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package org.libreoffice.storage.external;
import android.annotation.TargetApi;
import android.content.ContentResolver;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.UriPermission;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import org.libreoffice.storage.DocumentProviderFactory;
import java.util.Set;
/**
* Activity to select which directory browser to use.
* Android 5+ will use the DocumentTree intent to locate a browser.
* Android 4+ & OTG will use the internal directory browser.
*/
public class BrowserSelectorActivity extends AppCompatActivity {
public static final String PREFERENCE_KEY_EXTRA = "org.libreoffice.pref_key_extra";
public static final String MODE_EXTRA = "org.libreoffice.mode_extra";
public static final String MODE_OTG = "OTG";
public static final String MODE_EXT_SD = "EXT_SD";
private static final String LOGTAG = BrowserSelectorActivity.class.getSimpleName();
private static final int REQUEST_DOCUMENT_TREE = 1;
private static final int REQUEST_INTERNAL_BROWSER = 2;
private Set<SharedPreferences.OnSharedPreferenceChangeListener> listeners;
private String preferenceKey;
private SharedPreferences preferences;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
preferenceKey = getIntent().getStringExtra(PREFERENCE_KEY_EXTRA);
preferences = PreferenceManager.getDefaultSharedPreferences(this);
String mode = getIntent().getStringExtra(MODE_EXTRA);
if(mode.equals(MODE_EXT_SD)) {
findSDCard();
} else if (mode.equals(MODE_OTG)) {
findOTGDevice();
}
}
private void findOTGDevice() {
useInternalBrowser(DocumentProviderFactory.OTG_PROVIDER_INDEX);
}
private void findSDCard() {
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
useDocumentTreeBrowser();
} else {
useInternalBrowser(DocumentProviderFactory.EXTSD_PROVIDER_INDEX);
}
}
private void useInternalBrowser(int providerIndex) {
IExternalDocumentProvider provider =
(IExternalDocumentProvider) DocumentProviderFactory.getInstance()
.getProvider(providerIndex);
String previousDirectoryPath = preferences.getString(preferenceKey, provider.guessRootURI(this));
Intent i = new Intent(this, DirectoryBrowserActivity.class);
i.putExtra(DirectoryBrowserActivity.DIRECTORY_PATH_EXTRA, previousDirectoryPath);
startActivityForResult(i, REQUEST_INTERNAL_BROWSER);
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void useDocumentTreeBrowser() {
Intent i = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
startActivityForResult(i, REQUEST_DOCUMENT_TREE);
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
//listeners are registered here as onActivityResult is called before onResume
super.onActivityResult(requestCode, resultCode, data);
registerListeners();
if(resultCode == RESULT_OK) {
switch(requestCode) {
case REQUEST_DOCUMENT_TREE:
Uri treeUri = data.getData();
preferences.edit()
.putString(preferenceKey, treeUri.toString())
.apply();
updatePersistedUriPermission(treeUri);
getContentResolver().takePersistableUriPermission(treeUri,
Intent.FLAG_GRANT_READ_URI_PERMISSION |
Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
break;
case REQUEST_INTERNAL_BROWSER:
Uri fileUri = data.getData();
preferences.edit()
.putString(preferenceKey, fileUri.toString())
.apply();
break;
default:
}
}
unregisterListeners();
Log.d(LOGTAG, "Preference saved: " +
preferences.getString(preferenceKey, "Directory not saved."));
finish();
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void updatePersistedUriPermission(Uri treeUri) {
freePreviousUriPermissions();
//TODO: Use non-emulator Android 5+ device to check if needed
/*this.grantUriPermission(this.getPackageName(),
treeUri,
Intent.FLAG_GRANT_READ_URI_PERMISSION |
Intent.FLAG_GRANT_WRITE_URI_PERMISSION); */
getContentResolver().takePersistableUriPermission(treeUri,
Intent.FLAG_GRANT_READ_URI_PERMISSION |
Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
private void freePreviousUriPermissions() {
ContentResolver cr = getContentResolver();
for (UriPermission uriPermission : cr.getPersistedUriPermissions()) {
cr.releasePersistableUriPermission(uriPermission.getUri(), 0);
}
}
private void registerListeners() {
listeners = DocumentProviderFactory.getInstance().getChangeListeners();
for (SharedPreferences.OnSharedPreferenceChangeListener listener : listeners) {
PreferenceManager.getDefaultSharedPreferences(this)
.registerOnSharedPreferenceChangeListener(listener);
}
}
private void unregisterListeners() {
for (SharedPreferences.OnSharedPreferenceChangeListener listener : listeners) {
PreferenceManager.getDefaultSharedPreferences(this)
.unregisterOnSharedPreferenceChangeListener(listener);
}
}
}
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