为什么我得到这些错误，java truetype错误？

Question

为什么eclipse不让我编译这个。 我想让自己点击一个按钮，然后Edittext数据转到Textview。然后从那里我想textView通过按另一个Button被转换成一个条形码，所以我有2 Buttons和2 textViews和1 editTexts共

请告知如何做到这一点或者I，M错

public class cc extends Activity { 

EditText inputc; 
TextView outputc; 
TextView tv1; 
ImageView iv; 
Button b; 

protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.cc); 

inputc = (EditText) findViewById(R.id.ccinput); 
outputc = (TextView) findViewById(R.id.outputc); 
Button send = (Button) findViewById(R.id.button); 
final TextView tv1 = (TextView) findViewById(R.id.outputc); 
tv1.setDrawingCacheEnabled(true); 

//To change to code 39 barCode font 
Typeface barcodefont = Typeface.createFromAsset(getAssets(), "fonts/IDAutomationHC39M_FREE.otf");   
TextView tv = (TextView) findViewById(R.id.outputc);   
tv.setTypeface(barcodefont); 

send.setOnClickListener (new View.OnClickListener() { 

    @Override 
    public void onClick(View v) { 
     // TODO Auto-generated method stub 
     tv1.buildDrawingCache(); 
     iv.setImageBitmap(tv1.getDrawingCache()); 
     outputc.setText((inputc.getText())); 
    } 
}); 

} 
} 

ADTIONAL INFO。 我编了，但现在我得到的错误，这里是logcat的：

10-16 15:41:11.095: E/AndroidRuntime(5822): FATAL EXCEPTION: main 
10-16 15:41:11.095: E/AndroidRuntime(5822): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.barcodedisplayer/com.example.barcodedisplayer.cc}: java.lang.RuntimeException: native typeface cannot be made 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2355) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2405) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at android.app.ActivityThread.access$600(ActivityThread.java:156) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1272) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at android.os.Handler.dispatchMessage(Handler.java:99) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at android.os.Looper.loop(Looper.java:137) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at android.app.ActivityThread.main(ActivityThread.java:5303) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at java.lang.reflect.Method.invokeNative(Native Method) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at java.lang.reflect.Method.invoke(Method.java:525) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at dalvik.system.NativeStart.main(Native Method) 
10-16 15:41:11.095: E/AndroidRuntime(5822): Caused by: java.lang.RuntimeException: native typeface cannot be made 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at android.graphics.Typeface.<init>(Typeface.java:175) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at android.graphics.Typeface.createFromAsset(Typeface.java:149) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at com.example.barcodedisplayer.cc.onCreate(cc.java:32) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at android.app.Activity.performCreate(Activity.java:5207) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2309) 
10-16 15:41:11.095: E/AndroidRuntime(5822):  ... 11 more 

Answer 1

错误在你的logcat指向该行：

Typeface barcodefont = Typeface.createFromAsset(getAssets(), "fonts/IDAutomationHC39M_FREE.otf");

确保fonts/IDAutomationHC39M_FREE.otf存在，这不是腐败，那名大小写完全匹配。

另外，如果上述方法不工作，尝试在这里找到了建议：Custom fonts in android

Answer 2

你ImageView的iv未初始化。您将获得NullPointerException。初始化iv

iv = (ImageView) findViewById(R.id.yourimageviewid); 

这是一个错误。正如@NickT指出，这将是一个运行时错误。

你的TextView outputc和TV1都具有相同ID R.id.outputc

outputc = (TextView) findViewById(R.id.outputc); 
    final TextView tv1 = (TextView) findViewById(R.id.outputc); 

初始化，你有

TextView tv = (TextView) findViewById(outputc); 
// remove this line or use R.id.yourtextviewid 
// outputc is a textview 

请确保您有IDAutomationHC39M_FREE.otf下/租入资产价值/字体。

Answer 3

有几件事错在这里：

你已经宣布TextView tv1;所以你不必再做了final TextView tv1 = (TextView) findViewById(R.id.outputc);

您还mentionned：

，所以我有2个按钮和2个textViews和1个editTexts altogther

public class cc extends Activity {

EditText inputc; 
TextView outputc; 
TextView tv1; 
ImageView iv; 
Button b; 
Button send; 

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.cc); 

    inputc = (EditText) findViewById(R.id.ccinput); 
    outputc = (TextView) findViewById(R.id.outputc); 
    send = (Button) findViewById(R.id.button); 
    tv1 = (TextView) findViewById(R.id.outputc); 
    tv1.setDrawingCacheEnabled(true); 

    //To change to code 39 barCode font 
    Typeface barcodefont = Typeface.createFromAsset(getAssets(), 
       "fonts/IDAutomationHC39M_FREE.otf"); 


    outputc.setTypeface(barcodefont); 

    send.setOnClickListener (new View.OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      // TODO Auto-generated method stub 
      tv1.buildDrawingCache(); 
      iv.setImageBitmap(tv1.getDrawingCache()); 
      outputc.setText((inputc.getText())); 
     } 
    }); 
} 
}