从AActivity向BActivity跳转后，关闭BActivity并向AActivity回调一些数据： 建立AActivity.java文件： 1 public class AActivity extends AppCompatActivity { 2 private Button btnJump; 3 @Override 4 protected void onCreate(Bundle savedInstanceState) { 5
从AActivity.java向BActivity.java传递数据： 建立AActivity.java文件建立bundle： 1 public class AActivity extends AppCompatActivity { 2 private Button btnJump; 3 @Override 4 protected void onCreate(Bundle savedInstanceState) { 5 super.onCre
