コードを通知クラスに作り直しました。実行するたびに、Nullポインター例外が吐き出されます。もう一度ここにコードがあります:
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.widget.RemoteViews;
public class kickStart extends Activity {
NotificationManager nm;
Context context = this;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Notification notification = new Notification();
RemoteViews contentView = new RemoteViews(getPackageName(), R.layout.note);
contentView.setImageViewResource(R.id.icon, R.drawable.ic_launcher);
contentView.setTextViewText(R.id.title, "Custom notification");
contentView.setTextViewText(R.id.text, "This is a custom layout");
notification.contentView = contentView;
Intent notificationIntent = new Intent(this, MainActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
notification.contentIntent = contentIntent;
notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
int CUSTOM_VIEW_ID = 10;
nm.notify(CUSTOM_VIEW_ID, notification);
}
}
ここで質問があります: なぜ NPE になっているのですか? どうすれば修正できますか?
これがログキャットです
07-21 17:58:33.360: W/dalvikvm(6511): threadid=1: thread exiting with uncaught exception (group=0x40018560)
07-21 17:58:33.360: E/AndroidRuntime(6511): FATAL EXCEPTION: main
07-21 17:58:33.360: E/AndroidRuntime(6511): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.this/com.example.this.kickStart}: java.lang.NullPointerException
07-21 17:58:33.360: E/AndroidRuntime(6511): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
07-21 17:58:33.360: E/AndroidRuntime(6511): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
07-21 17:58:33.360: E/AndroidRuntime(6511): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
07-21 17:58:33.360: E/AndroidRuntime(6511): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
07-21 17:58:33.360: E/AndroidRuntime(6511): at android.os.Handler.dispatchMessage(Handler.java:99)
07-21 17:58:33.360: E/AndroidRuntime(6511): at android.os.Looper.loop(Looper.java:130)
07-21 17:58:33.360: E/AndroidRuntime(6511): at android.app.ActivityThread.main(ActivityThread.java:3683)
07-21 17:58:33.360: E/AndroidRuntime(6511): at java.lang.reflect.Method.invokeNative(Native Method)
07-21 17:58:33.360: E/AndroidRuntime(6511): at java.lang.reflect.Method.invoke(Method.java:507)
07-21 17:58:33.360: E/AndroidRuntime(6511): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
07-21 17:58:33.360: E/AndroidRuntime(6511): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
07-21 17:58:33.360: E/AndroidRuntime(6511): at dalvik.system.NativeStart.main(Native Method)
07-21 17:58:33.360: E/AndroidRuntime(6511): Caused by: java.lang.NullPointerException
07-21 17:58:33.360: E/AndroidRuntime(6511): at com.example.this.kickStart.onCreate(kickStart.java:29)
07-21 17:58:33.360: E/AndroidRuntime(6511): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
07-21 17:58:33.360: E/AndroidRuntime(6511): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
07-21 17:58:33.360: E/AndroidRuntime(6511): ... 11 more