app_Settings/src/com/android/settings/DevelopmentSettings.java

/*
 * Copyright (C) 2008 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;

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.ContentResolver;
import android.content.DialogInterface;
import android.os.BatteryManager;
import android.os.Build;
import android.os.Bundle;
import android.os.SystemProperties;
import android.preference.CheckBoxPreference;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceFragment;
import android.preference.PreferenceScreen;
import android.preference.Preference.OnPreferenceChangeListener;
import android.provider.Settings;

/*
 * Displays preferences for application developers.
 */
public class DevelopmentSettings extends PreferenceFragment
        implements DialogInterface.OnClickListener, DialogInterface.OnDismissListener,
                OnPreferenceChangeListener {

    private static final String ENABLE_ADB = "enable_adb";
    private static final String KEEP_SCREEN_ON = "keep_screen_on";
    private static final String ALLOW_MOCK_LOCATION = "allow_mock_location";
    private static final String HDCP_CHECKING_KEY = "hdcp_checking";
    private static final String HDCP_CHECKING_PROPERTY = "persist.sys.hdcp_checking";

    private CheckBoxPreference mEnableAdb;
    private CheckBoxPreference mKeepScreenOn;
    private CheckBoxPreference mAllowMockLocation;

    // To track whether Yes was clicked in the adb warning dialog
    private boolean mOkClicked;

    private Dialog mOkDialog;

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);

        addPreferencesFromResource(R.xml.development_prefs);

        mEnableAdb = (CheckBoxPreference) findPreference(ENABLE_ADB);
        mKeepScreenOn = (CheckBoxPreference) findPreference(KEEP_SCREEN_ON);
        mAllowMockLocation = (CheckBoxPreference) findPreference(ALLOW_MOCK_LOCATION);

        removeHdcpOptionsForProduction();
    }

    private void removeHdcpOptionsForProduction() {
        if ("user".equals(Build.TYPE)) {
            Preference hdcpChecking = findPreference(HDCP_CHECKING_KEY);
            if (hdcpChecking != null) {
                // Remove the preference
                getPreferenceScreen().removePreference(hdcpChecking);
            }
        }
    }

    @Override
    public void onResume() {
        super.onResume();

        final ContentResolver cr = getActivity().getContentResolver();
        mEnableAdb.setChecked(Settings.Secure.getInt(cr,
                Settings.Secure.ADB_ENABLED, 0) != 0);
        mKeepScreenOn.setChecked(Settings.System.getInt(cr,
                Settings.System.STAY_ON_WHILE_PLUGGED_IN, 0) != 0);
        mAllowMockLocation.setChecked(Settings.Secure.getInt(cr,
                Settings.Secure.ALLOW_MOCK_LOCATION, 0) != 0);
        updateHdcpValues();
    }

    private void updateHdcpValues() {
        int index = 1; // Defaults to drm-only. Needs to match with R.array.hdcp_checking_values
        ListPreference hdcpChecking = (ListPreference) findPreference(HDCP_CHECKING_KEY);
        if (hdcpChecking != null) {
            String currentValue = SystemProperties.get(HDCP_CHECKING_PROPERTY);
            String[] values = getResources().getStringArray(R.array.hdcp_checking_values);
            String[] summaries = getResources().getStringArray(R.array.hdcp_checking_summaries);
            for (int i = 0; i < values.length; i++) {
                if (currentValue.equals(values[i])) {
                    index = i;
                    break;
                }
            }
            hdcpChecking.setValue(values[index]);
            hdcpChecking.setSummary(summaries[index]);
            hdcpChecking.setOnPreferenceChangeListener(this);
        }
    }

    @Override
    public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {

        if (Utils.isMonkeyRunning()) {
            return false;
        }

        if (preference == mEnableAdb) {
            if (mEnableAdb.isChecked()) {
                mOkClicked = false;
                if (mOkDialog != null) dismissDialog();
                mOkDialog = new AlertDialog.Builder(getActivity()).setMessage(
                        getActivity().getResources().getString(R.string.adb_warning_message))
                        .setTitle(R.string.adb_warning_title)
                        .setIcon(android.R.drawable.ic_dialog_alert)
                        .setPositiveButton(android.R.string.yes, this)
                        .setNegativeButton(android.R.string.no, this)
                        .show();
                mOkDialog.setOnDismissListener(this);
            } else {
                Settings.Secure.putInt(getActivity().getContentResolver(),
                        Settings.Secure.ADB_ENABLED, 0);
            }
        } else if (preference == mKeepScreenOn) {
            Settings.System.putInt(getActivity().getContentResolver(),
                    Settings.System.STAY_ON_WHILE_PLUGGED_IN, 
                    mKeepScreenOn.isChecked() ? 
                    (BatteryManager.BATTERY_PLUGGED_AC | BatteryManager.BATTERY_PLUGGED_USB) : 0);
        } else if (preference == mAllowMockLocation) {
            Settings.Secure.putInt(getActivity().getContentResolver(),
                    Settings.Secure.ALLOW_MOCK_LOCATION,
                    mAllowMockLocation.isChecked() ? 1 : 0);
        }

        return false;
    }

    private void dismissDialog() {
        if (mOkDialog == null) return;
        mOkDialog.dismiss();
        mOkDialog = null;
    }

    public void onClick(DialogInterface dialog, int which) {
        if (which == DialogInterface.BUTTON_POSITIVE) {
            mOkClicked = true;
            Settings.Secure.putInt(getActivity().getContentResolver(),
                    Settings.Secure.ADB_ENABLED, 1);
        } else {
            // Reset the toggle
            mEnableAdb.setChecked(false);
        }
    }

    public void onDismiss(DialogInterface dialog) {
        // Assuming that onClick gets called first
        if (!mOkClicked) {
            mEnableAdb.setChecked(false);
        }
    }

    @Override
    public void onDestroy() {
        dismissDialog();
        super.onDestroy();
    }

    @Override
    public boolean onPreferenceChange(Preference preference, Object newValue) {
        if (HDCP_CHECKING_KEY.equals(preference.getKey())) {
            SystemProperties.set(HDCP_CHECKING_PROPERTY, newValue.toString());
            updateHdcpValues();
            return true;
        }
        return false;
    }
}