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Making the 'Allow rotation' setting dependent on system state

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The setting will not be available on a tablet, where rotation is
always enabled. On mobiles, it will be disabled when auto-rotate
is disabled in display settings.
Also removing content provider dependency from settings, as its in the
same process as launcher.

Bug: 28704055
Change-Id: Ibe6b1e67411fb0e4b2e36446710f463e4a3d6883
This commit is contained in:
Sunny Goyal
2016-05-12 15:36:20 -07:00
parent f898b970cc
commit f48e59268b
5 changed files with 70 additions and 75 deletions
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101
src/com/android/launcher3/SettingsActivity.java
View File

@@ -17,13 +17,14 @@
package com.android.launcher3;
import android.app.Activity;
import android.os.AsyncTask;
import android.content.ContentResolver;
import android.database.ContentObserver;
import android.os.Bundle;
import android.os.Handler;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceChangeListener;
import android.preference.PreferenceFragment;
import android.preference.PreferenceScreen;
import android.preference.TwoStatePreference;
import android.provider.Settings;
import android.provider.Settings.System;
/**
* Settings activity for Launcher. Currently implements the following setting: Allow rotation
@@ -42,56 +43,70 @@ public class SettingsActivity extends Activity {
/**
* This fragment shows the launcher preferences.
*/
public static class LauncherSettingsFragment extends PreferenceFragment
implements OnPreferenceChangeListener {
public static class LauncherSettingsFragment extends PreferenceFragment {
private SystemDisplayRotationLockObserver mRotationLockObserver;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getPreferenceManager().setSharedPreferencesName(LauncherFiles.SHARED_PREFERENCES_KEY);
addPreferencesFromResource(R.xml.launcher_preferences);
PreferenceScreen screen = getPreferenceScreen();
for (int i = screen.getPreferenceCount() - 1; i >= 0; i--) {
Preference pref = screen.getPreference(i);
if (pref instanceof TwoStatePreference) {
setBooleanPrefUsingContentProvider((TwoStatePreference) pref);
}
// Setup allow rotation preference
Preference rotationPref = findPreference(Utilities.ALLOW_ROTATION_PREFERENCE_KEY);
if (getResources().getBoolean(R.bool.allow_rotation)) {
// Launcher supports rotation by default. No need to show this setting.
getPreferenceScreen().removePreference(rotationPref);
} else {
ContentResolver resolver = getContext().getContentResolver();
mRotationLockObserver = new SystemDisplayRotationLockObserver(rotationPref, resolver);
// Register a content observer to listen for system setting changes while
// this UI is active.
resolver.registerContentObserver(
Settings.System.getUriFor(System.ACCELEROMETER_ROTATION),
false, mRotationLockObserver);
// Initialize the UI once
mRotationLockObserver.onChange(true);
rotationPref.setDefaultValue(Utilities.getAllowRotationDefaultValue(getContext()));
}
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
Bundle extras = new Bundle();
extras.putBoolean(LauncherSettings.Settings.EXTRA_VALUE, (Boolean) newValue);
getActivity().getContentResolver().call(
LauncherSettings.Settings.CONTENT_URI,
LauncherSettings.Settings.METHOD_SET_BOOLEAN,
preference.getKey(), extras);
return true;
public void onDestroy() {
if (mRotationLockObserver != null) {
getContext().getContentResolver().unregisterContentObserver(mRotationLockObserver);
mRotationLockObserver = null;
}
super.onDestroy();
}
}
/**
* Content observer which listens for system auto-rotate setting changes, and enables/disables
* the launcher rotation setting accordingly.
*/
private static class SystemDisplayRotationLockObserver extends ContentObserver {
private final Preference mRotationPref;
private final ContentResolver mResolver;
public SystemDisplayRotationLockObserver(
Preference rotationPref, ContentResolver resolver) {
super(new Handler());
mRotationPref = rotationPref;
mResolver = resolver;
}
private void setBooleanPrefUsingContentProvider(final TwoStatePreference pref) {
pref.setPersistent(false);
pref.setEnabled(false);
new AsyncTask<Void, Void, Boolean>() {
@Override
protected Boolean doInBackground(Void... params) {
Bundle extras = new Bundle();
extras.putBoolean(LauncherSettings.Settings.EXTRA_DEFAULT_VALUE, true);
Bundle value = pref.getContext().getContentResolver().call(
LauncherSettings.Settings.CONTENT_URI,
LauncherSettings.Settings.METHOD_GET_BOOLEAN,
pref.getKey(), extras);
return value.getBoolean(LauncherSettings.Settings.EXTRA_VALUE);
}
@Override
protected void onPostExecute(Boolean aBoolean) {
pref.setChecked(aBoolean);
pref.setEnabled(true);
pref.setOnPreferenceChangeListener(LauncherSettingsFragment.this);
}
}.execute();
@Override
public void onChange(boolean selfChange) {
boolean enabled = Settings.System.getInt(mResolver,
Settings.System.ACCELEROMETER_ROTATION, 1) == 1;
mRotationPref.setEnabled(enabled);
mRotationPref.setSummary(enabled
? R.string.allow_rotation_desc : R.string.allow_rotation_blocked_desc);
}
}
}