Java Android Studio中的ImageButton存在问题
我尝试在活动中创建两个ImageButton,但只能看到其中一个。有人能帮我吗Java Android Studio中的ImageButton存在问题,java,android,android-studio,Java,Android,Android Studio,我尝试在活动中创建两个ImageButton,但只能看到其中一个。有人能帮我吗 activity_ristorante.xml : ?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://sche
activity_ristorante.xml :
?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=".Ristoranti">
<ImageButton
android:id="@+id/b2"
style="@style/Widget.AppCompat.ImageButton"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_marginStart="232dp"
android:layout_marginTop="50dp"
android:layout_marginEnd="30dp"
android:visibility="visible"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageButton
android:id="@+id/b1"
style="@style/Widget.AppCompat.ImageButton"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_marginStart="30dp"
android:layout_marginTop="50dp"
android:visibility="visible"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
什么是错误?我看不到按钮,即使它在android Studio中设置为可见,你能帮我吗?谢谢只需更改setContentViewR.layout.activity\u main;设置contentviewr.layout.activity\u ristorante;或者将您的XML代码从activity_ristorante.XML复制到activity_main.XML您的setContentView使用了与您发布的不同的XML布局。非常感谢,我是java和android studio的新手,我还在学习!
public class Ristoranti extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImageButton b1 = findViewById(R.id.b1);
ImageButton b2 = findViewById(R.id.b2);
b1.setBackgroundResource(R.drawable.putia) ;
b2.setBackgroundResource(R.drawable.pos);
b1.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view) {
Uri uri = Uri.parse("https://maps.app.goo.gl/FoRGA2CbJdrV5cfT8");
Intent in = new Intent(Intent.ACTION_VIEW, uri);
startActivity(in);
}
});