图像和字符串数组的 ListView 不工作

Question

我是 android 编程新手。有人可以帮我吗？我正在测试如何使用 arrayadapter 在列表视图中显示图像和字符串。我什至用不同的方法尝试了基本适配器但同样的问题，应用程序崩溃并且从未运行s.

这是我的 MainActivity.java

的代码

import android.app.Activity;
import android.content.Context;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;


public class MainActivity extends Activity {
    ListView l;
    int [] Images = {R.drawable.img1,R.drawable.img2, R.drawable.img3, R.drawable.img4, R.drawable.img5, R.drawable.img6, R.drawable.img7, R.drawable.img8, R.drawable.img9, R.drawable.img10};
    String [] Titles;
    String [] Description;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Resources resources=getResources();
        Titles = resources.getStringArray(R.array.Title);
        Description = resources.getStringArray(R.array.Description);
        l = findViewById(R.id.listView);
        PopulateRows arrayAdapter = new PopulateRows(this, Titles,Images, Description);
        l.setAdapter(arrayAdapter);

    }
    class PopulateRows extends ArrayAdapter<String>{
        Context context;
        int [] Images;
        String[] Titles;
        String [] Description;
        PopulateRows(Context context, String[] Titles, int[] imgs, String[] Description){
            super(context,R.layout.custom_layout, R.id.textView, Titles);
            this.context=context;
            this.Images=imgs;
            this.Titles=Titles;
            this.Description=Description;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(LAYOUT_INFLATER_SERVICE);
            View row = inflater.inflate(R.layout.custom_layout,parent,false);

            ImageView imageView = row.findViewById(R.id.imageView);
            TextView textView =  row.findViewById(R.id.textView);
            TextView textView1 = row.findViewById(R.id.textView1);

            imageView.setImageResource(Images[position]);
            textView.setText(Titles[position]);
            textView1.setText(Description[position]);
            return row;
        }
    }
}

这里是 activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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="com.example.name.mypackage.MainActivity">

    <ListView
        android:id="@+id/listView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

    </ListView>

</android.support.constraint.ConstraintLayout>

这里还有另一个 custom_layout.xml 文件

<?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"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:srcCompat="@mipmap/ic_launcher"
        android:layout_marginStart="28dp"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="29dp" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="49dp"
        android:text="TextView"
        android:layout_alignTop="@+id/imageView"
        android:layout_toEndOf="@+id/imageView" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/imageView"
        android:layout_alignStart="@+id/textView"
        android:text="TextView" />

</RelativeLayout>

当我运行此代码时，我总是会收到以下错误并且应用程序崩溃：

--------- beginning of crash 09-12 10:11:44.925 4706-4706/com.example.name.mypackageE/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.name.mypackage, PID: 4706 java.lang.OutOfMemoryError: Failed to allocate a 286654476 byte allocation with 4896858 free bytes and 248MB until OOM at dalvik.system.VMRuntime.newNonMovableArray(Native Method) at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method) at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609) at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444) at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:1080) at android.content.res.Resources.loadDrawableForCookie(Resources.java:2638) at android.content.res.Resources.loadDrawable(Resources.java:2543) at android.content.res.Resources.getDrawable(Resources.java:806) at android.content.Context.getDrawable(Context.java:458) at android.widget.ImageView.resolveUri(ImageView.java:826) at android.widget.ImageView.setImageResource(ImageView.java:433) at com.example.name.mypackage.MainActivity$PopulateRows.getView(MainActivity.java:55) at android.widget.AbsListView.obtainView(AbsListView.java:2346) at android.widget.ListView.measureHeightOfChildren(ListView.java:1281) at android.widget.ListView.onMeasure(ListView.java:1188) at android.view.View.measure(View.java:18809) at android.support.constraint.ConstraintLayout.internalMeasureChildren(ConstraintLayout.java:934) at android.support.constraint.ConstraintLayout.onMeasure(ConstraintLayout.java:973) at android.view.View.measure(View.java:18809) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954) at android.widget.FrameLayout.onMeasure(FrameLayout.java:194) at android.view.View.measure(View.java:18809) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1465) at android.widget.LinearLayout.measureVertical(LinearLayout.java:748) at android.widget.LinearLayout.onMeasure(LinearLayout.java:630) at android.view.View.measure(View.java:18809) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5954) at android.widget.FrameLayout.onMeasure(FrameLayout.java:194) at com.android.internal.policy.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2643) at android.view.View.measure(View.java:18809) at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2112) at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1228) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1464) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1119) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6060) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858) at android.view.Choreographer.doCallbacks(Choreographer.java:670) at android.view.Choreographer.doFrame(Choreographer.java:606) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844) at android.os.Handler.handleCallback(Handler.java:746) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5443) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)

使列表显示无图像的代码，仅显示字符串数组

public class MainActivity extends Activity {
    ListView l;
    //int [] Images = {R.drawable.img1,R.drawable.img2, R.drawable.img3, R.drawable.img4, R.drawable.img5, R.drawable.img6, R.drawable.img7, R.drawable.img8, R.drawable.img9, R.drawable.img10};
    String [] Titles;
    String [] Description;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Resources resources=getResources();
        Titles = resources.getStringArray(R.array.Title);
        Description = resources.getStringArray(R.array.Description);
        l = findViewById(R.id.listView);
        PopulateRows arrayAdapter = new PopulateRows(this, Titles, Description);
        l.setAdapter(arrayAdapter);

    }
    class PopulateRows extends ArrayAdapter<String>{
        Context context;
        //int [] Images;
        String[] Titles;
        String [] Description;
        PopulateRows(Context context, String[] Titles, String[] Description){
            super(context,R.layout.custom_layout, R.id.textView, Titles);
            this.context=context;
            //this.Images=imgs;
            this.Titles=Titles;
            this.Description=Description;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(LAYOUT_INFLATER_SERVICE);
            View row = inflater.inflate(R.layout.custom_layout,parent,false);

            //ImageView imageView = row.findViewById(R.id.imageView);
            TextView textView =  row.findViewById(R.id.textView);
            TextView textView1 = row.findViewById(R.id.textView1);

            //imageView.setImageResource(Images[position]);
            textView.setText(Titles[position]);
            textView1.setText(Description[position]);
            return row;
        }
    }
}

Answer 1

尝试使用具有最小尺寸的图像你的代码会因为你正在使用的图像而崩溃，你可以使用更多

android:hardwareAccelerated="false" 
android:largeHeap="true"

在 android 中的清单如下所示

<application
android:allowBackup="true"
android:hardwareAccelerated="false"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:largeHeap="true"
android:supportsRtl="true"
android:theme="@style/AppTheme">

通过this link了解更多....

Answer 2

Java 内存不足错误意味着您的图像分辨率非常高。您的视图未填充，这就是您收到崩溃的原因。

通过为不同的屏幕分辨率制作可绘制来调整图像分辨率 drawable--hdpi, drawable--xhdpi, drawable--xxhdpi, drawable--xxxhdpi.

如果您的图像内容更多，请尝试使用 recycleview 而不是 listview。

图像和字符串数组的 ListView 不工作

ListView of images and String arrays not working

java

android

listview

list

android-arrayadapter