java - 无法解决方法 "setMultichoiceItem"错误

Question

我正在从某本书中学习 Android，但在 .setMultichoiceItem block 上不断出现错误:无法解析方法 .setMultichoiceItems。 我检查了很多次，我的代码都是区分大小写的，没有拼写错误的单词。

import android.app.AlertDialog;
import android.app.Dialog;

import android.content.DialogInterface;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import android.app.Activity;


public class MainActivity extends ActionBarActivity {

    CharSequence[] items = {"Google","Safari","Yahoo"};
    Boolean[] itemChecked = new Boolean[items.length];
    Button btn ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn = (Button) findViewById(R.id.button);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog(0);


            }
        });
    }

    protected Dialog onCreateDialog(int i) {
        switch (i) {
            case 0:
                return new AlertDialog.Builder(this)

                        .setTitle("Test of Dialog")
                        .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                Toast.makeText(getApplication(), "OK Clicked !", Toast.LENGTH_LONG).show();
                            }
                        })
                        .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                Toast.makeText(getApplicationContext(), "Cancel Clicked !", Toast.LENGTH_LONG).show();
                            }
                        })

                            .setMultiChoiceItems(items, itemChecked,
                                    new DialogInterface.OnMultiChoiceClickListener() {
                                        @Override
                                        public void onClick(DialogInterface dialog, int which, boolean isChecked) {
      Toast.makeText(getApplicationContext(), items[which] + (isChecked ? " checked!" : " unchecked!"), Toast.LENGTH_SHORT).show();

                                        }

                                    }).create();
        }
        return null;
    }

}

Logcat 错误:无法解析方法 'setMultiChoiceItems(java.lang.CharSequence[], java.lang.Boolean[], android.content.DialogInterface.OnMultiChoiceClickListener)'

任何帮助都会很棒。

谢谢

Answer 1

试试这个，

改变这一行
Boolean[] itemChecked = new Boolean[items.length];
到

boolean[] itemChecked = new boolean[items.length];

因为它的第二个参数接受的是boolean[]，而不是Boolean[]对象

setMultiChoiceItems(CharSequence[] items, boolean[] checkedItems, DialogInterface.OnMultiChoiceClickListener listener)