小程序源码 学习相关 TXT 文本阅读器源码.rar

package com.xiexh.hcreader; import java.io.File; import java.util.ArrayList; import java.util.List; import android.app.AlertDialog; import android.app.Dialog; import android.app.ListActivity; import android.content.Intent; import android.os.Bundle; import android.os.Environment; import android.util.Log; import android.view.View; import android.widget.ArrayAdapter; import android.widget.ListView; public class TxtList extends ListActivity { private final int DIALOG_INFO = 0; private final int DIALOG_ERR = 1; private final String TAG = "[HcReader]"; private List<File> txtList = new ArrayList<File>(); ; /** * 入口 */ public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Log.d(TAG,"TxtListOnCreate"); File sdCardPath = Environment.getExternalStorageDirectory(); GetFiles( sdCardPath ); } /** * 获取文件列表 * @param filePath */ public void GetFiles( File filePath ){ int i; // File[] files = filePath.listFiles(); for(i=0;i<files.length;i++){ if(files[i].isDirectory()){ GetFiles( files[i] ); } else if(files[i].getName().toLowerCase().endsWith(".txt")){ txtList.add(files[i]); } } ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,FileToStr(txtList)); setListAdapter(adapter); } /** * 把文件列表转换成字符串 * @param f * @return */ public String[] FileToStr( List<File> f ){ ArrayList<String> listStr = new ArrayList<String>(); int i; for (i = 0; i < f.size(); i++) { String nameString = f.get(i).getName(); listStr.add(nameString); } return listStr.toArray(new String[0]); } /** * 当List中有点击时被激活 */ protected void onListItemClick(ListView l, View v, int position, long id) { Log.d(TAG, "listOnClick:"+txtList.get(position).toString() ); File file = txtList.get(position); Intent i = new Intent(TxtList.this,TxtView.class); i.putExtra("file", file.toString()); startActivity(i); /*if(file.isDirectory()){ GetFiles(file); }else if( file.getName().toLowerCase().endsWith(".txt") ){ Intent i = new Intent(TxtList.this,TxtView.class); i.putExtra("file", file.toString()); startActivity(i); }else{ showDialog(DIALOG_ERR); }*/ } /** * 创建对话框 * @param id * @return */ protected Dialog onCreateDialog( int id ){ switch(id){ case DIALOG_INFO: return new AlertDialog.Builder(this) .setIcon(android.R.drawable.ic_dialog_info) .setTitle("Hello xxh") .setMessage("版本：HC阅读器1.0 \n支持格式：txt") .setPositiveButton("OK", null) .create(); case DIALOG_ERR: return new AlertDialog.Builder(this) .setIcon(android.R.drawable.ic_dialog_info) .setTitle("Hello xxh") .setMessage("暂时只支持TXT格式") .setPositiveButton("OK", null) .create(); default: return null; } } }