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Commit c163eb07 authored by Shai Barack's avatar Shai Barack
Browse files

Delete "background process limit" debug option

We're deprecating max limits for cached/empty app processes.

Bug: 253908413
Change-Id: Iff80f173e72e9b77faefe3c66543c0756f2e6f74
Flag: EXEMPT cleaning up now-unused flag
parent 2e872644
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+0 −6
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@@ -675,12 +675,6 @@
            android:title="@string/immediately_destroy_activities"
            android:summary="@string/immediately_destroy_activities_summary" />

        <ListPreference
            android:key="app_process_limit"
            android:title="@string/app_process_limit_title"
            android:entries="@array/app_process_limit_entries"
            android:entryValues="@array/app_process_limit_values" />

        <Preference
            android:key="background_check"
            android:fragment="com.android.settings.applications.appops.BackgroundCheckSummary"
+0 −104
Original line number Diff line number Diff line
/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.settings.development;

import android.app.ActivityManager;
import android.app.IActivityManager;
import android.content.Context;
import android.os.RemoteException;

import androidx.annotation.VisibleForTesting;
import androidx.preference.ListPreference;
import androidx.preference.Preference;

import com.android.settings.core.PreferenceControllerMixin;
import com.android.settingslib.R;
import com.android.settingslib.development.DeveloperOptionsPreferenceController;

public class BackgroundProcessLimitPreferenceController extends
        DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener,
        PreferenceControllerMixin {

    private static final String APP_PROCESS_LIMIT_KEY = "app_process_limit";

    private final String[] mListValues;
    private final String[] mListSummaries;

    public BackgroundProcessLimitPreferenceController(Context context) {
        super(context);

        mListValues = context.getResources().getStringArray(R.array.app_process_limit_values);
        mListSummaries = context.getResources().getStringArray(R.array.app_process_limit_entries);
    }

    @Override
    public String getPreferenceKey() {
        return APP_PROCESS_LIMIT_KEY;
    }

    @Override
    public boolean onPreferenceChange(Preference preference, Object newValue) {
        writeAppProcessLimitOptions(newValue);
        updateAppProcessLimitOptions();
        return true;
    }

    @Override
    public void updateState(Preference preference) {
        updateAppProcessLimitOptions();
    }

    @Override
    protected void onDeveloperOptionsSwitchDisabled() {
        super.onDeveloperOptionsSwitchDisabled();
        writeAppProcessLimitOptions(null);
    }

    private void updateAppProcessLimitOptions() {
        try {
            final int limit = getActivityManagerService().getProcessLimit();
            int index = 0; // default
            for (int i = 0; i < mListValues.length; i++) {
                int val = Integer.parseInt(mListValues[i]);
                if (val >= limit) {
                    index = i;
                    break;
                }
            }
            final ListPreference listPreference = (ListPreference) mPreference;
            listPreference.setValue(mListValues[index]);
            listPreference.setSummary(mListSummaries[index]);
        } catch (RemoteException e) {
            // intentional no-op
        }
    }

    private void writeAppProcessLimitOptions(Object newValue) {
        try {
            final int limit = newValue != null ? Integer.parseInt(newValue.toString()) : -1;
            getActivityManagerService().setProcessLimit(limit);
            updateAppProcessLimitOptions();
        } catch (RemoteException e) {
            // intentional no-op
        }
    }

    @VisibleForTesting
    IActivityManager getActivityManagerService() {
        return ActivityManager.getService();
    }
}
+0 −1
Original line number Diff line number Diff line
@@ -740,7 +740,6 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
        controllers.add(new StrictModePreferenceController(context));
        controllers.add(new ProfileGpuRenderingPreferenceController(context));
        controllers.add(new KeepActivitiesPreferenceController(context));
        controllers.add(new BackgroundProcessLimitPreferenceController(context));
        controllers.add(new CachedAppsFreezerPreferenceController(context));
        controllers.add(new ShowFirstCrashDialogPreferenceController(context));
        controllers.add(new AppsNotRespondingPreferenceController(context));
+0 −132
Original line number Diff line number Diff line
/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.settings.development;

import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import android.app.IActivityManager;
import android.content.Context;
import android.os.RemoteException;

import androidx.preference.ListPreference;
import androidx.preference.PreferenceScreen;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.RuntimeEnvironment;

@RunWith(RobolectricTestRunner.class)
public class BackgroundProcessLimitPreferenceControllerTest {

    @Mock
    private IActivityManager mActivityManager;
    @Mock
    private ListPreference mPreference;
    @Mock
    private PreferenceScreen mScreen;

    /**
     * 0: Standard limit
     * 1: No Background processes
     * 2: At most 1 process
     * 3: At most 2 processes
     * 4: At most 3 processes
     * 5: At most 4 processes
     */
    private String[] mListValues;
    private String[] mListSummaries;
    private Context mContext;
    private BackgroundProcessLimitPreferenceController mController;

    @Before
    public void setup() {
        MockitoAnnotations.initMocks(this);
        mContext = RuntimeEnvironment.application;
        mListValues = mContext.getResources()
                .getStringArray(com.android.settingslib.R.array.app_process_limit_values);
        mListSummaries = mContext.getResources()
                .getStringArray(com.android.settingslib.R.array.app_process_limit_entries);
        mController = spy(new BackgroundProcessLimitPreferenceController(mContext));
        doReturn(mActivityManager).when(mController).getActivityManagerService();
        when(mScreen.findPreference(mController.getPreferenceKey())).thenReturn(mPreference);
        mController.displayPreference(mScreen);
    }

    @Test
    public void onPreferenceChange_noBackgroundProcessSet_shouldSetToNoBackgroundProcess()
            throws RemoteException {
        mController.onPreferenceChange(mPreference, mListValues[1]);

        verify(mActivityManager).setProcessLimit(Integer.valueOf(mListValues[1]));
    }

    @Test
    public void onPreferenceChange_1ProcessSet_shouldSetTo1BackgroundProcess()
            throws RemoteException {
        mController.onPreferenceChange(mPreference, mListValues[2]);

        verify(mActivityManager).setProcessLimit(Integer.valueOf(mListValues[2]));
    }

    @Test
    public void updateState_noBackgroundProcessSet_shouldSetPreferenceToNoBackgroundProcess()
            throws RemoteException {
        when(mActivityManager.getProcessLimit()).thenReturn(Integer.valueOf(mListValues[1]));

        mController.updateState(mPreference);

        verify(mPreference).setValue(mListValues[1]);
        verify(mPreference).setSummary(mListSummaries[1]);
    }

    @Test
    public void updateState_1ProcessSet_shouldSetPreference1BackgroundProcess()
            throws RemoteException {
        when(mActivityManager.getProcessLimit()).thenReturn(Integer.valueOf(mListValues[2]));

        mController.updateState(mPreference);

        verify(mPreference).setValue(mListValues[2]);
        verify(mPreference).setSummary(mListSummaries[2]);
    }

    @Test
    public void updateState_veryHighLimit_shouldDefaultToStandardLimit() throws RemoteException {
        when(mActivityManager.getProcessLimit()).thenReturn(Integer.MAX_VALUE);

        mController.updateState(mPreference);

        verify(mPreference).setValue(mListValues[0]);
        verify(mPreference).setSummary(mListSummaries[0]);
    }

    @Test
    public void onDeveloperOptionsSwitchDisabled_shouldDisableAndResetPreference()
            throws RemoteException {
        mController.onDeveloperOptionsSwitchDisabled();

        verify(mPreference).setEnabled(false);
        verify(mActivityManager).setProcessLimit(-1);
    }
}