Получение ошибки в настройках камеры для камеры Помощь Neded

Question

Я изучаю захват камеры и устанавливаю ее на обоях из учебников, но получаю ошибку. Я стараюсь найти ее, но не могу понять, что я устанавливаю этот класс в другом классе другим клиентом здесь. код.

public class Camera extends Activity implements View.OnClickListener { 
ImageView iv; 
ImageButton ib; 
Button b; 
Intent i; 
final static int cameraData = 0; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.photo); 
    initilize(); 
} 

@Override 
public void onClick(View v) { 
    // TODO Auto-generated method stub 
    switch (v.getId()) { 
    case R.id.BResults: 

     break; 

    case R.id.ibtakenimage: 
     i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
     startActivityForResult(i, cameraData); 
     break; 
    } 

} 

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    // TODO Auto-generated method stub 
    super.onActivityResult(requestCode, resultCode, data); 
    if (resultCode == RESULT_OK) { 
     Bundle extras = data.getExtras(); 
     Bitmap bmp = (Bitmap) extras.get("Data"); 
     iv.setImageBitmap(bmp); 
    } 
} 

public void initilize() { 
    iv = (ImageView) findViewById(R.id.IVimageview); 
    ib = (ImageButton) findViewById(R.id.ibtakenimage); 
    b = (Button) findViewById(R.id.BResults); 
    b.setOnClickListener(this); 
    ib.setOnClickListener(this); 

} 

}

и вот мой LogCat.

01-14 02:37:21.770: E/Trace(1247): error opening trace file: No such file or directory (2) 
    01-14 02:37:22.200: D/dalvikvm(1247): GC_FOR_ALLOC freed 79K, 9% free 2442K/2660K, paused 55ms, total 57ms 
    01-14 02:37:22.210: I/dalvikvm-heap(1247): Grow heap (frag case) to 3.103MB for 614416-byte allocation 
    01-14 02:37:22.250: D/dalvikvm(1247): GC_FOR_ALLOC freed 2K, 7% free 3040K/3264K, paused 35ms, total 35ms 
    01-14 02:37:22.280: D/dalvikvm(1247): GC_CONCURRENT freed <1K, 7% free 3190K/3416K, paused 4ms+3ms, total 38ms 
    01-14 02:37:22.520: D/gralloc_goldfish(1247): Emulator without GPU emulation detected. 
    01-14 02:37:28.100: I/Choreographer(1247): Skipped 195 frames! The application may be doing too much work on its main thread. 
    01-14 02:37:28.270: I/Choreographer(1247): Skipped 30 frames! The application may be doing too much work on its main thread. 
    01-14 02:37:43.140: I/Choreographer(1247): Skipped 52 frames! The application may be doing too much work on its main thread. 
    01-14 02:37:43.440: D/AndroidRuntime(1247): Shutting down VM 
    01-14 02:37:43.460: W/dalvikvm(1247): threadid=1: thread exiting with uncaught exception (group=0x40a71930) 
    ----->>>> 01-14 02:37:43.530: E/AndroidRuntime(1247): FATAL EXCEPTION: main 
    01-14 02:37:43.530: E/AndroidRuntime(1247): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.androidme/com.example.androidme.Camera}: java.lang.NullPointerException 
    01-14 02:37:43.530: E/AndroidRuntime(1247):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 
    01-14 02:37:43.530: E/AndroidRuntime(1247):  at        android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at android.app.ActivityThread.access$600(ActivityThread.java:141) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at android.os.Handler.dispatchMessage(Handler.java:99) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at android.os.Looper.loop(Looper.java:137) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at android.app.ActivityThread.main(ActivityThread.java:5041) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at java.lang.reflect.Method.invokeNative(Native Method) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at java.lang.reflect.Method.invoke(Method.java:511) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at dalvik.system.NativeStart.main(Native Method) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): Caused by: java.lang.NullPointerException 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at com.example.androidme.Camera.initilize(Camera.java:58) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at com.example.androidme.Camera.onCreate(Camera.java:24) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at android.app.Activity.performCreate(Activity.java:5104) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
    01-14 02:37:43.530: E/AndroidRuntime(1247): ... 11 more 

----> Ошибка запуска.

Answer 1

Caused by: java.lang.NullPointerException 
at com.example.androidme.Camera.initilize(Camera.java:58) 

сообщает об ошибке. В строке 58 вашего класса Camera вы пытаетесь получить доступ к объекту, который не существует, т. Е. Имеет значение NULL.

Она должна быть одна из этих линий:

b.setOnClickListener(this); 
ib.setOnClickListener(this); 

так все, что вам нужно сделать, это проверить, является ли идентификаторы вы набранные прежде, чем правильно с теми, которые вы указали в вашем .xml.