从今天开始做笔记
调用系统管理器时 使用QQ浏览器的文件管理时，找不到“_data”引起的崩溃。
java.lang.IllegalArgumentException: column '_data' does not exist. Available columns: []
- 配好file_provider（略）
2.权限处理（略）
3.使用
调用
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("*/*");//设置类型
intent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(intent,0);
onActivityResult回调
if (resultCode == Activity.RESULT_OK) {
Uri uri = data.getData();
if ("file".equalsIgnoreCase(uri.getScheme())) {//使用第三方应用打开
filePath = uri.getPath();
return;
}
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT) {//4.4以后
filePath = FileUtil.getPath(this, uri);
} else {//4.4以下下系统调用方法
filePath = FileUtil.getRealPathFromURI(this, uri);
}
}
4.QQ浏览器文件管理 选择文件崩溃 问题的解决方法（FileUtil工具类中已包含）
if (isQQMediaDocument(uri)) {
String path = uri.getPath();
File fileDir = Environment.getExternalStorageDirectory();
File file = new File(fileDir, path.substring("/QQBrowser".length(), path.length()));
return file.exists() ? file.toString() : null;
}
/**
* 使用第三方qq文件管理器打开
*
* @param uri
*
* @return
*/
public static boolean isQQMediaDocument(Uri uri) {
return "com.tencent.mtt.fileprovider".equals(uri.getAuthority());
}
5.FileUtil工具类
/**
* Created by DB_BOY on 2019/6/24.
*/
public class FileUtil {
public static String readFileSize(String path) {
return readableFileSize(new File(path).length());
}
public static String readableFileSize(long size) {
if (size <= 0)
return "0";
final String[] units = new String[]{"B", "KB", "MB", "GB", "TB"};
int digitGroups = (int) (Math.log10(size) / Math.log10(1024));
return new DecimalFormat("#,##0.#").format(size / Math.pow(1024, digitGroups)) + " " + units[digitGroups];
}
/**
* file --> uri
* @param context
* @param file
*
* @return
*/
public static Uri getUriFromFile(Context context, File file) {
if (context == null || file == null) {
throw new NullPointerException();
}
Uri uri;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
uri = FileProvider.getUriForFile(context.getApplicationContext(), BuildConfig.APPLICATION_ID + ".fileprovider", file);
} else {
uri = Uri.fromFile(file);
}
return uri;
}
/**
* 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
*/
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
public static 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
//一些三方的文件浏览器会进入到这个方法中，例如ES
//QQ文件管理器不在此列
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);
}
} else if ("content".equalsIgnoreCase(uri.getScheme())) {// MediaStore (and general)
// Return the remote address
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();
if (isQQMediaDocument(uri)) {
String path = uri.getPath();
File fileDir = Environment.getExternalStorageDirectory();
File file = new File(fileDir, path.substring("/QQBrowser".length(), path.length()));
return file.exists() ? file.toString() : null;
}
return getDataColumn(context, uri, null, null);
} else if ("file".equalsIgnoreCase(uri.getScheme())) {// File
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 static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
Cursor cursor = null;
final String column = MediaStore.MediaColumns.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;
}
public static String getRealPathFromURI(Context context, Uri contentUri) {
return getDataColumn(context, contentUri, null, null);
}
/**
* @param uri
* The Uri to check.
*
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static 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 static 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 static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
/**
* 使用第三方qq文件管理器打开
*
* @param uri
*
* @return
*/
public static boolean isQQMediaDocument(Uri uri) {
return "com.tencent.mtt.fileprovider".equals(uri.getAuthority());
}
/**
* @param uri
* The Uri to check.
*
* @return Whether the Uri authority is Google Photos.
*/
public static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}
}
工具类作者、文章原贴：DB_BOY - Android文件管理器选择文件，获得文件路径URI转File