Android Apache POI库来读取和显示Excel表格
时间: 2024-05-30 10:12:33 浏览: 208
很高兴回答您的问题。Android Apache POI库是一款用于读取和显示Excel表格的开源库。POI的全称是Poor Obfuscation Implementation,它提供了一组API,可以操作Microsoft Office格式的文档,例如Word、Excel和PowerPoint等。如果您需要在Android应用程序中读取和显示Excel表格,POI库就是一个不错的选择。
相关问题
Android读取poi的execl显示为表格
要在Android中读取Excel文件并将其显示为表格,可以使用以下步骤:
1. 导入Apache POI库:在项目的build.gradle文件中添加以下依赖项:
```
implementation 'org.apache.poi:poi:4.1.2'
implementation 'org.apache.poi:poi-ooxml:4.1.2'
```
2. 在布局文件中添加RecyclerView视图:
```xml
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
```
3. 创建一个ExcelUtils类来读取Excel文件并将其转换为列表:
```java
public class ExcelUtils {
public static List<List<String>> readExcel(Context context, Uri uri) throws IOException, InvalidFormatException {
InputStream inputStream = context.getContentResolver().openInputStream(uri);
Workbook workbook = WorkbookFactory.create(inputStream);
Sheet sheet = workbook.getSheetAt(0);
List<List<String>> data = new ArrayList<>();
for (Row row : sheet) {
List<String> rowData = new ArrayList<>();
for (Cell cell : row) {
rowData.add(cell.getStringCellValue());
}
data.add(rowData);
}
return data;
}
}
```
4. 创建一个RecyclerView适配器来显示Excel数据:
```java
public class ExcelAdapter extends RecyclerView.Adapter<ExcelAdapter.ViewHolder> {
private List<List<String>> mData;
public ExcelAdapter(List<List<String>> data) {
mData = data;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_excel, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
List<String> rowData = mData.get(position);
holder.mTextView1.setText(rowData.get(0));
holder.mTextView2.setText(rowData.get(1));
holder.mTextView3.setText(rowData.get(2));
}
@Override
public int getItemCount() {
return mData.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView mTextView1, mTextView2, mTextView3;
public ViewHolder(View itemView) {
super(itemView);
mTextView1 = itemView.findViewById(R.id.textView1);
mTextView2 = itemView.findViewById(R.id.textView2);
mTextView3 = itemView.findViewById(R.id.textView3);
}
}
}
```
5. 在Activity中使用ExcelUtils类来读取Excel文件并将数据传递给RecyclerView适配器:
```java
public class MainActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mRecyclerView = findViewById(R.id.recyclerView);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
try {
List<List<String>> data = ExcelUtils.readExcel(this, uri);
ExcelAdapter adapter = new ExcelAdapter(data);
mRecyclerView.setAdapter(adapter);
} catch (IOException e) {
e.printStackTrace();
} catch (InvalidFormatException e) {
e.printStackTrace();
}
}
}
```
这样就可以在Android应用程序中读取Excel文件并将其显示为表格了。
android读取xlsx文件封装,android读取assets中Excel表格并显示
要读取XLSX文件,可以使用Apache POI库。以下是一个简单的封装类,可以读取Assets文件夹中的XLSX文件并将其显示在Android应用程序中:
```java
import android.content.Context;
import android.content.res.AssetManager;
import android.util.Log;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
public class ExcelReader {
private static final String TAG = ExcelReader.class.getSimpleName();
public static ArrayList<ArrayList<String>> readExcel(Context context, String fileName) {
ArrayList<ArrayList<String>> dataList = new ArrayList<>();
AssetManager assetManager = context.getAssets();
try {
InputStream inputStream = assetManager.open(fileName);
XSSFWorkbook workbook = new XSSFWorkbook(inputStream);
Sheet sheet = workbook.getSheetAt(0);
Iterator<Row> rowIterator = sheet.iterator();
while (rowIterator.hasNext()) {
Row row = rowIterator.next();
Iterator<Cell> cellIterator = row.cellIterator();
ArrayList<String> rowData = new ArrayList<>();
while (cellIterator.hasNext()) {
Cell cell = cellIterator.next();
String cellValue = "";
switch (cell.getCellType()) {
case STRING:
cellValue = cell.getStringCellValue();
break;
case NUMERIC:
cellValue = String.valueOf(cell.getNumericCellValue());
break;
case BOOLEAN:
cellValue = String.valueOf(cell.getBooleanCellValue());
break;
default:
break;
}
rowData.add(cellValue);
}
dataList.add(rowData);
}
} catch (IOException e) {
Log.e(TAG, "readExcel: ", e);
}
return dataList;
}
}
```
然后,在您的Activity或Fragment中,您可以像这样使用它:
```java
ArrayList<ArrayList<String>> dataList = ExcelReader.readExcel(getContext(), "example.xlsx");
for (ArrayList<String> row : dataList) {
for (String cell : row) {
Log.d(TAG, cell);
}
}
```
请注意,在这个例子中,我们假设您的XLSX文件只有一个工作表,并且该工作表是第一个工作表。如果您的文件包含多个工作表,您需要根据需要更改代码。
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