android简易文件管理器实例(列表式文件目录)

package com.example.d_readandwritetextfile;

import java.io.File;
import java.util.ArrayList;

import com.example.d_readandwritetextfile.entity.FileEntity;
import com.example.d_readandwritetextfile.entity.FileEntity.Type;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

/**
 * 文件列表 界面
 * @author Administrator
 *
 */
public class FileListActivity extends Activity implements OnClickListener{
	
	private ListView mListView;
	private Button btnComfirm;
	private MyFileAdapter mAdapter;
	private Context mContext;
	private File currentFile;
	String sdRootPath;
	
	private ArrayList mList;
	
	private Handler mHandler;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_filelist);
		mHandler = new Handler(){
			@Override
			public void handleMessage(Message msg) {
				super.handleMessage(msg);
				switch (msg.what) {
				case 1:
					if(mAdapter ==null){
						mAdapter = new MyFileAdapter(mContext, mList);
						mListView.setAdapter(mAdapter);
					}else{
						mAdapter.notifyDataSetChanged();
					}
					
					break;
				case 2:
					
					break;

				default:
					break;
				}
			}
		};
		
		mCOntext= this;
		mList = new ArrayList<>();
		sdRootPath =Environment.getExternalStorageDirectory().getAbsolutePath();
		currentFile = new File(sdRootPath);
		System.out.println(sdRootPath);
		initView();
		getData(sdRootPath);
		
		
	}
	
	@Override
	public void onBackPressed() {
//		super.onBackPressed();
		System.out.println("onBackPressed...");
		if(sdRootPath.equals(currentFile.getAbsolutePath())){
			System.out.println("已经到了根目录...");
			return ;
		}
		
		String parentPath = currentFile.getParent();
		currentFile = new File(parentPath);
		getData(parentPath);
	}
	
	private void initView() {
		mListView = (ListView) findViewById(R.id.listView1);
		btnComfirm = (Button) findViewById(R.id.button1);
		
		mListView.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<&＃63;> parent, View view,
					int position, long id) {
				final FileEntity entity = mList.get(position);
				if(entity.getFileType() == Type.FLODER){
					currentFile = new File(entity.getFilePath());
					getData(entity.getFilePath());
				}else if(entity.getFileType() == Type.FILE){
					
					runOnUiThread(new Runnable() {
						
						@Override
						public void run() {
							Toast.makeText(mContext, entity.getFilePath()+" "+entity.getFileName(),
									1).show();
						}
					});
				}
				
			}
		});
	}
	
	private void getData(final String path) {
		new Thread(){
			@Override
			public void run() {
				super.run();
				
				findAllFiles(path);
			}
		}.start();

	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.button1:
			setResult(100);
			finish();
			break;

		default:
			break;
		}
		
	}
	
	/**
	 * 查找path地址下所有文件
	 * @param path
	 */
	public void findAllFiles(String path) {
		mList.clear();
		
		if(path ==null ||path.equals("")){
			return;
		}
		File fatherFile = new File(path);
		File[] files = fatherFile.listFiles();
		if (files != null && files.length > 0) {
			for (int i = 0; i  mAList;
		private LayoutInflater mInflater;
		
		

		public MyFileAdapter(Context mContext, ArrayList mList) {
			super();
			this.mCOntext= mContext;
			this.mAList = mList;
			mInflater = LayoutInflater.from(mContext);
		}

		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return mAList.size();
		}

		@Override
		public Object getItem(int position) {
			// TODO Auto-generated method stub
			return mAList.get(position);
		}

		@Override
		public long getItemId(int position) {
			return position;
		}

		@Override
		public int getItemViewType(int position) {
			if(mAList.get(position).getFileType() == Type.FLODER){
				return 0;
			}else{
				return 1;
			}
		}
		
		@Override
		public int getViewTypeCount() {
			return 2;
		}
		
		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
//			System.out.println("position-->"+position+"  ---convertView--"+convertView);
			ViewHolder holder = null;
			int type = getItemViewType(position);
			FileEntity entity = mAList.get(position);
			
			if(cOnvertView== null){
				holder = new ViewHolder();
				switch (type) {
				case 0://folder
					cOnvertView= mInflater.inflate(R.layout.item_listview, parent, false);
					holder.iv = (ImageView) convertView.findViewById(R.id.item_imageview);
					holder.tv = (TextView) convertView.findViewById(R.id.item_textview);
					break;
				case 1://file
					cOnvertView= mInflater.inflate(R.layout.item_listview, parent, false);
					holder.iv = (ImageView) convertView.findViewById(R.id.item_imageview);
					holder.tv = (TextView) convertView.findViewById(R.id.item_textview);
					
					break;

				default:
					break;
					
				}
				convertView.setTag(holder);
			}else {
				holder = (ViewHolder) convertView.getTag();
			}
			
			switch (type) {
			case 0:
				holder.iv.setImageResource(R.drawable.folder_125);
				holder.tv.setText(entity.getFileName());
				break;
			case 1:
				holder.iv.setImageResource(R.drawable.file);
				holder.tv.setText(entity.getFileName());
				
				break;

			default:
				break;
			}
			
			
			return convertView;
		}
		
	}
	
	class ViewHolder {
		ImageView iv;
		TextView tv;
	}

}

package com.example.d_readandwritetextfile.entity;

public class FileEntity {
	
	public enum Type{
		FLODER,FILE
	}
	private String filePath;
	private String fileName;
	private String fileSize;
	private Type fileType;
	
	
	public String getFilePath() {
		return filePath;
	}
	public void setFilePath(String filePath) {
		this.filePath = filePath;
	}
	public String getFileName() {
		return fileName;
	}
	public void setFileName(String fileName) {
		this.fileName = fileName;
	}
	public String getFileSize() {
		return fileSize;
	}
	public void setFileSize(String fileSize) {
		this.fileSize = fileSize;
	}
	public Type getFileType() {
		return fileType;
	}
	public void setFileType(Type fileType) {
		this.fileType = fileType;
	}
	
	

}

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