Android中调用系统的文件浏览器及自制简单的文件浏览器
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2024-02-28 22:15:10
调用系统自带的文件浏览器
这很简单:
/** 调用文件选择软件来选择文件 **/
private void showfilechooser() {...
调用系统自带的文件浏览器
这很简单:
/** 调用文件选择软件来选择文件 **/ private void showfilechooser() { intent = new intent(intent.action_get_content); intent.settype("*/*"); intent.addcategory(intent.category_openable); try { startactivityforresult(intent.createchooser(intent, "请选择一个要上传的文件"), file_select_code); } catch (android.content.activitynotfoundexception ex) { // potentially direct the user to the market with a dialog toast.maketext(getactivity(), "请安装文件管理器", toast.length_short) .show(); } }
在catch,我们可以做更多的操作,比如会跳转到一个下载文件管理器的页面或者等等。
对于返回的数据怎么处理呢。我项目中的上传是如下接收:
/** 根据返回选择的文件,来进行上传操作 **/ @override public void onactivityresult(int requestcode, int resultcode, intent data) { // todo auto-generated method stub if (resultcode == activity.result_ok) { // get the uri of the selected file uri uri = data.getdata(); string url; try { url = ffileutils.getpath(getactivity(), uri); log.i("ht", "url" + url); string filename = url.substring(url.lastindexof("/") + 1); intent = new intent(getactivity(), uploadservices.class); intent.putextra("filename", filename); intent.putextra("url", url); intent.putextra("type ", ""); intent.putextra("fuid", ""); intent.putextra("type", ""); getactivity().startservice(intent); } catch (urisyntaxexception e) { // todo auto-generated catch block e.printstacktrace(); } } super.onactivityresult(requestcode, resultcode, data); }
自制文件浏览器:
这里只加一些简单的图形:
来看代码:
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:layout_gravity="center_horizontal" tools:context=".mainactivity" > <textview android:id="@+id/txt1" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <imagebutton android:id="@+id/imagebt1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/home"/> <listview android:id="@+id/listfile" android:layout_width="wrap_content" android:layout_height="wrap_content" > </listview> </linearlayout>
<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" > <imageview android:id="@+id/images" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <textview android:id="@+id/txtview" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </linearlayout>
package com.android.xiong.sdfilelook; import java.io.file; import java.util.arraylist; import java.util.hashmap; import java.util.list; import java.util.map; import android.app.activity; import android.os.bundle; import android.os.environment; import android.view.menu; import android.view.view; import android.view.view.onclicklistener; import android.widget.adapterview; import android.widget.adapterview.onitemclicklistener; import android.widget.imagebutton; import android.widget.imageview; import android.widget.listview; import android.widget.simpleadapter; import android.widget.textview; public class mainactivity extends activity { private listview listfile; //当前文件目录 private string currentpath; private textview txt1; private imageview images; private textview textview; private imagebutton imagebt1; private int[] img = { r.drawable.file, r.drawable.folder, r.drawable.home }; private file[] files; private simpleadapter simple; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); listfile = (listview) findviewbyid(r.id.listfile); txt1 = (textview) findviewbyid(r.id.txt1); imagebt1 = (imagebutton) findviewbyid(r.id.imagebt1); init(environment.getexternalstoragedirectory()); listfile.setonitemclicklistener(new onitemclicklistener() { @override public void onitemclick(adapterview<?> arg0, view arg1, int arg2, long arg3) { // todo auto-generated method stub // 获取单击的文件或文件夹的名称 string folder = ((textview) arg1.findviewbyid(r.id.txtview)) .gettext().tostring(); try { file filef = new file(currentpath + '/' + folder); init(filef); } catch (exception e) { e.printstacktrace(); } } }); //回根目录 imagebt1.setonclicklistener(new onclicklistener() { @override public void onclick(view v) { init(environment.getexternalstoragedirectory()); } }); } // 界面初始化 public void init(file f) { if (environment.getexternalstoragestate().equals( environment.media_mounted)) { // 获取sdcard目录下所有文件名 files = f.listfiles(); if (!files.equals(null)) { currentpath=f.getpath(); txt1.settext("当前目录为:"+f.getpath()); list<map<string, object>> list = new arraylist<map<string, object>>(); for (int i = 0; i < files.length; i++) { map<string, object> maps = new hashmap<string, object>(); if (files[i].isfile()) maps.put("image", img[0]); else maps.put("image", img[1]); maps.put("filenames", files[i].getname()); list.add(maps); } simple = new simpleadapter(this, list, r.layout.fileimageandtext, new string[] { "image", "filenames" }, new int[] { r.id.images, r.id.txtview }); listfile.setadapter(simple); } } else { system.out.println("该文件为空"); } } @override public boolean oncreateoptionsmenu(menu menu) { // inflate the menu; this adds items to the action bar if it is present. getmenuinflater().inflate(r.menu.main, menu); return true; } }