我正在开发一个Android应用程序,我想通过按一个按钮来增加一个对话框(我已经这样做了),但是一个特定的按钮不起作用,我也不知道为什么。
我的代码:
public class SearchUser extends AppCompatActivity{
private static final String TAG = "SearchUser";
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button b = (Button) findViewById(R.id.btnSearchUser);
b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
AlertDialog.Builder mBuilder = new AlertDialog.Builder(SearchUser.this);
View mView = getLayoutInflater().inflate(R.layout.searchpopup, null);
mBuilder.setView(mView);
AlertDialog dialog = mBuilder.create();
btnSearch.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
});
}
});
dialog.show();
}
});
}
布局XML文件:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:mapbox="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">
<Button
android:id="@+id/btnUser"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="@string/user"
mapbox:layout_constraintBottom_toBottomOf="parent"
mapbox:layout_constraintEnd_toEndOf="@+id/mapView"
mapbox:layout_constraintHorizontal_bias="0.0"
mapbox:layout_constraintStart_toStartOf="parent"
mapbox:layout_constraintTop_toTopOf="@+id/mapView"
mapbox:layout_constraintVertical_bias="0.0" />
<Button
android:id="@+id/btnSearchUser"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="@string/search_user"
mapbox:layout_constraintBottom_toBottomOf="parent"
mapbox:layout_constraintEnd_toEndOf="@+id/mapView"
mapbox:layout_constraintHorizontal_bias="0.0"
mapbox:layout_constraintStart_toStartOf="parent"
mapbox:layout_constraintTop_toTopOf="@+id/mapView"
mapbox:layout_constraintVertical_bias="0.129" />
<Button
android:id="@+id/logoutButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="@string/log_out"
mapbox:layout_constraintBottom_toBottomOf="parent"
mapbox:layout_constraintEnd_toEndOf="@+id/mapView"
mapbox:layout_constraintHorizontal_bias="1.0"
mapbox:layout_constraintStart_toStartOf="@+id/mapView"
mapbox:layout_constraintTop_toTopOf="parent"
mapbox:layout_constraintVertical_bias="0.0" />
<com.mapbox.mapboxsdk.maps.MapView
android:id="@+id/mapView"
android:layout_width="match_parent"
android:layout_height="match_parent"
mapbox:layout_constraintBottom_toBottomOf="parent"
mapbox:layout_constraintEnd_toEndOf="parent"
mapbox:layout_constraintStart_toStartOf="parent"
mapbox:layout_constraintTop_toTopOf="parent"
mapbox:mapbox_cameraTargetLat="-34.6131500"
mapbox:mapbox_cameraTargetLng="-58.3772300"
mapbox:mapbox_cameraZoom="12"
mapbox:mapbox_styleUrl="mapbox://styles/mapbox/streets-v10">
</com.mapbox.mapboxsdk.maps.MapView>
<Button
android:id="@+id/startButton"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="24dp"
android:layout_marginEnd="24dp"
android:layout_marginStart="24dp"
android:enabled="true"
android:text="@string/crear_fiesta"
android:textColor="@color/mapboxGrayLight"
mapbox:layout_constraintBottom_toBottomOf="parent"
mapbox:layout_constraintEnd_toEndOf="parent"
mapbox:layout_constraintStart_toStartOf="parent" />
我尝试过在onClick方法中放入一条祝酒消息,但是什么也没有发生,所以我想它只是没有输入。
有人知道为什么吗?谢谢你的回答:D
答案 0 :(得分:0)
您要覆盖错误的onCreate()
,将其替换为:
protected void onCreate(@Nullable Bundle savedInstanceState)
编辑:您确定应该在类SearchUser
中夸大此xml吗?
是否有像xml状态一样的类MainActivity
?
答案 1 :(得分:0)
将btnSearchUser
按钮放置在XML中的MapView
下方。
您还用MapView
配置了match_parent
,这不适用于约束布局父级。也将MapView
的高度和宽度设置为0dp。