Breadcrumbs in the action bar for navigating up one level and showing current title.
Change-Id: I595e06549b888bd67c6dddd599a4cc77416c3a41
diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
index 2ce0bcc..50aa1df 100644
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -18,6 +18,7 @@
import android.app.Activity;
import android.app.Fragment;
+import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.preference.Preference;
@@ -25,8 +26,13 @@
import android.preference.PreferenceGroup;
import android.preference.PreferenceScreen;
import android.text.TextUtils;
+import android.util.AttributeSet;
import android.util.Log;
+import android.view.LayoutInflater;
import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.LinearLayout;
+import android.widget.TextView;
import java.util.ArrayList;
@@ -37,6 +43,8 @@
implements PreferenceFragment.OnPreferenceStartFragmentCallback,
SettingsPreferenceFragment.OnStateListener {
+ private static final boolean DBG = false;
+
private static final String TAG = "Settings";
private static final String KEY_PARENT = "parent";
@@ -52,22 +60,13 @@
public static final String EXTRA_SHOW_FRAGMENT_ARGUMENTS = ":settings:show_fragment_args";
- // Temporary, until all top-level settings are converted to fragments
private static final String BACK_STACK_PREFS = ":settings:prefs";
private View mPrefsPane;
private View mMainPane;
private boolean mSinglePane;
- private ArrayList<CharSequence> mTrail = new ArrayList<CharSequence>();
-
- /*
- @Override
- protected void onResume() {
- super.onResume();
- findPreference(KEY_CALL_SETTINGS).setEnabled(!AirplaneModeEnabler.isAirplaneModeOn(this));
- }
- */
+ private BreadCrumbs mBreadCrumbs;
@Override
protected void onCreate(Bundle savedInstanceState) {
@@ -82,6 +81,8 @@
String initialFragment = intent.getStringExtra(EXTRA_SHOW_FRAGMENT);
Bundle initialArguments = intent.getBundleExtra(EXTRA_SHOW_FRAGMENT_ARGUMENTS);
+ createActionBar();
+
if (mSinglePane) {
if (initialFragment != null) {
showFragment(initialFragment, initialArguments);
@@ -111,11 +112,21 @@
}
}
+ private void createActionBar() {
+ LayoutInflater inflater = (LayoutInflater)
+ getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+ View customNavBar = inflater.inflate(R.layout.settings_actionbar, null, false);
+ getActionBar().setCustomNavigationMode(customNavBar);
+ mBreadCrumbs = (BreadCrumbs) customNavBar.findViewById(R.id.bread_crumbs);
+ mBreadCrumbs.setActivity(this);
+ }
+
boolean showFragment(Preference preference) {
if (mSinglePane) {
startWithFragment(preference.getFragment(), preference.getExtras());
return false;
} else {
+ mBreadCrumbs.clear();
return showFragment(preference.getFragment(), preference.getExtras());
}
}
@@ -129,10 +140,13 @@
}
private boolean showFragment(String fragmentClass, Bundle extras) {
- Fragment f = Fragment.instantiate(this, fragmentClass, extras);
+ if (DBG) Log.d(TAG, "showFragment");
+ Fragment f = Fragment.instantiate(this, fragmentClass, extras);
if (f instanceof SettingsPreferenceFragment) {
((SettingsPreferenceFragment) f).setOnStateListener(this);
}
+ mBreadCrumbs.clear();
+ getFragmentManager().popBackStack(BACK_STACK_PREFS, POP_BACK_STACK_INCLUSIVE);
getFragmentManager().openTransaction().replace(R.id.prefs, f).commit();
return true;
}
@@ -140,41 +154,28 @@
private void addToBreadCrumbs(Fragment fragment) {
final CharSequence title = ((PreferenceFragment) fragment)
.getPreferenceScreen().getTitle();
- if (mSinglePane) mTrail.clear();
- if (mTrail.size() == 0 || !TextUtils.equals(title, mTrail.get(mTrail.size() - 1))) {
- mTrail.add(title);
- updateTitle();
+ if (mSinglePane) {
+ mBreadCrumbs.clear();
}
+ mBreadCrumbs.push(title);
}
private void removeFromBreadCrumbs(Fragment fragment) {
- if (mTrail.size() > 0) {
- mTrail.remove(mTrail.size() - 1);
- }
- updateTitle();
- }
-
- private void updateTitle() {
- String trail = "";
- for (CharSequence trailPart : mTrail) {
- if (trail.length() != 0)
- trail += " | ";
- trail = trail + trailPart;
- }
- setTitle(trail);
+ mBreadCrumbs.pop(((PreferenceFragment) fragment).getPreferenceScreen().getTitle());
+ mBreadCrumbs.update();
}
public void onCreated(SettingsPreferenceFragment fragment) {
- Log.d(TAG, "Fragment created " + fragment + " (name: " + fragment.getClass() + ")");
+ if (DBG) Log.d(TAG, "Fragment created " + fragment);
addToBreadCrumbs(fragment);
}
public void onDestroyed(SettingsPreferenceFragment fragment) {
- removeFromBreadCrumbs(fragment);
Log.d(TAG, "Fragment destroyed " + fragment + " (name: " + fragment.getClass() + ")");
}
public boolean onPreferenceStartFragment(PreferenceFragment caller, Preference pref) {
+ if (DBG) Log.d(TAG, "onPreferenceStartFragment");
Fragment f = Fragment.instantiate(this, pref.getFragment(), pref.getExtras());
if (f instanceof SettingsPreferenceFragment) {
((SettingsPreferenceFragment) f).setOnStateListener(this);
@@ -184,6 +185,13 @@
return true;
}
+ @Override
+ public void onBackPressed() {
+ mBreadCrumbs.pop();
+ mBreadCrumbs.update();
+ super.onBackPressed();
+ }
+
public static class TopLevelSettings extends PreferenceFragment {
private IconPreferenceScreen mHighlightedPreference;
@@ -198,6 +206,21 @@
updatePreferenceList();
}
+ @Override
+ public void onResume() {
+ super.onResume();
+
+ updateCallSettings();
+ }
+
+ private void updateCallSettings() {
+ Preference callSettings = findPreference(KEY_CALL_SETTINGS);
+ // Might have been removed in non-voice-capable devices
+ if (callSettings != null) {
+ callSettings.setEnabled(!AirplaneModeEnabler.isAirplaneModeOn(getActivity()));
+ }
+ }
+
private void updatePreferenceList() {
final Activity activity = getActivity();
PreferenceGroup parent = (PreferenceGroup) findPreference(KEY_PARENT);
@@ -247,4 +270,91 @@
onPreferenceTreeClick(getPreferenceScreen(), first);
}
}
+
+ public static class BreadCrumbs extends LinearLayout implements OnClickListener {
+
+ private ArrayList<CharSequence> mTitles = new ArrayList<CharSequence>();
+ private TextView mLevelUpTitle;
+ private TextView mCurrentLevelTitle;
+ private View mDivider;
+ private Activity mActivity;
+
+ public BreadCrumbs(Context context) {
+ this(context, null);
+ }
+
+ public BreadCrumbs(Context context, AttributeSet attrs) {
+ super(context, attrs);
+ }
+
+ public void push(CharSequence title) {
+ if (mTitles.size() == 0
+ || !TextUtils.equals(title, mTitles.get(mTitles.size() - 1))) {
+ mTitles.add(title);
+ update();
+ }
+ }
+
+ public void pop() {
+ if (mTitles.size() > 0) {
+ mTitles.remove(mTitles.size() - 1);
+ }
+ }
+
+ public void pop(CharSequence title) {
+ if (mTitles.size() > 1) {
+ mTitles.remove(title);
+ }
+ }
+
+ public void clear() {
+ mTitles.clear();
+ }
+
+ private void initNavViews() {
+ if (mLevelUpTitle == null) {
+ mLevelUpTitle = (TextView) findViewById(R.id.level_up_title);
+ mCurrentLevelTitle = (TextView) findViewById(R.id.level_current_title);
+ mDivider = findViewById(R.id.level_divider);
+ if (mLevelUpTitle != null) {
+ mLevelUpTitle.setOnClickListener(this);
+ }
+ if (mCurrentLevelTitle != null) {
+ mCurrentLevelTitle.setOnClickListener(this);
+ }
+ }
+ }
+
+ public void update() {
+ initNavViews();
+ if (mLevelUpTitle == null) return;
+
+ final int titleCount = mTitles.size();
+ if (titleCount > 1) {
+ mLevelUpTitle.setText(mTitles.get(titleCount - 2));
+ mLevelUpTitle.setVisibility(VISIBLE);
+ mDivider.setVisibility(VISIBLE);
+ } else {
+ mLevelUpTitle.setVisibility(GONE);
+ mDivider.setVisibility(GONE);
+ }
+ if (titleCount > 0) {
+ mCurrentLevelTitle.setText(mTitles.get(titleCount - 1));
+ } else {
+ mCurrentLevelTitle.setText("");
+ }
+ }
+
+ public void setActivity(Activity activity) {
+ mActivity = activity;
+ }
+
+ public void onClick(View v) {
+ if (mActivity == null)
+ return;
+ if (v == mLevelUpTitle) {
+ mActivity.onBackPressed();
+ }
+ }
+ }
}