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
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转载于:https://www.cnblogs.com/toly-top/p/9781951.html
