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Breadcrumbs in the action bar for navigating up one level and showing current title.

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Change-Id: I595e06549b888bd67c6dddd599a4cc77416c3a41
This commit is contained in:
Amith Yamasani
2010-09-12 08:17:50 -07:00
parent 60133dd036
commit b61cf51d85
6 changed files with 211 additions and 33 deletions
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172
src/com/android/settings/Settings.java
View File

@@ -18,6 +18,7 @@ package com.android.settings;
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.PreferenceFragment;
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 @@ public class Settings extends Activity
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 class Settings extends Activity
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 @@ public class Settings extends Activity
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 @@ public class Settings extends Activity
}
}
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 @@ public class Settings extends Activity
}
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 @@ public class Settings extends Activity
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 @@ public class Settings extends Activity
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 @@ public class Settings extends Activity
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 @@ public class Settings extends Activity
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();
}
}
}
}

6
src/com/android/settings/SettingsPreferenceFragment.java
View File

@@ -51,6 +51,8 @@ public class SettingsPreferenceFragment extends PreferenceFragment {
private Button mNextButton;
private boolean mReportedCreation;
interface OnStateListener {
void onCreated(SettingsPreferenceFragment fragment);
@@ -65,8 +67,10 @@ public class SettingsPreferenceFragment extends PreferenceFragment {
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (mOnStateListener != null) {
if (mOnStateListener != null && !mReportedCreation) {
mOnStateListener.onCreated(this);
// So that we don't report it on the way back to this fragment
mReportedCreation = true;
}
setupButtonBar();