시험대비

에디트 텍스트와 버튼의 온클릭 이벤트를 이용해서 버튼을 클릭하면 에디트 텍스트의 텍스트가 버튼에 토스트 메세지로 나오는 코드

 

    <EditText
        android:id="@+id/edit1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="텍스트 입력"
        android:textAlignment="center"
        android:inputType="text"/>

    <Button
        android:id="@+id/btn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="20dp"
        android:text="텍스트 보이기"/>

EditText editText = findViewById(R.id.edit1);
        Button btn = findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String str = editText.getText().toString();
                Toast.makeText(getBaseContext(),str,Toast.LENGTH_LONG).show();
            }
        });

 

 

좌표값 받아오는 코드

 

package com.example.AAP;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;

class MyView extends View {
    int key;
    String str;
    int x,y;

    public MyView(Context context) {
        super(context);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event){
        x = (int) event.getX(0);
        y = (int) event.getY(0);
        invalidate();
        return super.onTouchEvent(event);
    }

    @Override
    protected void onDraw(Canvas canvas){
        Paint paint = new Paint();
        paint.setTextSize(50);
        canvas.drawCircle(x,y,30,paint);
        canvas.drawText("(" + x + ", " + y + ") 2019026380 이찬호", x, y + 100, paint);
    }
}

public class MainActivity extends AppCompatActivity{
    @Override
    public void onCreate(Bundle savedInstanceState){

        super.onCreate(savedInstanceState);

        MyView w = new MyView(this);
        setContentView(w);
    }
}