求大神解答unfortunately **has stopped

Question

package com.example.lifeview;

import java.util.List;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

public class FruitAdapter extends ArrayAdapter{

private int resourceId;

private Fruit getItem(int position) {
// TODO Auto-generated method stub
return null;
}

private Context getContext() {
// TODO Auto-generated method stub
return null;
}

public FruitAdapter(Context context,int textViewResourceId,List<Fruit> objects){
    super();
    resourceId=textViewResourceId;
    }

@Override
public View getView(int position,View convertView,ViewGroup parent){
    Fruit fruit=getItem(position);
    View view =LayoutInflater.from(getContext()).inflate(resourceId,null);
    ImageView fruitImage=(ImageView)view.findViewById(R.id.fruit_image);
    TextView fruitName=(TextView)view.findViewById(R.id.fruit_name);
    fruitImage.setImageResource(fruit.getImageId());
    fruitName.setText(fruit.getName());
    return view;
}

}

Answer 1

主程序
package com.example.lifeview;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;

public class MainActivity extends Activity {
private List fruitList=new ArrayList();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initFruits();
FruitAdapter adapter=new FruitAdapter(MainActivity.this ,R.layout.fruit_item,fruitList);

    ListView listView=(ListView)findViewById(R.id.list_view);
    listView.setAdapter( (ListAdapter) adapter);

}
private void initFruits(){
    Fruit apple=new Fruit("Apple",R.drawable.apple_pic);
    fruitList.add(apple);
    Fruit banana=new Fruit("Banana",R.drawable.banana_pic);
    fruitList.add(banana);
    Fruit orange=new Fruit("Orange",R.drawable.orange_pic);
    fruitList.add(orange);
    Fruit watermelon=new Fruit("Watermelon",R.drawable.watermelon_pic);
    fruitList.add(watermelon);
    Fruit pear=new Fruit("Pear",R.drawable.pear_pic);
    fruitList.add(pear);
    Fruit grape=new Fruit("Grape",R.drawable.grape_pic);
    fruitList.add(grape);
    Fruit pineapple=new Fruit("Pineapple",R.drawable.pineapple_pic);
    fruitList.add(pineapple);
    Fruit strawberrt=new Fruit("Strawberrt",R.drawable.strawberrt_pic);
    fruitList.add(strawberrt);
    Fruit cherry=new Fruit("Cherry",R.drawable.cherry_pic);
    fruitList.add(cherry);
    Fruit mango=new Fruit("Mango",R.drawable.mango_pic);
    fruitList.add(mango);



}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

}