我遇到了一个问题，一旦设备重新启动，我的计划任务就停止了工作。我被告知这是Alarm Manager的正常行为，我应该使用BOOT_COMPLETED操作。不幸的是，它仍然无法正常工作。这就是我所拥有的
主/启动器活动
public class launch_activity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_launch_activity);
File dbFile = new File(getFilesDir(), "bk.db");
if(!dbFile.exists()) {
try {
InputStream localDB = getAssets().open("bk.db");
OutputStream newDB = new FileOutputStream(dbFile);
byte[] buffer = new byte[1024];
int read;
while ((read = localDB.read(buffer)) > 0) {
newDB.write(buffer, 0 , read);
}
localDB.close();
newDB.close();
} catch(IOException e) {
Log.e(this.getClass().toString(), "IO Error!");
}
}
SharedPreferences preferences = getSharedPreferences("config", MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();
if(!(preferences.contains("User"))) {
editor.putString("User", "admin");
editor.putString("Pass", "admin");
editor.commit();
}
}
protected void onStart() {
super.onStart();
SharedPreferences preferences = getSharedPreferences("config", MODE_PRIVATE);
Intent i = new Intent(this, screenSaver.class);
startService(i);
if (!(preferences.getBoolean("configured", false))) { // app has not yet been set-up
// set the timer
Intent downloadIntent = new Intent(launch_activity.this, downloadReceiver.class);
PendingIntent pending = PendingIntent.getBroadcast(launch_activity.this, 0, downloadIntent, 0);
final Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(System.currentTimeMillis());
cal.set(Calendar.HOUR_OF_DAY, 4);
final AlarmManager manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
manager.setInexactRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis() + 1000, AlarmManager.INTERVAL_DAY, pending);
class downloadFinishedReceiver extends BroadcastReceiver {
private DownloadManager dManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if(DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
long downloadID = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0);
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(downloadID);
Cursor cursor = dManager.query(query);
if(cursor.moveToFirst()) {
int colIndex = cursor.getColumnIndex(DownloadManager.COLUMN_STATUS);
if (DownloadManager.STATUS_SUCCESSFUL == cursor.getInt(colIndex)) {
String uri = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_FILENAME));
File file = new File(Uri.parse(uri).getPath());
Log.e("passing", "success");
try {
FileInputStream inputStream = new FileInputStream(file);
FileOutputStream fileOutputStream = context.openFileOutput(databaseHelper.DB_NAME, Context.MODE_PRIVATE);
byte[] buffer = new byte[1024];
Log.e("passing", "try");
int read;
while ((read = inputStream.read(buffer)) > 0) {
fileOutputStream.write(buffer, 0 , read);
}
fileOutputStream.close();
inputStream.close();
databaseHelper db = new databaseHelper(context);
db.copyDB();
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
Log.e("passing", "close");
} catch (Exception ex) {
Log.e("Exception", ex.getMessage() + uri);
}
}
}
}
}
};
registerReceiver(new downloadFinishedReceiver(), new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
Intent reminderHourlyIntent = new Intent(this, hourlyReminder.class);
PendingIntent reminderHourly = PendingIntent.getActivity(this, 0,reminderHourlyIntent, 0);
Calendar newCal = Calendar.getInstance();
int nextHour = 60 - newCal.get(Calendar.MINUTE);
newCal.add(Calendar.MINUTE, nextHour);
// manager.setRepeating(AlarmManager.RTC_WAKEUP, newCal.getTimeInMillis() - (1000 * 60 * 10), 1000 * 60 * 60, reminderHourly);
manager.setRepeating(AlarmManager.RTC_WAKEUP, 60000, 1500 * 60, reminderHourly );
Intent reminderIntent = new Intent(this, reminder.class);
PendingIntent reminder = PendingIntent.getActivity(this, 0, reminderIntent, 0);
// manager.setRepeating(AlarmManager.RTC_WAKEUP, newCal.getTimeInMillis(), 1000 * 60 * 60 * 4, reminder );
manager.setRepeating(AlarmManager.RTC_WAKEUP, 1000 * 60 * 3, 1000 * 60 * 3, reminder );
// redirect to set up
Intent intent = new Intent(this, midamcorp.com.burgerkingapp.preferences.class);
intent.putExtra("setUp", true);
startActivity(intent);
return;
} else {
Calendar cal = Calendar.getInstance();
if (cal.get(Calendar.HOUR_OF_DAY) > 4 && cal.get(Calendar.HOUR_OF_DAY) < 10) // between 4 - 10 AM
{
Intent intent = new Intent(this, breakfastHome.class);
startActivity(intent);
} else if ((cal.get(Calendar.HOUR_OF_DAY) == 10 && cal.get(Calendar.MINUTE) < 28)) { // between 10 - 10:28 AM
Intent intent = new Intent(this, breakfastHome.class);
startActivity(intent);
} else {
Intent intent = new Intent(this, lunchHome.class);
startActivity(intent);
}
}
}
protected void onResume() {
super.onResume();
this.onStart();
}
}
bootReceiver
public class bootReceiver extends BroadcastReceiver{
@Override
public void onReceive(final Context c, Intent i) {
if(i.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
Intent downloadIntent = new Intent(c, downloadReceiver.class);
PendingIntent pending = PendingIntent.getBroadcast(c, 0, downloadIntent, 0);
final Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(System.currentTimeMillis());
cal.set(Calendar.HOUR_OF_DAY, 4);
final AlarmManager manager = (AlarmManager)c.getSystemService(Context.ALARM_SERVICE);
manager.setInexactRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis() + 1000, AlarmManager.INTERVAL_DAY, pending);
class downloadFinishedReceiver extends BroadcastReceiver {
private DownloadManager dManager = (DownloadManager) c.getSystemService(c.DOWNLOAD_SERVICE);
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if(DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
long downloadID = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0);
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(downloadID);
Cursor cursor = dManager.query(query);
if(cursor.moveToFirst()) {
int colIndex = cursor.getColumnIndex(DownloadManager.COLUMN_STATUS);
if (DownloadManager.STATUS_SUCCESSFUL == cursor.getInt(colIndex)) {
String uri = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_FILENAME));
File file = new File(Uri.parse(uri).getPath());
Log.e("passing", "success");
try {
FileInputStream inputStream = new FileInputStream(file);
FileOutputStream fileOutputStream = context.openFileOutput(databaseHelper.DB_NAME, Context.MODE_PRIVATE);
byte[] buffer = new byte[1024];
Log.e("passing", "try");
int read;
while ((read = inputStream.read(buffer)) > 0) {
fileOutputStream.write(buffer, 0 , read);
}
fileOutputStream.close();
inputStream.close();
databaseHelper db = new databaseHelper(context);
db.copyDB();
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
Log.e("passing", "close");
} catch (Exception ex) {
Log.e("Exception", ex.getMessage() + uri);
}
}
}
}
}
};
c.registerReceiver(new downloadFinishedReceiver(), new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
Intent reminderHourlyIntent = new Intent(c, hourlyReminder.class);
PendingIntent reminderHourly = PendingIntent.getActivity(c, 0,reminderHourlyIntent, 0);
Calendar newCal = Calendar.getInstance();
int nextHour = 60 - newCal.get(Calendar.MINUTE);
newCal.add(Calendar.MINUTE, nextHour);
// manager.setRepeating(AlarmManager.RTC_WAKEUP, newCal.getTimeInMillis() - (1000 * 60 * 10), 1000 * 60 * 60, reminderHourly);
manager.setRepeating(AlarmManager.RTC_WAKEUP, 60000, 1500 * 60, reminderHourly );
Intent reminderIntent = new Intent(c, reminder.class);
PendingIntent reminder = PendingIntent.getActivity(c, 0, reminderIntent, 0);
// manager.setRepeating(AlarmManager.RTC_WAKEUP, newCal.getTimeInMillis(), 1000 * 60 * 60 * 4, reminder );
manager.setRepeating(AlarmManager.RTC_WAKEUP, 1000 * 60 * 3, 1000 * 60 * 3, reminder );
}
}
}
和我的清单：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="midamcorp.com.burgerkingapp"
android:versionCode="1"
android:versionName="1.0">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<service
android:name=".screenSaver"
android:enabled="true"
android:exported="true"
android:label=""
android:permission="android.permission.BIND_DREAM_SERVICE">
<intent-filter>
<action android:name="android.service.dreams.DreamService" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</service>
<receiver android:name=".downloadReceiver" />
<receiver android:name=".bootReceiver"
>
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"></action>
</intent-filter>
</receiver>
<activity android:name=".launch_activity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".lunchHome"
android:label="@string/title_activity_lunch_home"
android:theme="@style/AppTheme.NoActionBar" />
<activity
android:name=".breakfastHome"
android:label="@string/title_activity_breakfast_home"
android:theme="@style/AppTheme.NoActionBar" />
<activity
android:name=".lunchLTOs"
android:label="@string/title_activity_lunch_ltos"
android:parentActivityName=".lunchHome"
android:theme="@style/AppTheme.NoActionBar">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="midamcorp.com.burgerkingapp.lunchHome" />
</activity>
<activity
android:name=".lunchStandard"
android:label="@string/title_activity_lunch_standard"
android:parentActivityName=".lunchHome"
android:theme="@style/AppTheme.NoActionBar">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="midamcorp.com.burgerkingapp.lunchHome" />
</activity>
<activity
android:name=".breakfastStandard"
android:label="@string/title_activity_breakfast_standard"
android:parentActivityName=".breakfastHome"
android:theme="@style/AppTheme.NoActionBar">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="midamcorp.com.burgerkingapp.breakfastHome" />
</activity>
<activity
android:name=".breakfastLTO"
android:label="@string/title_activity_breakfast_lto"
android:parentActivityName=".breakfastHome"
android:theme="@style/AppTheme.NoActionBar">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="midamcorp.com.burgerkingapp.breakfastHome" />
</activity>
<activity
android:name=".preferences"
android:label="Preferences"
android:parentActivityName=".launch_activity">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="midamcorp.com.burgerkingapp.launch_activity" />
</activity>
<activity
android:name=".login"
android:label="@string/title_activity_login"
android:parentActivityName=".launch_activity"
android:theme="@style/AppTheme.NoActionBar">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="midamcorp.com.burgerkingapp.launch_activity" />
</activity>
<activity
android:name=".buildImage"
android:configChanges="orientation|keyboardHidden|screenSize"
android:label="@string/title_activity_build_image"
android:theme="@style/AppTheme.NoActionBar" />
<activity
android:name=".changePass"
android:label="@string/title_activity_change_pass"
android:parentActivityName=".preferences"
android:theme="@style/AppTheme.NoActionBar">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="midamcorp.com.burgerkingapp.preferences" />
</activity>
<activity
android:name=".storePicker"
android:theme="@style/Theme.AppCompat.Dialog" />
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main"
android:theme="@style/AppTheme.NoActionBar" />
<activity android:name=".hourlyReminder"
android:theme="@style/Theme.AppCompat.Dialog.Alert"/>
<activity android:name=".reminder"
android:theme="@style/Theme.AppCompat.Dialog.Alert"></activity>
</application>
</manifest>
这给我带来了一些麻烦;我真的很感激任何帮助。
答案 0 :(得分：0)
虽然这已经很老了，但我最近遇到了类似的issue。解决方案是清理项目，重建和重新生成APK。不确定Android Studio是否会缓存旧的APK，或者是否有些内容被连续版本搞砸了，但这解决了我的问题。
此外，尝试在重新启动手机之前手动重新启动应用程序/发出BOOT意图将应用程序从停止状态中删除。