をインスタンス化できません、私は次の例外を取得しています:java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{cs.workshop.solvedroid/cs.workshop.solvedroid.SolveCaptureActivity}: java.lang.NullPointerException
なっ例外:活動ComponentInfo
私はアプリケーションを実行すると、MainMenuActivityに取得し、私は例外を取得SolveCaptureAvctivityを開こう。
この例外について他の質問がありますが、それらはすべてAndroidManifest.xmlを指しており、 は私にとってうまく感じます。それは何でしょうか?助けてください
public class SolveCaptureActivity extends Activity {
ボタン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);
}
});
}}
8月7日18:33:23.854:I NFO/ActivityManager(70):表示されたcs.workshop.solvedroid/.MainMenuActivity:+ 4s385ms 08-07 18:33:26.784:INFO/ActivityManager(70):開始:インテント{cmp = cs.workshop.solvedroid/.AboutActivity } 330から 08-07 18:33:26.984:DEBUG/dalvikvm(330):GC_EXTERNAL_ALLOCは11K、53%フリー2582K/5379K、外部7607K/9499K、一時停止51ms 08-07 18:33:28.434:INFO/ActivityManager(70):表示されたcs.workshop.solvedroid/.AboutActivity:+ 1s68ms 08-07 18:33:29.104:WARN/KeyCharacterMap(330):ID 0のキーボードなし 08-07 18:33:29.104: WARN/KeyCharacterMap(330):デフォルトのキーマップを使用する:/system/usr/keychars/qwerty.kcm.bin 08-07 18:33:30.674:INFO/ActivityManager(70):開始:Intent {cmp = cs.workshop。 solvedroid/.SolveCaptureActivity} from pid 330 08-07 18:33:30.834:DEBUG/AndroidRunt dwvikvm(330):threadid = 1:キャッチされない例外(グループ= 0x40015560)でスレッドが終了する 08-07 18:33:30.874:ERROR/AndroidRuntime(330):致命的な例外:メイン 08-07 18:33:30.874:ERROR/AndroidRuntime(330):java.lang.RuntimeException:アクティビティをインスタンス化できませんComponentInfo {cs.workshop.solvedroid/cs.workshop.solvedroid .SolveCaptureActivity}:java.lang.NullPointerException 08-07 18:33:30.874:ERROR/AndroidRuntime(330):android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1544) 08-07 18:33:30.874 :ERROR/AndroidRuntime(330):android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1638) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):android.app.ActivityThread.access $ 1500 ActivityThread.java:117) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):android.app.ActivityThread $ H.handleMessage(ActivityThread.java:928) 08-07 18:33:30.874:ERROR/AndroidRuntime(330) :android.os.Handler.dispatchMessage(Handler.java:99) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):android.os.Looper.loop(Looper.java:123) 08 -07 18:33:30.874:ERROR/AndroidRuntime(330):android.app.ActivityThread.main(ActivityThread.java:3647) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):at java。 lang.reflect.Method.invokeNative(ネイティブメソッド) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):java.lang.reflect.Method.invoke(Method.java:507) 08-07 18 :33:30.874:ERROR/AndroidRuntime(330):com。android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:839) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):com.android.internal.os.ZygoteInit.main(ZygoteInit。08-07 18:33:30.874:ERROR/AndroidRuntime(330):エラー:原因:java.lang.NullPointerException 08-07 18:33:30.874:ERROR/AndroidRuntime(330):android.app.Activity.findViewById(Activity.java:1647) 08-07 18:33:30.874: ERROR/AndroidRuntime(330):cs.workshop.solvedroid.SolveCaptureActivity(SolveCaptureActivity.java:15) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):java.lang.Class.newInstanceImpl(ネイティブメソッド) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):java.lang.Class.newIns (クラス:java:1409) 08-07 18:33:30.874:ERROR/AndroidRuntime(330):android.app.Instrumentation.newActivity(Instrumentation.java:1021) 08-07 18:33:30.874: ERROR/AndroidRuntime(330):android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1536)で 8月7日18:33:30.874:ERROR/AndroidRuntime(330)... 11もっと
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この混乱で読むことを管理する:) – MByD