[英]Login and Registration form in Android studio Unable to resolve class
[英]Android Studio unable to resolve method in class
我正在尝试制作一个基本的connect 3应用程序,作为课程挑战的一部分。 我遇到的问题是,我无法访问Players
类中的方法来设置哪个玩家按下了哪些按钮: Cannot resolve method 'noughtsPlayer'
。
我在onCreate
方法上创建了Players
实例,并在脚本顶部声明了它。 该实例本身可以识别,但由于某些原因,所包含的方法noughtsPlayer
和crossesPlayer
无法crossesPlayer
。
MainActivity.java
package com.example.richardcurteis.connect3;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TableLayout;
import android.widget.TableRow;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
public boolean noughtsTurn;
ArrayList board;
String players;
public void receiveClick(View view) {
String buttonPressed = (String) view.getTag();
board.remove(buttonPressed);
if (view instanceof Button) {
Button B = (Button) view;
B.setText(noughtsTurn ? players.noughtsPlayer() : players.crossesPlayer());
}
}
class Players {
public String noughtsPlayer() { return "O"; }
public String crossesPlayer() { return "X"; }
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
boolean noughtsTurn = true;
board = new ArrayList();
for (int x = 0; x < getBoardSize(); x++) {
String y = String.valueOf(x);
board.add(y);
}
Players players = new Players();
}
public int getBoardSize() {
int buttonCount = 0;
TableLayout tableLayout = (TableLayout) findViewById(R.id.tableLayout);
for (int rowIndex = 0; rowIndex < tableLayout.getChildCount(); rowIndex++) {
View tableLayoutChild = tableLayout.getChildAt(rowIndex);
if (tableLayoutChild instanceof TableRow) {
for (int i = 0; i < ((ViewGroup) tableLayoutChild).getChildCount(); i++) {
View view = ((ViewGroup) tableLayoutChild).getChildAt(i);
if (view instanceof Button) {
buttonCount++;
}
}
}
}
return buttonCount;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
您具有全局变量String players
和局部变量Players players
。 这是问题。 而且String类没有这些方法。 要解决此问题,请更改String players;
给Players players;
和Players players = new Players();
给players = new Players();
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