我已经为事件通知程序编写了代码。将设置一个事件时间，届时警报将响起。我可以设置闹钟。但是报警页面不起作用。它在开始活动时停止。alertActivity.java 的代码是：
package com.example.eventmanager;
import java.io.File;
import com.example.alarmmanager.R;
import android.app.Activity;
import android.database.Cursor;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class AlertActivity extends Activity implements OnClickListener{
String save;
TextView ques;
TextView eventname;
Button bt;
Ringtone r;
File dir = Environment.getExternalStorageDirectory();
Bundle extras = getIntent().getExtras();
String ename = extras.getString("ename");
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setContentView(R.layout.alert_layout);
Uri noti = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE);
r = RingtoneManager.getRingtone(getApplicationContext(), noti);
r.play();
}
public void DisplayQuestion(final Cursor c) {
ques.setText(c.getString(1));
eventname.setText(ename);
bt.setOnClickListener(this);
}
@Override
public void onClick(View v) {
Toast.makeText(this, "Alerm Has been Disabled", Toast.LENGTH_SHORT).show();
r.stop();
//try {
//Intent i = new Intent(this,MainActivity.class);
//i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
//startActivity(i);
//}
//catch (Exception e) {}
}
}
这是主要活动的代码：
package com.example.eventmanager;
import java.util.Calendar;
import com.example.alarmmanager.R;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TimePicker;
import android.widget.Toast;
public class MainActivity extends Activity {
MediaPlayer mp;
EditText name;
private ScheduleClient scheduleClient;
private DatePicker picker;
private TimePicker timePic;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
scheduleClient = new ScheduleClient(this);
scheduleClient.doBindService();
picker = (DatePicker) findViewById(R.id.scheduleTimePicker);
timePic = (TimePicker) findViewById(R.id.timePicer);
name = (EditText) findViewById(R.id.editText1);
}
public void onDateSelectedButtonClick(View v){
int day = picker.getDayOfMonth();
int month = picker.getMonth();
int year = picker.getYear();
Calendar c = Calendar.getInstance();
c.set(year, month, day);
c.set(Calendar.HOUR_OF_DAY, timePic.getCurrentHour());
c.set(Calendar.MINUTE, timePic.getCurrentMinute());
c.set(Calendar.SECOND, 0);
String ename = name.toString();
Intent i = new Intent(getApplicationContext(), AlertActivity.class);
i.putExtra("ename",ename);
scheduleClient.setAlarmForNotification(c);
Toast.makeText(this, "Notification set for: "+ day +"/"+ (month+1) +"/"+ year, Toast.LENGTH_SHORT).show();
}
@Override
protected void onStop() {
if(scheduleClient != null)
scheduleClient.doUnbindService();
super.onStop();
}
}
这是我的日志：
09-12 13:04:00.822: I/NotifyService(12836): onCreate()
09-12 13:04:00.827: I/LocalService(12836): Received start id 1: Intent { flg=0x4 cmp=com.example.alarmmanager/com.example.eventmanager.NotifyService (has extras) }
09-12 13:04:00.842: I/power(2300): *** acquire_dvfs_lock : lockType : 1 freq : 1000000
09-12 13:04:00.842: D/PowerManagerService(2300): acquireDVFSLockLocked : type : DVFS_MIN_LIMIT frequency : 1000000 uid : 1000 pid : 2300 tag : ActivityManager
09-12 13:04:00.847: W/ActivityManager(2300): mDVFSLock.acquire()
09-12 13:04:00.877: D/ApplicationPolicy(2300): isStatusBarNotificationAllowed: packageName = com.example.alarmmanager
09-12 13:04:00.877: D/STATUSBAR-NotificationService(2300): Noti Alert - mSystemReady:true, AlertEnabled:true
09-12 13:04:00.877: D/PhoneStatusBar(2625): addNotification score=0
09-12 13:04:00.897: D/WindowManager(2300): PhoneWindowManager: focusChangedLw
09-12 13:04:00.897: D/KeyguardViewMediator(2300): setHidden false
09-12 13:04:00.897: D/AndroidRuntime(12836): Shutting down VM
09-12 13:04:00.897: W/dalvikvm(12836): threadid=1: thread exiting with uncaught exception (group=0x410152a0)
09-12 13:04:00.897: D/WindowManager(2300): mInputFocus is not null.
09-12 13:04:00.897: D/WindowManager(2300): mInputFocus is not null.
09-12 13:04:00.897: D/WindowManager(2300): mInputFocus is not null.
09-12 13:04:00.902: E/AndroidRuntime(12836): FATAL EXCEPTION: main
09-12 13:04:00.902: E/AndroidRuntime(12836): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.alarmmanager/com.example.eventmanager.AlertActivity}: java.lang.NullPointerException
09-12 13:04:00.902: E/AndroidRuntime(12836): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2024)
09-12 13:04:00.902: E/AndroidRuntime(12836): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
09-12 13:04:00.902: E/AndroidRuntime(12836): at android.app.ActivityThread.access$600(ActivityThread.java:140)
09-12 13:04:00.902: E/AndroidRuntime(12836): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
09-12 13:04:00.902: E/AndroidRuntime(12836): at android.os.Handler.dispatchMessage(Handler.java:99)
09-12 13:04:00.902: E/AndroidRuntime(12836): at android.os.Looper.loop(Looper.java:137)
09-12 13:04:00.902: E/AndroidRuntime(12836): at android.app.ActivityThread.main(ActivityThread.java:4898)
09-12 13:04:00.902: E/AndroidRuntime(12836): at java.lang.reflect.Method.invokeNative(Native Method)
09-12 13:04:00.902: E/AndroidRuntime(12836): at java.lang.reflect.Method.invoke(Method.java:511)
09-12 13:04:00.902: E/AndroidRuntime(12836): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
09-12 13:04:00.902: E/AndroidRuntime(12836): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
09-12 13:04:00.902: E/AndroidRuntime(12836): at dalvik.system.NativeStart.main(Native Method)
09-12 13:04:00.902: E/AndroidRuntime(12836): Caused by: java.lang.NullPointerException
09-12 13:04:00.902: E/AndroidRuntime(12836): at com.example.eventmanager.AlertActivity.<init>(AlertActivity.java:35)
09-12 13:04:00.902: E/AndroidRuntime(12836): at java.lang.Class.newInstanceImpl(Native Method)
09-12 13:04:00.902: E/AndroidRuntime(12836): at java.lang.Class.newInstance(Class.java:1319)
09-12 13:04:00.902: E/AndroidRuntime(12836): at android.app.Instrumentation.newActivity(Instrumentation.java:1057)
09-12 13:04:00.902: E/AndroidRuntime(12836): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2015)
09-12 13:04:00.902: E/AndroidRuntime(12836): ... 11 more
09-12 13:04:00.902: D/StatusBar(2625): expanding top notification at 3entry.userCollapsed() = false
09-12 13:04:00.912: D/WindowManager(2300): PhoneWindowManager: focusChangedLw
09-12 13:04:00.912: E/android.os.Debug(2300): !@Dumpstate > dumpstate -k -t -z -d -o /data/log/dumpstate_app_error
09-12 13:04:00.912: D/WindowManager(2300): mInputFocus is not null.
09-12 13:04:00.917: I/dumpstate(13518): begin
09-12 13:04:01.117: I/InputReader(2300): Touch event's action is 0x0 (deviceType=0) [pCnt=1, s=0.460 ]
09-12 13:04:01.152: I/InputReader(2300): Touch event's action is 0x1 (deviceType=0) [pCnt=1, s=]
09-12 13:04:01.322: D/KeyguardViewMediator(2300): setHidden false
09-12 13:04:01.322: I/SurfaceFlinger(1908): id=334 Removed Uoast idx=6 MapSz=4
09-12 13:04:01.322: I/SurfaceFlinger(1908): id=334 Removed Uoast idx=-2 MapSz=4
09-12 13:04:01.322: D/KeyguardViewMediator(2300): setHidden false
09-12 13:04:01.322: D/PowerManagerService(2300): releaseWakeLockLocked flags=0x0 tag=KEEP_SCREEN_ON_FLAG myUID=1000 myPID=2300 myTID=2524
09-12 13:04:01.327: D/KeyguardViewMediator(2300): setHidden false