L'activité se bloque après un clic sur le bouton

Question

J'ai actuellement cette activité dans et android mais lorsque le bouton est cliqué, l'application se bloque. Je ne peux pas trouver ce qui est faux.

public class SearchActivity extends Activity implements OnClickListener{ 

private ListView recipes; 
Intent intent; 
Button button; 
EditText input; 

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    setContentView(R.layout.searchlist); 

    button = (Button)findViewById(R.id.submit); 
    input = (EditText)findViewById(R.id.recipeName); 

    //recipes = (ListView)findViewById(R.id.recipes); 
    //recipes.setAdapter(new ArrayAdapter<String> (this, R.layout.main, getResources().getStringArray(R.array.BaconSandwich))); 
    button.setOnClickListener(this); 
} 

public void onClick(View clicked) { 
    if(clicked.getId() == R.id.submit) { 
     //recipes = (ListView)findViewById(R.array.recipes); 
     String value = input.getText().toString(); 
     Toast.makeText(this, value, Toast.LENGTH_SHORT).show(); 
     Intent i = new Intent(this, RecipeMethodActivity.class); 
     SearchActivity.this.startActivity(i); 
    } 
} 

} 

L'activité se situe dans le manifeste Android et l'activité suivante est vide Le message de chat journal que je reçois est:

Erreur dans RecipeMethodActivity onCreate().

Mon RecipeMethodActivity est:

package com.finalyearproject.cookmefood; 

import android.app.ListActivity; 
import android.os.Bundle; 

public class RecipeMethodActivity extends ListActivity { 

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    setContentView(R.layout.main); 

} 

}

Answer 1

---

i vérifié votre code ..

voir ci-dessous

 

public class DemoActivity extends Activity implements OnClickListener{ 

private Button button; 

private EditText input; 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     button = (Button)findViewById(R.id.submit); 
     input = (EditText)findViewById(R.id.recipeName); 

     button.setOnClickListener(this); 
    } 

    @Override 
    public void onClick(View v) { 
     // TODO Auto-generated method stub 
     if(v.getId() == R.id.submit) { 
      //recipes = (ListView)findViewById(R.array.recipes); 
      String value = input.getText().toString(); 
      Toast.makeText(this, value, Toast.LENGTH_SHORT).show(); 
      Intent i = new Intent(this, RecipeMethodActivity.class); 
      DemoActivity.this.startActivity(i); 
     } 
    } 
} 

main.xml

<TextView 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello" /> 
<EditText 
    android:id="@+id/recipeName" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" > 
    <requestFocus /> 
</EditText> 
<Button 
    android:id="@+id/submit" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Button" /> 

RecipeMethodActivity

package com.Demo;

import android.app.ListActivity; import android.os.Bundle;

public class RecipeMethodActivity extends ListActivity {

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.new_layout); 

} 

}

new_layout.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/linearLayout1" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" > 

    <ListView 
     android:id="@+id/@android:list" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_weight="1" > 
    </ListView> 

</LinearLayout> 

manifest file:

<uses-sdk android:minSdkVersion="3" /> 

<application 
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" > 
    <activity 
     android:label="@string/app_name" 
     android:name=".DemoActivity" > 
     <intent-filter > 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
    <activity android:name=".RecipeMethodActivity"></activity> 
</application>