自定义列表视图未显示字符串

Question

列表视图不显示字符串列表，而只显示自定义列表视图文本

我在主目录中的字符串声明

String[] Example = new String[]
        { "Android Introduction","Android Setup/Installation","Android Hello World",
                "Android Layouts/Viewgroups","Android Activity & Lifecycle","Intents in Android",
        "Cz"};
ArrayAdapter<String> ExampleArrayAdapter = new CustomAdapter(this, Example);

    ListView ExampleListView = (ListView)findViewById(R.id.listView);
    ExampleListView.setAdapter(ExampleArrayAdapter);

这是我的 customAdapter.java

public class CustomAdapter extends ArrayAdapter {
private LayoutInflater inflater;
public CustomAdapter (Activity activity, String[] items){
    super(activity, R.layout.custom_layout, items);
    inflater = activity.getWindow().getLayoutInflater();
}

@Override
public View getView(int position, View convertView, ViewGroup parent){
 Random rnd = new Random();

   int color = Color.argb(255, rnd.nextInt(256), rnd.nextInt(257), rnd.nextInt(258));

  View rowView = inflater.inflate(R.layout.custom_layout, parent, false);
    rowView.setBackgroundColor(color);

    return rowView;


}
}

这是我的应用程序的自定义布局，我已经更新了它...... custom_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_marginTop="70dp"
android:layout_height="70dp"
android:background="@drawable/blue_bg">

<LinearLayout
    android:layout_marginLeft="20dp"
    android:layout_width="345dp"
    android:layout_height="70dp"
    android:background="@drawable/white_bg">
    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="70dp"
        android:layout_height="60dp"
        android:src="@drawable/ic_launcher"
        android:layout_marginLeft="5dp"
        android:layout_marginTop="5dp" />


    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_marginLeft="10dp"
        android:gravity="left" >


        <TextView
            android:id="@+id/textView1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Large Text"
            android:layout_marginTop="10dp"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:textSize="19sp"
            android:textColor="#000000"
            android:textStyle="bold" />


        <TextView
            android:id="@+id/textView2"
            android:layout_width="match_parent"
            android:layout_height="15dp"
            android:text="Tweet body text here"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:layout_marginTop="5dp"
            android:ellipsize="end"
            android:lines="3"
            android:textColor="#000000"
            android:textSize="14sp" />


    </LinearLayout>

</LinearLayout>

</LinearLayout>

Answer 1

您必须在 Activity 中将您的 CustomAdapter 对象声明为：

CustomAdapter ExampleArrayAdapter = new CustomAdapter(this, Example);

    ListView ExampleListView = (ListView)findViewById(R.id.listView);
    ExampleListView.setAdapter(ExampleArrayAdapter);

你的适配器代码应该是：

public class CustomAdapter extends ArrayAdapter{
private LayoutInflater inflater;
private String[] items;
public CustomAdapter (Activity activity, String[] items){
          super(activity, 0, items);
    inflater = activity.getWindow().getLayoutInflater();
}

@Override
public View getView(int position, View convertView, ViewGroup parent){
 Random rnd = new Random();

   int color = Color.argb(255, rnd.nextInt(256), rnd.nextInt(257), rnd.nextInt(258));

  View rowView = inflater.inflate(R.layout.custom_layout, parent, false);
    rowView.setBackgroundColor(color);
TextView tv = (TextView) rowView .findViewById(R.id.textView1);
tv.setText(items[position]);
    return rowView;


}
}

Answer 2

Listview is not showing the string list rather showing only the custom list view text

因为您没有在 ListView 的每一行中为 TextView 设置文本，只是设置行的颜色。

因此自定义 getView 方法并从 items 字符串数组设置 TextView 文本。请参阅以下示例以获得更多帮助： Using an ArrayAdapter with ListView

自定义列表视图未显示字符串

Custom Listview is not showing up the string

android