Handle fragment breadcrumbs for deep-linked settings launches.
This adds meta-data to the manifest for specifying the parent fragment and enabling a link
in the breadcrumbs to navigate "up" a level even if the parent is not in the back-stack.
Bug: 3236568
Fix a monkey issue in VpnSettings.
diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
index 00706ad..b91c7ee 100644
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -16,12 +16,17 @@
package com.android.settings;
+import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Bundle;
import android.preference.PreferenceActivity;
+import android.preference.PreferenceActivity.Header;
+import android.util.Log;
+import android.view.View;
+import android.view.View.OnClickListener;
import java.util.HashMap;
import java.util.List;
@@ -35,10 +40,20 @@
"com.android.settings.TOP_LEVEL_HEADER_ID";
private static final String META_DATA_KEY_FRAGMENT_CLASS =
"com.android.settings.FRAGMENT_CLASS";
+ private static final String META_DATA_KEY_PARENT_TITLE =
+ "com.android.settings.PARENT_FRAGMENT_TITLE";
+ private static final String META_DATA_KEY_PARENT_FRAGMENT_CLASS =
+ "com.android.settings.PARENT_FRAGMENT_CLASS";
+
+ private static final String SAVE_KEY_CURRENT_HEADER = "com.android.settings.CURRENT_HEADER";
+ private static final String SAVE_KEY_PARENT_HEADER = "com.android.settings.PARENT_HEADER";
private String mFragmentClass;
private int mTopLevelHeaderId;
private Header mFirstHeader;
+ private Header mCurrentHeader;
+ private Header mParentHeader;
+ private boolean mInLocalHeaderSwitch;
// TODO: Update Call Settings based on airplane mode state.
@@ -47,7 +62,9 @@
@Override
protected void onCreate(Bundle savedInstanceState) {
getMetaData();
+ mInLocalHeaderSwitch = true;
super.onCreate(savedInstanceState);
+ mInLocalHeaderSwitch = false;
if (!onIsHidingHeaders() && onIsMultiPane()) {
highlightHeader();
@@ -55,6 +72,84 @@
// a specific settings screen.
setTitle(R.string.settings_label);
}
+
+ // Retrieve any saved state
+ if (savedInstanceState != null) {
+ mCurrentHeader = savedInstanceState.getParcelable(SAVE_KEY_CURRENT_HEADER);
+ mParentHeader = savedInstanceState.getParcelable(SAVE_KEY_PARENT_HEADER);
+ }
+
+ // If the current header was saved, switch to it
+ if (savedInstanceState != null && mCurrentHeader != null) {
+ //switchToHeaderLocal(mCurrentHeader);
+ showBreadCrumbs(mCurrentHeader.title, null);
+ }
+
+ if (mParentHeader != null) {
+ setParentTitle(mParentHeader.title, null, new OnClickListener() {
+ public void onClick(View v) {
+ switchToParent(mParentHeader.fragment);
+ }
+ });
+ }
+ }
+
+ @Override
+ protected void onSaveInstanceState(Bundle outState) {
+ super.onSaveInstanceState(outState);
+
+ // Save the current fragment, if it is the same as originally launched
+ if (mCurrentHeader != null) {
+ outState.putParcelable(SAVE_KEY_CURRENT_HEADER, mCurrentHeader);
+ }
+ if (mParentHeader != null) {
+ outState.putParcelable(SAVE_KEY_PARENT_HEADER, mParentHeader);
+ }
+ }
+
+ private void switchToHeaderLocal(Header header) {
+ mInLocalHeaderSwitch = true;
+ switchToHeader(header);
+ mInLocalHeaderSwitch = false;
+ }
+
+ @Override
+ public void switchToHeader(Header header) {
+ if (!mInLocalHeaderSwitch) {
+ mCurrentHeader = null;
+ mParentHeader = null;
+ }
+ super.switchToHeader(header);
+ }
+
+ /**
+ * Switch to parent fragment and store the grand parent's info
+ * @param class name of the activity wrapper for the parent fragment.
+ */
+ private void switchToParent(String className) {
+ final ComponentName cn = new ComponentName(this, className);
+ try {
+ final PackageManager pm = getPackageManager();
+ final ActivityInfo parentInfo = pm.getActivityInfo(cn, PackageManager.GET_META_DATA);
+
+ if (parentInfo != null && parentInfo.metaData != null) {
+ String fragmentClass = parentInfo.metaData.getString(META_DATA_KEY_FRAGMENT_CLASS);
+ CharSequence fragmentTitle = parentInfo.loadLabel(pm);
+ Header parentHeader = new Header();
+ parentHeader.fragment = fragmentClass;
+ parentHeader.title = fragmentTitle;
+ mCurrentHeader = parentHeader;
+
+ switchToHeaderLocal(parentHeader);
+
+ mParentHeader = new Header();
+ mParentHeader.fragment
+ = parentInfo.metaData.getString(META_DATA_KEY_PARENT_FRAGMENT_CLASS);
+ mParentHeader.title = parentInfo.metaData.getString(META_DATA_KEY_PARENT_TITLE);
+ }
+ } catch (NameNotFoundException nnfe) {
+ Log.w("Settings", "Could not find parent activity : " + className);
+ }
}
@Override
@@ -64,7 +159,7 @@
// If it is not launched from history, then reset to top-level
if ((intent.getFlags() & Intent.FLAG_ACTIVITY_LAUNCHED_FROM_HISTORY) == 0
&& mFirstHeader != null) {
- switchToHeader(mFirstHeader);
+ switchToHeaderLocal(mFirstHeader);
}
}
@@ -126,7 +221,9 @@
if (fragmentClass != null) {
Header header = new Header();
header.fragment = fragmentClass;
+ header.title = getTitle();
header.fragmentArguments = getIntent().getExtras();
+ mCurrentHeader = header;
return header;
}
return super.onGetInitialHeader();
@@ -178,6 +275,17 @@
if (ai == null || ai.metaData == null) return;
mTopLevelHeaderId = ai.metaData.getInt(META_DATA_KEY_HEADER_ID);
mFragmentClass = ai.metaData.getString(META_DATA_KEY_FRAGMENT_CLASS);
+
+ // Check if it has a parent specified and create a Header object
+ final int parentHeaderTitleRes = ai.metaData.getInt(META_DATA_KEY_PARENT_TITLE);
+ String parentFragmentClass = ai.metaData.getString(META_DATA_KEY_PARENT_FRAGMENT_CLASS);
+ if (parentFragmentClass != null) {
+ mParentHeader = new Header();
+ mParentHeader.fragment = parentFragmentClass;
+ if (parentHeaderTitleRes != 0) {
+ mParentHeader.title = getResources().getString(parentHeaderTitleRes);
+ }
+ }
} catch (NameNotFoundException nnfe) {
}
}