组件间显示和隐式通信

package com.example.cie.zujiantongxin1;

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 {
    Button mButtonExplicit, mButtonimplicit;

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

        mButtonExplicit = (Button)findViewById(R.id.button);
        mButtonExplicit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, NewActivity.class);
                startActivity(intent);
            }
        });

        mButtonimplicit = (Button)findViewById(R.id.button2);
        mButtonimplicit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.baidu.com"));
                startActivity(intent);
            }
        });
    }
}