我想从那里向数据库部分发送一个 json 数据我想在 listview 中显示数据，因为我的 json 部分是正确的，我创建了数据库也用于发送 json 数据以存储在该数据库中，但它显示 logcat 错误，应用程序也停了下来。
public class MainActivity extends Activity implements FetchDataListener,OnClickListener{
private static final int ACTIVITY_CREATE=0;
private static final int TAG_CATEGORY = 0;
private static final String CATEGORY_COLUMN_ID = "id";
private static final String CATEGORY_COLUMN_TITLE = "title";
private static final String CATEGORY_COLUMN_CONTENT = "content";
private static final String CATEGORY_COLUMN_COUNT = "count";
private static final int Application = 0;
private ProgressDialog dialog;
ListView lv;
ListView lv1;
private List<Application> items;
private Button btnGetSelected;
private Button praycount;
public int pct;
private String stringVal;
private TextView value;
private int prayers;
private int prayerid;
EditText myFilter;
ApplicationAdapter adapter;
private GinfyDbAdapter mDbHelper;
JSONArray contacts = null;
private SimpleCursorAdapter dataAdapter;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_item);
mDbHelper=new GinfyDbAdapter(MainActivity.this);
mDbHelper.open();
fillData();
registerForContextMenu(getListView());
//mDbHelper.saveCategoryRecord(new Category(id,title,content,count));
lv1 =(ListView)findViewById(R.id.list);
lv =(ListView)findViewById(R.id.list);
btnGetSelected = (Button) findViewById(R.id.btnget);
btnGetSelected.setOnClickListener(this);
myFilter = (EditText) findViewById(R.id.myFilter);
// Adding items to listview
/**
* Enabling Search Filter
* */
new GetDataAsyncTask().execute();
//praycount.setOnClickListener(this);
//initView();
}
private View getListView() {
// TODO Auto-generated method stub
return null;
}
/*private void initView(){
// show progress dialog
dialog = ProgressDialog.show(this, "", "Loading...");
String url = "http://www.ginfy.com/api/v1/posts.json";
FetchDataTask task = new FetchDataTask(this);
task.execute(url);
} */
private class GetDataAsyncTask extends AsyncTask<Void, Void, Boolean> {
private ProgressDialog Dialog = new ProgressDialog(MainActivity.this);
protected void onPreExecute() {
Dialog.setMessage("Loading.....");
Dialog.show();
}
@Override
protected void onPostExecute(Boolean result) {
super.onPostExecute(result);
Dialog.dismiss();
Intent intent = new Intent(MainActivity.this, MainActivity.class);
startActivity(intent);
}
@Override
protected Boolean doInBackground(Void... params) {
getProdData();
return null;
}
}
public void getProdData() {
// getting JSON string from URL
JSONParser jsonObject = new JSONParser();
//JSONObject jsonObject = new JSONObject();
//JSONArray aJson = jsonObject.getJSONArray("post");
String url = "http://www.ginfy.com/api/v1/posts.json";
// getting JSON string from URL
//JSONArray aJson = jsonObject.getJSONArray(url);
JSONArray Json = jsonObject.getJSONFromUrl(url);
try {
// Getting Array of Contacts
contacts = Json.getJSONArray(TAG_CATEGORY);
// looping through All Contacts
for(int i = 0; i < contacts.length(); i++){
JSONObject c = contacts.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(CATEGORY_COLUMN_ID);
String title = c.getString(CATEGORY_COLUMN_TITLE);
String content = c.getString(CATEGORY_COLUMN_CONTENT);
String count = c.getString(CATEGORY_COLUMN_COUNT);
mDbHelper.saveCategoryRecord(new Category(id,title,content,count));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
@SuppressLint("NewApi")
@SuppressWarnings("deprecation")
private void fillData() {
mDbHelper.open();
Cursor projectsCursor = mDbHelper.fetchAllProjects();
//startManagingCursor(projectsCursor);
// Create an array to specify the fields we want to display in the list (only TITLE)
String[] from = new String[]{GinfyDbAdapter.CATEGORY_COLUMN_TITLE, GinfyDbAdapter.CATEGORY_COLUMN_CONTENT, GinfyDbAdapter.CATEGORY_COLUMN_COUNT};
// and an array of the fields we want to bind those fields to (in this case just text1)
int[] to = new int[]{R.id.text2, R.id.text2, R.id.count};
/* Now create a simple cursor adapter and set it to display
SimpleCursorAdapter projects =
new SimpleCursorAdapter(this, R.layout.activity_row, projectsCursor, from, to);
setListAdapter(projects);
*/
// create the adapter using the cursor pointing to the desired data
//as well as the layout information
dataAdapter = new SimpleCursorAdapter(
this, R.layout.activity_row,
projectsCursor,
from,
to,
0);
setListAdapter(dataAdapter);
}
private void setListAdapter(SimpleCursorAdapter dataAdapter2) {
// TODO Auto-generated method stub
}
这是我的数据库部分
public class GridviewAdapter extends BaseAdapter
{
private ArrayList<String> listginfy;
private ArrayList<Integer> listimage;
private Activity activity;
public GridviewAdapter(GinfyActivity ginfyActivity,ArrayList<String> listginfy, ArrayList<Integer> listimage) {
super();
this.listginfy = listginfy;
this.listimage = listimage;
this.activity = (Activity) ginfyActivity;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return listginfy.size();
}
@Override
public String getItem(int position) {
// TODO Auto-generated method stub
return listginfy.get(position);
}
public int getItemId() {
// TODO Auto-generated method stub
return 0;
}
public static class ViewHolder
{
public ImageView imgViewGinfy;
public TextView txtViewTitle;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder view;
LayoutInflater inflator = activity.getLayoutInflater();
if(convertView==null)
{
view = new ViewHolder();
convertView = inflator.inflate(R.layout.gridview_row, null);
view.txtViewTitle = (TextView) convertView.findViewById(R.id.textView1);
view.imgViewGinfy = (ImageView) convertView.findViewById(R.id.imageView1);
convertView.setTag(view);
}
else
{
view = (ViewHolder) convertView.getTag();
}
view.txtViewTitle.setText(listginfy.get(position));
view.imgViewGinfy.setImageResource(listimage.get(position));
return convertView;
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return 0;
}
}
它显示 logcat 错误
07-04 11:01:47.825: E/SQLiteLog(1186): (1) near "prayers": syntax error
07-04 11:01:47.855: D/AndroidRuntime(1186): Shutting down VM
07-04 11:01:47.865: W/dalvikvm(1186): threadid=1: thread exiting with uncaught exception (group=0x40a70930)
07-04 11:01:47.975: E/AndroidRuntime(1186): FATAL EXCEPTION: main
07-04 11:01:47.975: E/AndroidRuntime(1186): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.jsonandroid/com.example.jsonandroid.MainActivity}: android.database.sqlite.SQLiteException: near "prayers": syntax error (code 1): , while compiling: prayers
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.app.ActivityThread.access$600(ActivityThread.java:141)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.os.Handler.dispatchMessage(Handler.java:99)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.os.Looper.loop(Looper.java:137)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.app.ActivityThread.main(ActivityThread.java:5039)
07-04 11:01:47.975: E/AndroidRuntime(1186): at java.lang.reflect.Method.invokeNative(Native Method)
07-04 11:01:47.975: E/AndroidRuntime(1186): at java.lang.reflect.Method.invoke(Method.java:511)
07-04 11:01:47.975: E/AndroidRuntime(1186): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
07-04 11:01:47.975: E/AndroidRuntime(1186): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
07-04 11:01:47.975: E/AndroidRuntime(1186): at dalvik.system.NativeStart.main(Native Method)
07-04 11:01:47.975: E/AndroidRuntime(1186): Caused by: android.database.sqlite.SQLiteException: near "prayers": syntax error (code 1): , while compiling: prayers
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:882)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:493)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1663)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1594)
07-04 11:01:47.975: E/AndroidRuntime(1186): at com.example.jsonandroid.GinfyDbAdapter$DatabaseHelper.onCreate(GinfyDbAdapter.java:63)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:252)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
07-04 11:01:47.975: E/AndroidRuntime(1186): at com.example.jsonandroid.GinfyDbAdapter.open(GinfyDbAdapter.java:99)
07-04 11:01:47.975: E/AndroidRuntime(1186): at com.example.jsonandroid.MainActivity.onCreate(MainActivity.java:66)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.app.Activity.performCreate(Activity.java:5104)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
07-04 11:01:47.975: E/AndroidRuntime(1186): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
07-04 11:01:47.975: E/AndroidRuntime(1186): ... 11 more
它在这三行中显示了问题
mDbHelper.open(); 和
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL(DATABASE_TABLE_PROJ + "( "
+ CATEGORY_COLUMN_ID + " INTEGER PRIMARY KEY, "
+ CATEGORY_COLUMN_TITLE + " TEXT, " + CATEGORY_COLUMN_CONTENT + " TEXT, " + CATEGORY_COLUMN_CONTENT + " INTEGER PRIMARY KEY )" );
}