Android 读取U盘或SD卡中的所有文件
源码下载:
https://download.csdn.net/download/qq_31939617/10491366 下载
读取U盘中的文件,需要获取U盘的路径,可看另一篇帖子:https://blog.csdn.net/qq_31939617/article/details/80447276
package com.example.sz.readfile;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.util.Log;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class MainActivity extends Activity {
private static final String TAG = "MainActivity";
private ListView lv;
ArrayList name;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv = (ListView) findViewById(R.id.lv);
name = new ArrayList();
TextView tv = findViewById(R.id.textView1);
tv.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//读取SD卡
/* if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
File path = Environment.getExternalStorageDirectory();// 获得SD卡路径
// File path = new File("/mnt/sdcard/");
File[] files = path.listFiles();// 读取
getFileName(files);
}
*/
//读取U盘
File path = new File("/mnt/usbhost1");//外置U盘路径
File[] files = path.listFiles();// 读取
getFileName(files);
SimpleAdapter adapter = new SimpleAdapter(MainActivity.this, name, R.layout.pes, new String[]{"Name"}, new int[]{R.id.txt_tv});
lv.setAdapter(adapter);
for (int i = 0; i < name.size(); i++) {
Log.e(TAG, "list. name: " + name.get(i));
}
}
});
}
private void getFileName(File[] files) {
if (files != null) {// 先判断目录是否为空,否则会报空指针
String fileName = null;
for (File file : files) {
if (file.isDirectory()) {
Log.e(TAG, "若是文件目录。继续读1" + file.getName().toString() + file.getPath().toString());
getFileName(file.listFiles());
Log.e(TAG, "若是文件目录。继续读2" + file.getName().toString() + file.getPath().toString());
} else {
fileName = file.getName();
if (fileName.endsWith(".txt")) {
HashMap map = new HashMap();
String s = fileName.substring(0, fileName.lastIndexOf(".")).toString();
Log.i(TAG, "文件名txt:: " + s);
map.put("Name", fileName.substring(0, fileName.lastIndexOf(".")));
name.add(map);
}
}
}
}
}
}
源码下载:
https://download.csdn.net/download/qq_31939617/10491366 下载