Question

Okey所以我创建了一些布尔值，根据它们我想设置一个按钮的颜色。所以我要说我有

boolean test1 = true;
boolean test2 = false;

True为绿色，false为红色。现在我希望我的程序根据布尔值将颜色设置为按钮。

package com.example.kamil.tmpsadmin;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
 String  button1nazwa = "Kamil", button1register = "SJZ-RG78",
         button2nazwa = "Daniel", button2register = "SJZ-7782",
         button3nazwa = "Kajetan", button3register = "SJZ-6669",
         button4nazwa = "Szymon", button4register = "SJZ-GRA3",
         button5nazwa = "Bartek", button5register = "SJZ-MET2",
         button6nazwa = "Paweeł", button6register = "SJZ-KOZAK";
 Boolean button1dostepnosc = true, button2dostepnosc = true, button3dostepnosc = false, button4dostepnosc = false, button5dostepnosc = false, button6dostepnosc = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    TextView textView = (TextView) findViewById(R.id.textView);
    textView.setText(button1nazwa + "\n" + button1register + "\n");
    TextView textView2 = (TextView) findViewById(R.id.textView2);
    textView2.setText(button2nazwa + "\n" + button2register + "\n");
    TextView textView3 = (TextView) findViewById(R.id.textView3);
    textView3.setText(button3nazwa + "\n" + button3register + "\n");
    TextView textView4 = (TextView) findViewById(R.id.textView4);
    textView4.setText(button4nazwa + "\n" + button4register + "\n");
    TextView textView5 = (TextView) findViewById(R.id.textView5);
    textView5.setText(button5nazwa + "\n" + button5register + "\n");
    TextView textView6 = (TextView) findViewById(R.id.textView6);
    textView6.setText(button6nazwa + "\n" + button6register + "\n");
    Button button = (Button) findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener(){
        public void onClick(View v){
            startActivity(new Intent(MainActivity.this, Zmiana.class));
        }
    });
}

Answer 1

我认为你可以用if-then-else语句来做到这一点。

if(test1) {
    //set button1 color to green
}
else {
   //set button1 color to red
}

if(test2) {
   //set button2 color to green
}
else {
   //set button2 color to red
}

这将是一个带阵列的解决方案。请注意，colorBool中的所有值均默认为false。

int count = 10; //leads to ten buttons
boolean[] colorBool = new boolean[count];
Button[] buttons = new Button[count];

for(int i = 0; i < colorBool.length; i++) {
    if(colorBool[i]) {
        buttons[i].setBackgroundColor(Color.GREEN);
    }
    else {
        buttons[i].setBackgroundColor(Color.RED);
    }
}

Answer 2

你只需要检查一下：

if(test1 == true)
{
    button.setBackgroundColor(Color.GREEN);
}
if(test2 == true)
{
    button.setBackgroundColor(Color.RED);
}

根据布尔值更改按钮的颜色

2 个答案: