activity_main.xml 文件
<?xml version="1.0" encoding="utf-8"?><Button
android:id="@+id/bt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"></Button>
…java文件
package com.example.butttoncs;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
private Button bt;
private TextView tv;
private int xx=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
tv.setText(""+xx++);
if (xx==10){
Toast.makeText(MainActivity.this, "牛逼", Toast.LENGTH_SHORT).show();
}
}
});
}
private void initView() {
bt = (Button) findViewById(R.id.bt);
tv = (TextView) findViewById(R.id.tv);
}
}