3-AI--Activity间的数据传递
零、前言 打开FromActivity，通过按钮以返回结果方式打开ToActivity，同时在intent中加入数据，在ToActivity的onCreate方法中使用数据填充到TextView上。按返回按钮，将ToActivity数据传递给FromActivity，在onActivityResult方法中验证返回结果并将数据填充到TextView上。 Activity数据传递.gif 一、Java类 FromActivity.java public class FromActivity extends AppCompatActivity { private static final int DATA_CODE = 0x0001; @BindView(R.id.btn_for_result) Button mBtnForResult; @BindView(R.id.tv_result) TextView mTvResult; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.ac_from); ButterKnife.bind(this); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case DATA_CODE: if (resultCode == RESULT_OK) { String dataFormTarget = data.getStringExtra("data"); Bundle personData = data.getBundleExtra("To"); Person person = (Person) personData.get("person"); mTvResult.setText("dataFormTarget:" + dataFormTarget + "\nperson:" + person.toString()); } break; } } @OnClick({R.id.btn_for_result}) public void onViewClicked(View view) { Intent intent = new Intent(this, ToActivity.class); Bundle bundle = new Bundle(); bundle.putSerializable("person", new Person("form", 23)); intent.putExtra("from", bundle); startActivityForResult(intent, DATA_CODE); } } ToActivity.java public class ToActivity extends AppCompatActivity { @BindView(R.id.btn_send) Button mBtnSend; @BindView(R.id.tv_to) TextView mTvTo; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.ac_target); ButterKnife.bind(this); Intent intent = getIntent(); Bundle extra = intent.getBundleExtra("from"); Person from = (Person) extra.get("person"); mTvTo.setText(from.toString()); } @OnClick(R.id.btn_send) public void onViewClicked() { backWithData(); finish(); } private void backWithData() { Person jt = new Person("捷特", 24); Intent intent = new Intent(); intent.putExtra("data", "我是ToActivity的数据"); Bundle bundle = new Bundle(); bundle.putSerializable("person", jt); intent.putExtra("To", bundle); setResult(RESULT_OK, intent); } /** * 重写返回键 */ @Override public void onBackPressed() { backWithData(); super.onBackPressed(); } } Activity传递数据.png 附录 Person.java public class Person implements Serializable { private String name; private int age; public Person(String name, int age) { this.name = name; this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public String toString() { return "Person{" + "name='" + name + '\'' + ", age=" + age + '}'; } } ac_from.xml <?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"> <Button android:id="@+id/btn_for_result" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginStart="112dp" android:layout_marginTop="32dp" android:text="StartTargetForResult" android:textAllCaps="false" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"/> <TextView android:id="@+id/tv_result" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="点击按钮 获取返回结果" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"/> </android.support.constraint.ConstraintLayout> ac_to.xml <?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"> <Button android:id="@+id/btn_send" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="30dp" android:layout_marginStart="30dp" android:layout_marginTop="24dp" android:text="返回给上一个Activity结果" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"/> <TextView android:id="@+id/tv_to" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="结果" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"/> </android.support.constraint.ConstraintLayout> 后记、 1.声明： [1]本文由张风捷特烈原创,转载请注明 [2]欢迎广大编程爱好者共同交流 [3]个人能力有限，如有不正之处欢迎大家批评指证，必定虚心改正 [4]你的喜欢与支持将是我最大的动力 2.连接传送门： 更多安卓技术欢迎访问:安卓技术栈 我的github地址：欢迎star 简书首发，腾讯云+社区同步更新张风捷特烈个人网站，编程笔记请访问：http://www.toly1994.com 3.联系我 QQ:1981462002 邮箱：1981462002@qq.com 微信：zdl1994328 4.欢迎关注我的微信公众号，最新精彩文章，及时送达： 公众号.jpg
