_name, String durationType_id, int frequencyId, String repeatsEvery, String repeatsTypeId, int complianceId, String statutory_month, String statutory_date, String trigger_before_days, String repeat_by, String statuoryMapping, String location) {
        this.id = id;
        this.description = description;
        this.isStatutoryActive = isStatutoryActive;
        this.statutoryProvision = statutoryProvision;
        this.complianceTask = complianceTask;
        this.format_fileList = format_fileList;
        this.duration = duration;
        this.penalConsequences = penalConsequences;
        this.document_name = document_name;
        this.durationType_id = durationType_id;
        this.frequencyId = frequencyId;
        this.repeatsEvery = repeatsEvery;
        this.repeatsTypeId = repeatsTypeId;
        this.complianceId = complianceId;
        this.statutory_month = statutory_month;
        this.statutory_date = statutory_date;
        this.trigger_before_days = trigger_before_days;
        this.repeat_by = repeat_by;
        this.statuoryMapping = statuoryMapping;
        this.location = location;
    }


    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getIsStatutoryActive() {
        return isStatutoryActive;
    }

    public void setIsStatutoryActive(String isStatutoryActive) {
        this.isStatutoryActive = isStatutoryActive;
    }

    public String getComplianceTask() {
        return complianceTask;
    }

    public void setComplianceTask(String complianceTask) {
        this.complianceTask = complianceTask;
    }

    public String getStatutoryProvision() {
        return statutoryProvision;
    }

    public void setStatutoryProvision(String statutoryProvision) {
        this.statutoryProvision = statutoryProvision;
    }

    public String getFormat_fileList() {
        return format_fileList;
    }

    public void setFormat_fileList(String format_fileList) {
        this.format_fileList = format_fileList;
    }

    public String getDuration() {
        return duration;
    }

    public void setDuration(String duration) {
        this.duration = duration;
    }

    public String getDocument_name() {
        return document_name;
    }

    public void setDocument_name(String document_name) {
        this.document_name = document_name;
    }

    public String getPenalConsequences() {
        return penalConsequences;
    }

    public void setPenalConsequences(String penalConsequences) {
        this.penalConsequences = penalConsequences;
    }

    public String getDurationType_id() {
        return durationType_id;
    }

    public void setDurationType_id(String durationType_id) {
        this.durationType_id = durationType_id;
    }

    public int getFrequencyId() {
        return frequencyId;
    }

    public void setFrequencyId(int frequencyId) {
        this.frequencyId = frequencyId;
    }

    public String getRepeatsEvery() {
        return repeatsEvery;
    }

    public void setRepeatsEvery(String repeatsEvery) {
        this.repeatsEvery = repeatsEvery;
    }

    public int getComplianceId() {
        return complianceId;
    }

    public void setComplianceId(int complianceId) {
        this.complianceId = complianceId;
    }

    public String getRepeatsTypeId() {
        return repeatsTypeId;
    }

    public void setRepeatsTypeId(String repeatsTypeId) {
        this.repeatsTypeId = repeatsTypeId;
    }

    public String getStatutory_month() {
        return statutory_month;
    }

    public void setStatutory_month(String statutory_month) {
        this.statutory_month = statutory_month;
    }

    public String getStatutory_date() {
        return statutory_date;
    }

    public void setStatutory_date(String statutory_date) {
        this.statutory_date = statutory_date;
    }

    public String getRepeat_by() {
        return repeat_by;
    }

    public void setRepeat_by(String repeat_by) {
        this.repeat_by = repeat_by;
    }

    public String getTrigger_before_days() {
        return trigger_before_days;
    }

    public void setTrigger_before_days(String trigger_before_days) {
        this.trigger_before_days = trigger_before_days;
    }

    public String getStatuoryMapping() {
        return statuoryMapping;
    }

    public void setStatuoryMapping(String statuoryMapping) {
        this.statuoryMapping = statuoryMapping;
    }

    public String getLocation() {
        return location;
    }

    public void setLocation(String location) {
        this.location = location;
    }


}

Answer 1

int不能采取＆＃34;＆＃34;或空值。 ＆＃34;＆＃34;你想要一个int是一个字符串。因此，数字格式错误。而不是int使用Integer。使用该方法时，不要传递＆＃34;＆＃34;，而是传递null。

Answer 2

  

Integer.parseInt(cursor.getString(0))

这是在调用异常。所以cursor.getString(0)没有返回一个数字，可能是因为它没有存储在你的数据库中。

Answer 3

我认为，您的数据库具有KEY_ID的数字数据类型。那么你可以使用cursor.getInt（0）代替Integer.parseInt（cursor.getString（0））

替换此行。

  StatutoryModel contact = new StatutoryModel(Integer.parseInt(cursor.getString(0)), cursor.getString(1), cursor.getString(2), cursor.getString(3), cursor.getString(4), cursor.getString(5), cursor.getString(6), cursor.getString(7), cursor.getString(8), cursor.getString(9), Integer.parseInt(cursor.getString(10)), cursor.getString(11), cursor.getString(12), Integer.parseInt(cursor.getString(13)), cursor.getString(14), cursor.getString(15), cursor.getString(16), cursor.getString(17), cursor.getString(18), cursor.getString(19));

到

    StatutoryModel contact = new StatutoryModel(cursor.getInt(0), cursor.getString(1), cursor.getString(2), cursor.getString(3), cursor.getString(4), cursor.getString(5), cursor.getString(6), cursor.getString(7), cursor.getString(8), cursor.getString(9), cursor.getInt(10), cursor.getString(11), cursor.getString(12), cursor.getInt(13), cursor.getString(14), cursor.getString(15), cursor.getString(16), cursor.getString(17), cursor.getString(18), cursor.getString(19));

我希望这会对你有所帮助。感谢

Answer 4

Try this

Before you convert into integer first check it's not empty or not blank

**Integer.parseInt(cursor.getString(0))**

Above statement when the cursor.getString(0) return int then no
issue but when return any string then give the number NumberFormatException.

so give proper validation before convert,

Answer 5

String.valueOf（）不会对待＆＃34;＆＃34;作为一个数字，这是您获得此异常的主要原因。你应该传递0。

我想知道你如何调用这个方法getStatutoryRow（）。我认为方法调用容易出错。