Android实现Activity之间通信的方法

public class MainActivity extends Activity {  @Override  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    Button btnOpen=(Button)this.findViewById(R.id.btnOpen);    btnOpen.setOnClickListener(new View.OnClickListener(){      public void onClick(View v) {        //新建一个显式意图，第一个参数为当前Activity类对象，第二个参数为你要打开的Activity类        startActivity(new Intent(MainActivity.this, OtherActivity.class));      }    });  }}

package com.ljq.activitys;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.Button;public class MainActivity extends Activity {  @Override  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    Button btnOpen=(Button)this.findViewById(R.id.btnOpen);    btnOpen.setOnClickListener(new View.OnClickListener(){      public void onClick(View v) {        //第一种：打开新的Activity，不传递参数        //新建一个显式意图，第一个参数为当前Activity类对象，第二个参数为你要打开的Activity类        //startActivity(new Intent(MainActivity.this, OtherActivity.class));        //第二种：打开新的Activity，并传递若干个参数给它        Intent intent=new Intent(MainActivity.this, OtherActivity.class);        //Bundle类用作携带数据        Bundle bundle=new Bundle();        bundle.putString("name", "linjiqin");        bundle.putInt("age", 24);        //附带上额外的数据        intent.putExtras(bundle);        startActivity(intent);      }    });  }}

package com.ljq.activitys;import android.app.Activity;import android.os.Bundle;import android.util.Log;public class OtherActivity extends Activity {  private final static String TAG="OtherActivity";  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.other);    //在新的Activity中接收前面Activity传递过来的参数    Bundle bundle=this.getIntent().getExtras();    String name=bundle.getString("name");    Integer age=bundle.getInt("age");    Log.i(TAG, name+" : "+age);  }}