从 xml 文件到 ListView 的 Android 字符串数组

Question

首先感谢您的回答!我是 Android 新手，这是我的问题；

我想将字符串数组的值带到 ListView 中。

程序可以很好地使用这些代码:

private String [] fiilliste={"A","Ağlamak","Almak","B","Bulmak"};
ArrayAdapter<String> adapter;
adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, fiilliste);
vlist.setAdapter(adapter);

但我想将 xml 文件用于字符串数组。这是我的 xml 文件:

<?xml version="1.0" encoding="utf-8"?>
<resources>

     <string-array name="fi">
        <item>A</item>
      <item>Almak</item>
      <item>Anlamak</item>
      <item>Anlasmak</item>
      <item>Anlatmak</item>
      <item>Ayrilmak</item>
    </string-array>

</resources>

我只是用以下代码更改了代码，现在程序不起作用。

String [] fiilliste= getResources().getStringArray(R.array.fi);

你能帮我解决这个问题吗？谢谢!

Activity 代码:

package com.gazi.tezproje;

import android.app.ActionBar;
import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.Toast;

public class verbs extends Activity {

    public boolean onCreateOptionsMenu(Menu menu) {
        ActionBar bar=getActionBar(); 
        bar.setDisplayHomeAsUpEnabled(true);

        MenuInflater menu1 = getMenuInflater();
        menu1.inflate(R.menu.info, menu);


        return super.onCreateOptionsMenu(menu);
    }

    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.menuinfo:
            Toast.makeText(getApplicationContext(),getString(R.string.verbs), Toast.LENGTH_LONG).show();
            break; 
            case android.R.id.home:
            finish();
            break;
        }
        return false;
    }

    private ListView vlist;
    EditText ara;

    String [] fiilliste= getResources().getStringArray(R.array.fi);
    ArrayAdapter<String> adapter;

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

        vlist=(ListView)findViewById(R.id.listView1);

        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, fiilliste);

        vlist.setAdapter(adapter);
        ara = (EditText) findViewById(R.id.editText1);
        vlist.setTextFilterEnabled(true);
        ara.addTextChangedListener(new TextWatcher(){
            public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
                /* When user changed the Text */
                verbs.this.adapter.getFilter().filter(cs);   
            }

            @Override
            public void afterTextChanged(Editable arg0) {
                /*TODO Auto-generated method stub*/
            }

            @Override
            public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
                int arg3) {
                /*TODO Auto-generated method stub*/
            }
        });
    }
}

Answer 1

改成

String [] fiilliste;
ArrayAdapter<String> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.verbs);
    fiilliste = getResources().getStringArray(R.array.fi); 
    // move this in onCreate

我假设您在 strings.xml 中有字符串数组 fi。

您可能遇到了 NullPointerException。您需要 getResources() 的 Activity 上下文。所以把它移到 onCreate 里面。