android意图-intent

android意图intent使用：

1、不带参数跳转：

Intent intent = new Intent(Activity1.this,Activity2.class);
startActivity(intent);

2、带参数跳转：

Intent intent = new Intent(Activity1.this,Activity2.class);
Bundle bundle = new Bundle();
bundle.putString("KeyName","从Activity1传过来的值-Bundle");
intent.putExtras(bundle);
startActivity(intent);

Intent intent = new Intent(Activity1.this,Activity2.class);
intent.putExtra("KeyName","从Activity1传过来的值-Intent.putExtras");
startActivity(intent);目标Activity（以上代码Activity2）

Bundle bundle = getIntent().getExtras();
String str = bundle.getString("KeyName");