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アンドロイドでアプリを作ってもうまくいきましたが、私のアプリをメインアプリに移したとき、その時点からのエラーを表示するようになりましたパッケージ名は以前のアプリのものと同じですこれは私が得ているエラーです。私は多くの質問に従いましたが、解決策を見つけることができません。実行時例外がアクティビティを開始できません
FATAL EXCEPTION: main
Process: unnion.neelay.beatbox, PID: 12739
java.lang.RuntimeException: Unable to start activity ComponentInfo{unnion.neelay.beatbox/unnion.neelay.beatbox.ringdroid.RingdroidSelectActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2423)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2483)
at android.app.ActivityThread.access$900(ActivityThread.java:153)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1349)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5441)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:738)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:628)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
at unnion.neelay.beatbox.ringdroid.RingdroidSelectActivity.onCreate(RingdroidSelectActivity.java:123)
at android.app.Activity.performCreate(Activity.java:6303)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2376)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2483)
at android.app.ActivityThread.access$900(ActivityThread.java:153)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1349)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5441)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:738)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:628)
nullポイント例外を表示していますが、メインアプリケーションに追加されていないと正常に動作していました。あなたのコールスタックを見て Ringdroidでは選択活動
public class RingdroidSelectActivity
extends ListActivity
implements LoaderManager.LoaderCallbacks<Cursor> {
private SearchView mFilter;
private SimpleCursorAdapter mAdapter;
private boolean mWasGetContentIntent;
private boolean mShowAll;
private Cursor mExternalCursor;
// Result codes
private static final int EXT_STORAGE_PERMISSION_REQ_CODE = 2;
private static final int WRITE_EXTERNAL_STORAGE = 4;
private static final int READ_PHONE_STATE = 3;
private static final int WRITE_SETTINGS = 3;
private static final int CHANGE_CONFIGURATION = 1;
private static final int MODIFY_AUDIO_SETTINGS = 5;
private static final int INTERNET = 6;
private static final int REQUEST_CODE_EDIT = 1;
private static final int REQUEST_CODE_CHOOSE_CONTACT = 2;
// Context menu
private static final int CMD_EDIT = 4;
private static final int CMD_DELETE = 5;
private static final int CMD_SET_AS_DEFAULT = 6;
private static final int CMD_SET_AS_CONTACT = 7;
public RingdroidSelectActivity() {
}
/**
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
checkReadStoragePermission();
mShowAll = false;
String status = Environment.getExternalStorageState();
if (status.equals(Environment.MEDIA_MOUNTED_READ_ONLY)) {
showFinalAlert(getResources().getText(R.string.sdcard_readonly));
return;
}
if (status.equals(Environment.MEDIA_SHARED)) {
showFinalAlert(getResources().getText(R.string.sdcard_shared));
return;
}
if (!status.equals(Environment.MEDIA_MOUNTED)) {
showFinalAlert(getResources().getText(R.string.no_sdcard));
return;
}
Intent intent = getIntent();
mWasGetContentIntent = intent.getAction().equals(
Intent.ACTION_GET_CONTENT);
// Inflate our UI from its XML layout description.
setContentView(R.layout.media_select);
getActionBar().setIcon(new ColorDrawable(getResources().getColor(android.R.color.transparent)));
getActionBar().setDisplayShowTitleEnabled(false);
try {
mAdapter = new SimpleCursorAdapter(
this,
// Use a template that displays a text view
R.layout.media_select_row,
null,
// Map from database columns...
new String[]{
MediaStore.Audio.Media.ARTIST,
MediaStore.Audio.Media.TITLE,
MediaStore.Audio.Media._ID,
MediaStore.Audio.Media._ID},
// To widget ids in the row layout...
new int[]{
R.id.row_artist,
R.id.row_title,
R.id.row_icon,
R.id.row_options_button},
0);
setListAdapter(mAdapter);
// Normal click - open the editor
getListView().setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent,
View view,
int position,
long id) {
startRingdroidEditor();
}
});
mExternalCursor = null;
getLoaderManager().initLoader(EXTERNAL_CURSOR_ID, null, this);
} catch (SecurityException e) {
// No permission to retrieve audio?
Log.e("Ringdroid", e.toString());
// TODO error 1
} catch (IllegalArgumentException e) {
// No permission to retrieve audio?
Log.e("Ringdroid", e.toString());
// TODO error 2
}
mAdapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {
public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
if (view.getId() == R.id.row_options_button) {
// Get the arrow ImageView and set the onClickListener to open the context menu.
ImageView iv = (ImageView) view;
iv.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
openContextMenu(v);
}
});
return true;
} else if (view.getId() == R.id.row_icon) {
setSoundIconFromCursor((ImageView) view, cursor);
return true;
}
return false;
}
});
// Long-press opens a context menu
registerForContextMenu(getListView());
}
private void setSoundIconFromCursor(ImageView view, Cursor cursor) {
if (0 != cursor.getInt(cursor.getColumnIndexOrThrow(
MediaStore.Audio.Media.IS_MUSIC))) {
view.setImageResource(R.drawable.type_music);
((View) view.getParent()).setBackgroundColor(
getResources().getColor(R.color.type_bkgnd_music));
}
String filename = cursor.getString(cursor.getColumnIndexOrThrow(
MediaStore.Audio.Media.DATA));
}
/**
* Called with an Activity we started with an Intent returns.
*/
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent dataIntent) {
if (requestCode != REQUEST_CODE_EDIT) {
return;
}
if (resultCode != RESULT_OK) {
return;
}
setResult(RESULT_OK, dataIntent);
//finish(); // TODO(nfaralli): why would we want to quit the app here?
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.select_options, menu);
mFilter = (SearchView) menu.findItem(R.id.action_search_filter).getActionView();
if (mFilter != null) {
mFilter.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
public boolean onQueryTextChange(String newText) {
refreshListView();
return true;
}
public boolean onQueryTextSubmit(String query) {
refreshListView();
return true;
}
});
}
return true;
}
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
menu.findItem(R.id.action_record).setVisible(true);
// TODO(nfaralli): do we really need a "Show all audio" item now?
menu.findItem(R.id.action_show_all_audio).setVisible(true);
menu.findItem(R.id.action_show_all_audio).setEnabled(!mShowAll);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_record:
onRecord();
return true;
case R.id.action_show_all_audio:
mShowAll = true;
refreshListView();
return true;
default:
return false;
}
}
@Override
public void onCreateContextMenu(ContextMenu menu,
View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
Cursor c = mAdapter.getCursor();
String title = c.getString(c.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE));
menu.setHeaderTitle(title);
menu.add(0, CMD_EDIT, 0, R.string.context_menu_edit);
menu.add(0, CMD_DELETE, 0, R.string.context_menu_delete);
// Add items to the context menu item based on file type
if (0 != c.getInt(c.getColumnIndexOrThrow(MediaStore.Audio.Media.IS_RINGTONE))) {
menu.add(0, CMD_SET_AS_DEFAULT, 0, R.string.context_menu_default_ringtone);
menu.add(0, CMD_SET_AS_CONTACT, 0, R.string.context_menu_contact);
} else if (0 != c.getInt(c.getColumnIndexOrThrow(MediaStore.Audio.Media.IS_NOTIFICATION))) {
menu.add(0, CMD_SET_AS_DEFAULT, 0, R.string.context_menu_default_notification);
}
}
@Override
public boolean onContextItemSelected(MenuItem item) {
switch (item.getItemId()) {
case CMD_EDIT:
startRingdroidEditor();
return true;
case CMD_DELETE:
confirmDelete();
return true;
case CMD_SET_AS_DEFAULT:
setAsDefaultRingtoneOrNotification();
return true;
case CMD_SET_AS_CONTACT:
return chooseContactForRingtone(item);
default:
return super.onContextItemSelected(item);
}
}
private void setAsDefaultRingtoneOrNotification() {
Cursor c = mAdapter.getCursor();
// If the item is a ringtone then set the default ringtone,
// otherwise it has to be a notification so set the default notification sound
if (0 != c.getInt(c.getColumnIndexOrThrow(MediaStore.Audio.Media.IS_RINGTONE))) {
RingtoneManager.setActualDefaultRingtoneUri(
RingdroidSelectActivity.this,
RingtoneManager.TYPE_RINGTONE,
getUri());
Toast.makeText(
RingdroidSelectActivity.this,
R.string.default_ringtone_success_message,
Toast.LENGTH_SHORT)
.show();
} else {
RingtoneManager.setActualDefaultRingtoneUri(
RingdroidSelectActivity.this,
RingtoneManager.TYPE_NOTIFICATION,
getUri());
Toast.makeText(
RingdroidSelectActivity.this,
R.string.default_notification_success_message,
Toast.LENGTH_SHORT)
.show();
}
}
private int getUriIndex(Cursor c) {
int uriIndex;
String[] columnNames = {
MediaStore.Audio.Media.INTERNAL_CONTENT_URI.toString(),
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI.toString()
};
for (String columnName : Arrays.asList(columnNames)) {
uriIndex = c.getColumnIndex(columnName);
if (uriIndex >= 0) {
return uriIndex;
}
// On some phones and/or Android versions, the column name includes the double quotes.
uriIndex = c.getColumnIndex("\"" + columnName + "\"");
if (uriIndex >= 0) {
return uriIndex;
}
}
return -1;
}
private Uri getUri() {
//Get the uri of the item that is in the row
Cursor c = mAdapter.getCursor();
int uriIndex = getUriIndex(c);
if (uriIndex == -1) {
return null;
}
String itemUri = c.getString(uriIndex) + "/" +
c.getString(c.getColumnIndexOrThrow(MediaStore.Audio.Media._ID));
return (Uri.parse(itemUri));
}
private boolean chooseContactForRingtone(MenuItem item) {
try {
//Go to the choose contact activity
Intent intent = new Intent(Intent.ACTION_EDIT, getUri());
intent.setClassName(
"unnion.neelay.beatbox.ringdroid",
"unnion.neelay.beatbox.ringdroid.ChooseContactActivity");
startActivityForResult(intent, REQUEST_CODE_CHOOSE_CONTACT);
} catch (Exception e) {
Log.e("Ringdroid", "Couldn't open Choose Contact window");
}
return true;
}
private void confirmDelete() {
// See if the selected list item was created by Ringdroid to
// determine which alert message to show
Cursor c = mAdapter.getCursor();
String artist = c.getString(c.getColumnIndexOrThrow(
MediaStore.Audio.Media.ARTIST));
CharSequence ringdroidArtist =
getResources().getText(R.string.artist_name);
CharSequence message;
if (artist.equals(ringdroidArtist)) {
message = getResources().getText(
R.string.confirm_delete_ringdroid);
} else {
message = getResources().getText(
R.string.confirm_delete_non_ringdroid);
}
CharSequence title;
if (0 != c.getInt(c.getColumnIndexOrThrow(
MediaStore.Audio.Media.IS_RINGTONE))) {
title = getResources().getText(R.string.delete_ringtone);
} else if (0 != c.getInt(c.getColumnIndexOrThrow(
MediaStore.Audio.Media.IS_ALARM))) {
title = getResources().getText(R.string.delete_alarm);
} else if (0 != c.getInt(c.getColumnIndexOrThrow(
MediaStore.Audio.Media.IS_NOTIFICATION))) {
title = getResources().getText(R.string.delete_notification);
} else if (0 != c.getInt(c.getColumnIndexOrThrow(
MediaStore.Audio.Media.IS_MUSIC))) {
title = getResources().getText(R.string.delete_music);
} else {
title = getResources().getText(R.string.delete_audio);
}
new AlertDialog.Builder(RingdroidSelectActivity.this)
.setTitle(title)
.setMessage(message)
.setPositiveButton(
R.string.delete_ok_button,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
onDelete();
}
})
.setNegativeButton(
R.string.delete_cancel_button,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
}
})
.setCancelable(true)
.show();
}
private void onDelete() {
Cursor c = mAdapter.getCursor();
int dataIndex = c.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
String filename = c.getString(dataIndex);
int uriIndex = getUriIndex(c);
if (uriIndex == -1) {
showFinalAlert(getResources().getText(R.string.delete_failed));
return;
}
if (!new File(filename).delete()) {
showFinalAlert(getResources().getText(R.string.delete_failed));
}
String itemUri = c.getString(uriIndex) + "/" +
c.getString(c.getColumnIndexOrThrow(MediaStore.Audio.Media._ID));
getContentResolver().delete(Uri.parse(itemUri), null, null);
}
private void showFinalAlert(CharSequence message) {
new AlertDialog.Builder(RingdroidSelectActivity.this)
.setTitle(getResources().getText(R.string.alert_title_failure))
.setMessage(message)
.setPositiveButton(
R.string.alert_ok_button,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
finish();
}
})
.setCancelable(false)
.show();
}
private void onRecord() {
try {
Intent intent = new Intent(Intent.ACTION_EDIT, Uri.parse("record"));
intent.putExtra("was_get_content_intent", mWasGetContentIntent);
intent.setClassName("unnion.neelay.mediaplayer.ringdroid", "unnion.neelay.mediaplayer.ringdroid.RingdroidEditActivity");
startActivityForResult(intent, REQUEST_CODE_EDIT);
} catch (Exception e) {
Log.e("Ringdroid", "Couldn't start editor");
}
}
private void startRingdroidEditor() {
Cursor c = mAdapter.getCursor();
int dataIndex = c.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
String filename = c.getString(dataIndex);
try {
Intent intent = new Intent(Intent.ACTION_EDIT, Uri.parse(filename));
intent.putExtra("was_get_content_intent", mWasGetContentIntent);
intent.setClassName("unnion.neelay.mediaplayer.ringdroid", "unnion.neelay.mediaplayer.ringdroid.RingdroidEditActivity");
startActivityForResult(intent, REQUEST_CODE_EDIT);
} catch (Exception e) {
Log.e("Ringdroid", "Couldn't start editor");
}
}
private void refreshListView() {
mExternalCursor = null;
Bundle args = new Bundle();
args.putString("filter", mFilter.getQuery().toString());
getLoaderManager().restartLoader(EXTERNAL_CURSOR_ID, args, this);
}
private static final String[] EXTERNAL_COLUMNS = new String[]{
MediaStore.Audio.Media._ID,
MediaStore.Audio.Media.DATA,
MediaStore.Audio.Media.TITLE,
MediaStore.Audio.Media.ARTIST,
MediaStore.Audio.Media.ALBUM,
MediaStore.Audio.Media.IS_RINGTONE,
MediaStore.Audio.Media.IS_ALARM,
MediaStore.Audio.Media.IS_NOTIFICATION,
MediaStore.Audio.Media.IS_MUSIC,
"\"" + MediaStore.Audio.Media.EXTERNAL_CONTENT_URI + "\""
};
private static final int EXTERNAL_CURSOR_ID = 1;
/* Implementation of LoaderCallbacks.onCreateLoader */
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
ArrayList<String> selectionArgsList = new ArrayList<String>();
String selection;
Uri baseUri;
String[] projection;
switch (id) {
case EXTERNAL_CURSOR_ID:
baseUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
projection = EXTERNAL_COLUMNS;
break;
default:
return null;
}
if (mShowAll) {
selection = "(_DATA LIKE ?)";
selectionArgsList.add("%");
} else {
selection = "(";
for (String extension : SoundFile.getSupportedExtensions()) {
selectionArgsList.add("%." + extension);
if (selection.length() > 1) {
selection += " OR ";
}
selection += "(_DATA LIKE ?)";
}
selection += ")";
selection = "(" + selection + ") AND (_DATA NOT LIKE ?)";
selectionArgsList.add("%espeak-data/scratch%");
}
String filter = args != null ? args.getString("filter") : null;
if (filter != null && filter.length() > 0) {
filter = "%" + filter + "%";
selection =
"(" + selection + " AND " +
"((TITLE LIKE ?) OR (ARTIST LIKE ?) OR (ALBUM LIKE ?)))";
selectionArgsList.add(filter);
selectionArgsList.add(filter);
selectionArgsList.add(filter);
}
String[] selectionArgs =
selectionArgsList.toArray(new String[selectionArgsList.size()]);
return new CursorLoader(
this,
baseUri,
projection,
selection,
selectionArgs,
MediaStore.Audio.Media.DEFAULT_SORT_ORDER
);
}
/* Implementation of LoaderCallbacks.onLoadFinished */
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
switch (loader.getId()) {
case EXTERNAL_CURSOR_ID:
mExternalCursor = data;
break;
default:
return;
}
// TODO: should I use a mutex/synchronized block here?
if (mExternalCursor != null) {
Cursor mergeCursor = new MergeCursor(new Cursor[]{mExternalCursor});
mAdapter.swapCursor(mergeCursor);
}
}
/* Implementation of LoaderCallbacks.onLoaderReset */
@Override
public void onLoaderReset(Loader<Cursor> loader) {
// This is called when the last Cursor provided to onLoadFinished()
// above is about to be closed. We need to make sure we are no
// longer using it.
mAdapter.swapCursor(null);
}
@TargetApi(Build.VERSION_CODES.M)
private void checkReadStoragePermission() {
if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this, android.Manifest.permission.READ_EXTERNAL_STORAGE)) {
DialogInterface.OnClickListener onClickListener = new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (which == DialogInterface.BUTTON_POSITIVE) {
ActivityCompat.requestPermissions(RingdroidSelectActivity.this, new String[]{android.Manifest.permission.READ_EXTERNAL_STORAGE}, EXT_STORAGE_PERMISSION_REQ_CODE);
} else if (which == DialogInterface.BUTTON_NEGATIVE) {
onPermissionsNotGranted();
}
dialog.dismiss();
finish();
startActivity(getIntent());
}
};
new android.support.v7.app.AlertDialog.Builder(this)
.setTitle(R.string.permissions_title)
.setMessage(R.string.read_ext_permissions_message)
.setPositiveButton(R.string.btn_continue, onClickListener)
.setNegativeButton(R.string.btn_cancel, onClickListener)
.setCancelable(false)
.show();
return;
}
ActivityCompat.requestPermissions(RingdroidSelectActivity.this, new String[]{android.Manifest.permission.READ_EXTERNAL_STORAGE, android.Manifest.permission.READ_PHONE_STATE}, EXT_STORAGE_PERMISSION_REQ_CODE);
return;
}
}
private void onPermissionsNotGranted() {
Toast.makeText(this, R.string.toast_permissions_not_granted, Toast.LENGTH_SHORT).show();
Log.v("tom", "JERRY");
}
}
ありでしたか？ –