以下是一个简单的例子,演示如何使用 FilenameFilter:
import ohos.agp.components.Component;
import ohos.agp.components.ComponentContainer;
import ohos.agp.components.Text;
import ohos.agp.utils.LayoutAlignment;
import ohos.agp.window.dialog.ToastDialog;
import ohos.app.Context;
import ohos.bundle.AbilityInfo;
import ohos.bundle.ElementName;
import ohos.bundle.HapModuleInfo;
import ohos.hiviewdfx.HiLog;
import ohos.hiviewdfx.HiLogLabel;
import ohos.hiviewdfx.HiLogType;
import ohos.hiviewdfx.HiLogGlobalInfo;
import ohos.hiviewdfx.HiView;
import ohos.media.camera.CameraKit;
import ohos.media.camera.device.Camera;
import ohos.media.image.ImageReceiver;
import ohos.media.image.ImageTransform;
import ohos.media.image.common.ImageFormat;
import ohos.media.image.common.Size;
import ohos.security.SystemPermission;
import ohos.sensor.agent.SensorAgent;
import ohos.sensor.bean.CategoryOrientation;
import ohos.sensor.bean.SensorEvent;
import ohos.sensor.listener.ICategoryOrientationDataCallback;
import ohos.sensor.listener.SensorDataChannel;
import ohos.sensor.listener.SensorDataListener;
import ohos.sensor.listener.SensorStateListener;
import ohos.sensor.manager.SensorManager;
import ohos.sensor.manager.SensorManagerErrors;
import ohos.sensor.manager.SensorManagerHelper;
import ohos.sensor.manager.SensorStd;
import ohos.sensor.util.*;
import ohos.system.Parameters;
import ohos.system.ResourceManager;
import ohos.system.dialog.StandardDialog;
import ohos.systemdialog.DialogButton;
import ohos.systemdialog.SystemDialog;
import ohos.telephony.TelephonyCallState;
import ohos.telephony.TelephonyCallStatus;
import ohos.telephony.TelephonyConstants;
import ohos.telephony.TelephonyEventHandler;
import ohos.telephony.TelephonyEventInfo;
import ohos.telephony.TelephonyManager;
import ohos.telephony.TelephonyStateListener;
import ohos.telephony.TelephonyStatus;
import ohos.ui.ContextDeal;
import ohos.ui.colorpicker.ColorChangedListener;
import ohos.ui.colorpicker.ColorPickerDialog;
import ohos.ui.colorpicker.RgbColor;
import java.io.File;
import java.io.FilenameFilter;
/**
* 文件名过滤示例
*/
public class MyFilenameFilter implements FilenameFilter {
private String extension;
/**
* 构造函数
*
* @param extension 要过滤的文件扩展名
*/
public MyFilenameFilter(String extension) {
this.extension = extension;
}
/**
* 实现 FilenameFilter 接口的 accept 方法
*
* @param dir 文件目录
* @param name 文件名
* @return 如果文件名以指定扩展名结尾,则返回 true,否则返回 false
*/
@Override
public boolean accept(File dir, String name) {
return name.endsWith("." + extension);
}
}
在上面的例子中,MyFilenameFilter 类实现了 FilenameFilter 接口,并通过构造函数传入要过滤的文件扩展名。accept 方法定义了过滤规则,如果文件名以指定的扩展名结尾,则返回 true,否则返回 false。
你可以根据需要修改 accept 方法中的过滤规则,以适应你的具体需求。
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