[英]How to get file path from the content uri for zip file?
我正在觸發選擇 zip 文件的意圖,並且在 onActivityResult 中,它為我提供了一個內容 URI。 例如:: (content://com.android.providers.downloads.documents/document/197)。 選擇的文件來自下載文件夾。 誰能解釋一下,如何查詢內容解析器以獲取文件路徑? 謝謝。
Already tried code :-
Cursor cursor = getActivity().getContentResolver()
.query(contentUri, null, null, null, null);
try {
if (cursor != null && cursor.moveToFirst()) {
String path=cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
Log.i(TAG, "path Name: " + path);
}
// NOTE :: Here I am getting the file name, But i want the file path.
} finally {
cursor.close();
}
我嘗試了很多方法來從下載文件夾中的選定文件中檢索文件路徑。 由於從 android Q 開始,谷歌建議 SAF(存儲訪問框架)從用戶那里獲取數據。 我們不能使用 Environment.getExternalStoragePublicDirectory() 從 android Q 及以上獲取文件路徑。
對於 android Q 及以上您可以按照此步驟操作。
1)從您要觸發的活動或片段開始意圖。
例如:
public void performFileSearch() { //from developer docs
// ACTION_OPEN_DOCUMENT is the intent to choose a file via the system's file
// browser.
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
// Filter to only show results that can be "opened", such as a
// file (as opposed to a list of contacts or timezones)
intent.addCategory(Intent.CATEGORY_OPENABLE);
// Filter to show only images, using the image MIME data type.
// If one wanted to search for ogg vorbis files, the type would be "audio/ogg".
// To search for all documents available via installed storage providers,
// it would be "*/*".
intent.setType("application/pdf"); // MIME type for what file you required
startActivityForResult(intent, READ_REQUEST_CODE);
}
2)然后結果將出現在您的活動或片段的onActivityResult中
@Override
public void onActivityResult(int requestCode, int resultCode,
Intent resultData) { // from developer docs
// The ACTION_OPEN_DOCUMENT intent was sent with the request code
// READ_REQUEST_CODE. If the request code seen here doesn't match, it's the
// response to some other intent, and the code below shouldn't run at all.
if (requestCode == READ_REQUEST_CODE && resultCode == Activity.RESULT_OK) {
// The document selected by the user won't be returned in the intent.
// Instead, a URI to that document will be contained in the return intent
// provided to this method as a parameter.
// Pull that URI using resultData.getData().
Uri uri = null;
if (resultData != null) {
uri = resultData.getData();
Log.i(TAG, "Uri: " + uri.toString());
processWithUriToGetPath(uri);
}
}
}
從 uri 中提取數據(注意:對於圖像、視頻和音頻,您可以參考開發者文檔。由於沒有找到任何合適的文件文檔,因此給出了此示例)。
private void processWithUriToGetPath(Uri contentUri) {
//Use content Resolver to get the input stream that it holds the data and copy that in a temp file of your app file directory for your references
File selectedFile = new File(getActivity().getFilesDir(), "your file name"); //your app file dir or cache dir you can use
InputStream in = getActivity().getContentResolver().openInputStream(contentUri);
OutputStream out = new FileOutputStream(selectedFile);
try {
byte[] buf = new byte[1024];
int len;
if (in != null) {
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
out.close();
in.close();
} catch (IOException ie) {
ie.printStackTrace();
}
//after this you will get file from the selected file and you can do
whatever with your wish.
// Hope it helps...
}
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