Question

我正在尝试创建一个程序，该程序将用户文本输入并在textview中显示，同时根据已检查的单选按钮和/或复选框进行格式化。

这是mainactivity.java的完整代码

package com.example.lab3_lefelhocz;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.*;
import android.graphics.Color;

public class MainActivity extends Activity {
TextView messageTextView;
EditText inputEditText;
@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.activity_main, menu);
    return true;
}

public void onRadioButtonClicked(View view) {
    // Is the button now checked?
    boolean checked = ((RadioButton) view).isChecked();

    // Check which radio button was clicked
    switch(view.getId()) {
        case R.id.radioBlack:
            if (checked)
                // Text is black.
                messageTextView.setTextColor(Color.BLACK);
            break;
        case R.id.radioBlue:
            if (checked)
                // Text is blue.
                messageTextView.setTextColor(Color.BLUE);
            break;
        case R.id.radioRed:
            if(checked)
                // Text is red.
                messageTextView.setTextColor(Color.RED);
                break;
}
}
public void inputEditText(View view) {        
    if (inputEditText.getText().toString().equals("")) {
         String editTextValue =   inputEditText.getText().toString();
           messageTextView.setText(editTextValue);
    } else {
         inputEditText.setText("");
         messageTextView.setText("");
}
}
    }

Answer 1

我猜你试图通过使用XML中的onClick属性来捕获EditText的点击次数。我不认为这适用于你要做的事情。您希望查找按键而不是点击次数。尝试在您的oncreate中的EditText上放置一个监听器。如下所示。

inputEditText.setOnEditorActionListener(new OnEditorActionListener() {
    @Override
    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
        if (actionId == EditorInfo.IME_ACTION_DONE) {
            inputEditText(v);
            return true;
        }
        return false;
    }
});

在按钮单击时将文本从EditText发送到TextView，如果选中radiobutton /复选框，则添加格式

1 个答案: