Android studio projects / 9labka

Code:

package com.example.myapplication; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; public class MainActivity extends AppCompatActivity { TextView tvOut; Button btnOk; Button btnCancel; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tvOut = (TextView) findViewById(R.id.tvOut); btnOk = (Button) findViewById(R.id.btnOk); btnCancel = (Button) findViewById(R.id.btnCancel); View.OnClickListener oclBtnOk = new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub tvOut.setText("Нажата кнопка ОК"); } }; btnOk.setOnClickListener(oclBtnOk); View.OnClickListener oclBtnCancel = new View.OnClickListener() { @Override public void onClick(View v) { // Меняем текст в TextView (tvOut) tvOut.setText("Нажата кнопка Cancel"); } }; btnCancel.setOnClickListener(oclBtnCancel); } }

XML:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal"> <LinearLayout android:id="@+id/linearLayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_margin="30dp" android:orientation="vertical"> <TextView android:id="@+id/tvOut" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:layout_marginBottom="50dp" android:text="TextView"> </TextView> <Button android:id="@+id/btnOk" android:layout_width="100dp" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:text="OK"> </Button> <Button android:id="@+id/btnCancel" android:layout_width="100dp" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:text="Cancel"> </Button> </LinearLayout> </LinearLayout>