我正在尝试在android中创建一个excel文件。但是，当我单击按钮创建文件时，我的应用程序崩溃了。
logcat的
02-12 17:43:48.287: E/dalvikvm(25342): Could not find class 'jxl.WorkbookSettings', referenced from method lmf.test7.MainActivity.onClick
02-12 17:43:51.257: E/AndroidRuntime(25342): FATAL EXCEPTION: main
02-12 17:43:51.257: E/AndroidRuntime(25342): java.lang.NoClassDefFoundError: jxl.WorkbookSettings
02-12 17:43:51.257: E/AndroidRuntime(25342): at lmf.test7.MainActivity.onClick(MainActivity.java:44)
02-12 17:43:51.257: E/AndroidRuntime(25342): at android.view.View.performClick(View.java:4212)
02-12 17:43:51.257: E/AndroidRuntime(25342): at android.view.View$PerformClick.run(View.java:17476)
02-12 17:43:51.257: E/AndroidRuntime(25342): at android.os.Handler.handleCallback(Handler.java:800)
02-12 17:43:51.257: E/AndroidRuntime(25342): at android.os.Handler.dispatchMessage(Handler.java:100)
02-12 17:43:51.257: E/AndroidRuntime(25342): at android.os.Looper.loop(Looper.java:194)
02-12 17:43:51.257: E/AndroidRuntime(25342): at android.app.ActivityThread.main(ActivityThread.java:5371)
02-12 17:43:51.257: E/AndroidRuntime(25342): at java.lang.reflect.Method.invokeNative(Native Method)
02-12 17:43:51.257: E/AndroidRuntime(25342): at java.lang.reflect.Method.invoke(Method.java:525)
02-12 17:43:51.257: E/AndroidRuntime(25342): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
02-12 17:43:51.257: E/AndroidRuntime(25342): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
02-12 17:43:51.257: E/AndroidRuntime(25342): at dalvik.system.NativeStart.main(Native Method)
MainActivity
public class MainActivity extends Activity implements OnClickListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(this);
}
@Override
public void onClick(View arg0) {
String Fnamexls="testfile" + ".xls";
File sdCard = Environment.getExternalStorageDirectory();
File directory = new File (sdCard.getAbsolutePath() + "/newfolder");
directory.mkdirs();
File file = new File(directory, Fnamexls);
WorkbookSettings wbSettings = new WorkbookSettings();
wbSettings.setLocale(new Locale("en", "EN"));
WritableWorkbook workbook;
try {
int a = 1;
workbook = Workbook.createWorkbook(file, wbSettings);
WritableSheet sheet = workbook.createSheet("First Sheet", 0);
Label label = new Label(0, 2, "SECOND");
Label label1 = new Label(0,1,"first");
Label label0 = new Label(0,0,"HEADING");
Label label3 = new Label(1,0,"Heading2");
Label label4 = new Label(1,1,String.valueOf(a));
try {
sheet.addCell(label);
sheet.addCell(label1);
sheet.addCell(label0);
sheet.addCell(label4);
sheet.addCell(label3);
} catch (RowsExceededException e) {
e.printStackTrace();
} catch (WriteException e) {
e.printStackTrace();
}
workbook.write();
try {
workbook.close();
} catch (WriteException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
顺便说一下，我使用的是Java Excel API。
答案 0 :(得分：3)
似乎找不到jxl.WorkbookSettings。将 Java Excel API.jar 添加到项目 libs 中，然后清理并构建项目。
按照以下步骤将添加外部库或 JARS 添加到项目中：
右击项目 - > goto属性 - ＆gt;点击位于左侧的“Java Build Path” - ＆gt; goto库 - ＆gt;你看 单击添加外部JARS按钮并添加。
答案 1 :(得分：1)
在Android Studio中，您可以执行以下操作： -
现在清理并运行项目。
答案 2 :(得分：1)
***use this code with jar file poi-3.7.jar***
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
Button Excel;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Excel = (Button)findViewById(R.id.Excel);
Excel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
saveExcelFile("MyExcel.xls");
}
});
}
private static boolean saveExcelFile(String fileName) {
String path;
File dir;
if (!isExternalStorageAvailable() || isExternalStorageReadOnly()) {
Log.e("Failed", "Storage not available or read only");
return false;
}
boolean success = false;
//New Workbook
Workbook wb = new HSSFWorkbook();
Cell c = null;
//Cell style for header row
CellStyle cs = wb.createCellStyle();
cs.setFillForegroundColor(HSSFColor.LIME.index);
cs.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
cs.setAlignment(HSSFCellStyle.ALIGN_CENTER);
CellStyle cellStyle = wb.createCellStyle();
cellStyle.setAlignment(HSSFCellStyle.ALIGN_LEFT);
//New Sheet
Sheet sheet1 = null;
sheet1 = wb.createSheet("myOrder");
// Generate column headings
Row row = null;
row = sheet1.createRow(0);
c = row.createCell(0);
c.setCellValue("Item Number");
c.setCellStyle(cs);
c = row.createCell(1);
c.setCellValue("Quantity");
c.setCellStyle(cs);
c = row.createCell(2);
c.setCellValue("Price");
c.setCellStyle(cs);
sheet1.setColumnWidth(0, (15 * 500));
sheet1.setColumnWidth(1, (15 * 500));
sheet1.setColumnWidth(2, (15 * 500));
int val = 0;
int k = 1;
for(int i=1;i<12;i++){
row = sheet1.createRow(k);
for(int j=0;j<3;j++){
c = row.createCell(j);
c.setCellValue(val);
c.setCellStyle(cellStyle);
val++;
}
sheet1.setColumnWidth(i, (15 * 500));
k++;
}
path = Environment.getExternalStorageDirectory().getAbsolutePath()+"/EXCEL/";
dir = new File(path);
if (!dir.exists()) {
dir.mkdirs();
}
File file = new File(dir, fileName);
FileOutputStream os = null;
try {
os = new FileOutputStream(file);
wb.write(os);
Log.w("FileUtils", "Writing file" + file);
success = true;
} catch (IOException e) {
Log.w("FileUtils", "Error writing " + file, e);
} catch (Exception e) {
Log.w("FileUtils", "Failed to save file", e);
} finally {
try {
if (null != os)
os.close();
} catch (Exception ex) {
}
}
return success;
}
public static boolean isExternalStorageReadOnly() {
String extStorageState = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(extStorageState)) {
return true;
}
return false;
}
public static boolean isExternalStorageAvailable() {
String extStorageState = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(extStorageState)) {
return true;
}
return false;
}
}