Activity之间的跳转以及交互

第一个Activity

package com.smartdot.activity;


import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;


public class MainActivity extends Activity {


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


public void onClick(View v) {


Intent intent = new Intent();
// 明确指定显示组件的Intent则为显式Intent
// Intent intent = new Intent(this,OtherActivity.class);//第一种
// intent.setClass(this, OtherActivity.class);//第二种
// intent.setClassName(this,
// "com.smartdot.activity.OtherActivity");//第三种
// intent.setClass(getApplicationContext(), OtherActivity.class);//第四种
intent.setClassName("com.smartdot.activity",
"com.smartdot.activity.OtherActivity");// 第五种
intent.putExtra("age", new Integer(29));
intent.putExtra("name", "王光");


Bundle bundle = new Bundle();
bundle.putString("company", "smartdot");
intent.putExtras(bundle);
startActivity(intent);// 正常跳转
}


public void onClick2(View v) {


Intent intent = new Intent();
// 通过Intent传递数据参数
intent.setClassName("com.smartdot.activity",
"com.smartdot.activity.OtherActivity");// 第五种
intent.putExtra("age", new Integer(29));
intent.putExtra("name", "王光");
// 通过Bundle传递数据参数
Bundle bundle = new Bundle();
bundle.putString("company", "smartdot");
intent.putExtras(bundle);
startActivityForResult(intent, 100);// 带请求码的跳转


}


/**
* 当下一个Activity关闭后，系统会自动调用此方法
*/


@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == 100) {
TextView tv_view = (TextView) findViewById(R.id.tv_res_value);
tv_view.setText(data.getStringExtra("result"));
}


}


}