Android ArrayAdapter未从Firebase读取数据(我的应用程序关闭)
我正在用Firebase制作一个android应用程序,在数据库中写入数据是可行的,但在读取我在数据库中写入的数据时,我被卡住了(我对ArrayAdapter、Firebase没有太多经验,甚至对android也没有太多经验) 当我从手机上打开这个包含Firebase读取的片段时(注意:写入数据在另一个片段中),我的应用程序关闭。不确定是否与此有关 -如何实现和使用ArrayAdapter -如何实现Firebase read -或者我已经更新到Android studio(最新版本SDK 26.0.0) -或者其他我看不到的原因 我有几个错误: -我得到了下面的错误,我用下面的代码修复了它(configurations.all…)。这是我从Firebase添加依赖项时遇到的错误Android ArrayAdapter未从Firebase读取数据(我的应用程序关闭),android,firebase,firebase-realtime-database,android-arrayadapter,Android,Firebase,Firebase Realtime Database,Android Arrayadapter,我正在用Firebase制作一个android应用程序,在数据库中写入数据是可行的,但在读取我在数据库中写入的数据时,我被卡住了(我对ArrayAdapter、Firebase没有太多经验,甚至对android也没有太多经验) 当我从手机上打开这个包含Firebase读取的片段时(注意:写入数据在另一个片段中),我的应用程序关闭。不确定是否与此有关 -如何实现和使用ArrayAdapter -如何实现Firebase read -或者我已经更新到Android studio(最新版本SDK 26
Error:Execution failed for task ':app:processDebugManifest'.
> Manifest merger failed : Attribute meta-data#android.support.VERSION@value value=(26.0.0) from [com.android.support:design:26.0.0] AndroidManifest.xml:28:13-35
is also present at [com.android.support:cardview-v7:25.4.0] AndroidManifest.xml:25:13-35 value=(25.4.0).
Suggestion: add 'tools:replace="android:value"' to <meta-data> element at AndroidManifest.xml:26:9-28:38 to override.
configurations.all {
resolutionStrategy.eachDependency { DependencyResolveDetails details ->
def requested = details.requested
if (requested.group == 'com.android.support') {
if (!requested.name.startsWith("multidex")) {
details.useVersion '25.3.0'
}
}
}
}
这是包含listview的充气布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:background="@android:color/black"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="24dp"
android:paddingTop="24dp"
android:text="@string/choose_a_flinder_to_grow"
android:textAlignment="center"
android:textColor="@color/white"
android:textSize="24sp"
android:textStyle="bold" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ListView
android:id="@+id/my_flinders_list_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="@android:color/transparent"
android:stackFromBottom="true"
android:transcriptMode="alwaysScroll"
tools:listitem="@layout/my_flinder" />
</LinearLayout>
</LinearLayout>
这是列表视图的一部分(my_flinder):
这是我的MyFlinderAdapter课程:
public class MyFlinderAdapter extends ArrayAdapter<MyFlinder>{
public MyFlinderAdapter (Context context, int resource, List<MyFlinder> objects){
super(context, resource, objects);
}
@Override
public View getView (int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = ((Activity) getContext()).getLayoutInflater().inflate(R.layout.my_flinder, parent, false);
}
ImageView myFlinderImage = (ImageView) convertView.findViewById(R.id.my_flinder_image);
TextView myFlinderName = (TextView) convertView.findViewById(R.id.my_flinder_name);
TextView myFlinderPoints = (TextView) convertView.findViewById(R.id.my_flinder_points);
TextView myFlinderMoney = (TextView) convertView.findViewById(R.id.my_flinder_money);
MyFlinder myFlinder = getItem(position);
myFlinderImage.setVisibility(View.VISIBLE);
myFlinderName.setVisibility(View.VISIBLE);
myFlinderPoints.setVisibility(View.VISIBLE);
myFlinderMoney.setVisibility(View.VISIBLE);
myFlinderName.setText(myFlinder.getFlinderName());
myFlinderPoints.setText(myFlinder.getFlinderRequiredPoints());
myFlinderMoney.setText((int) myFlinder.getFlinderMoneyValue());
return convertView;
}
}
公共类MyFlinderAdapter扩展了ArrayAdapter{
公共MyFlinderAdapter(上下文上下文、int资源、列表对象){
超级(上下文、资源、对象);
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
if(convertView==null){
convertView=((活动)getContext()).GetLayoutFlater().inflate(R.layout.my_flinder,parent,false);
}
ImageView myFlinderImage=(ImageView)convertView.findViewById(R.id.my\u flinder\u图像);
TextView myFlinderName=(TextView)convertView.findViewById(R.id.my_flinder_name);
TextView myFlinderPoints=(TextView)convertView.findViewById(R.id.my_flinder_points);
TextView myFlinderMoney=(TextView)convertView.findViewById(R.id.my\u flinder\u money);
MyFlinder MyFlinder=getItem(位置);
设置可见性(View.VISIBLE);
myFlinderName.setVisibility(View.VISIBLE);
设置可见性(View.VISIBLE);
设置可见性(View.VISIBLE);
myFlinderName.setText(myFlinder.getFlinderName());
myFlinderPoints.setText(myFlinder.getFlinderRequiredPoints());
myFlinderMoney.setText((int)myFlinder.getFlinderMoneyValue());
返回视图;
}
}
myFlinderMoney.setText((int)myFlinder.getFlinderMoneyValue())代码>
该代码段可能会导致问题。由于您提供的是int
,setText方法假定您提供的int
是资源id。因此它查找该资源,但找不到。你应该把绳子放进去。因此,它会产生以下错误:
07-29 14:27:42.552 4631 4631 E AndroidRuntime:android.content.res.Resources$NotFoundException:String资源ID#0x64
希望有帮助 你太棒了!!我最大的两个问题之一是已修复(这是3天)。现在我不明白为什么我不能从Firebase中读取-这行代码再次停止了我的应用程序:MyFlinder MyFlinder=dataSnapshot.getValue(MyFlinder.class);听到这个消息我很高兴,谢谢:)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:background="@android:color/black"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="24dp"
android:paddingTop="24dp"
android:text="@string/choose_a_flinder_to_grow"
android:textAlignment="center"
android:textColor="@color/white"
android:textSize="24sp"
android:textStyle="bold" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ListView
android:id="@+id/my_flinders_list_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="@android:color/transparent"
android:stackFromBottom="true"
android:transcriptMode="alwaysScroll"
tools:listitem="@layout/my_flinder" />
</LinearLayout>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/my_flinder_linear_layout"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="24dp"
android:gravity="center">
<ImageView
android:id="@+id/my_flinder_image"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/ic_no_text_white"
android:scaleType="centerInside" />
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="3"
android:orientation="vertical">
<TextView
android:id="@+id/my_flinder_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@color/Blue"
android:paddingStart="18dp"
android:paddingTop="20dp"
android:paddingEnd="6dp"
android:paddingBottom="6dp"
android:textSize="20dp"/>
<TextView
android:id="@+id/my_flinder_points"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@color/white"
android:paddingStart="18dp"
android:paddingTop="6dp"
android:paddingEnd="6dp"
android:paddingBottom="6dp"
android:textSize="20dp"/>
</LinearLayout>
<TextView
android:id="@+id/my_flinder_money"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textColor="@color/Pink"
android:paddingStart="20dp"
android:paddingTop="20dp"
android:paddingEnd="6dp"
android:paddingBottom="6dp"
android:textSize="20dp"/>
</LinearLayout>
public class MyFlinderAdapter extends ArrayAdapter<MyFlinder>{
public MyFlinderAdapter (Context context, int resource, List<MyFlinder> objects){
super(context, resource, objects);
}
@Override
public View getView (int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = ((Activity) getContext()).getLayoutInflater().inflate(R.layout.my_flinder, parent, false);
}
ImageView myFlinderImage = (ImageView) convertView.findViewById(R.id.my_flinder_image);
TextView myFlinderName = (TextView) convertView.findViewById(R.id.my_flinder_name);
TextView myFlinderPoints = (TextView) convertView.findViewById(R.id.my_flinder_points);
TextView myFlinderMoney = (TextView) convertView.findViewById(R.id.my_flinder_money);
MyFlinder myFlinder = getItem(position);
myFlinderImage.setVisibility(View.VISIBLE);
myFlinderName.setVisibility(View.VISIBLE);
myFlinderPoints.setVisibility(View.VISIBLE);
myFlinderMoney.setVisibility(View.VISIBLE);
myFlinderName.setText(myFlinder.getFlinderName());
myFlinderPoints.setText(myFlinder.getFlinderRequiredPoints());
myFlinderMoney.setText((int) myFlinder.getFlinderMoneyValue());
return convertView;
}
}