Question

package com.example.tictactoemain;

import com.example.tictactoelib.GameActivity;
import com.example.tictactoelib.GameView.State;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

import android.content.Intent;
import android.view.View;
import android.view.View.OnClickListener;

import com.example.tictactoelib.GameActivity;

public class MainActivity extends Activity {

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

    @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;
    }

    private void startGame(boolean startWithHuman) {
        Intent i = new Intent(this, GameActivity.class);
        i.putExtra(GameActivity.EXTRA_START_PLAYER, startWithHuman ? State.PLAYER1.getValue() : State.PLAYER2.getValue());
        startActivity(i);
    }

}

GameActivity：

package com.example.tictactoelib;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

import com.example.tictactoelib.GameView.State;

public class GameActivity extends Activity {

    public static final String EXTRA_START_PLAYER = 
            "com.example.android.tictactoelib.GameActivity.EXTRA_START_PLAYER";


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

    @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;
    }

}

在MainActivity内部我收到错误：

EXTRA_START_PLAYER cannot be resolved or is not a field.

主项目将tictactoelib引用为带有绿色复选框的库。 tictactoelib也是作为图书馆项目创建的。尽管EXTRA_START_PLAYER被定义为公共静态最终字符串，但主项目似乎没有看到它。我正在拼凑TicTacToe SDK android-17项目，所以我试图解决错误，虽然我还不知道问题出在哪里。

我也想知道：="com.example.android.tictactoelib.GameActivity.EXTRA_START_PLAYER";

的确切含义

提前致谢...

Answer 1

使用

private void startGame(boolean startWithHuman) {
        Intent i = new Intent(this, GameActivity.class);
        i.putExtra("com.example.android.tictactoelib.GameActivity.EXTRA_START_PLAYER", startWithHuman ? State.PLAYER1.getValue() : State.PLAYER2.getValue());
        startActivity(i);
    }

相反，如果您只在一个活动中使用它

EXTRA_START_PLAYER无法解析或不是字段

1 个答案: