samples/browseable/DeviceOwner/src/com.example.android.deviceowner/DeviceOwnerFragment.java - platform/development - Git at Google

 /*
  * Copyright (C) 2015 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.example.android.deviceowner;

 import android.app.Activity;
 import android.app.Fragment;
 import android.app.admin.DevicePolicyManager;
 import android.content.ComponentName;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.SharedPreferences;
 import android.content.pm.ResolveInfo;
 import android.os.Bundle;
 import android.provider.Settings;
 import android.support.annotation.Nullable;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Button;
 import android.widget.CompoundButton;
 import android.widget.SimpleAdapter;
 import android.widget.Spinner;
 import android.widget.Switch;

 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;

 /**
  * Demonstrates the usage of the most common device management APIs for the device owner case.
  * In addition to various features available for profile owners, device owners can perform extra
  * actions, such as configuring global settings and enforcing a preferred Activity for a specific
  * IntentFilter.
  */
 public class DeviceOwnerFragment extends Fragment {

     // Keys for SharedPreferences
     private static final String PREFS_DEVICE_OWNER = "DeviceOwnerFragment";
     private static final String PREF_LAUNCHER = "launcher";

     private DevicePolicyManager mDevicePolicyManager;

     // View references
     private Switch mSwitchAutoTime;
     private Switch mSwitchAutoTimeZone;
     private Spinner mAvailableLaunchers;
     private Button mButtonLauncher;

     // Adapter for the spinner to show list of available launchers
     private LauncherAdapter mAdapter;

     /**
      * Handles events on the Switches.
      */
     private Switch.OnCheckedChangeListener mOnCheckedChangeListener
             = new Switch.OnCheckedChangeListener() {

         @Override
         public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
             switch (buttonView.getId()) {
                 case R.id.switch_auto_time:
                     setBooleanGlobalSetting(Settings.Global.AUTO_TIME, isChecked);
                     retrieveCurrentSettings(getActivity());
                     break;
                 case R.id.switch_auto_time_zone:
                     setBooleanGlobalSetting(Settings.Global.AUTO_TIME_ZONE, isChecked);
                     retrieveCurrentSettings(getActivity());
                     break;
             }
         }

     };

     /**
      * Handles click events on the Button.
      */
     private View.OnClickListener mOnClickListener
             = new View.OnClickListener() {

         @Override
         public void onClick(View v) {
             switch (v.getId()) {
                 case R.id.set_preferred_launcher:
                     if (loadPersistentPreferredLauncher(getActivity()) == null) {
                         setPreferredLauncher();
                     } else {
                         clearPreferredLauncher();
                     }
                     retrieveCurrentSettings(getActivity());
                     break;
             }
         }

     };

     /**
      * @return A newly instantiated {@link DeviceOwnerFragment}.
      */
     public static DeviceOwnerFragment newInstance() {
         return new DeviceOwnerFragment();
     }

     @Nullable
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         return inflater.inflate(R.layout.fragment_device_owner, container, false);
     }

     @Override
     public void onViewCreated(View view, Bundle savedInstanceState) {
         // Retain references
         mSwitchAutoTime = (Switch) view.findViewById(R.id.switch_auto_time);
         mSwitchAutoTimeZone = (Switch) view.findViewById(R.id.switch_auto_time_zone);
         mAvailableLaunchers = (Spinner) view.findViewById(R.id.available_launchers);
         mButtonLauncher = (Button) view.findViewById(R.id.set_preferred_launcher);
         // Bind event handlers
         mSwitchAutoTime.setOnCheckedChangeListener(mOnCheckedChangeListener);
         mSwitchAutoTimeZone.setOnCheckedChangeListener(mOnCheckedChangeListener);
         mButtonLauncher.setOnClickListener(mOnClickListener);
     }

     @Override
     public void onAttach(Activity activity) {
         super.onAttach(activity);
         mDevicePolicyManager =
                 (DevicePolicyManager) activity.getSystemService(Activity.DEVICE_POLICY_SERVICE);
     }

     @Override
     public void onDetach() {
         mDevicePolicyManager = null;
         super.onDetach();
     }

     @Override
     public void onResume() {
         super.onResume();
         Activity activity = getActivity();
         if (activity != null) {
             retrieveCurrentSettings(activity);
         }
     }

     /**
      * Retrieves the current global settings and changes the UI accordingly.
      *
      * @param activity The activity
      */
     private void retrieveCurrentSettings(Activity activity) {
         // Global settings
         setCheckedSafely(mSwitchAutoTime,
                 getBooleanGlobalSetting(activity.getContentResolver(), Settings.Global.AUTO_TIME));
         setCheckedSafely(mSwitchAutoTimeZone,
                 getBooleanGlobalSetting(activity.getContentResolver(),
                         Settings.Global.AUTO_TIME_ZONE));

         // Launcher
         Intent intent = new Intent(Intent.ACTION_MAIN);
         intent.addCategory(Intent.CATEGORY_HOME);
         List<ResolveInfo> list = activity.getPackageManager()
                 .queryIntentActivities(intent, /* default flags */ 0);
         mAdapter = new LauncherAdapter(activity, list);
         mAvailableLaunchers.setAdapter(mAdapter);
         String packageName = loadPersistentPreferredLauncher(activity);
         if (packageName == null) { // No preferred launcher is set
             mAvailableLaunchers.setEnabled(true);
             mButtonLauncher.setText(R.string.set_as_preferred);
         } else {
             int position = -1;
             for (int i = 0; i < list.size(); ++i) {
                 if (list.get(i).activityInfo.packageName.equals(packageName)) {
                     position = i;
                     break;
                 }
             }
             if (position != -1) {
                 mAvailableLaunchers.setSelection(position);
                 mAvailableLaunchers.setEnabled(false);
                 mButtonLauncher.setText(R.string.clear_preferred);
             }
         }
     }

     /**
      * Retrieves the current boolean value of the specified global setting.
      *
      * @param resolver The ContentResolver
      * @param setting  The setting to be retrieved
      * @return The current boolean value
      */
     private static boolean getBooleanGlobalSetting(ContentResolver resolver, String setting) {
         return 0 != Settings.Global.getInt(resolver, setting, 0);
     }

     /**
      * Sets the boolean value of the specified global setting.
      *
      * @param setting The setting to be set
      * @param value   The value to be set
      */
     private void setBooleanGlobalSetting(String setting, boolean value) {
         mDevicePolicyManager.setGlobalSetting(
                 // The ComponentName of the device owner
                 DeviceOwnerReceiver.getComponentName(getActivity()),
                 // The settings to be set
                 setting,
                 // The value we write here is a string representation for SQLite
                 value ? "1" : "0");
     }

     /**
      * A utility method to set the checked state of the button without invoking its listener.
      *
      * @param button  The button
      * @param checked The value to be set
      */
     private void setCheckedSafely(CompoundButton button, boolean checked) {
         button.setOnCheckedChangeListener(null);
         button.setChecked(checked);
         button.setOnCheckedChangeListener(mOnCheckedChangeListener);
     }

     /**
      * Loads the package name from SharedPreferences.
      *
      * @param activity The activity
      * @return The package name of the launcher currently set as preferred, or null if there is no
      * preferred launcher.
      */
     private static String loadPersistentPreferredLauncher(Activity activity) {
         return activity.getSharedPreferences(PREFS_DEVICE_OWNER, Context.MODE_PRIVATE)
                 .getString(PREF_LAUNCHER, null);
     }

     /**
      * Saves the package name into SharedPreferences.
      *
      * @param activity    The activity
      * @param packageName The package name to be saved. Pass null to remove the preferred launcher.
      */
     private static void savePersistentPreferredLauncher(Activity activity, String packageName) {
         SharedPreferences.Editor editor = activity.getSharedPreferences(PREFS_DEVICE_OWNER,
                 Context.MODE_PRIVATE).edit();
         if (packageName == null) {
             editor.remove(PREF_LAUNCHER);
         } else {
             editor.putString(PREF_LAUNCHER, packageName);
         }
         editor.apply();
     }

     /**
      * Sets the selected launcher as preferred.
      */
     private void setPreferredLauncher() {
         Activity activity = getActivity();
         if (activity == null) {
             return;
         }
         IntentFilter filter = new IntentFilter(Intent.ACTION_MAIN);
         filter.addCategory(Intent.CATEGORY_HOME);
         filter.addCategory(Intent.CATEGORY_DEFAULT);
         ComponentName componentName = mAdapter.getComponentName(
                 mAvailableLaunchers.getSelectedItemPosition());
         mDevicePolicyManager.addPersistentPreferredActivity(
                 DeviceOwnerReceiver.getComponentName(activity), filter, componentName);
         savePersistentPreferredLauncher(activity, componentName.getPackageName());
     }

     /**
      * Clears the launcher currently set as preferred.
      */
     private void clearPreferredLauncher() {
         Activity activity = getActivity();
         if (activity == null) {
             return;
         }
         mDevicePolicyManager.clearPackagePersistentPreferredActivities(
                 DeviceOwnerReceiver.getComponentName(activity),
                 loadPersistentPreferredLauncher(activity));
         savePersistentPreferredLauncher(activity, null);
     }

     /**
      * Shows list of {@link ResolveInfo} in a {@link Spinner}.
      */
     private static class LauncherAdapter extends SimpleAdapter {

         private static final String KEY_PACKAGE_NAME = "package_name";
         private static final String KEY_ACTIVITY_NAME = "activity_name";

         public LauncherAdapter(Context context, List<ResolveInfo> list) {
             super(context, createData(list), android.R.layout.simple_list_item_1,
                     new String[]{KEY_PACKAGE_NAME},
                     new int[]{android.R.id.text1});
         }

         private static List<HashMap<String, String>> createData(List<ResolveInfo> list) {
             List<HashMap<String, String>> data = new ArrayList<>();
             for (ResolveInfo info : list) {
                 HashMap<String, String> map = new HashMap<>();
                 map.put(KEY_PACKAGE_NAME, info.activityInfo.packageName);
                 map.put(KEY_ACTIVITY_NAME, info.activityInfo.name);
                 data.add(map);
             }
             return data;
         }

         public ComponentName getComponentName(int position) {
             @SuppressWarnings("unchecked")
             HashMap<String, String> map = (HashMap<String, String>) getItem(position);
             return new ComponentName(map.get(KEY_PACKAGE_NAME), map.get(KEY_ACTIVITY_NAME));
         }

     }

 }
	/*
	* Copyright (C) 2015 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.example.android.deviceowner;

	import android.app.Activity;
	import android.app.Fragment;
	import android.app.admin.DevicePolicyManager;
	import android.content.ComponentName;
	import android.content.ContentResolver;
	import android.content.Context;
	import android.content.Intent;
	import android.content.IntentFilter;
	import android.content.SharedPreferences;
	import android.content.pm.ResolveInfo;
	import android.os.Bundle;
	import android.provider.Settings;
	import android.support.annotation.Nullable;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.ViewGroup;
	import android.widget.Button;
	import android.widget.CompoundButton;
	import android.widget.SimpleAdapter;
	import android.widget.Spinner;
	import android.widget.Switch;

	import java.util.ArrayList;
	import java.util.HashMap;
	import java.util.List;

	/**
	* Demonstrates the usage of the most common device management APIs for the device owner case.
	* In addition to various features available for profile owners, device owners can perform extra
	* actions, such as configuring global settings and enforcing a preferred Activity for a specific
	* IntentFilter.
	*/
	public class DeviceOwnerFragment extends Fragment {

	// Keys for SharedPreferences
	private static final String PREFS_DEVICE_OWNER = "DeviceOwnerFragment";
	private static final String PREF_LAUNCHER = "launcher";

	private DevicePolicyManager mDevicePolicyManager;

	// View references
	private Switch mSwitchAutoTime;
	private Switch mSwitchAutoTimeZone;
	private Spinner mAvailableLaunchers;
	private Button mButtonLauncher;

	// Adapter for the spinner to show list of available launchers
	private LauncherAdapter mAdapter;

	/**
	* Handles events on the Switches.
	*/
	private Switch.OnCheckedChangeListener mOnCheckedChangeListener
	= new Switch.OnCheckedChangeListener() {

	@Override
	public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
	switch (buttonView.getId()) {
	case R.id.switch_auto_time:
	setBooleanGlobalSetting(Settings.Global.AUTO_TIME, isChecked);
	retrieveCurrentSettings(getActivity());
	break;
	case R.id.switch_auto_time_zone:
	setBooleanGlobalSetting(Settings.Global.AUTO_TIME_ZONE, isChecked);
	retrieveCurrentSettings(getActivity());
	break;
	}
	}

	};

	/**
	* Handles click events on the Button.
	*/
	private View.OnClickListener mOnClickListener
	= new View.OnClickListener() {

	@Override
	public void onClick(View v) {
	switch (v.getId()) {
	case R.id.set_preferred_launcher:
	if (loadPersistentPreferredLauncher(getActivity()) == null) {
	setPreferredLauncher();
	} else {
	clearPreferredLauncher();
	}
	retrieveCurrentSettings(getActivity());
	break;
	}
	}

	};

	/**
	* @return A newly instantiated {@link DeviceOwnerFragment}.
	*/
	public static DeviceOwnerFragment newInstance() {
	return new DeviceOwnerFragment();
	}

	@Nullable
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
	Bundle savedInstanceState) {
	return inflater.inflate(R.layout.fragment_device_owner, container, false);
	}

	@Override
	public void onViewCreated(View view, Bundle savedInstanceState) {
	// Retain references
	mSwitchAutoTime = (Switch) view.findViewById(R.id.switch_auto_time);
	mSwitchAutoTimeZone = (Switch) view.findViewById(R.id.switch_auto_time_zone);
	mAvailableLaunchers = (Spinner) view.findViewById(R.id.available_launchers);
	mButtonLauncher = (Button) view.findViewById(R.id.set_preferred_launcher);
	// Bind event handlers
	mSwitchAutoTime.setOnCheckedChangeListener(mOnCheckedChangeListener);
	mSwitchAutoTimeZone.setOnCheckedChangeListener(mOnCheckedChangeListener);
	mButtonLauncher.setOnClickListener(mOnClickListener);
	}

	@Override
	public void onAttach(Activity activity) {
	super.onAttach(activity);
	mDevicePolicyManager =
	(DevicePolicyManager) activity.getSystemService(Activity.DEVICE_POLICY_SERVICE);
	}

	@Override
	public void onDetach() {
	mDevicePolicyManager = null;
	super.onDetach();
	}

	@Override
	public void onResume() {
	super.onResume();
	Activity activity = getActivity();
	if (activity != null) {
	retrieveCurrentSettings(activity);
	}
	}

	/**
	* Retrieves the current global settings and changes the UI accordingly.
	*
	* @param activity The activity
	*/
	private void retrieveCurrentSettings(Activity activity) {
	// Global settings
	setCheckedSafely(mSwitchAutoTime,
	getBooleanGlobalSetting(activity.getContentResolver(), Settings.Global.AUTO_TIME));
	setCheckedSafely(mSwitchAutoTimeZone,
	getBooleanGlobalSetting(activity.getContentResolver(),
	Settings.Global.AUTO_TIME_ZONE));

	// Launcher
	Intent intent = new Intent(Intent.ACTION_MAIN);
	intent.addCategory(Intent.CATEGORY_HOME);
	List<ResolveInfo> list = activity.getPackageManager()
	.queryIntentActivities(intent, /* default flags */ 0);
	mAdapter = new LauncherAdapter(activity, list);
	mAvailableLaunchers.setAdapter(mAdapter);
	String packageName = loadPersistentPreferredLauncher(activity);
	if (packageName == null) { // No preferred launcher is set
	mAvailableLaunchers.setEnabled(true);
	mButtonLauncher.setText(R.string.set_as_preferred);
	} else {
	int position = -1;
	for (int i = 0; i < list.size(); ++i) {
	if (list.get(i).activityInfo.packageName.equals(packageName)) {
	position = i;
	break;
	}
	}
	if (position != -1) {
	mAvailableLaunchers.setSelection(position);
	mAvailableLaunchers.setEnabled(false);
	mButtonLauncher.setText(R.string.clear_preferred);
	}
	}
	}

	/**
	* Retrieves the current boolean value of the specified global setting.
	*
	* @param resolver The ContentResolver
	* @param setting The setting to be retrieved
	* @return The current boolean value
	*/
	private static boolean getBooleanGlobalSetting(ContentResolver resolver, String setting) {
	return 0 != Settings.Global.getInt(resolver, setting, 0);
	}

	/**
	* Sets the boolean value of the specified global setting.
	*
	* @param setting The setting to be set
	* @param value The value to be set
	*/
	private void setBooleanGlobalSetting(String setting, boolean value) {
	mDevicePolicyManager.setGlobalSetting(
	// The ComponentName of the device owner
	DeviceOwnerReceiver.getComponentName(getActivity()),
	// The settings to be set
	setting,
	// The value we write here is a string representation for SQLite
	value ? "1" : "0");
	}

	/**
	* A utility method to set the checked state of the button without invoking its listener.
	*
	* @param button The button
	* @param checked The value to be set
	*/
	private void setCheckedSafely(CompoundButton button, boolean checked) {
	button.setOnCheckedChangeListener(null);
	button.setChecked(checked);
	button.setOnCheckedChangeListener(mOnCheckedChangeListener);
	}

	/**
	* Loads the package name from SharedPreferences.
	*
	* @param activity The activity
	* @return The package name of the launcher currently set as preferred, or null if there is no
	* preferred launcher.
	*/
	private static String loadPersistentPreferredLauncher(Activity activity) {
	return activity.getSharedPreferences(PREFS_DEVICE_OWNER, Context.MODE_PRIVATE)
	.getString(PREF_LAUNCHER, null);
	}

	/**
	* Saves the package name into SharedPreferences.
	*
	* @param activity The activity
	* @param packageName The package name to be saved. Pass null to remove the preferred launcher.
	*/
	private static void savePersistentPreferredLauncher(Activity activity, String packageName) {
	SharedPreferences.Editor editor = activity.getSharedPreferences(PREFS_DEVICE_OWNER,
	Context.MODE_PRIVATE).edit();
	if (packageName == null) {
	editor.remove(PREF_LAUNCHER);
	} else {
	editor.putString(PREF_LAUNCHER, packageName);
	}
	editor.apply();
	}

	/**
	* Sets the selected launcher as preferred.
	*/
	private void setPreferredLauncher() {
	Activity activity = getActivity();
	if (activity == null) {
	return;
	}
	IntentFilter filter = new IntentFilter(Intent.ACTION_MAIN);
	filter.addCategory(Intent.CATEGORY_HOME);
	filter.addCategory(Intent.CATEGORY_DEFAULT);
	ComponentName componentName = mAdapter.getComponentName(
	mAvailableLaunchers.getSelectedItemPosition());
	mDevicePolicyManager.addPersistentPreferredActivity(
	DeviceOwnerReceiver.getComponentName(activity), filter, componentName);
	savePersistentPreferredLauncher(activity, componentName.getPackageName());
	}

	/**
	* Clears the launcher currently set as preferred.
	*/
	private void clearPreferredLauncher() {
	Activity activity = getActivity();
	if (activity == null) {
	return;
	}
	mDevicePolicyManager.clearPackagePersistentPreferredActivities(
	DeviceOwnerReceiver.getComponentName(activity),
	loadPersistentPreferredLauncher(activity));
	savePersistentPreferredLauncher(activity, null);
	}

	/**
	* Shows list of {@link ResolveInfo} in a {@link Spinner}.
	*/
	private static class LauncherAdapter extends SimpleAdapter {

	private static final String KEY_PACKAGE_NAME = "package_name";
	private static final String KEY_ACTIVITY_NAME = "activity_name";

	public LauncherAdapter(Context context, List<ResolveInfo> list) {
	super(context, createData(list), android.R.layout.simple_list_item_1,
	new String[]{KEY_PACKAGE_NAME},
	new int[]{android.R.id.text1});
	}

	private static List<HashMap<String, String>> createData(List<ResolveInfo> list) {
	List<HashMap<String, String>> data = new ArrayList<>();
	for (ResolveInfo info : list) {
	HashMap<String, String> map = new HashMap<>();
	map.put(KEY_PACKAGE_NAME, info.activityInfo.packageName);
	map.put(KEY_ACTIVITY_NAME, info.activityInfo.name);
	data.add(map);
	}
	return data;
	}

	public ComponentName getComponentName(int position) {
	@SuppressWarnings("unchecked")
	HashMap<String, String> map = (HashMap<String, String>) getItem(position);
	return new ComponentName(map.get(KEY_PACKAGE_NAME), map.get(KEY_ACTIVITY_NAME));
	}

	}

	}