Java DocumentsContract.getTreeDocumentId方法代码示例

import android.provider.DocumentsContract; //导入方法依赖的package包/类
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public static boolean checkPersistUriPermissionsAndUpdate(Context context, DocumentFolder documentFolder)
{
    Uri uri = documentFolder.getFolder().getUri();
    List<UriPermission> permissions = context.getContentResolver().getPersistedUriPermissions();
    for (UriPermission permission : permissions)
    {
        String permissionTreeId = DocumentsContract.getTreeDocumentId(permission.getUri());
        String uriTreeId = DocumentsContract.getTreeDocumentId(uri);
        if (uriTreeId.startsWith(permissionTreeId))
        {
            // update permissions - after a restart this is necessary...
            updatePersistUriPermissions(context, uri);
            documentFolder.updateDocument(DocumentFile.fromTreeUri(context, permission.getUri()));
            return true;
        }
    }
    return false;
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
@TargetApi(Build.VERSION_CODES.KITKAT)
@Override
protected void onActivityResult(final int requestCode, int resultCode, final Intent data)
{
	super.onActivityResult(requestCode, resultCode, data);
	switch (requestCode)
	{
		// Grab the selected permission so we can generate valid test files paths
		case REQUEST_CODE_WRITE_PERMISSION:
			if (resultCode == RESULT_OK && data != null)
			{
				Snackbar.make(findViewById(android.R.id.content), data.getDataString(), Snackbar.LENGTH_SHORT).show();
				String root = DocumentsContract.getTreeDocumentId(data.getData());
				test1Uri = DocumentsContract.buildDocumentUriUsingTree(data.getData(), root + documentId1);
				test2Uri = DocumentsContract.buildDocumentUriUsingTree(data.getData(), root + documentId2);
			}
			break;
	}
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
public String getDocumentId()
{

    try
    {
        if (DocumentsContract.isDocumentUri(mContext, mUri))
        {
            return DocumentsContract.getDocumentId(mUri);
        } else
        {
            return DocumentsContract.getTreeDocumentId(mUri);
        }
    }
    catch (IllegalArgumentException e)
    {
        // This is not a document uri, for now I'll try to handle this gracefully.
        // While it may be convenient for a user to be able to use this object for all uri,
        // it may be difficult to manage all aspects gracefully.
        return null;
    }
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
public static Uri prepareTreeUri(Uri treeUri) {
    String documentId;
    try {
        documentId = DocumentsContract.getDocumentId(treeUri);
        if (documentId == null) {
            throw new IllegalArgumentException();
        }
    } catch (Exception e) {
        // IllegalArgumentException will be raised
        // if DocumentsContract.getDocumentId() failed.
        // But it isn't mentioned the document,
        // catch all kinds of Exception for safety.
        documentId = DocumentsContract.getTreeDocumentId(treeUri);
    }
    return DocumentsContract.buildDocumentUriUsingTree(treeUri, documentId);
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
private boolean isTreeUri(Uri possibleTreeUri) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        return DocumentsContract.isTreeUri(possibleTreeUri);
    } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        // Prior to N we can't directly check if the URI is a tree URI, so we have to just try it
        try {
            String treeDocumentId = DocumentsContract.getTreeDocumentId(possibleTreeUri);
            return !TextUtils.isEmpty(treeDocumentId);
        } catch (IllegalArgumentException e) {
            // Definitely not a tree URI
            return false;
        }
    }
    // No tree URIs prior to Lollipop
    return false;
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private String getAbsolutePathFromFolderPickerResultUri(Uri resultUri) {
    if ("com.android.externalstorage.documents".equals(resultUri.getAuthority())) {
        final String documentId = DocumentsContract.getTreeDocumentId(resultUri);
        final String[] idParts = documentId.split(":"); // e.g. "primary:Podcasts"
        // Default: internal storage
        String rootPath = Environment.getExternalStorageDirectory().getAbsolutePath();

        // If not on internal storage -> SD card
        if (!"primary".equals(idParts[0]))
            // Make sure there is only one storage besides the internal one (i.e. the SD card),
            // other setups are just too complicated and rare for us to care about
            if (getExternalMediaDirs().length == 2)
                // Set root path to absolute path for SD card
                rootPath = getExternalMediaDirs()[1].getAbsolutePath().split("/Android")[0];
            else throw new IllegalArgumentException("Unknown storage setup");

        return rootPath + File.separator + idParts[1];
    } else
        throw new IllegalArgumentException("Not a real local folder");
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private static String getVolumeIdFromTreeUri(final Uri treeUri) {
    final String docId = DocumentsContract.getTreeDocumentId(treeUri);
    final String[] split = docId.split(":");

    if (split.length > 0) {
        return split[0];
    }
    else {
        return null;
    }
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private static String getDocumentPathFromTreeUri(final Uri treeUri) {
    final String docId = DocumentsContract.getTreeDocumentId(treeUri);
    final String[] split = docId.split(":");
    if ((split.length >= 2) && (split[1] != null)) {
        return split[1];
    }
    else {
        return File.separator;
    }
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
/**
 * Returns the permissible root uri if one exists, null if not.
 *
 * @return The tree URI.
 */
public Uri getPermissibleRoot(Uri uri)
{
	if (uri == null)
		return null;

	// Files can't be correlated to UriPermissions so rely on canWrite?
	if (FileUtil.isFileScheme(uri))
	{
		File f = new File(uri.getPath());

		while (f != null && !f.canWrite())
		{
			if (f.canWrite())
				return Uri.fromFile(f);
			f = f.getParentFile();
		}
		return null;
	}
	else
	{
		for (UriPermission permission : mRootPermissions)
		{
			String permissionTreeId = DocumentsContract.getTreeDocumentId(permission.getUri());
			String uriTreeId = DocumentsContract.getTreeDocumentId(uri);

			if (uriTreeId.startsWith(permissionTreeId))
			{
				return permission.getUri();
			}
		}
	}

	return null;
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private static String getVolumeIdFromTreeUri(final Uri treeUri) {
    final String docId = DocumentsContract.getTreeDocumentId(treeUri);
    final String[] split = docId.split(":");

    if (split.length > 0) {
        return split[0];
    } else {
        return null;
    }
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private static String getDocumentPathFromTreeUri(final Uri treeUri) {
    final String docId = DocumentsContract.getTreeDocumentId(treeUri);
    final String[] split = docId.split(":");
    if ((split.length >= 2) && (split[1] != null)) {
        return split[1];
    } else {
        return File.separator;
    }
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
private static String getVolumeIdFromTreeUri(final Uri treeUri) {
    final String docId = DocumentsContract.getTreeDocumentId(treeUri);
    final String[] split = docId.split(":");

    if (split.length > 0) {
        return split[0];
    }
    else {
        return null;
    }
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
@RequiresApi(Build.VERSION_CODES.LOLLIPOP)
private static String getDocumentPathFromTreeUri(final Uri treeUri) {
    final String docId = DocumentsContract.getTreeDocumentId(treeUri);
    final String[] split = docId.split(":");
    if ((split.length >= 2) && (split[1] != null)) {
        return split[1];
    } else {
        return File.separator;
    }
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
/**
 * Get the volume ID from the tree URI.
 *
 * @param treeUri The tree URI.
 * @return The volume ID.
 */
@RequiresApi(Build.VERSION_CODES.LOLLIPOP)
private static String getVolumeIdFromTreeUri(final Uri treeUri) {
	final String docId = DocumentsContract.getTreeDocumentId(treeUri);
	final String[] split = docId.split(":");

	if (split.length > 0) {
		return split[0];
	}
	else {
		return null;
	}
}
 

import android.provider.DocumentsContract; //导入方法依赖的package包/类
/**
 * Get the document path (relative to volume name) for a tree URI (LOLLIPOP).
 *
 * @param treeUri The tree URI.
 * @return the document path.
 */
@RequiresApi(Build.VERSION_CODES.LOLLIPOP)
private static String getDocumentPathFromTreeUri(final Uri treeUri) {
	final String docId = DocumentsContract.getTreeDocumentId(treeUri);
	final String[] split = docId.split(":");
	if ((split.length >= 2) && (split[1] != null)) {
		return split[1];
	}
	else {
		return File.separator;
	}
}