这是我第一个使用服务的应用程序。获取 java.lang.RuntimeException:无法启动服务 java.lang.NullPointerException。我的目的是在设备处于挂起状态时发送短信。
发送短信.java
package com.qualcomm.sendsms;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import android.view.Menu;
public class SENDSMS extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sendsms);
String phone_num = null;
String sms = null;
String sleep_time = null;
Bundle extras = getIntent().getExtras();
if (extras != null) {
phone_num = extras.getString("Phone_Number");
Log.e("????????????????SEND_SMS", "phno : "+phone_num);
sms = extras.getString("SMS_Body");
Log.e("????????????????SEND_SMS", "sms : "+sms);
sleep_time = extras.getString("Sleep_Time");
Log.e("????????????????Sleep_Time", "sleep_time : "+sleep_time);
Intent myIntent = new Intent(this, sendservicesms.class);
myIntent.putExtra("Phone_Number",phone_num);
myIntent.putExtra("SMS_Body",sms);
myIntent.putExtra("Sleep_Time",sleep_time);
startService(myIntent);
}
finish();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.sendsm, menu);
return true;
}
}
服务:sendservicesms.java
package com.qualcomm.sendsms;
import android.app.IntentService;
import android.content.Intent;
import android.os.Bundle;
import android.os.IBinder;
import android.telephony.SmsManager;
import android.util.Log;
import android.widget.Toast;
public class sendservicesms extends IntentService {
int mStartMode; // indicates how to behave if the service is killed
IBinder mBinder; // interface for clients that bind
boolean mAllowRebind; // indicates whether onRebind should be used
public sendservicesms() {
super("sendservicesms");
}
public void onCreate() {
// The service is being created
}
@Override
protected void onHandleIntent(Intent intent) {
// The service is starting, due to a call to startService()
if(intent!=null) {
Bundle param = intent.getExtras();
if (param != null) {
String phone_no = (String)param.get("Phone_Number");
String sms_body = (String)param.get("SMS_Body");
String sleeptime = (String)param.get("Sleep_Time");
Log.e("????????????????SEND_SMS", "phno : "+phone_no);
Log.e("????????????????SEND_SMS", "sms : "+sms_body);
Log.e("????????????????Sleep_Time", "sleep_time : "+sleeptime);
Long time = Long.parseLong(sleeptime);
Log.e("????????????????time long", "Long_time : "+time);
try {
if(sleeptime!=null && sleeptime.length() > 0){
Thread.sleep(Long.parseLong(sleeptime));
}
Log.e("????????????????Sleep happened well", "sleep_time : "+sleeptime);
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(phone_no, null, sms_body, null, null);
Toast.makeText(getApplicationContext(), "SMS Sent!",
Toast.LENGTH_LONG).show();
} catch (Exception e) {
Toast.makeText(getApplicationContext(),
"SMS faild, please try again later!",
Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
}
}
@Override
public IBinder onBind(Intent intent) {
// A client is binding to the service with bindService()
return mBinder;
}
@Override
public boolean onUnbind(Intent intent) {
// All clients have unbound with unbindService()
return mAllowRebind;
}
@Override
public void onRebind(Intent intent) {
// A client is binding to the service with bindService(),
// after onUnbind() has already been called
}
@Override
public void onDestroy() {
// The service is no longer used and is being destroyed
}
}
日志猫:
E/AndroidRuntime(10276): FATAL EXCEPTION: main
E/AndroidRuntime(10276): java.lang.RuntimeException: Unable to start service com.qualcomm.sendsms.sendservicesms@418dd170 with Intent { cmp=com.qualcomm.sendsms/.sendservicesms (has extras) }: java.lang.NullPointerException
E/AndroidRuntime(10276): at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2676)
E/AndroidRuntime(10276): at android.app.ActivityThread.access$1900(ActivityThread.java:144)
E/AndroidRuntime(10276): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1334)
E/AndroidRuntime(10276): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(10276): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime(10276): at android.app.ActivityThread.main(ActivityThread.java:5074)
E/AndroidRuntime(10276): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(10276): at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime(10276): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
E/AndroidRuntime(10276): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
E/AndroidRuntime(10276): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(10276): Caused by: java.lang.NullPointerException
E/AndroidRuntime(10276): at android.app.IntentService.onStart(IntentService.java:116)
E/AndroidRuntime(10276): at android.app.IntentService.onStartCommand(IntentService.java:130)
E/AndroidRuntime(10276): at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2659)