安卓Intent

//消息弹出    
Toast.makeText(FirstActivity.this, "加载中", Toast.LENGTH_SHORT).show();
//页面跳转 SecondActivity须和xml中一致
Intent intent = new Intent("SecondActivity");
Intent intent = new Intent(FirstActivity.this, SecondActivity.class);
//携带数据
String data = "欢迎来到Plan B";
intent.putExtra("key1",data);
//隐式启动
intent.addCategory("SecondActivity2");
Intent intent = new Intent(Intent.ACTION_VIEW);
//跳转网站
intent.setData(Uri.parse("http://www.baidu.com"));
//拨打电话
intent.setData(Uri.parse("tel:10086"));
startActivity(intent);