安卓学习之控件

1)按钮的点击事件
package com.example.swkj.testproject;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

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

    pushBtn = (Button)findViewById(R.id.btn1);

    pushBtn.setOnClickListener(new View.OnClickListener(){

        @Override
        public void onClick(View v){
            Intent intent = new Intent(MainActivity.this,Main2Activity.class);
            startActivity(intent);
        }
    });
}

}