Android加载SD卡目录，文件夹遍历，图片设置，设置文件对应打开方式等

此案例主要说的是Android使用GridView加载SD卡下所有目录，文件夹多层遍历，文件图标修改，设置文件对应打开方式等功能。

如图：

Android加载SD卡目录，文件夹遍历，图片设置，设置文件对应打开方式等_第1张图片

代码：

public class GridViewFile extends Activity implements View.OnClickListener {private Context context;private TextView tv_title, textView;private GridView listView;private final String MUSIC_PATH = "/";// 记录当前路径下 的所有文件的数组File currentParent;// 记录当前路径下的所有文件的文件数组File[] currentFiles;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);context = this;initView();}public void initView() {findViewById(R.id.public_top_img_close).setOnClickListener(this);listView = (GridView) findViewById(R.id.gridview);textView = (TextView) findViewById(R.id.llss);onLoad();}public void onLoad() {ListSongsName();}private void ListSongsName() {// 获取系统的SD卡目录File root = new File(MUSIC_PATH);// 如果SD卡存在if (root.exists()) {currentParent = root;currentFiles = root.listFiles();// 获取root目录下的所有文件// 使用当前陆慕下的全部文件，文件夹来填充ListViewinflateListView(currentFiles);}// 为ListView的列表项的单击事件绑定监视器listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view,int position, long id) {// 用户点击了文件，则调用手机已安装软件操作该文件if (currentFiles[position].isFile()) {onError(currentFiles[position].getPath() + "1");Intent intent = OpenFile.openFile(currentFiles[position].getPath());startActivity(intent);} else {// 获取currentFiles[position]路径下的所有文件File[] tmp = currentFiles[position].listFiles();if (tmp == null || tmp.length == 0) {Toast.makeText(GridViewFile.this, "空文件夹!",Toast.LENGTH_SHORT).show();}// ifelse {// 获取用户单击的列表项对应的文件夹，设为当前的父文件夹currentParent = currentFiles[position];// 保存当前文件夹内的全部问价和文件夹currentFiles = tmp;inflateListView(currentFiles);}}}});}// 更新列表private void inflateListView(File[] files) {if (files.length == 0)Toast.makeText(GridViewFile.this, "sd卡不存在", Toast.LENGTH_SHORT).show();else {// 创建一个List集合,List集合的元素是MapList> listItems = new ArrayList>();for (int i = 0; i < files.length; i++) {Map listItem = new HashMap();// 如果当前File是文件夹，使用folder图标；否则使用file图标Log.i("path", files[i].getPath());Log.i("path", files[i].getName());if (files[i].isDirectory())listItem.put("icon", R.drawable.file_wenjianjia);// else if(files[i].isFi)elselistItem.put("icon", R.drawable.file_wenjian1);listItem.put("fileName", files[i].getName());// 添加List项listItems.add(listItem);}// 创建一个SimpleAdapterSimpleAdapter simpleAdapter = new SimpleAdapter(this, listItems,R.layout.acheshi_item, new String[] { "icon", "fileName" },new int[] { R.id.imageView1, R.id.text_path });// 位ListView设置AdpterlistView.setAdapter(simpleAdapter);try {textView.setText("当前路径为：" + currentParent.getCanonicalPath());} catch (IOException e) {e.printStackTrace();}}}@Overridepublic void onClick(View v) {onbey();}// 返回上层菜单private void onbey() {try {if (!MUSIC_PATH.equals(currentParent.getCanonicalPath())) {// 获取上一层目录currentParent = currentParent.getParentFile();// 列出当前目录下的所有文件currentFiles = currentParent.listFiles();// 再次更新ListViewinflateListView(currentFiles);} else {new AlertDialog.Builder(this).setIcon(R.drawable.ic_launcher).setTitle("提示").setMessage("确定要退出吗？").setPositiveButton("确定",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog,int which) {finish();}}).setNegativeButton("取消",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog,int which) {}}).create().show();}} catch (Exception e) {e.printStackTrace();}}public void onError(Object error) {Toast.makeText(getApplicationContext(), error + "", Toast.LENGTH_LONG).show();}protected void onDestroy() {super.onDestroy();}}

/** * 根据路径调用系统对应的应用打开文件 */public class OpenFile {    public static Intent openFile(String filePath){        File file = new File(filePath);        if(!file.exists()) return null;            /* 取得扩展名 */        String end=file.getName().substring(file.getName().lastIndexOf(".") + 1,file.getName().length()).toLowerCase();            /* 依扩展名的类型决定MimeType */        if(end.equals("m4a")||end.equals("mp3")||end.equals("mid")||                end.equals("xmf")||end.equals("ogg")||end.equals("wav")){            return getAudioFileIntent(filePath);        }else if(end.equals("3gp")||end.equals("mp4")){            return getAudioFileIntent(filePath);        }else if(end.equals("jpg")||end.equals("gif")||end.equals("png")||                end.equals("jpeg")||end.equals("bmp")){            return getImageFileIntent(filePath);        }else if(end.equals("apk")){            return getApkFileIntent(filePath);        }else if(end.equals("ppt")){            return getPptFileIntent(filePath);        }else if(end.equals("xls")){            return getExcelFileIntent(filePath);        }else if(end.equals("doc")){            return getWordFileIntent(filePath);        }else if(end.equals("pdf")){            return getPdfFileIntent(filePath);        }else if(end.equals("chm")){            return getChmFileIntent(filePath);        }else if(end.equals("txt")){            return getTextFileIntent(filePath,false);        }else{            return getAllIntent(filePath);        }    }    //Android获取一个用于打开APK文件的intent    public static Intent getAllIntent( String param ) {        Intent intent = new Intent();        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        intent.setAction(android.content.Intent.ACTION_VIEW);//动作        Uri uri = Uri.fromFile(new File(param ));//转换类型        intent.setDataAndType(uri,"*/*");        return intent;    }    //Android获取一个用于打开APK文件的intent    public static Intent getApkFileIntent( String param ) {        Intent intent = new Intent();        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        intent.setAction(android.content.Intent.ACTION_VIEW);        Uri uri = Uri.fromFile(new File(param ));        intent.setDataAndType(uri,"application/vnd.android.package-archive");        return intent;    }    //Android获取一个用于打开VIDEO文件的intent    public static Intent getVideoFileIntent( String param ) {        Intent intent = new Intent("android.intent.action.VIEW");        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);        intent.putExtra("oneshot", 0);        intent.putExtra("configchange", 0);        Uri uri = Uri.fromFile(new File(param ));        intent.setDataAndType(uri, "video/*");        return intent;    }    //Android获取一个用于打开AUDIO文件的intent    public static Intent getAudioFileIntent( String param ){        Intent intent = new Intent("android.intent.action.VIEW");        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);        intent.putExtra("oneshot", 0);        intent.putExtra("configchange", 0);        Uri uri = Uri.fromFile(new File(param ));        intent.setDataAndType(uri, "audio/*");        return intent;    }    //Android获取一个用于打开Html文件的intent    public static Intent getHtmlFileIntent( String param ){        Uri uri = Uri.parse(param ).buildUpon().encodedAuthority("com.android.htmlfileprovider").scheme("content").encodedPath(param ).build();        Intent intent = new Intent("android.intent.action.VIEW");        intent.setDataAndType(uri, "text/html");        return intent;    }    //Android获取一个用于打开图片文件的intent    public static Intent getImageFileIntent( String param ) {        Intent intent = new Intent("android.intent.action.VIEW");        intent.addCategory("android.intent.category.DEFAULT");        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        Uri uri = Uri.fromFile(new File(param ));        intent.setDataAndType(uri, "image/*");        return intent;    }    //Android获取一个用于打开PPT文件的intent    public static Intent getPptFileIntent( String param ){        Intent intent = new Intent("android.intent.action.VIEW");        intent.addCategory("android.intent.category.DEFAULT");        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        Uri uri = Uri.fromFile(new File(param ));        intent.setDataAndType(uri, "application/vnd.ms-powerpoint");        return intent;    }    //Android获取一个用于打开Excel文件的intent    public static Intent getExcelFileIntent( String param ){        Intent intent = new Intent("android.intent.action.VIEW");        intent.addCategory("android.intent.category.DEFAULT");        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        Uri uri = Uri.fromFile(new File(param ));        intent.setDataAndType(uri, "application/vnd.ms-excel");        return intent;    }    //Android获取一个用于打开Word文件的intent    public static Intent getWordFileIntent( String param ){        Intent intent = new Intent("android.intent.action.VIEW");        intent.addCategory("android.intent.category.DEFAULT");        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        Uri uri = Uri.fromFile(new File(param ));        intent.setDataAndType(uri, "application/msword");        return intent;    }    //Android获取一个用于打开CHM文件的intent    public static Intent getChmFileIntent( String param ){        Intent intent = new Intent("android.intent.action.VIEW");        intent.addCategory("android.intent.category.DEFAULT");        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        Uri uri = Uri.fromFile(new File(param ));        intent.setDataAndType(uri, "application/x-chm");        return intent;    }    //Android获取一个用于打开文本文件的intent    public static Intent getTextFileIntent( String param, boolean paramBoolean){        Intent intent = new Intent("android.intent.action.VIEW");        intent.addCategory("android.intent.category.DEFAULT");        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        if (paramBoolean){            Uri uri1 = Uri.parse(param );            intent.setDataAndType(uri1, "text/plain");        }else{            Uri uri2 = Uri.fromFile(new File(param ));            intent.setDataAndType(uri2, "text/plain");        }        return intent;    }    //Android获取一个用于打开PDF文件的intent    public static Intent getPdfFileIntent( String param ){        Intent intent = new Intent("android.intent.action.VIEW");        intent.addCategory("android.intent.category.DEFAULT");        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        Uri uri = Uri.fromFile(new File(param ));        intent.setDataAndType(uri, "application/pdf");        return intent;    }}

不要忘记在AndroidManifest.xml加权限哦！

源码点击下载

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