package com.example.pengtuanyuan.openweb;

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

public class MainActivity extends AppCompatActivity {

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

        final Button button=(Button)findViewById(R.id.button1);
        button.setOnClickListener(new MyOnclickListener());
    }

    class MyOnclickListener implements View.OnClickListener{
        @Override
        public void onClick(View view) {
            openweb();

        }
    }

    private void openweb() {
        Intent intent=new Intent();
        intent.setAction(Intent.ACTION_VIEW);
        intent.setData(Uri.parse("https://www.hao123.com"));
        startActivity(intent);
    }
}
-----------------------------------------------

package com.example.pengtuanyuan.openweb;

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

public class MainActivity extends AppCompatActivity {

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

        final Button button=(Button)findViewById(R.id.button1);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String number= button.getText().toString().trim();

                Intent intent=new Intent();
                intent.setAction(Intent.ACTION_VIEW);
                intent.setData(Uri.parse("https://www.hao123.com"));
                startActivity(intent);

            }
        });
    }
}