java我想为GridView设置字体

Question

我想为TextView设置字体，它是GridView的适配器。我需要从资产文件夹访问字体

TextView listitem = (TextView) findViewById(R.id.listitem);
listitem.setTypeface(Typeface.createFromAsset(this.getAssets(), "DroidSans4.ttf"));

我面临着一系列错误

> 
05-01 14:38:54.510: E/AndroidRuntime(9088): FATAL EXCEPTION: main
05-01 14:38:54.510: E/AndroidRuntime(9088): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.andro.sqllite/com.andro.sqllite.UsingSQLiteActivity}: java.lang.NullPointerException
05-01 14:38:54.510: E/AndroidRuntime(9088):     at 安卓.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
05-01 14:38:54.510: E/AndroidRuntime(9088):     at 安卓.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
05-01 14:38:54.510: E/AndroidRuntime(9088):     at 安卓.app.ActivityThread.access$1500(ActivityThread.java:117)
05-01 14:38:54.510: E/AndroidRuntime(9088):     at 安卓.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
05-01 14:38:54.510: E/AndroidRuntime(9088):     at 安卓.os.Handler.dispatchMessage(Handler.java:99)
05-01 14:38:54.510: E/AndroidRuntime(9088):     at 安卓.os.Looper.loop(Looper.java:123)
05-01 14:38:54.510: E/AndroidRuntime(9088):     at 安卓.app.ActivityThread.main(ActivityThread.java:3683)
05-01 14:38:54.510: E/AndroidRuntime(9088):     at java.lang.reflect.Method.invokeNative(Native Method)
05-01 14:38:54.510: E/AndroidRuntime(9088):     at java.lang.reflect.Method.invoke(Method.java:507)
05-01 14:38:54.510: E/AndroidRuntime(9088):     at com.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
05-01 14:38:54.510: E/AndroidRuntime(9088):     at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:597)
05-01 14:38:54.510: E/AndroidRuntime(9088):     at dalvik.system.NativeStart.main(Native Method)
05-01 14:38:54.510: E/AndroidRuntime(9088): Caused by: java.lang.NullPointerException
05-01 14:38:54.510: E/AndroidRuntime(9088):     at com.andro.sqllite.UsingSQLiteActivity.onCreate(UsingSQLiteActivity.java:92)
05-01 14:38:54.510: E/AndroidRuntime(9088):     at 安卓.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-01 14:38:54.510: E/AndroidRuntime(9088):     at 安卓.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
05-01 14:38:54.510: E/AndroidRuntime(9088):     ... 11 more

在这行代码中，我面临以下错误：

listitem.setTypeface(Typeface.createFromAsset(this.getAssets(), "DroidSans4.ttf"));

谁能指导我如何设置GridView的字体？或者在这方面指导我

Answer 1

参考这个,

public class Main extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Typeface tf = Typeface.createFromAsset(getAssets(),
                "fonts/BPreplay.otf");
        TextView tv = (TextView) findViewById(R.id.CustomFontText);
        tv.setTypeface(tf);
    }
}

Answer 2

R.id.listitem是网格项的布局吗？如果是这样，您需要在适配器的getView（）方法中设置字体，而不是在onCreate中设置字体。在onCreate（）期间，尚未创建任何网格项。这就是为什么findById返回null，导致NPE。如果需要更多帮助，请发布适配器的代码

Answer 3

好像你在TextView listitem = (TextView) findViewById(R.id.listitem);之前没有给setContentView打过电话

Answer 4

尝试以下代码来应用字体。。。但首先，您需要将适当的字体（您需要的）复制到资产/字体文件夹中

TextView listitem = (TextView) findViewById(R.id.listitem);
font = Typeface.createFromAsset(this.getAssets(), "fonts/DroidSansFallback.ttf");
listitem.setTypeface(font);
listitem.setText("जहां आप जाना चाहते हैं");