java 如何在将列表项添加到 ListView 之前以编程方式设置列表项中的字体大小？

How to programmatically set the size of the font in the list item before adding it to the ListView?

提问by Siruk Viktor

I'm interested in how you can change the size of the text in the list and then add it to the ListView. I'm using a list_item with custom layout . The question is how you can set the size of the text before it gets into the ListView. I hope for your help.

我对如何更改列表中文本的大小然后将其添加到 ListView 感兴趣。我正在使用带有自定义布局的 list_item 。问题是如何在文本进入 ListView 之前设置文本的大小。我希望得到你的帮助。

list_item.xml

列表项.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    xmlns:android1="http://schemas.android.com/apk/res/android">

<LinearLayout
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    >

    <TextView
        android:id="@+id/shop_name"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="1"
        />

    <TextView
        android:id="@+id/shop_address"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="2"
        />

</LinearLayout>

</LinearLayout>

day_list_events.xml

day_list_events.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:layout_gravity="center"
    android:id="@+id/layout"
    >

<TextView 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:id="@+id/day_and_data"
    android:text="Перел?к кл??нт?в на сьогодн?шн?й день."
    android:textStyle="bold"
    />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:id="@+id/help_info"
    android:text="(Щоб отримати ?нформац?ю про кл??нта та оформити замовлення - натисн?ть на в?дпов?дного кл??нта у списку)"
    android:textColor="#A0A0A0"
    />

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

</ListView>

</LinearLayout>

DayListEventsActivity.java

DayListEventsActivity.java

import java.util.ArrayList;
import java.util.HashMap;

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.Window;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class DayListEventsActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.day_list_events);
    sharedPreferences = getSharedPreferences("impInfo", Context.MODE_PRIVATE);
    Resources res = this.getResources();
    ArrayList<HashMap<String, String>> dayShopsInfo = new ArrayList<HashMap<String, String>>();
    String[] shopName = res.getStringArray(R.array.shop_name);
    String[] shopAddress = res.getStringArray(R.array.shop_address);        
    for(int i = 0; i < shopName.length; i++){
        HashMap<String, String> dayShopsInfoCont = new HashMap<String, String>();
        dayShopsInfoCont.put(KEY_SHOP_NAME, shopName[i]);
        dayShopsInfoCont.put(KEY_SHOP_ADDRESS, shopAddress[i]);
        System.out.println(i+" "+shopName[i]+" "+shopAddress[i]);
        dayShopsInfo.add(dayShopsInfoCont);         
    }
    ListView shopList = (ListView)findViewById(R.id.day_list_event);
    SimpleAdapter shopListAdapter = new SimpleAdapter(this,
            dayShopsInfo,
            R.layout.list_item,
            new String[]{KEY_SHOP_NAME, KEY_SHOP_ADDRESS},
            new int[]{R.id.shop_name, R.id.shop_address});
    shopList.setAdapter(shopListAdapter);
    shopList.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
}

private final String KEY_SHOP_NAME = "shop name";
private final String KEY_SHOP_ADDRESS = "shop address";
private SharedPreferences sharedPreferences;
}

UPDATE (Solution).

更新（解决方案）。

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

public class DayListEventsActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.day_list_events);
    sharedPreferences = getSharedPreferences("impInfo", Context.MODE_PRIVATE);
    Resources res = this.getResources();
    ArrayList<HashMap<String, String>> dayShopsInfo = new ArrayList<HashMap<String, String>>();
    String[] shopName = res.getStringArray(R.array.shop_name);
    String[] shopAddress = res.getStringArray(R.array.shop_address);        
    for(int i = 0; i < shopName.length; i++){
        HashMap<String, String> dayShopsInfoCont = new HashMap<String, String>();
        dayShopsInfoCont.put(KEY_SHOP_NAME, shopName[i]);
        dayShopsInfoCont.put(KEY_SHOP_ADDRESS, shopAddress[i]);
        System.out.println(i+" "+shopName[i]+" "+shopAddress[i]);
        dayShopsInfo.add(dayShopsInfoCont);         
    }
    ListView shopList = (ListView)findViewById(R.id.day_list_event);
    MySimpleAdapter shopListAdapter = new MySimpleAdapter(this,
            dayShopsInfo,
            R.layout.list_item,
            new String[]{KEY_SHOP_NAME, KEY_SHOP_ADDRESS},
            new int[]{R.id.shop_name, R.id.shop_address});
    shopList.setAdapter(shopListAdapter);
    shopList.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
}

public class MySimpleAdapter extends SimpleAdapter{

    public MySimpleAdapter(Context context,
                            List<? extends Map<String, ?>> data,
                            int resource,
                            String[] from, int[] to) {
        super(context, data, resource, from, to);           
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent){
        View returnView = super.getView(position, convertView, parent);
        TextView shopName = (TextView)returnView.findViewById(R.id.shop_name);
        shopName.setTextSize(20.0f);
        return returnView;
    }

}

private final String KEY_SHOP_NAME = "shop name";
private final String KEY_SHOP_ADDRESS = "shop address";
private SharedPreferences sharedPreferences;
}

回答by Kumar Vivek Mitra

Simply do this in the getView()method of the Adapter, to set the fontsize.

只需在 , 的getView()方法中执行此操作Adapter即可设置font大小。

tv.setTextSize(20.0f);

tv.setTextSize(20.0f);

回答by Piotr Chojnacki

If you are using xml for setting layout for list_itemand there you have TextViewyou can change the size of the text like this:

如果您使用 xml 来设置布局，list_item那么TextView您可以像这样更改文本的大小：

<TextView  
    android:id="@+id/text_id"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:textSize="20sp" /> // This is a size of your text

回答by Givi

There's not "size of text" You can change the size of the text inside the TextView: Add:

没有“文本大小”您可以更改 TextView 内文本的大小：添加：

 android:textSize="16sp" 

TO your XML Or you can do it by code in the getView() method in the Adapter:

到你的 XML 或者你可以通过 Adapter 中的 getView() 方法中的代码来完成：

YOUR_TEXTVIEW.setTextSize(16);

回答by Mark Dail

I know this might be a little late, however I noticed that everyone forgot something in their answers. the method setTextSize takes 2 parameters for it's input. The second if a float that is the number of the size you want. The first is a TypedValue Constant to let specify what the number means ie: pixels, dip, sp, etc... so for the setTextSize set to 18sp it would look something like this:

我知道这可能有点晚了，但是我注意到每个人都忘记了他们的答案。方法 setTextSize 需要 2 个参数作为输入。第二个如果是您想要的大小的数字的浮点数。第一个是 TypedValue 常量，用于指定数字的含义，即：像素、倾角、sp 等...因此对于设置为 18sp 的 setTextSize，它看起来像这样：

TextView yourTextView = (TextView)findViewById(R.id.yourTextViewId);
yourTextView.setTextSize(TypedValue.COMPLEX_UNIT_SP,18)

and you would do it in the getView of the ArrayAdapter. Hope this helps someone else who was looking for an answer and stumble upon this one.

并且您将在 ArrayAdapter 的 getView 中执行此操作。希望这可以帮助其他正在寻找答案并偶然发现这个答案的人。

回答by Nirav Ranpara

Try this one

试试这个

TextView textView = (TextView) findViewById (R.id.yourTextViewId);
textView.setTextSize(18);