android遍历SD卡所有文件源程序两例-注释.docx

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1、程序一：遍历SD卡中所有文件并在listview中显示packagemy.sd;importjava.io.File;importjava.util.ArrayList;importjava.util.HashMap;importjava.util.Iterator;importjava.util.Map;importandroid.app.Activity;importandroid.os.Bundle;importandroid.widget.Button;importandroid.widget.ListView;importandroid.widget.Simp

2、leAdapter;importandroid.widget.TextView;publicclasstestSDextendsActivity{//viewTextViewtView;ListViewi;Buttonbtn;//dataprivateArrayListlist;/**Calledwhentheactivityisfirstcreated.*/@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentVi

3、ew(R.layout.main);tView=(TextView)findViewById(R.id.textview1);//btn=(Button)findViewById(R.id.go);tView=newTextView(this);tView.setText("getallfilesinyoursdcard");//initdatai=(ListView)findViewById(R.id.music_list);list=newArrayList();getAllFiles(newFile("/sdcard"));SimpleAdapterl

4、adapter=newSimpleAdapter(this,getMapData(list),R.layout.relative,newString[]{"ItemText","ItemTitle"},newint[]{R.id.ItemTitle,R.id.ItemText});i.setAdapter(ladapter);TextViewempty=newTextView(this);empty.setText("empty!");i.setEmptyView(empty);}privateArrayList>getMapDat

5、a(ArrayListlist){ArrayList>data=newArrayList>();HashMapitem;inti=0;for(i=0;i();Stringpath=list.get(i).toString();Stringname=path.substring(path.lastIndexOf("/")+1,path.length());//保

6、存每一格list单元格的数据，item.put("ItemText",name);item.put("ItemTitle",path);data.add(item);}returndata;}privatevoidgetAllFiles(Fileroot){Filefiles[]=root.listFiles();if(files!=null)for(Filef:files){if(f.isDirectory()){getAllFiles(f);}else{this.list.add(f);}}}}程序二：更简单的SD卡文件遍历程序packagecom.wenhao.t

7、est.sddemo;importjava.io.File;importandroid.app.Activity;importandroid.os.Bundle;importandroid.os.Environment;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.widget.Button;importandroid.widget.Toast;publicclassMainDemoextendsActivity{/**Calle