android Mitteilung Android Runtime: FATAL AUSNAHME

Question

ich möchte ein kleines Benachrichtigungsprogramm machen, und ich erhalte diese Störung Bitten irgendeine ich brauche es für mein Projekt helfen kann

11-19 23:42:40.297 5971-5971/com.example.codeiv.ewtest E/AndroidRuntime: FATAL EXCEPTION: main 
                    Process: com.example.codeiv.ewtest, PID: 5971 
                    java.lang.IllegalStateException: Could not execute method for android:onClick 
                     at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293) 
                     at android.view.View.performClick(View.java:5198) 
                     at android.view.View$PerformClick.run(View.java:21147) 
                     at android.os.Handler.handleCallback(Handler.java:739) 
                     at android.os.Handler.dispatchMessage(Handler.java:95) 
                     at android.os.Looper.loop(Looper.java:148) 
                     at android.app.ActivityThread.main(ActivityThread.java:5417) 
                     at java.lang.reflect.Method.invoke(Native Method) 
                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
                     Caused by: java.lang.reflect.InvocationTargetException 
                     at java.lang.reflect.Method.invoke(Native Method) 
                     at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) 
                     at android.view.View.performClick(View.java:5198)  
                     at android.view.View$PerformClick.run(View.java:21147)  
                     at android.os.Handler.handleCallback(Handler.java:739)  
                     at android.os.Handler.dispatchMessage(Handler.java:95)  
                     at android.os.Looper.loop(Looper.java:148)  
                     at android.app.ActivityThread.main(ActivityThread.java:5417)  
                     at java.lang.reflect.Method.invoke(Native Method)  
                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)  
                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)  
                     Caused by: java.lang.IllegalArgumentException: Invalid notification (no valid small icon): Notification(pri=0 contentView=com.example.codeiv.ewtest/0x1090085 vibrate=null sound=null defaults=0x0 flags=0x0 color=0x00000000 vis=PRIVATE) 
                     at android.app.NotificationManager.notify(NotificationManager.java:222) 
                     at android.app.NotificationManager.notify(NotificationManager.java:194) 
                     at com.example.codeiv.ewtest.main_menu.test1(main_menu.java:54) 
                     at java.lang.reflect.Method.invoke(Native Method)  
                     at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)  
                     at android.view.View.performClick(View.java:5198)  
                     at android.view.View$PerformClick.run(View.java:21147)  
                     at android.os.Handler.handleCallback(Handler.java:739)  
                     at android.os.Handler.dispatchMessage(Handler.java:95)  
                     at android.os.Looper.loop(Looper.java:148)  
                     at android.app.ActivityThread.main(ActivityThread.java:5417)  
                     at java.lang.reflect.Method.invoke(Native Method)  
                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)  
                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)  

11-19 23: 42: 42,658 5971 -5971/com.example.codeiv.ewtest I/Prozess: Sendersignal. PID: 5971 SIG: 9

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main_menu); 
} 

public void inf(View view) { 
    Intent intent = new Intent(this , nfo.class); 
    startActivity(intent); 
} 

public void test1(View view){ 
    int mId=1; 
    NotificationCompat.Builder mBuilder = 
      new NotificationCompat.Builder(this) 
        .setContentTitle("My notification") 
        .setContentText("Hello World!"); 
    Intent resultIntent = new Intent(this, nfo.class); 
    TaskStackBuilder stackBuilder = TaskStackBuilder.create(this); 
    stackBuilder.addParentStack(nfo.class); 
    stackBuilder.addNextIntent(resultIntent); 
    PendingIntent resultPendingIntent = 
      stackBuilder.getPendingIntent(
        0, 
        PendingIntent.FLAG_UPDATE_CURRENT 
      ); 
    mBuilder.setContentIntent(resultPendingIntent); 
    NotificationManager mNotificationManager = 
      (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); 
    mNotificationManager.notify(mId, mBuilder.build()); 

    mId++; 
} 

Answer 1

setzen ein Symbol für die notitification (Sie android Studio Standardsymbol für den Test verwenden können) und Ihre Schaltfläche onClick Methodennamen dh test1 stellen Sie sicher,() ist der gleiche wie der Name Ihrer Set in den Eigenschaften der Schaltfläche Attribute.

NotificationCompat.Builder mBuilder = 
     new NotificationCompat.Builder(this) 
       .setContentTitle("My notification") 
       .setContentText("Hello World!"); 
       .setSmallIcon(R.drawable.cast_ic_notification_0)