如何为Arraylist Listactivity设置自定义字体

时间：2013-09-18 02:25:16

标签： java android arraylist listactivity custom-font

所以我搜索并发现我需要创建一个自定义数组适配器来更改listview活动的字体。我的列表活动包括一个arraylist。所以我这样做了

public class CustomArrayAdapter extends ArrayAdapter <String> {

private Typeface tf;
private LayoutInflater inflater;
private int resource;
private int textViewResourceId;
private ArrayList<String> objects;

public CustomArrayAdapter(Context context, int resource, int textViewResourceId,
        ArrayList<String> favorites, Typeface tf) {
    super(context, resource, textViewResourceId, favorites);
    this.tf = tf;
    this.resource = resource;
    this.textViewResourceId = textViewResourceId;
    this.objects = favorites;
    inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}



@Override
public View getView(int position, View convertView, ViewGroup parent) {

    if (convertView == null) {
        convertView = inflater.inflate(resource, parent, false);    
    }

    TextView text = (TextView) convertView.findViewById(textViewResourceId);
    text.setTypeface(tf);

    return convertView;
}

}

这是我的Listactivity 

public class Favorites extends ListActivity  {

public static ArrayList<String> favorites = new ArrayList<String>();
public static final String PREFS_NAME ="SAVEDATA";

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);



     Typeface cFont = Typeface.createFromAsset(getAssets(), "annoyingkettle.ttf");

     setListAdapter(new CustomArrayAdapter(this, android.R.layout.simple_list_item_1, R.id.ListView01, favorites, cFont));

这不起作用，我不知道为什么。当我尝试打开它时，我的listactivity崩溃了。我该如何解决这个问题？

这是我的xml 

<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/ListView01" >

编辑：这是LogCat 

    '09-18 02:36:16.036: E/Trace(15562): error opening trace file: No such file or directory (2)
09-18 02:36:17.486: D/dalvikvm(15562): GC_FOR_ALLOC freed 73K, 7% free 2655K/2848K, paused 251ms, total 287ms
09-18 02:36:17.539: I/dalvikvm-heap(15562): Grow heap (frag case) to 3.781MB for 1127536-byte allocation
09-18 02:36:17.826: D/dalvikvm(15562): GC_FOR_ALLOC freed 2K, 5% free 3754K/3952K, paused 274ms, total 274ms
09-18 02:36:18.066: D/dalvikvm(15562): GC_CONCURRENT freed <1K, 5% free 3769K/3952K, paused 5ms+13ms, total 224ms
09-18 02:36:18.316: D/gralloc_goldfish(15562): Emulator without GPU emulation detected.
09-18 02:36:24.436: D/AndroidRuntime(15562): Shutting down VM
09-18 02:36:24.436: W/dalvikvm(15562): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
09-18 02:36:24.588: E/AndroidRuntime(15562): FATAL EXCEPTION: main
09-18 02:36:24.588: E/AndroidRuntime(15562): java.lang.NullPointerException
09-18 02:36:24.588: E/AndroidRuntime(15562):    at com.mkaya.ultimatejokescollection.CustomArrayAdapter.getView(CustomArrayAdapter.java:41)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.widget.AbsListView.obtainView(AbsListView.java:2159)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.widget.ListView.makeAndAddView(ListView.java:1831)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.widget.ListView.fillDown(ListView.java:674)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.widget.ListView.fillFromTop(ListView.java:735)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.widget.ListView.layoutChildren(ListView.java:1652)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.widget.AbsListView.onLayout(AbsListView.java:1994)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.View.layout(View.java:14008)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.ViewGroup.layout(ViewGroup.java:4373)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.View.layout(View.java:14008)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.ViewGroup.layout(ViewGroup.java:4373)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1663)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1521)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.View.layout(View.java:14008)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.ViewGroup.layout(ViewGroup.java:4373)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.View.layout(View.java:14008)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.ViewGroup.layout(ViewGroup.java:4373)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1892)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1711)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:989)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4351)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.Choreographer.doCallbacks(Choreographer.java:562)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.Choreographer.doFrame(Choreographer.java:532)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.os.Handler.handleCallback(Handler.java:725)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.os.Handler.dispatchMessage(Handler.java:92)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.os.Looper.loop(Looper.java:137)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at android.app.ActivityThread.main(ActivityThread.java:5041)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at java.lang.reflect.Method.invokeNative(Native Method)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at java.lang.reflect.Method.invoke(Method.java:511)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
09-18 02:36:24.588: E/AndroidRuntime(15562):    at dalvik.system.NativeStart.main(Native Method)
09-18 02:36:27.846: I/Process(15562): Sending signal. PID: 15562 SIG: 9

2 个答案:

答案 0 :(得分：0)

检查TextView text = (TextView) convertView.findViewById(textViewResourceId);是否为空。

尝试更改

setListAdapter(new CustomArrayAdapter(this, android.R.layout.simple_list_item_1, R.id.ListView01, favorites, cFont));

到

setListAdapter(new CustomArrayAdapter(this, android.R.layout.simple_list_item_1, android.R.id.text1, favorites, cFont));

答案 1 :(得分：0)

这可能是因为您的字体可能为空。您必须将字体放在资源中的fonts文件夹中，并在活动中访问，如Typeface.createFromAssets（getAssets（），“fonts / yourFontname”）;.

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