Android按钮Onclick

import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button mButton;

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

        mButton = findViewById(R.id.button);
        mButton.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        // 在这里执行按钮点击事件
        Toast.makeText(this, "按钮被点击了！", Toast.LENGTH_SHORT).show();
    }
}