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Merge "Fix Fragment BackStack and Titles"

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This commit is contained in:
Fabrice Di Meglio
2014-03-03 18:01:18 +00:00
committed by Android (Google) Code Review
parent 2ce3443984 8eb3f0fbf2
commit 947d8143b9
1 changed files with 57 additions and 107 deletions
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162
src/com/android/settings/SettingsActivity.java
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@@ -62,10 +62,8 @@ import android.support.v4.widget.DrawerLayout;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.util.Log;
import android.util.Pair;
import android.util.TypedValue;
import android.util.Xml;
import android.view.ContextThemeWrapper;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
@@ -200,6 +198,8 @@ public class SettingsActivity extends Activity
private Header mSelectedHeader;
private Header mCurrentHeader;
private CharSequence mInitialTitle;
// Show only these settings for restricted users
private int[] SETTINGS_FOR_RESTRICTED = {
R.id.wireless_section,
@@ -314,39 +314,6 @@ public class SettingsActivity extends Activity
private final ArrayList<Header> mHeaders = new ArrayList<Header>();
private HeaderAdapter mHeaderAdapter;
static private class TitlePair extends Pair<Integer, CharSequence> implements Parcelable {
public TitlePair(Integer first, CharSequence second) {
super(first, second);
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(first);
TextUtils.writeToParcel(second, dest, flags);
}
TitlePair(Parcel in) {
super(in.readInt(), TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(in));
}
public static final Creator<TitlePair> CREATOR = new Creator<TitlePair>() {
public TitlePair createFromParcel(Parcel source) {
return new TitlePair(source);
}
public TitlePair[] newArray(int size) {
return new TitlePair[size];
}
};
}
private final ArrayList<TitlePair> mTitleStack = new ArrayList<TitlePair>();
private DrawerLayout mDrawerLayout;
private ListView mDrawer;
private ActionBarDrawerToggle mDrawerToggle;
@@ -409,7 +376,7 @@ public class SettingsActivity extends Activity
if (isFinishing() || mSelectedHeader == null) {
return;
}
switchToHeader(mSelectedHeader, false);
switchToHeader(mSelectedHeader, false, false);
mSelectedHeader = null;
}
@@ -557,17 +524,8 @@ public class SettingsActivity extends Activity
if (savedInstanceState != null) {
// We are restarting from a previous saved state; used that to
// initialize, instead of starting fresh.
ArrayList<TitlePair> titles =
savedInstanceState.getParcelableArrayList(SAVE_KEY_TITLES_TAG);
if (titles != null) {
mTitleStack.addAll(titles);
}
final int lastTitle = mTitleStack.size() - 1;
if (lastTitle >= 0) {
final TitlePair last = mTitleStack.get(lastTitle);
setTitleFromPair(last);
}
mInitialTitle = getTitle();
setTitleFromBackStack();
ArrayList<Header> headers =
savedInstanceState.getParcelableArrayList(SAVE_KEY_HEADERS_TAG);
@@ -579,18 +537,15 @@ public class SettingsActivity extends Activity
setSelectedHeader(mHeaders.get(curHeader));
}
}
} else {
if (initialFragment != null) {
// If we are just showing a fragment, we want to run in
// new fragment mode, but don't need to compute and show
// the headers.
switchToHeader(initialFragment, initialArguments, true);
final int initialTitleResId = getIntent().getIntExtra(EXTRA_SHOW_FRAGMENT_TITLE, 0);
mInitialTitle = (initialTitleResId > 0) ? getText(initialTitleResId) : getTitle();
final int initialTitle = getIntent().getIntExtra(EXTRA_SHOW_FRAGMENT_TITLE, 0);
if (initialTitle != 0) {
setTitle(getText(initialTitle));
}
switchToHeader(initialFragment, initialArguments, true, mInitialTitle);
} else {
// We need to try to build the headers.
onBuildHeaders(mHeaders);
@@ -600,7 +555,8 @@ public class SettingsActivity extends Activity
// the currently selected preference fragment.
if (mHeaders.size() > 0) {
Header h = onGetInitialHeader();
switchToHeader(h, false);
mInitialTitle = getHeaderTitle(h);
switchToHeader(h, false, true);
}
}
}
@@ -667,33 +623,31 @@ public class SettingsActivity extends Activity
@Override
public void onBackStackChanged() {
final int count = getFragmentManager().getBackStackEntryCount() + 1;
TitlePair pair = null;
int last;
while (mTitleStack.size() > count) {
last = mTitleStack.size() - 1;
pair = mTitleStack.remove(last);
}
// Check if we go back
if (pair != null) {
int size = mTitleStack.size();
if (size > 0) {
last = mTitleStack.size() - 1;
pair = mTitleStack.get(last);
setTitleFromPair(pair);
}
}
setTitleFromBackStack();
}
private void setTitleFromPair(TitlePair pair) {
final CharSequence title;
if (pair.first > 0) {
title = getText(pair.first);
} else {
title = pair.second;
private void setTitleFromBackStack() {
final int count = getFragmentManager().getBackStackEntryCount();
if (count == 0) {
setTitle(mInitialTitle);
return;
}
FragmentManager.BackStackEntry bse = getFragmentManager().getBackStackEntryAt(count - 1);
setTitleFromBackStackEntry(bse);
}
private void setTitleFromBackStackEntry(FragmentManager.BackStackEntry bse) {
final CharSequence title;
final int titleRes = bse.getBreadCrumbTitleRes();
if (titleRes > 0) {
title = getText(titleRes);
} else {
title = bse.getBreadCrumbTitle();
}
if (title != null) {
setTitle(title);
}
}
/**
* Returns the Header list
@@ -715,10 +669,6 @@ public class SettingsActivity extends Activity
}
}
}
if (mTitleStack.size() > 0) {
outState.putParcelableList(SAVE_KEY_TITLES_TAG, mTitleStack);
}
}
@Override
@@ -783,9 +733,10 @@ public class SettingsActivity extends Activity
* preference fragment.
*
* @param header The new header to display.
* @param validate true means that the fragment's Header needs to be validated
* @param validate true means that the fragment's Header needs to be validated.
* @param initial true means that it is the initial Header.
*/
private void switchToHeader(Header header, boolean validate) {
private void switchToHeader(Header header, boolean validate, boolean initial) {
if (header == null) {
return;
}
@@ -799,15 +750,11 @@ public class SettingsActivity extends Activity
FragmentManager.POP_BACK_STACK_INCLUSIVE);
} else {
if (header.fragment != null) {
mTitleStack.clear();
switchToHeaderInner(header.fragment, header.fragmentArguments, validate);
switchToHeaderInner(header.fragment, header.fragmentArguments, validate, !initial,
getHeaderTitle(header));
setSelectedHeader(header);
final TitlePair pair = new TitlePair(0, getHeaderTitle(header));
mTitleStack.add(pair);
setTitle(pair.second);
} else if (header.intent != null) {
setSelectedHeader(header);
mTitleStack.clear();
startActivity(header.intent);
} else {
throw new IllegalStateException(
@@ -861,19 +808,20 @@ public class SettingsActivity extends Activity
}
/**
* When in two-pane mode, switch the fragment pane to show the given
* preference fragment.
* Switch the fragment pane to show the given preference fragment.
*
* @param fragmentName The name of the fragment to display.
* @param args Optional arguments to supply to the fragment.
* @param validate true means that the fragment's Header needs to be validated
*/
private void switchToHeader(String fragmentName, Bundle args, boolean validate) {
private void switchToHeader(String fragmentName, Bundle args, boolean validate,
CharSequence title) {
setSelectedHeader(null);
switchToHeaderInner(fragmentName, args, validate);
switchToHeaderInner(fragmentName, args, validate, false, title);
}
private void switchToHeaderInner(String fragmentName, Bundle args, boolean validate) {
private void switchToHeaderInner(String fragmentName, Bundle args, boolean validate,
boolean addToBackStack, CharSequence title) {
getFragmentManager().popBackStack(BACK_STACK_PREFS,
FragmentManager.POP_BACK_STACK_INCLUSIVE);
if (validate && !isValidFragment(fragmentName)) {
@@ -882,8 +830,14 @@ public class SettingsActivity extends Activity
}
Fragment f = Fragment.instantiate(this, fragmentName, args);
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
transaction.replace(R.id.prefs, f);
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
if (addToBackStack) {
transaction.addToBackStack(BACK_STACK_PREFS);
}
if (title != null) {
transaction.setBreadCrumbTitle(title);
}
transaction.commitAllowingStateLoss();
}
@@ -1037,6 +991,13 @@ public class SettingsActivity extends Activity
*/
private void startWithFragment(String fragmentName, Bundle args, Fragment resultTo,
int resultRequestCode, int titleRes, CharSequence titleText) {
final CharSequence cs;
if (titleRes != 0) {
cs = getText(titleRes);
} else {
cs = titleText;
}
Fragment f = Fragment.instantiate(this, fragmentName, args);
if (resultTo != null) {
f.setTargetFragment(resultTo, resultRequestCode);
@@ -1045,19 +1006,8 @@ public class SettingsActivity extends Activity
transaction.replace(R.id.prefs, f);
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
transaction.addToBackStack(BACK_STACK_PREFS);
transaction.setBreadCrumbTitle(cs);
transaction.commitAllowingStateLoss();
final TitlePair pair;
final CharSequence cs;
if (titleRes != 0) {
pair = new TitlePair(titleRes, null);
cs = getText(titleRes);
} else {
pair = new TitlePair(0, titleText);
cs = titleText;
}
setTitle(cs);
mTitleStack.add(pair);
}
/**