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"button_addData"버튼을 클릭 할 때 "sendMessage()"메소드를 실행하려고 시도하지만 시도 할 때마다 앱이 충돌합니다. 그 목적은 데이터베이스를 생성하고 입력 된 모든 데이터를 그 안에 저장하는 것입니다. 여기에 코드 조각입니다 :Android Studio - java.lang.IllegalStateException : 버튼의 onClick 메서드를 찾을 수 없습니다.
package com.example.rishi.ibplanner;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;
import java.util.Calendar;
public class EnterDataActivity extends AppCompatActivity {
DatabaseHelper myDb;
EditText editDescription, editDuration;
Spinner spnPriority;
Long deadlineDate;
Button btnAddData;
public long sendValue() {
DatePicker spnDatePicker = (DatePicker) findViewById(R.id.datepicker_deadline);
int day = spnDatePicker.getDayOfMonth();
int month = spnDatePicker.getMonth();
int year = spnDatePicker.getYear();
Calendar thatDay = Calendar.getInstance();
thatDay.set(Calendar.DAY_OF_MONTH, day);
thatDay.set(Calendar.MONTH, month); // 0-11 so 1 less
thatDay.set(Calendar.YEAR, year);
Calendar today = Calendar.getInstance();
long diff = today.getTimeInMillis() - thatDay.getTimeInMillis(); //result in millis
long days = diff/(24 * 60 * 60 * 1000); //conversion into days
return days;
}
// Button to proceed
public void sendMessage(View view) {
myDb = new DatabaseHelper(this);
editDescription = (EditText)findViewById(R.id.edit_description);
editDuration = (EditText)findViewById(R.id.edit_duration);
spnPriority = (Spinner)findViewById(R.id.priority_spinner);
deadlineDate = sendValue();
btnAddData = (Button)findViewById(R.id.button_addData);
addData();
}
public void addData() {
btnAddData.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick (View v) {
boolean isInserted = myDb.insertData(editDescription.getText().toString(),
editDuration.getText().toString(),
spnPriority.getSelectedItem().toString(),
deadlineDate.toString());
if (isInserted = true)
Toast.makeText(EnterDataActivity.this, "Data Inserted", Toast.LENGTH_LONG).show();
else
Toast.makeText(EnterDataActivity.this, "Data not Inserted", Toast.LENGTH_LONG).show();
}
}
);
}
public void cancelActivity (View view) {
onBackPressed();
}
}
하고 XML, 그냥 단추를 들면 :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.rishi.ibplanner.EnterDataActivity">
<Button
android:id="@+id/button_addData"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="12dp"
android:onClick="sendMessage"
android:text="@string/add" />
</RelativeLayout>
그리고 나는 로그 캣에서 나타나는 오류는 다음과 같습니다
java.lang.IllegalStateException: Could not find method sendMessage[EnterDataActivity](View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatButton with id 'button_addData'
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:327)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:284)
at android.view.View.performClick(View.java:5637)
at android.view.View$PerformClick.run(View.java:22429)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
에서 OnCreate 코드가 기록 된 코드를 표시 할 수 있습니다, 당신은 이미 XML하여 지정으로 그 버튼에 리스너를 추가 할 필요가 온 클릭이없는 속성을 addData에서 리스너를 제거하십시오. –