android - ArrayAdapter 在微调器中未激活
问题描述
我尝试将微调器与数组适配器一起使用,它将在没有任何错误的情况下停止,任何人都可以告诉我代码中的错误我需要出现带有文本的图像我通过自定义适配器尝试过并显示相同的结果任何人请帮助我android应用程序开发人员的新功能
主.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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">
<Spinner
android:id="@+id/spinner"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="47dp"
android:spinnerMode="dropdown">
</Spinner>
</RelativeLayout>
spinner_item
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<ImageView
android:id="@+id/i1"
android:layout_width="100dp"
android:layout_height="100dp"
android:src="@drawable/image" />
<TextView
android:id="@+id/txt1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="15dp"
android:text="Orange"
android:textSize="30dp"
android:textStyle="bold" />
</LinearLayout>
主.java
package com.safaa.user.spinner;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Spinner;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
String[] names={"apple","panana","orange"};
int[]images={R.drawable.image,R.drawable.image3,R.drawable.image2
};
CustomAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Spinner spinner=findViewById(R.id.spinner);
adapter=new CustomAdapter(this,names,images);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getApplicationContext(),names[position],Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
}
自定义适配器
package com.safaa.user.spinner;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class CustomAdapter extends ArrayAdapter<String>{
Context context;
String []names;
int image[];
public CustomAdapter(Context context, String[]names,int[]image) {
super(context, R.layout.spinner_item,names);
this.image=image;
this.names=names;
this.context=context;
}
@Override
public View getDropDownView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater=(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row =inflater.inflate(R.layout.spinner_item,null);
TextView t1=row.findViewById(R.id.txt1);
ImageView i1=row.findViewById(R.id.i1);
t1.setText(names[position]);
i1.setImageResource(image[position]);
return row;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater=(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row =inflater.inflate(R.layout.spinner_item,null);
TextView t1=row.findViewById(R.id.txt1);
ImageView i1=row.findViewById(R.id.i1);
t1.setText(names[position]);
i1.setImageResource(image[position]);
return row;
}
}
解决方案
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