我正在尝试创建一个应用程序，其中有一个锁定/密码屏幕，然后打开所选应用程序以保护您的应用程序。
市场上有一些如：
https://play.google.com/store/apps/details?id=com.domobile.applock&hl=en
这是GitHub上的一个开源软件。 https://github.com/twinone/AppLocker
我意识到即使以上应用程序被杀死，或者ram被清除，或者手机重新启动等等。锁屏仍会显示所选应用程序。
基本上我想要实现他们所做的相同的事情，但是目前我没有用我编写的服务类实现这一点。我可以锁定应用程序，但当应用程序被杀时我不能。我花了很多时间学习待定意图，报警管理器，广播接收器，甚至学习示例源代码
https://github.com/twinone/AppLocker/blob/master/src/com/twinone/locker/lock/AppLockService.java
但我的实施并不成功。
这是我的服务类：
package com.ibc.android.demo.appslist.app;
import android.app.ActivityManager;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.os.IBinder;
import android.util.Log;
import java.io.File;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Timer;
import java.util.TimerTask;
public class HeartBeat extends Service {
private static final String TAG = HeartBeat.class.getSimpleName();
public Timer TIMER;
private static Set<AccessGranted> mAccessGrantedList = new HashSet<AccessGranted>();
private Set<String> mLockedApps = new HashSet<String>();
private long lastModified = 0;
private BroadcastReceiver mScreenStateReceiver;
private BroadcastReceiver mAccessGrantedReceiver;
private File mLockedAppsFile;
ArrayList<String> packagezList;
SharedPreferences sharedPrefs;
Map<String, ?> allEntries;
SharedPreferences sharedPrefsapp;
String prefix;
@Override
public IBinder onBind(Intent arg0) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
startService(new Intent(this, HeartBeat.class));
// Log.i("LocalService", "Received start id " + startId + ": " +
// intent);
// We want this service to continue running until it is explicitly
// stopped, so return sticky.
if (TIMER == null) {
TIMER = new Timer(true);
TIMER.scheduleAtFixedRate(new LockAppsTimerTask(), 1000, 250);
mScreenStateReceiver = new BroadcastReceiver() {
private boolean screenOff;
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
screenOff = true;
} else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
screenOff = false;
}
if (screenOff) {
//Log.i(TAG, "Cancel Timer");
TIMER.cancel();
} else {
// Log.i(TAG, "Restart Timer");
TIMER = new Timer(true);
TIMER.scheduleAtFixedRate(new LockAppsTimerTask(), 1000, 250);
}
}
};
IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
registerReceiver(mScreenStateReceiver, filter);
mAccessGrantedReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
String packageName = intent.getStringExtra("packageName");
if (action.equals(Constants.ACTION_GRANT_ACCESS) && packageName != null) {
AccessGranted ag = new AccessGranted(packageName);
mAccessGrantedList.remove(ag);
mAccessGrantedList.add(ag);
}
}
};
IntentFilter filter2 = new IntentFilter(Constants.ACTION_GRANT_ACCESS);
registerReceiver(mAccessGrantedReceiver, filter2);
}
// this.stopSelf();
//startforeground goes here
return START_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
startService(new Intent(this, HeartBeat.class));
}
private class LockAppsTimerTask extends TimerTask {
@Override
public void run() {
sharedPrefs = getApplicationContext().getSharedPreferences(getApplicationContext().getPackageName(), Context.MODE_PRIVATE);
sharedPrefsapp = getApplicationContext().getSharedPreferences("appdb", Context.MODE_PRIVATE);
allEntries= null;
allEntries = sharedPrefsapp.getAll();
//prefix = "m";
packagezList= null;
packagezList = new ArrayList<String>();
for (Map.Entry<String, ?> entry : allEntries.entrySet()) {
//Log.e("right key: ", entry.getKey() + "right value: " + entry.getValue().toString() );
packagezList.add(entry.getKey());
}
/* for (Map.Entry<String, ?> entry : allEntries.entrySet())
{
//Check if the package name starts with the prefix.
if (entry.getKey().startsWith(prefix)) {
//Add JUST the package name (trim off the prefix).
packagezList.add(entry.getKey().substring(prefix.length()));
packagezList.add(entry.getKey());
}
}*/
for(Object object: packagezList){
Log.e("YO!", (String) object);
}
ActivityManager activityManager = (ActivityManager) getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE);
try {
//List<RecentTaskInfo> recentTasks = activityManager.getRecentTasks(1, ActivityManager.RECENT_IGNORE_UNAVAILABLE);
ActivityManager mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningTaskInfo> RunningTask = mActivityManager
.getRunningTasks(1);
ActivityManager.RunningTaskInfo ar = RunningTask.get(0);
String activityOnTop = ar.topActivity.getPackageName();
// Log.e("activity on Top", "" + activityOnTop);
// Log.e(" My package name", "" + getApplicationContext().getPackageName());
//for (Object data : newArrayList) {
for(Object object: packagezList){
// Provide the packagename(s) of apps here, you want to show password activity
if ((activityOnTop.contains((CharSequence) object)) &&
(!activityOnTop.contains(getApplicationContext().getPackageName()
))) { // you have to make this check even better
Intent i = new Intent(getApplicationContext(), LockScreenActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_NO_ANIMATION);
i.putExtra( "", "");
startActivity(i);
}
}
} catch (Exception e) {
// Log.e("Foreground App", e.getMessage(), e);
}
}
}
}
这是我的LockScreen活动类（所选应用程序打开时显示的屏幕）：
package com.ibc.android.demo.appslist.app;
import android.app.Activity;
import android.app.ActivityManager;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import com.spicycurryman.getdisciplined10.app.R;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
public class LockScreenActivity extends Activity {
private static final String TAG = LockScreenActivity.class.getSimpleName();
Map<String, ?> allEntries;
SharedPreferences sharedPrefsapp;
ArrayList<String> packagezList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_setup);
}
@Override
public void onBackPressed() {
// Grab a list of all running processes and their PIDs.
ActivityManager am = (ActivityManager) getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningAppProcessInfo> pids = am.getRunningAppProcesses();
// Now loop through the list of PIDs and find Instagram's PID.
sharedPrefsapp = getApplicationContext().getSharedPreferences("appdb", Context.MODE_PRIVATE);
allEntries= null;
allEntries = sharedPrefsapp.getAll();
//prefix = "m";
packagezList= null;
packagezList = new ArrayList<String>();
for (Map.Entry<String, ?> entry : allEntries.entrySet()) {
//Log.e("right key: ", entry.getKey() + "right value: " + entry.getValue().toString() );
packagezList.add(entry.getKey());
}
// Killing any process for blocked applications when the back button is pressed while the lock screen is displayed
for(Object object: packagezList){
am.killBackgroundProcesses((String) object);
Log.d("Killed Background Process!: ", (String) object);
}
// Now that we've got the PID, kill the Instagram process.
// Now that we've got the PID, kill the Instagram process.
ActivityManager am1 = (ActivityManager) getApplicationContext().getSystemService(ACTIVITY_SERVICE);
// Display confirmation here, finish() activity.
Intent startMain = new Intent(Intent.ACTION_MAIN);
startMain.addCategory(Intent.CATEGORY_HOME);
startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(startMain);
startService(new Intent(this, HeartBeat.class));
/* Intent iHeartBeatService = new Intent(this, HeartBeat.class);
PendingIntent piHeartBeatService = PendingIntent.getService(this, 0, iHeartBeatService, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.cancel(piHeartBeatService);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 300000, piHeartBeatService);*/
finish();
super.onBackPressed();
}
}
现在我可以锁定应用程序，但是当应用程序被杀或手机重新启动时我不能。当所有应用程序被强制停止或手机重新启动，ram清除等时，Google Play商店中的应用锁定应用仍然可以成功锁定带有PIN码的应用。
我怎样才能实现这一目标？
答案 0 :(得分：2)
我想你应该试试这个......
package com.ankit.vkapplock;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
public class StartupServiceReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)){
context.startService(new Intent(context, HeartBeat.class ));
}
别忘了为boot_completion操作添加权限。
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>