Java 在按钮的setText（）方法中使用串联值的/one正确方法是什么？

我尝试使用一个连接的值来设置按钮的文本，因为

intxp在运行时计算。
唯一有效的方法是发出警告，也许是糟糕的做法

你有没有更好的解决办法

我试过以下几种方法：


第一次进近：

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + String.valueOf(getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + (getXp()));}
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText("XP: " + (getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

private int xp = 2000;
public int getXp(){
        return xp;
    }

@Override
public void onResume() {
    super.onResume();

Button currentXp1 = findViewById(R.id.currentXp1);

currentXp1.setText(getResources().getIdentifier("praefixXP", "string", getPackageName()) + getXp());}
}

结果：

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + String.valueOf(getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + (getXp()));}
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText("XP: " + (getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

private int xp = 2000;
public int getXp(){
        return xp;
    }

@Override
public void onResume() {
    super.onResume();

Button currentXp1 = findViewById(R.id.currentXp1);

currentXp1.setText(getResources().getIdentifier("praefixXP", "string", getPackageName()) + getXp());}
}

编译，但为按钮指定一个int/numeric值


第二种方法：

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + String.valueOf(getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + (getXp()));}
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText("XP: " + (getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

private int xp = 2000;
public int getXp(){
        return xp;
    }

@Override
public void onResume() {
    super.onResume();

Button currentXp1 = findViewById(R.id.currentXp1);

currentXp1.setText(getResources().getIdentifier("praefixXP", "string", getPackageName()) + getXp());}
}

结果：

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + String.valueOf(getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + (getXp()));}
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText("XP: " + (getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

private int xp = 2000;
public int getXp(){
        return xp;
    }

@Override
public void onResume() {
    super.onResume();

Button currentXp1 = findViewById(R.id.currentXp1);

currentXp1.setText(getResources().getIdentifier("praefixXP", "string", getPackageName()) + getXp());}
}

抛出资源$NotFoundException


第三种方法：

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + String.valueOf(getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + (getXp()));}
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText("XP: " + (getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

private int xp = 2000;
public int getXp(){
        return xp;
    }

@Override
public void onResume() {
    super.onResume();

Button currentXp1 = findViewById(R.id.currentXp1);

currentXp1.setText(getResources().getIdentifier("praefixXP", "string", getPackageName()) + getXp());}
}

结果：

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + String.valueOf(getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + (getXp()));}
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText("XP: " + (getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

private int xp = 2000;
public int getXp(){
        return xp;
    }

@Override
public void onResume() {
    super.onResume();

Button currentXp1 = findViewById(R.id.currentXp1);

currentXp1.setText(getResources().getIdentifier("praefixXP", "string", getPackageName()) + getXp());}
}

工作正常，但需要注释：

@SuppressLint({"SetTextI18n"})


第四种方法：

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + String.valueOf(getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + (getXp()));}
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText("XP: " + (getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

private int xp = 2000;
public int getXp(){
        return xp;
    }

@Override
public void onResume() {
    super.onResume();

Button currentXp1 = findViewById(R.id.currentXp1);

currentXp1.setText(getResources().getIdentifier("praefixXP", "string", getPackageName()) + getXp());}
}

结果：

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + String.valueOf(getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText(R.string.praefixXP + (getXp()));}
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

    private int xp = 2000;
    public int getXp(){
            return xp;
        }

    @Override
    public void onResume() {
        super.onResume();

    Button currentXp1 = findViewById(R.id.currentXp1);

    currentXp1.setText("XP: " + (getXp())); }
}

public class selectionActivity extends AppCompatActivity implements View.OnClickListener, Serializable {

private int xp = 2000;
public int getXp(){
        return xp;
    }

@Override
public void onResume() {
    super.onResume();

Button currentXp1 = findViewById(R.id.currentXp1);

currentXp1.setText(getResources().getIdentifier("praefixXP", "string", getPackageName()) + getXp());}
}

抛出资源$NotFoundException


strings.xml：


XP:
您需要使用

   currentXp1.setText((getResources().getString(R.string.praefixXP)+getXp()));

要从字符串资源文件中获取字符串值，我们需要使用
getResources（）.getString（string_ID）
，在本例中，我只是将getXp（）的结果与字符串的值连接起来

使用currentXp1.setText（getResources（）.getString（R.string.praefixXP），getXp（））可以随意询问是否有不清楚的地方
；引发错误消息：错误：找不到适用于setText（String，int）方法TextView的方法。setText（CharSequence，BufferType）不适用（参数不匹配；int无法转换为BufferType）方法TextView。setText（int，BufferType）不适用（参数不匹配；String无法转换为int）getXp（）的返回类型是什么尝试使用currentXp1.setText（（getResources（）.getString（R.string.praefixXP）+getXp（））；太好了，现在开始工作了！非常感谢你！很高兴帮助你。