调用系统浏览器访问

package com.example.deemo;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;

public class MainActivity extends Activity {
    
    private String url="http://www.bilibili.com";//地址
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        Uri uri = Uri.parse(url);//链接地址
        Intent intent = new Intent(Intent.ACTION_VIEW,uri);
        startActivity(intent);
    }

}

package com.example.deemo;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity{
    
    private String url="http://www.bilibili.com";//地址
    private Button bt1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        bt1=(Button) findViewById(R.id.button1);
        bt1.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View arg0) {
                Uri uri = Uri.parse(url);//链接地址
                Intent intent = new Intent(Intent.ACTION_VIEW,uri);//上文文件和下文目标
                startActivity(intent);//进行转跳
            }
        });        
        }
}