Application Fermement fermé en cours d'exécution.

Question

Lorsque j'ai essayé de lancer le code, l'application s'est arrêtée. Veuillez m'aider avec mon code. Voici le code pour lequel je veux la solution.

package gaurav.android; 

import java.util.*; 

import android.app.Activity; 
import android.graphics.Color; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 

public class EventActivity extends Activity { 
    /** Called when the activity is first created. */ 
    View colorregion; 
    int[] colorchoices = {Color.BLACK , Color.BLUE, Color.CYAN}; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     colorregion = findViewById(R.id.color_region); 
     Button clbutton = (Button)findViewById(R.id.color_button); 
     clbutton.setOnClickListener((OnClickListener) new ColorRandomizer()); 
    } 
    private void regioncolor(int color) 
    { 
     colorregion.setBackgroundColor(color); 
    } 
    private class ColorRandomizer implements onClickListener 
    { 
     public void onClick(View v) 
     { 
      Random r= new Random(); 
      int index= r.nextInt(colorchoices.length); 
      regioncolor(colorchoices[index]); 
     } 
    } 
} 

Answer 1

Modifier votre code

private class ColorRandomizer implements onClickListener 
    { 
     public void onClick(View v) 
     { 
      Random r= new Random(); 
      int index= r.nextInt(colorchoices.length); 
      regioncolor(colorchoices[index]); 
     } 
    } 

à cette

private class ColorRandomizer implements OnClickListener { 
     public void onClick(View v) { 
      Random r = new Random(); 
      int index = r.nextInt(colorchoices.length); 
      regioncolor(colorchoices[index]); 
     } 
    } 

sa non onClickListener son OnClickListener

Answer 2

package com.test; 

    import java.util.Random; 

    import android.app.Activity; 
    import android.graphics.Color; 
    import android.os.Bundle; 
    import android.view.View; 
    import android.view.View.OnClickListener; 
    import android.widget.Button; 

    public class EventActivity extends Activity 
    { 
    /** Called when the activity is first created. */ 
    View colorregion; 
    int[] colorchoices = {Color.BLACK , Color.BLUE, Color.CYAN}; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     colorregion = findViewById(R.id.color_region); 
     Button clbutton = (Button)findViewById(R.id.color_button); 
     clbutton.setOnClickListener(new ColorRandomizer()); 
    } 
    private void regioncolor(int color) 
    { 
     colorregion.setBackgroundColor(color); 
    } 
    private class ColorRandomizer implements OnClickListener 
    { 
     public void onClick(View v) 
     { 
      Random r= new Random(); 
      int index= r.nextInt(colorchoices.length); 
      regioncolor(colorchoices[index]); 
     } 
    } 

}