listpreference エントリの割り当てに問題がある環境設定アクティビティを含むアプリケーションを作成しています。このアプリケーションはエミュレータで正常に動作しますが、モバイルでアプリケーションをテストすると、次のようなエラーが表示されます
FATAL EXCEPTION: main
java.lang.NullPointerException
at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:394)
at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362)
at android.widget.AbsListView.obtainView(AbsListView.java:2033)
この問題は、モバイルでそのリスト設定をクリックすると発生します。ここにこれが私のコードです
プリファレンス.xml
<PreferenceScreen
xmlns:android="http://schemas.android.com/apk/res/android">
<PreferenceCategory
android:title="@string/settings">
<ListPreference
android:key="@string/resolution"
android:title="@string/imageres"
android:summary="@string/summaryres"
android:dialogTitle="@string/resFormat"
/>
</PreferenceCategory>
</PreferenceScreen>
設定.java
package com.example;
import android.database.Cursor;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.PreferenceActivity;
public class Settings extends PreferenceActivity {
private SQLiteoperations SQLiteAdapter;
DTO get;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
get = (DTO) getIntent().getExtras().get("obj");
SQLiteAdapter = new SQLiteoperations(this);
SQLiteAdapter.openToWrite();
addPreferencesFromResource(R.xml.preferences);
ListPreference pref = (ListPreference) findPreference("resolution");
pref.setEntries(getEntries());
pref.setEntryValues(getEntries());
System.out.println("after set entries");
System.out.println(get.getDefaultvalues());
pref.setDefaultValue(get.getDefaultvalues());
}
private CharSequence[] getEntries() {
Cursor cursor = SQLiteAdapter.queueAll();
int num = cursor.getCount();
String[] size = new String[num];
System.out.println(cursor.getCount());
if (cursor.moveToFirst()){
int i=0;
do{
size[i]=new String(cursor.getString(1)+"X"+cursor.getString(2));
System.out.println(cursor.getString(1)+"X"+cursor.getString(2));
}while(cursor.moveToNext());
}
cursor.close();
return size;
}
}
camerademo.java
package com.example;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.Iterator;
import java.util.List;
import oracle.jdbc.OracleResultSet;
import oracle.sql.BLOB;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.PictureCallback;
import android.hardware.Camera.ShutterCallback;
import android.hardware.Camera.Size;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.TableRow.LayoutParams;
import android.widget.TextView;
public class CameraDemo extends Activity {
private final int DIALOG_LICENSE=5;
private final int MENU_SETTINGS=2;
private SharedPreferences settings;
private static final String TAG = "CameraDemo";
Camera camera;
Preview preview;
Button buttonClick,buttonSave,buttonBack;
byte[] image;
private static SQLiteoperations placeData;
final DTO set = new DTO();
String defsize;
// Called when the activity is first created.
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
placeData = new SQLiteoperations(this);
placeData.openToWrite();
preview = new Preview(this);
((FrameLayout) findViewById(R.id.preview)).addView(preview);
buttonSave = (Button) findViewById(R.id.Save);
buttonBack = (Button) findViewById(R.id.back);
buttonBack.setVisibility(View.INVISIBLE);
buttonSave.setVisibility(View.INVISIBLE);
buttonClick = (Button) findViewById(R.id.buttonClick);
settings = PreferenceManager.getDefaultSharedPreferences(this);
SharedPreferences licensPref = getSharedPreferences("PREFS", 0);
boolean licenseShown = licensPref.getBoolean("LicenseShown", false);
if(!licenseShown)
showDialog(DIALOG_LICENSE);
buttonClick.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
preview.camera.takePicture(shutterCallback, rawCallback,
jpegCallback);
buttonClick.setVisibility(View.INVISIBLE);
buttonSave.setVisibility(View.VISIBLE);
buttonBack.setVisibility(View.VISIBLE);
}
});
buttonBack.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
back();
}
});
buttonSave.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
save();
}
});
Log.d(TAG, "onCreate'd");
}
ShutterCallback shutterCallback = new ShutterCallback() {
public void onShutter() {
Log.d(TAG, "onShutter'd");
}
};
// Handles data for raw picture
PictureCallback rawCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
Log.d(TAG, "onPictureTaken - raw");
}
};
// Handles data for jpeg picture
PictureCallback jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
image = data;
}
};
@Override
protected void onPrepareDialog(int id, Dialog dialog) {
super.onPrepareDialog(id, dialog);
}
@Override
protected Dialog onCreateDialog(int id) {
switch(id){
case DIALOG_LICENSE:
return new AlertDialog.Builder(this)
.setTitle(R.string.welcome)
.setMessage(R.string.welcome_text)
.setPositiveButton(R.string.accept, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
settings = getSharedPreferences("PREFS", 0);
Parameters parameters = preview.camera.getParameters();
Size defaultsize = parameters.getPictureSize();
defsize = (new String(defaultsize.width+"X"+defaultsize.height));
List<Camera.Size> size = parameters.getSupportedPictureSizes();
int num = size.size();
String[] sizeArray = new String[num];
int i=0;
Iterator<Size> si = size.iterator();
while (si.hasNext()) {
Camera.Size sizeObj = (Size) si.next();
sizeArray[i]=new String(sizeObj.width+ "X" +sizeObj.height);
Log.e("size in licence dialog", sizeObj.height+"x"+sizeObj.width);
i++;
placeData.insert(String.valueOf(sizeObj.width),String.valueOf(sizeObj.height));
}
SharedPreferences.Editor editor = settings.edit();
editor.putBoolean("LicenseShown", true);
editor.commit();
}
})
.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
finish();
}
})
.setCancelable(false)
.create();
}
return null;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuItem mi;
mi = menu.add(0, MENU_SETTINGS, 0, R.string.settings);
mi.setIcon(android.R.drawable.ic_menu_preferences);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case MENU_SETTINGS:
set.setDefaultvalues(defsize);
Intent intent = new Intent(getApplicationContext(), Settings.class);
intent.putExtra("obj", set);
startActivity(intent);
return true;
}
return super.onOptionsItemSelected(item);
}
public void back(){
preview.camera.startPreview();
buttonBack.setVisibility(View.INVISIBLE);
buttonSave.setVisibility(View.INVISIBLE);
buttonClick.setVisibility(View.VISIBLE);
}
@Override
public void onDestroy(){
super.onDestroy();
if(preview.camera != null){
preview.camera.stopPreview();
preview.camera = null;
}
}
public void save(){
back();
}
}
誰が私が間違っているか教えてください。