Android生命周期

Intent intent = new Intent(MainActivity.this,NextActivity.class);
startActivity(intent);

Intent intent = new Intent(MainActivity.this,NextActivity.class);
intent.putExtra("name","YinTing");
Bundle bundle = new Bundle();
bundle.putInt("age",22);
bundle.putChar("bood",'b');
intent.putExtra("bundle",bundle);
startActivity(intent);

Intent intent = new Intent(MainActivity.this,NextActivity.class);
intent.putExtra("name","YinTing");
Bundle bundle = new Bundle();
bundle.putInt("age",22);
bundle.putChar("bood",'b');
intent.putExtra("bundle",bundle);
MainActivity.this.startActivityForResult(intent,1);

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==1&&resultCode==1001){
String name= data.getStringExtra("name");
Toast.makeText(MainActivity.this,"---->"+name,Toast.LENGTH_LONG).show();
}

}
NextActivity结束时带数据返回。

Intent intent=new Intent();
intent.putExtra("name","YangYi");
NextActivity.this.setResult(1001,intent);
NextActivity.this.finish();