Question

所以我正在创建一个将RGB颜色转换为十六进制（例如#FFFFFF）的应用程序。我有三个红色，绿色和蓝色的编辑文本。当我输入每个编辑文本的值（如255,255,255）并单击该按钮时，RGB值将转换为十六进制，并将显示在textview中。有人帮我计算这里是我的代码。

public class MainActivity extends Activity {

    public String str = "";

    int i, num, numtemp;
    EditText showRed, showGreen, showBlue;
    String displayStr = "";
    Button zero, one, two, three, four, five, six, seven, eight, nine, clear, convert;

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

        this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);

        showRed = (EditText) findViewById(R.id.red);
        showGreen = (EditText) findViewById(R.id.green);
        showBlue = (EditText) findViewById(R.id.blue);

        clear = (Button) findViewById(R.id.clear);
        convert = (Button) findViewById(R.id.convert);

        convert.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                //Convertion Computaion here HELP!!!!!!!!!
            }
        });

        clear.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {

                str = "";
                num = 0;
                numtemp = 0;

                showRed.setText("");
                showRed.requestFocus();
                showGreen.setText("");
                showBlue.setText("");
                displayStr = "";
            }
        });
    }

    public void btn1Clicked(View v) {
        insert(1);
    }

    public void btn2Clicked(View v) {
        insert(2);
    }

    public void btn3Clicked(View v) {
        insert(3);
    }

    public void btn4Clicked(View v) {
        insert(4);
    }

    public void btn5Clicked(View v) {
        insert(5);
    }

    public void btn6Clicked(View v) {
        insert(6);
    }

    public void btn7Clicked(View v) {
        insert(7);
    }

    public void btn8Clicked(View v) {
        insert(8);
    }

    public void btn9Clicked(View v) {
        insert(9);
    }

    public void btn0Clicked(View v) {
        insert(0);
    }

    private void insert(int j) {
        // TODO Auto-generated method stub

        if (showRed.hasFocus()) {
            str = str + Integer.toString(j);
            num = Integer.valueOf(str).intValue();
            displayStr += Integer.toString(j);

            showRed.setText(displayStr);

            if ((showRed.length() == 3)) {
                displayStr = "";
                showGreen.requestFocus();
            }
        } else if (showGreen.hasFocus()) {

            str = str + Integer.toString(j);
            num = Integer.valueOf(str).intValue();
            displayStr += Integer.toString(j);

            showGreen.setText(displayStr);

            if ((showGreen.length() == 3)) {
                displayStr = "";
                showBlue.requestFocus();
            }
        } else if (showBlue.hasFocus()) {
            str = str + Integer.toString(j);
            num = Integer.valueOf(str).intValue();
            displayStr += Integer.toString(j);

            showBlue.setText(displayStr);

            if ((showBlue.length() == 3)) {
                displayStr = "";
                showBlue.clearFocus();
            }
        }
    }
}

Answer 1

只需将红色，绿色，蓝色3种颜色的数组传递给此功能

  int[] color={200,170,100};
  btn.setBackgroundColor(getHexColor(color));


  public static int getHexColor(int[] color) {
    return android.graphics.Color.rgb(color[0], color[1], color[2]);
 }

以编程方式将RGB转换为HEX - Android

1 个答案: