Java 将数据从一个活动传递到另一个活动,并设置为调用它的特定EditText字段
Activity1包含多个edittext和按钮,Activity2包含1个edittext和按钮。Activity1在单击按钮时调用Activity2。在activity2中,如果您将一个值设置为edittext,然后单击btn将该值设置为调用它的activity1字段 activity_main.xmlJava 将数据从一个活动传递到另一个活动,并设置为调用它的特定EditText字段,java,android,android-intent,Java,Android,Android Intent,Activity1包含多个edittext和按钮,Activity2包含1个edittext和按钮。Activity1在单击按钮时调用Activity2。在activity2中,如果您将一个值设置为edittext,然后单击btn将该值设置为调用它的activity1字段 activity_main.xml <?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLay
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
tools:context=".MainActivity">
<EditText
android:id="@+id/editText"
android:layout_width="271dp"
android:layout_height="46dp"
android:layout_marginStart="20dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="32dp"
android:ems="10"
android:inputType="textPersonName"
android:text="Name"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="32dp"
android:layout_marginLeft="32dp"
android:layout_marginTop="32dp"
android:text="Button"
android:onClick="onNav"
app:layout_constraintStart_toEndOf="@+id/editText"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="32dp"
android:layout_marginLeft="32dp"
android:layout_marginTop="32dp"
android:text="Button"
android:onClick="onNav"
app:layout_constraintStart_toEndOf="@+id/editText2"
app:layout_constraintTop_toBottomOf="@+id/button" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="32dp"
android:layout_marginLeft="32dp"
android:layout_marginTop="32dp"
android:text="Button"
android:onClick="onNav"
app:layout_constraintStart_toEndOf="@+id/editText3"
app:layout_constraintTop_toBottomOf="@+id/button2" />
<EditText
android:id="@+id/editText2"
android:layout_width="266dp"
android:layout_height="51dp"
android:layout_marginStart="20dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="28dp"
android:ems="10"
android:inputType="textPersonName"
android:text="Name"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/editText" />
<EditText
android:id="@+id/editText3"
android:layout_width="266dp"
android:layout_height="43dp"
android:layout_marginStart="20dp"
android:layout_marginLeft="20dp"
android:layout_marginTop="36dp"
android:ems="10"
android:inputType="textPersonName"
android:text="Name"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/editText2" />
</androidx.constraintlayout.widget.ConstraintLayout>
Activity2.java
public class Activity2 extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_2);
}
public void onNavBack(View v) {
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);
}
}
预期o/p:
如果我点击按钮,导航到activity2,通过点击btn OK,它应该将文本设置为editText。类似地,如果我单击按钮2,在单击确定后,应将文本设置为editText2。在当前活动中,创建一个新的意图:
String value="Hello world";
Intent i = new Intent(CurrentActivity.this, NewActivity.class);
i.putExtra("key",value);
startActivity(i);
然后在新活动中,检索这些值:
Bundle extras = getIntent().getExtras();
if (extras != null) {
String value = extras.getString("key");
//The key argument here must match that used in the other activity
}
那么问题是什么呢?挖一个谷歌?
String value="Hello world";
Intent i = new Intent(CurrentActivity.this, NewActivity.class);
i.putExtra("key",value);
startActivity(i);
Bundle extras = getIntent().getExtras();
if (extras != null) {
String value = extras.getString("key");
//The key argument here must match that used in the other activity
}