我正在尝试制作一个应用程序，在你打开选定的应用程序之前有一个锁定密码屏幕，以保护你的应用程序。
有一些在市场上，如。
https:/play.google.comstoreappsdetails?id=com.domobile.applock&hl=en。
这里是GitHub上的一个开源的。https:/github.comtwinoneAppLocker。
我意识到，即使上述应用程序被杀死，或RAM的被清除，或手机重新启动等。锁屏仍然会显示出所选应用。
本质上我想实现和他们一样的事情，但目前我写的服务类还不能实现。我可以锁定应用程序，但当应用程序被杀死时，我不能。我花了大量时间学习待定意图、报警管理器、广播接收器，甚至研究示例源代码
https:/github.comtwinoneAppLockerbmastersrccomtwinonelockerlockAppLockService.java。
但我没有成功实现。
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（当所选应用打开时显示的屏幕）。
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，我能够锁定应用程序，但当应用程序被杀死或手机重新启动时，我不能锁定。Google Play Store上的应用锁应用在所有应用被强行停止或手机重启、清除内存等情况下，仍然可以成功地用pin锁定应用。
如何才能实现像那些有？
我想你应该尝试这个...
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 ));
}
不要忘了添加permisson的boot_completion动作。
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>