Die Anwendung abstürzt in SetcontentView (Meine Aktivität), die meine Klasse verwendet erweitert Schaltfläche

Ich habe eine class Sapper Button extends Button erstellt, und Schaltflächen dieses Typs sind im Layout. In desiner Fenster sehe ich:Die Anwendung abstürzt in SetcontentView (Meine Aktivität), die meine Klasse verwendet erweitert Schaltfläche

castom view SupperButton is not using the 2- or 3- argument. View constructors. XML attributes will not work.

Und meine App wird nach dem Start dieses Layout bei setContentView(R.layout.activity_game); abgestürzt. Warum und wie man es repariert? Hier ist der Anfang meiner Aktivität:

package com.example.helen.mynewgamesapper; 

import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.TextView; 

public class GameActivity extends Activity implements View.OnClickListener { 


    int numBombs; 
    Button[][] fields; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_game); 
     TextView numBombText = (TextView) findViewById(R.id.numBombText); 

     Intent intent = getIntent(); 
     numBombs = intent.getIntExtra("numBombs", 10); 


     numBombText.setText("Number of bombs is: " + numBombs);

mein Layout:

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    > 
    <LinearLayout 
     android:id="@+id/numBombs" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_centerVertical="true" 
     android:weightSum="1.0" 
     android:paddingTop="5pt" 
     android:paddingBottom="5pt" 
     android:background="@android:color/background_dark" 
     android:layout_alignParentTop="true"> 


     <TextView 
      android:id="@+id/numBombText" 
      android:layout_marginTop="30dp" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_gravity="center_horizontal" 
      android:text="@string/test" 
      android:textStyle="bold" 
      android:textSize="12sp"> 
     </TextView> 

    </LinearLayout> 


    <LinearLayout 
     android:layout_below="@id/numBombs" 
     android:id="@+id/lin123" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_centerVertical="true" 

     android:paddingTop="5pt" 
     android:paddingBottom="5pt" 
     android:weightSum="1.0"> 
     <com.example.helen.mynewgamesapper.SapperButton android:layout_width="0dp" 
      android:id="@+id/btn1" 
      android:layout_height="wrap_content" 
      android:layout_weight="0.1" 
      android:background="#f1f1c8" 
      android:textColor="#00ecfd" 
      android:gravity="center" 
      /> 
     <com.example.helen.mynewgamesapper.SapperButton android:layout_width="0dp" 
      android:id="@+id/btn2" 
      android:layout_height="wrap_content" 
      android:layout_weight="0.1" 
      android:background="#f1f1c8" 
      android:textColor="#00ecfd" 
      android:gravity="center" 
      /> 
     <com.example.helen.mynewgamesapper.SapperButton android:layout_width="0dp" 
      android:id="@+id/btn3" 
      android:layout_height="wrap_content" 
      android:layout_weight="0.1" 
      android:background="#f1f1c8" 
      android:textColor="#00ecfd" 
      android:gravity="center" 
      /> 
    <com.example.helen.mynewgamesapper.SapperButton android:layout_width="0dp" 
     android:id="@+id/btn4" 
     android:layout_height="wrap_content" 
     android:layout_weight="0.1" 
     android:background="#f1f1c8" 
     android:textColor="#00ecfd" 
     android:gravity="center" 
     /> 
    <com.example.helen.mynewgamesapper.SapperButton android:layout_width="0dp" 
     android:id="@+id/btn5" 
     android:layout_height="wrap_content" 
     android:layout_weight="0.1" 
     android:background="#f1f1c8" 
     android:textColor="#00ecfd" 
     android:gravity="center" 
     /> 
    <com.example.helen.mynewgamesapper.SapperButton android:layout_width="0dp" 
     android:id="@+id/btn6" 
     android:layout_height="wrap_content" 
     android:layout_weight="0.1" 
     android:background="#f1f1c8" 
     android:textColor="#00ecfd" 
     android:gravity="center" 
     /> 
    <com.example.helen.mynewgamesapper.SapperButton android:layout_width="0dp" 
     android:id="@+id/btn7" 
     android:layout_height="wrap_content" 
     android:layout_weight="0.1" 
     android:background="#f1f1c8" 
     android:textColor="#00ecfd" 
     android:gravity="center" 
     /> 
    <com.example.helen.mynewgamesapper.SapperButton android:layout_width="0dp" 
     android:id="@+id/btn8" 
     android:layout_height="wrap_content" 
     android:layout_weight="0.1" 
     android:background="#f1f1c8" 
     android:textColor="#00ecfd" 
     android:gravity="center" 
     /> 
    <com.example.helen.mynewgamesapper.SapperButton android:layout_width="0dp" 
     android:id="@+id/btn9" 
     android:layout_height="wrap_content" 
     android:layout_weight="0.1" 
     android:background="#f1f1c8" 
     android:textColor="#00ecfd" 
     android:gravity="center" 
     /> 
    <com.example.helen.mynewgamesapper.SapperButton android:layout_width="0dp" 
     android:id="@+id/btn10" 
     android:layout_height="wrap_content" 
     android:layout_weight="0.1" 
     android:background="#f1f1c8" 
     android:textColor="#00ecfd" 
     android:gravity="center" 
     /> 

</LinearLayout>

meine Button-Klasse:

package com.example.helen.mynewgamesapper; 

import android.content.Context; 
import android.widget.Button; 

public class SapperButton extends Button { 

    private boolean isOpen = false; 
    private boolean isBomb = false; 
    private boolean isBlown = false; 
    /* 
     public SapperButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 
      super(context, attrs, defStyleAttr, defStyleRes); 
     } 

    public SapperButton(Context context, AttributeSet attrs, int defStyleAttr) { 
     super(context, attrs, defStyleAttr); 
    } 

    public SapperButton(Context context, AttributeSet attrs) { 
     super(context, attrs); 
    } 

    */ 
    public SapperButton(Context context) { 
     super(context); 
    } 




    public boolean isOpen() 
    { 
     return isOpen; 
    } 

public void setOpen(boolean open) 
{ 
    isOpen = open; 
} 
public void setBomb(boolean bomb) 
{ 
    isBomb = bomb; 
} 

public boolean getIsBomb() 
{ 
    return isBomb; 
} 


public boolean isBlown() 
{ 
    return isBlown; 
} 

public void setBlowned(boolean isBlowning) 
{ 
    isBlown = isBlowning; 
}

}

lo g Krachen:

03-26 19:03:58.874 31921-31921/com.example.helen.mynewgamesapper E/AndroidRuntime: FATAL EXCEPTION: mainProcess: com.example.helen.mynewgamesapper, PID:java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.helen.mynewgamesapper/com.example.helen.mynewgamesapper.GameActivity}: android.view.InflateException: Binary XML file line #42: Error inflating class com.example.helen.mynewgamesapper.SapperButton                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2358) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2410) 
at android.app.ActivityThread.access$800(ActivityThread.java:155) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1331) 
at android.os.Handler.dispatchMessage(Handler.java:110) 
at android.os.Looper.loop(Looper.java:193) 
at android.app.ActivityThread.main(ActivityThread.java:5395) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:515) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:837) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:653) 
at dalvik.system.NativeStart.main(Native Method) 
                         Caused by: android.view.InflateException: Binary XML file line #42: Error inflating class com.example.helen.mynewgamesapper.SapperButton 
at android.view.LayoutInflater.createView(LayoutInflater.java:603) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696) 
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 
at android.view.LayoutInflater.rInflate(LayoutInflater.java:758) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:312) 
at android.app.Activity.setContentView(Activity.java:1952) 
at com.example.helen.mynewgamesapper.GameActivity.onCreate(GameActivity.java:20) 
at android.app.Activity.performCreate(Activity.java:5277) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2322) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2410) 
at android.app.ActivityThread.access$800(ActivityThread.java:155) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1331) 
at android.os.Handler.dispatchMessage(Handler.java:110) 
at android.os.Looper.loop(Looper.java:193) 
at android.app.ActivityThread.main(ActivityThread.java:5395) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:515) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:837) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:653) 
at dalvik.system.NativeStart.main(Native Method) 
Caused by: java.lang.NoSuchMethodException: <init> [class android.content.Context, interface android.util.AttributeSet] 
at java.lang.Class.getConstructorOrMethod(Class.java:472) 
at java.lang.Class.getConstructor(Class.java:446) 
at android.view.LayoutInflater.createView(LayoutInflater.java:568) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696) 
at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 
at android.view.LayoutInflater.rInflate(LayoutInflater.java:758) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:312) 
at android.app.Activity.setContentView(Activity.java:1952) 
at com.example.helen.mynewgamesapper.GameActivity.onCreate(GameActivity.java:20) 
at android.app.Activity.performCreate(Activity.java:5277) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2322) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2410) 
at android.app.ActivityThread.access$800(ActivityThread.java:155) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1331) 
at android.os.Handler.dispatchMessage(Handler.java:110) 
at android.os.Looper.loop(Looper.java:193) 
at android.app.ActivityThread.main(ActivityThread.java:5395) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:515) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:837) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:653) 
at dalvik.system.NativeStart.main(Native Method)

Quelle

2016-03-26 Helen

Sie haben die Konstrukteure in SapperButton kommentiert, dass Android verwenden muss Instanzen dieser Ansicht, wenn in einem XML-Layout verwendet zu erstellen. Das sind the 2- or 3- argument constructors, über die Sie in der Fehlermeldung informiert werden. Kommentieren Sie sie, überprüfen Sie sie auf Richtigkeit und versuchen Sie es erneut.

Quelle

2016-03-26 16:47:48

Ja, es funktioniert! Vielen Dank. – Helen

Dieser Konstruktor wird aufgerufen, wenn Sie Ansichtsformular-XML aufblasen.

public SapperButton(Context context, AttributeSet attrs) { 
    super(context, attrs); 

}

Referenz: http://developer.android.com/reference/android/view/View.html#View%28android.content.Context,%20android.util.AttributeSet%29

Quelle

2016-03-26 16:49:27 Ozgur

Die Anwendung abstürzt in SetcontentView (Meine Aktivität), die meine Klasse verwendet erweitert Schaltfläche

Antwort

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