ここで何が起こったのかわかりません。長押ししたときに電話を振動させるステートメントを追加していました。ステートメントを間違った場所に置いたところ、電話が継続的に振動していました。だから私は電話のプラグを抜いて電源を切りました。次に、電話でこれを実行する原因となったコードを削除しました。次に、コードを追加する前の状態でアプリを再起動しようとしましたが、これを取得しました。コードは動作していたときとまったく同じであるため、何が起こったのかわかりません。キャッシュされたファイルがこれを引き起こしている可能性がありますか？
これが私のlogcatです：
10-28 17:34:51.381: W/dalvikvm(718): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
10-28 17:34:51.389: E/AndroidRuntime(718): FATAL EXCEPTION: main
10-28 17:34:51.389: E/AndroidRuntime(718): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.almyz125.stamp/com.almyz125.stamp.Map}: java.lang.NullPointerException
10-28 17:34:51.389: E/AndroidRuntime(718): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
10-28 17:34:51.389: E/AndroidRuntime(718): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
10-28 17:34:51.389: E/AndroidRuntime(718): at android.app.ActivityThread.access$600(ActivityThread.java:130)
10-28 17:34:51.389: E/AndroidRuntime(718): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
10-28 17:34:51.389: E/AndroidRuntime(718): at android.os.Handler.dispatchMessage(Handler.java:99)
10-28 17:34:51.389: E/AndroidRuntime(718): at android.os.Looper.loop(Looper.java:137)
10-28 17:34:51.389: E/AndroidRuntime(718): at android.app.ActivityThread.main(ActivityThread.java:4745)
10-28 17:34:51.389: E/AndroidRuntime(718): at java.lang.reflect.Method.invokeNative(Native Method)
10-28 17:34:51.389: E/AndroidRuntime(718): at java.lang.reflect.Method.invoke(Method.java:511)
10-28 17:34:51.389: E/AndroidRuntime(718): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
10-28 17:34:51.389: E/AndroidRuntime(718): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-28 17:34:51.389: E/AndroidRuntime(718): at dalvik.system.NativeStart.main(Native Method)
10-28 17:34:51.389: E/AndroidRuntime(718): Caused by: java.lang.NullPointerException
10-28 17:34:51.389: E/AndroidRuntime(718): at com.almyz125.stamp.Map.onCreate(Map.java:88)
10-28 17:34:51.389: E/AndroidRuntime(718): at android.app.Activity.performCreate(Activity.java:5008)
10-28 17:34:51.389: E/AndroidRuntime(718): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
10-28 17:34:51.389: E/AndroidRuntime(718): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
10-28 17:34:51.389: E/AndroidRuntime(718): ... 11 more
これが私のコードでもあります：
public class Map extends MapActivity implements LocationListener {
// variable for determining long press and then automatically adding a pin
// to the map
private int minMillisecondThresholdForLongClick = 800;
private long startTimeForLongClick = 0;
private float xScreenCoordinateForLongClick;
private float yScreenCoordinateForLongClick;
private float xtolerance = 10;// x pixels that your finger can be off but
// still constitute a long press
private float ytolerance = 10;// y pixels that your finger can be off but
// still constitute a long press
private float xlow; // actual screen coordinate when you subtract the
// tolerance
private float xhigh; // actual screen coordinate when you add the tolerance
private float ylow; // actual screen coordinate when you subtract the
// tolerance
private float yhigh; // actual screen coordinate when you add the tolerance
// Variables
MapView mapView;
MapController mc;
long start;
long stop;
int x, y, longTemp, latTemp;
GeoPoint touchPoint;
LocationManager lm;
Drawable d;
Location lastKnownLoc;
List<Overlay> mapoverlays;
GeoPoint gp;
private MyLocationOverlay myLocOverlay, compass;
// Auto Generated Methods
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// sets view to map
setContentView(R.layout.main);
mapView = (MapView) findViewById(R.id.mvMain);
mc = mapView.getController();
compass = new MyLocationOverlay(Map.this, mapView);
d = getResources().getDrawable(R.drawable.icon);
mapoverlays = mapView.getOverlays();
myLocOverlay = new MyLocationOverlay(this, mapView);
mapoverlays = mapView.getOverlays();
lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
lastKnownLoc = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
longTemp = (int) (lastKnownLoc.getLongitude() * 1e6);
latTemp = (int) (lastKnownLoc.getLatitude() * 1e6);
gp = new GeoPoint(latTemp, longTemp);
// enables on screen zoom buttons
mapView.setBuiltInZoomControls(true);
// create overlay that shows our location
// add this overlay to the map and refresh it
mapView.getOverlays().add(myLocOverlay);
mapView.invalidate();
mapoverlays.add(compass);
compass.enableMyLocation();
compass.enableCompass();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
// return super.onCreateOptionsMenu(menu);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.options, menu);
return true;
}
@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
// handle on menu item selected here
super.onMenuItemSelected(featureId, item);
// if item is selected satellite view is toggled
if (item.getItemId() == R.id.opt_tog_view) {
toggleSat();
}
return true;
}
// method to toggles satellite view called in option menu
public void toggleSat() {
if (mapView.isSatellite()) {
mapView.setSatellite(false);
} else {
mapView.setSatellite(true);
}
}
// Volume keys zoom in and out.
public boolean onKeyDown(int keyCode, KeyEvent event) {
mc = mapView.getController();
switch (keyCode) {
case KeyEvent.KEYCODE_VOLUME_UP:
mc.zoomIn();
break;
case KeyEvent.KEYCODE_VOLUME_DOWN:
mc.zoomOut();
break;
}
return super.onKeyDown(keyCode, event);
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
compass.disableMyLocation();
compass.disableCompass();
myLocOverlay.disableMyLocation();
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
gp = new GeoPoint(latTemp, longTemp);
myLocOverlay.enableMyLocation();
compass.enableMyLocation();
compass.enableCompass();
mapoverlays.add(compass);
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
}
@Override
public void onProviderDisabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
// TODO Auto-generated method stub
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
/*
* We want to capture the place the user long pressed on the map and add
* a marker (pin) on the map at that lat/long. This solution: 1. Allows
* you to set the time threshold for what constitutes a long press 2.
* Doesn't get fooled by scrolling, multi-touch, or non-multi-touch
* events
*
* Thank you Roger Kind Kristiansen for the main idea
*/
// get the action from the MotionEvent: down, move, or up
int actionType = ev.getAction();
if (actionType == MotionEvent.ACTION_DOWN) {
// user pressed the button down so let's initialize the main
// variables that we care about:
// later on when the "Action Up" event fires, the "DownTime" should
// match the "startTimeForLongClick" that we set here
// the coordinate on the screen should not change much during the
// long press
startTimeForLongClick = ev.getEventTime();
xScreenCoordinateForLongClick = ev.getX();
yScreenCoordinateForLongClick = ev.getY();
} else if (actionType == MotionEvent.ACTION_MOVE) {
// For non-long press actions, the move action can happen a lot
// between ACTION_DOWN and ACTION_UP
if (ev.getPointerCount() > 1) {
// easiest way to detect a multi-touch even is if the pointer
// count is greater than 1
// next thing to look at is if the x and y coordinates of the
// person's finger change.
startTimeForLongClick = 0; // instead of a timer, just reset
// this class variable and in our
// ACTION_UP event, the DownTime
// value will not match and so we
// can reset.
} else {
// I know that I am getting to the same action as above,
// startTimeForLongClick=0, but I want the processor
// to quickly skip over this step if it detects the pointer
// count > 1 above
float xmove = ev.getX(); // where is their finger now?
float ymove = ev.getY();
// these next four values allow you set a tiny box around their
// finger in case
// they don't perfectly keep their finger still on a long click.
xlow = xScreenCoordinateForLongClick - xtolerance;
xhigh = xScreenCoordinateForLongClick + xtolerance;
ylow = yScreenCoordinateForLongClick - ytolerance;
yhigh = yScreenCoordinateForLongClick + ytolerance;
if ((xmove < xlow || xmove > xhigh)
|| (ymove < ylow || ymove > yhigh)) {
// out of the range of an acceptable long press, reset the
// whole process
startTimeForLongClick = 0;
}
}
} else if (actionType == MotionEvent.ACTION_UP) {
// determine if this was a long click:
long eventTime = ev.getEventTime();
long downTime = ev.getDownTime(); // this value will match the
// startTimeForLongClick
// variable as long as we didn't
// reset the
// startTimeForLongClick
// variable because we detected
// nonsense that invalidated a
// long press in the ACTION_MOVE
// block
// make sure the start time for the original "down event" is the
// same as this event's "downTime"
if (startTimeForLongClick == downTime) {
// see if the event time minus the start time is within the
// threshold
if ((eventTime - startTimeForLongClick) > minMillisecondThresholdForLongClick) {
// make sure we are at the same spot where we started the
// long click
float xup = ev.getX();
float yup = ev.getY();
// I don't want the overhead of a function call:
xlow = xScreenCoordinateForLongClick - xtolerance;
xhigh = xScreenCoordinateForLongClick + xtolerance;
ylow = yScreenCoordinateForLongClick - ytolerance;
yhigh = yScreenCoordinateForLongClick + ytolerance;
if ((xup > xlow && xup < xhigh)
&& (yup > ylow && yup < yhigh)) {
// **** safe to process your code for an actual long
// press ****
// comment out these next rows after you confirm in
// logcat that the long press works
long totaltime = eventTime - startTimeForLongClick;
String strtotaltime = Long.toString(totaltime);
Log.d("long press detected: ", strtotaltime);
// Below is code from my touchy class
x = (int) ev.getX();
y = (int) ev.getY();
touchPoint = mapView.getProjection().fromPixels(x, y);
Builder alert = new AlertDialog.Builder(Map.this);
alert.setTitle("Pick an option.");
alert.setNeutralButton("Place a marker",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
OverlayItem overlayItem = new OverlayItem(
touchPoint, "What's up",
"2nd String");
Mark custom = new Mark(d, Map.this);
custom.dropMarker(overlayItem);
mapoverlays.add(custom);
}
});
alert.setPositiveButton("Get Address",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
Geocoder geocoder = new Geocoder(
getBaseContext(), Locale
.getDefault());
try {
List<Address> address = geocoder.getFromLocation(
touchPoint.getLatitudeE6() / 1E6,
touchPoint.getLongitudeE6() / 1E6,
1);
if (address.size() > 0) {
String display = "";
for (int i = 0; i < address
.get(0)
.getMaxAddressLineIndex(); i++) {
display += address.get(0)
.getAddressLine(i)
+ "\n";
}
Toast t = Toast.makeText(
getBaseContext(),
display,
Toast.LENGTH_LONG);
t.show();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
}
}
});
alert.show();
}
}
}
}
return super.dispatchTouchEvent(ev) && true;
}
}
これが私のマニフェストです：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.almyz125.stamp" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<application
android:icon="@drawable/icon"
android:label="@string/activity_main_map" >
<uses-library android:name="com.google.android.maps" />
<activity
android:name="com.almyz125.stamp.Map"
android:label="STAMP" >
<intent-filter>
<category android:name="android.intent.category.LAUNCHER" >
</category>
<action android:name="android.intent.action.MAIN" >
</action>
</intent-filter>
</activity>
</application>
</manifest>