package com
.example
.my
application;
import android
.app.Activity;
import android
.content
.Intent;
import android
.os
.Bundle;
import android
.provider
.MediaStore;
import android
.view
.View;
import android
.widget
.Button;
import android
.widget
.ImageView;
import android
.widget
.TextView;
import androidx
.activity
.EdgeToEdge;
import androidx
.appcompat
.app.AppCompatActivity;
import androidx
.core
.graphics
.Insets;
import androidx
.core
.view
.ViewCompat;
import androidx
.core
.view
.WindowInsetsCompat;
public class MainActivity extends Activity {
@Override
protected void onCreate
(Bundle savedInstanceState
) {
super
.onCreate
(savedInstanceState
);
setContentView
(R
.layout
.activity_main
);
ImageView imageView = findViewById
(R
.id
.image
);
Button button = findViewById
(R
.id
.btn
);
button
.setOnClickListener
(v
-> openGallery
());
}
public void openGallery
() {
Intent intent = new Intent
(Intent
.ACTION_PICK, MediaStore
.Images
.Media
.EXTERNAL_CONTENT_URI
);
startActivityForResult
(intent,
1);
}
}
<?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:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="
.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="
100
dp"
android:text="
Hello World!"
app:layout_constraintTop_toBottomOf="parent"
app:layout_constraintStart_toEndOf="parent"
android:id="@+id/textView"/>
<
!-- app:layout_constraintStart_toStartOf="parent"
-->
<
!-- app:layout_constraintTop_toTopOf="parent"
-->
<ImageView
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:src="@mipmap/capture"
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ImageView>
<Button
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:text="按钮"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/btn">
</Button>
</androidx
.constraintlayout
.widget
.ConstraintLayout>
点击按钮进入图库选择后怎么使选择的图片替换为当前的ImageView
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