Android中调用文件管理器并返回选中文件的路径
实际项目中经常需要调用文件管理器，选择下载路径或者上传的本地文件路径。今天就给大家做个demo示范该功能的实现过程。
一、实现效果预览
以下为三星S6的样机测试效果，当然不同手机调用后的效果不一样。
二、代码实现
布局文件很简单，就一个Button和TextView，这里不示范了，直接上实现代码：
package com.panhouye.selectfile; import android.annotation.SuppressLint; import android.app.Activity; import android.content.ContentUris; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.os.Environment; import android.provider.DocumentsContract; import android.provider.MediaStore; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { TextView tv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button btn = (Button) findViewById(R.id.btn); tv = (TextView) findViewById(R.id.tv); btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(Intent.ACTION_GET_CONTENT); //intent.setType(“image/*”);//选择图片 //intent.setType(“audio/*”); //选择音频 //intent.setType(“video/*”); //选择视频 （mp4 3gp 是android支持的视频格式） //intent.setType(“video/*;image/*”);//同时选择视频和图片 intent.setType("*/*");//无类型限制 intent.addCategory(Intent.CATEGORY_OPENABLE); startActivityForResult(intent, 1); } }); } String path; @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (resultCode == Activity.RESULT_OK) { Uri uri = data.getData(); if ("file".equalsIgnoreCase(uri.getScheme())){//使用第三方应用打开 path = uri.getPath(); tv.setText(path); Toast.makeText(this,path+"11111",Toast.LENGTH_SHORT).show(); return; } if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT) {//4.4以后 path = getPath(this, uri); tv.setText(path); Toast.makeText(this,path,Toast.LENGTH_SHORT).show(); } else {//4.4以下下系统调用方法 path = getRealPathFromURI(uri); tv.setText(path); Toast.makeText(MainActivity.this, path+"222222", Toast.LENGTH_SHORT).show(); } } } public String getRealPathFromURI(Uri contentUri) { String res = null; String[] proj = { MediaStore.Images.Media.DATA }; Cursor cursor = getContentResolver().query(contentUri, proj, null, null, null); if(null!=cursor&&cursor.moveToFirst()){; int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); res = cursor.getString(column_index); cursor.close(); } return res; } /** * 专为Android4.4设计的从Uri获取文件绝对路径，以前的方法已不好使 */ @SuppressLint("NewApi") public String getPath(final Context context, final Uri uri) { final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT; // DocumentProvider if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) { // ExternalStorageProvider if (isExternalStorageDocument(uri)) { final String docId = DocumentsContract.getDocumentId(uri); final String[] split = docId.split(":"); final String type = split[0]; if ("primary".equalsIgnoreCase(type)) { return Environment.getExternalStorageDirectory() + "/" + split[1]; } } // DownloadsProvider else if (isDownloadsDocument(uri)) { final String id = DocumentsContract.getDocumentId(uri); final Uri contentUri = ContentUris.withAppendedId( Uri.parse("content://downloads/public_downloads"), Long.valueOf(id)); return getDataColumn(context, contentUri, null, null); } // MediaProvider else if (isMediaDocument(uri)) { final String docId = DocumentsContract.getDocumentId(uri); final String[] split = docId.split(":"); final String type = split[0]; Uri contentUri = null; if ("image".equals(type)) { contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI; } else if ("video".equals(type)) { contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI; } else if ("audio".equals(type)) { contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; } final String selection = "_id=?"; final String[] selectionArgs = new String[]{split[1]}; return getDataColumn(context, contentUri, selection, selectionArgs); } } // MediaStore (and general) else if ("content".equalsIgnoreCase(uri.getScheme())) { return getDataColumn(context, uri, null, null); } // File else if ("file".equalsIgnoreCase(uri.getScheme())) { return uri.getPath(); } return null; } /** * Get the value of the data column for this Uri. This is useful for * MediaStore Uris, and other file-based ContentProviders. * * @param context The context. * @param uri The Uri to query. * @param selection (Optional) Filter used in the query. * @param selectionArgs (Optional) Selection arguments used in the query. * @return The value of the _data column, which is typically a file path. */ public String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) { Cursor cursor = null; final String column = "_data"; final String[] projection = {column}; try { cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null); if (cursor != null && cursor.moveToFirst()) { final int column_index = cursor.getColumnIndexOrThrow(column); return cursor.getString(column_index); } } finally { if (cursor != null) cursor.close(); } return null; } /** * @param uri The Uri to check. * @return Whether the Uri authority is ExternalStorageProvider. */ public boolean isExternalStorageDocument(Uri uri) { return "com.android.externalstorage.documents".equals(uri.getAuthority()); } /** * @param uri The Uri to check. * @return Whether the Uri authority is DownloadsProvider. */ public boolean isDownloadsDocument(Uri uri) { return "com.android.providers.downloads.documents".equals(uri.getAuthority()); } /** * @param uri The Uri to check. * @return Whether the Uri authority is MediaProvider. */ public boolean isMediaDocument(Uri uri) { return "com.android.providers.media.documents".equals(uri.getAuthority()); } }
三、小结
这是调用系统自带的文件管理，无法保证和控制统一的界面显示，所以大家还是要实现与自己APP统一的文件管理界面，共勉。
转: https://www.cnblogs.com/panhouye/archive/2017/04/23/6751710.html
