,我發現了以下異常:java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{cs.workshop.solvedroid/cs.workshop.solvedroid.SolveCaptureActivity}: java.lang.NullPointerException
變得異常:無法實例活動ComponentInfo
當我運行應用程序,得到的MainMenuActivity並嘗試打開SolveCaptureAvctivity我得到的例外。
我對這個例外有其他問題,但他們都指向AndroidManifest.xml,它似乎對我來說很好。它會是什麼?請幫助
public class SolveCaptureActivity extends Activity {
Button bCamera; ImageView captured_image =(ImageView)findViewById(R.id.image_capture_photo);
private static final int PICTURE_REQUEST = 0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.solve_capture);
Log.e("mydebug", "ERROR ERROR ERROR");
/*
// "Back" button
Button bBack = (Button) findViewById(R.id.button_back);
bBack.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent gotoBack = new Intent();
setResult(RESULT_OK, gotoBack);
finish();
}
});
*/
// "Camera" button
bCamera = (Button) findViewById(R.id.button_camera);
bCamera.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent camera = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(camera, PICTURE_REQUEST);
int caemraRequestCode = 0, CameraResultCode = -1;
Intent data = new Intent();
try{
onActivityResult(caemraRequestCode, CameraResultCode, data);
}
catch(Exception e){
Log.e("mydebug", "ERROR ERROR ERROR");
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.d("mylog", "here1");
Log.d("mylog", Integer.toString(requestCode));
Log.d("mylog", Integer.toString(resultCode));
if (requestCode == PICTURE_REQUEST) {
Log.d("mylog", "here2");
if (resultCode == Activity.RESULT_OK){
// Display image received on the view;
Log.d("mylog", "here3");
Log.d("mylog", "here4");
Bitmap photo = (Bitmap) data.getExtras().get("data");
if (photo != null) { // Display your image in an ImageView in your layout (if you want to test it)
Log.d("mylog", "here5");
ImageView pictureHolder = (ImageView) findViewById(R.id.image_capture_photo);
pictureHolder.setImageBitmap(photo);
}
}
}
}
});
}
}
public class MainMenuActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mainmenu);
// "Solve Capture" button
Button bSlvCapture = (Button) findViewById(R.id.button_mainmenu_solvecapture);
bSlvCapture.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent gotoSolveCapture = new Intent(v.getContext(), SolveCaptureActivity.class);
startActivityForResult(gotoSolveCapture, 0);
}
});
// "Solve Manual" button
Button bSlvManual = (Button) findViewById(R.id.button_mainmenu_solvemanual);
bSlvManual.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent gotoSolveManual = new Intent(v.getContext(), SolveManualActivity.class);
startActivityForResult(gotoSolveManual, 0);
}
});
// "About" button
Button bAbout = (Button) findViewById(R.id.button_mainmenu_about);
bAbout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent gotoAbout = new Intent(v.getContext(), AboutActivity.class);
startActivityForResult(gotoAbout, 0);
}
});
} }
08-07 18:33:23.854:我NFO/ActivityManager(70):顯示cs.workshop.solvedroid/.MainMenuActivity:+ 4s385ms 08-07 18:33:26.784:INFO/ActivityManager(70):Starting:Intent {cmp = cs.workshop.solvedroid/.AboutActivity }來自pid 330 08-07 18:33:26.984:DEBUG/dalvikvm(330):GC_EXTERNAL_ALLOC釋放了11K,53%空閒2582K/5379K,外部7607K/9499K,暫停51ms 08-07 18:33:28.434:INFO/ActivityManager(70):顯示cs.workshop.solvedroid/.AboutActivity:+ 1s68ms 08-07 18:33:29.104:WARN/KeyCharacterMap(330):沒有鍵盤爲0 0 08-07 18:33:29.104: WARN/KeyCharacterMap(330):使用默認鍵盤映射:/system/usr/keychars/qwerty.kcm.bin 08-07 18:33:30.674:INFO/ActivityManager(70):Starting:Intent {cmp = cs.workshop。 solveroid/.SolveCaptureActivity} from pid 330 08-07 18:33:30.834:DEBUG/AndroidRunt ime(330):關閉虛擬機 08-07 18:33:30.834:WARN/dalvikvm(330):threadid = 1:線程正在以未捕獲的異常退出(group = 0x40015560) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):致命例外:main 08-07 18:33:30.874:錯誤/ AndroidRuntime(330):java.lang.RuntimeException:無法實例化活動ComponentInfo {cs.workshop.solvedroid/cs.workshop.solvedroid .SolveCaptureActivity}:java.lang.NullPointerException 08-07 18:33:30.874:ERROR/AndroidRuntime(330):at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1544) 08-07 18:33:30.874 :ERROR/AndroidRuntime(330):at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1638) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):at android.app.ActivityThread.access $ 1500( ActivityThread.java:117) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):at android.app.ActivityThread $ H.handleMessage(ActivityThread.java:928) 08-07 18:33:30.874:ERROR/AndroidRuntime(330) :at android.os.Handler.dispatchMessage(Handler.java:99) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):at android.os.Looper.loop(Looper.java:123) 08 -07 18:33:30.874:錯誤/ AndroidRuntime(330):在android.app.ActivityThread.main(ActivityThread.java:3647) 08-07 18:33:30.874:錯誤/ AndroidRuntime(330):在java。 lang.reflect.Method.invokeNative(Native Method) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):at java.lang.reflect.Method.invoke(Method.java:507) 08-07 18 :33:30.874:錯誤/ AndroidRuntime(330):at com。android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:839) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):at com.android.internal.os.ZygoteInit.main(ZygoteInit。 java:597) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):at dalvik.system.NativeStart.main(Native Method) 08-07 18:33:30.874:ERROR/AndroidRuntime(330)由於:java.lang.NullPointerException 08-07 18:33:30.874:ERROR/AndroidRuntime(330):at android.app.Activity.findViewById(Activity.java:1647) 08-07 18:33:30.874: ERROR/AndroidRuntime(330):at cs.workshop.solvedroid.SolveCaptureActivity。(SolveCaptureActivity.java:15) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):at java.lang.Class.newInstanceImpl(Native方法) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):at java.lang.Class.newIns tance(Class.java:1409) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):at android.app.Instrumentation.newActivity(Instrumentation.java:1021) 08-07 18:33:30.874: ERROR/AndroidRuntime(330):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1536) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):... 11更
manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="cs.workshop.solvedroid"
android:versionCode="1"
android:versionName="1.0">
uses-sdk android:minSdkVersion="9" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:label="@string/app_name" android:name=".MainMenuActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:label="@string/app_name" android:name="AboutActivity"></activity>
<activity android:label="@string/app_name" android:name="SolveCaptureActivity"></activity>
<activity android:label="@string/app_name" android:name="SolveManualActivity"></activity>
<activity android:label="@string/app_name" android:name="ManualSolutionActivity"></activity>
</application>
manifest>
+1爲管理閱讀在這混亂:) – MByD