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작업이라는 또 다른 활동을 시작할 때 오류 메시지가 나타납니다. . 응용 프로그램은 4 개 이미지 버튼이 (다른 버튼 이미지가 열려 제대로 나는 "TaskViewer"(ImageButton2)를 클릭하면 오류가 나타납니다불행히도 Organitza't (내 앱)가 중지되었습니다
열려고 활동 :. (ViewTask)
public class ViewTask extends Activity {
protected TaskerDbHelper db;
List<Task> list;
MyAdapter adapt;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_task);
db = new TaskerDbHelper(this);
list = db.getAllTasks();
adapt = new MyAdapter(this, R.layout.list_inner_view, list);
ListView listTask = (ListView) findViewById(R.id.listView1);
listTask.setAdapter(adapt);
}
public void addTaskNow(View v) {
EditText t = (EditText) findViewById(R.id.editText1);
String s = t.getText().toString();
if (s.equalsIgnoreCase("")) {
Toast.makeText(this, "enter the task description first!!",
Toast.LENGTH_LONG);
} else {
Task task = new Task(s, 0);
db.addTask(task);
Log.d("tasker", "data added");
t.setText("");
adapt.add(task);
adapt.notifyDataSetChanged();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_view_task, menu);
return true;
}
private class MyAdapter extends ArrayAdapter<Task> {
Context context;
List<Task> taskList = new ArrayList<Task>();
int layoutResourceId;
public MyAdapter(Context context, int layoutResourceId,
List<Task> objects) {
super(context, layoutResourceId, objects);
this.layoutResourceId = layoutResourceId;
this.taskList = objects;
this.context = context;
}
/**
* This method will DEFINe what the view inside the list view will
* finally look like Here we are going to code that the checkbox state
* is the status of task and check box text is the task name
*/
@Override
public View getView(int position, View convertView, ViewGroup parent) {
CheckBox chk = null;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.list_inner_view,
parent, false);
chk = (CheckBox) convertView.findViewById(R.id.chkStatus);
convertView.setTag(chk);
chk.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
CheckBox cb = (CheckBox) v;
Task changeTask = (Task) cb.getTag();
changeTask.setStatus(cb.isChecked() == true ? 1 : 0);
db.updateTask(changeTask);
Toast.makeText(
getApplicationContext(),
"Clicked on Checkbox: " + cb.getText() + " is "
+ cb.isChecked(), Toast.LENGTH_LONG)
.show();
}
});
} else {
chk = (CheckBox) convertView.getTag();
}
Task current = taskList.get(position);
chk.setText(current.getTaskName());
chk.setChecked(current.getStatus() == 1 ? true : false);
chk.setTag(current);
Log.d("listener", String.valueOf(current.getId()));
return convertView;
}
}
}
주요 활동
public class MainActivity extends Activity {
private Context activity;
@Override
protected void onCreate (Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
entrarboton();
}
private void entrarboton() {
ImageButton accionentrar = (ImageButton) findViewById(R.id.imageButton0);
accionentrar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent LaunchIntent = getPackageManager().getLaunchIntentForPackage("com.android.calendar");
startActivity(LaunchIntent);
}
});
ImageButton accionentrar2 = (ImageButton) findViewById(R.id.imageButton3);
accionentrar2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this,Notes.class));
}
});
ImageButton accionentrar3 = (ImageButton) findViewById(R.id.imageButton2);
accionentrar3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this,ViewTask.class));
}
});
ImageButton accionentrar4 = (ImageButton) findViewById(R.id.imageButton4);
accionentrar4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this,Altres.class));
}
});
AutoCompleteTextView auto = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView);
String[] noms = getResources() . getStringArray(R.array.noms_array);
ArrayAdapter<String> adapter;
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, noms);
auto.setThreshold(1);
auto.setAdapter(adapter);
}
}
안드로이드 매니페스트 :
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.dppalvaplicacio.app.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.dppalvaplicacio.app.Calendari"
android:label="@string/title_activity_calendari" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name="com.dppalvaplicacio.app.Notes"
android:label="@string/title_activity_notes" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name="com.dppalvaplicacio.app.ViewTask"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name="com.dppalvaplicacio.app.Altres"
android:label="@string/title_activity_altres" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
로그 캣
Caused by: java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase: /data/data/com.dppalvaplicacio.app/databases/taskerManager
at android.database.sqlite.SQLiteClosable.acquireReference(SQLiteClosable.java:55)
at android.database.sqlite.SQLiteDatabase.endTransaction(SQLiteDatabase.java:520)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:263)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
at com.dppalvaplicacio.app.TaskerDbHelper.getAllTasks(TaskerDbHelper.java:70)
at com.dppalvaplicacio.app.ViewTask.onCreate(ViewTask.java:33)
at android.app.Activity.performCreate(Activity.java:5008)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
at android.app.ActivityThread.access$600(ActivityThread.java:130)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
public class TaskerDbHelper extends SQLiteOpenHelper { private static final int DATABASE_VERSION = 1; // Database Name private static final String DATABASE_NAME = "taskerManager"; // tasks table name private static final String TABLE_TASKS = "tasks"; // tasks Table Columns names private static final String KEY_ID = "id"; private static final String KEY_TASKNAME = "taskName"; private static final String KEY_STATUS = "status"; public TaskerDbHelper(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); } @Override public void onCreate(SQLiteDatabase db) { String sql = "CREATE TABLE IF NOT EXISTS " + TABLE_TASKS + " (" + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_TASKNAME + " TEXT, " + KEY_STATUS + " INTEGER)"; db.execSQL(sql); db.close(); } @Override public void onUpgrade(SQLiteDatabase db, int oldV, int newV) { // Drop older table if existed db.execSQL("DROP TABLE IF EXISTS " + TABLE_TASKS); // Create tables again onCreate(db); } // Adding new task public void addTask(Task task) { SQLiteDatabase db = this.getWritableDatabase(); ContentValues values = new ContentValues(); values.put(KEY_TASKNAME, task.getTaskName()); // task name // status of task- can be 0 for not done and 1 for done values.put(KEY_STATUS, task.getStatus()); // Inserting Row db.insert(TABLE_TASKS, null, values); db.close(); // Closing database connection } public List<Task> getAllTasks() { List<Task> taskList = new ArrayList<Task>(); // Select All Query String selectQuery = "SELECT * FROM " + TABLE_TASKS; SQLiteDatabase db = this.getWritableDatabase(); Cursor cursor = db.rawQuery(selectQuery, null); // looping through all rows and adding to list if (cursor.moveToFirst()) { do { Task task = new Task(); task.setId(cursor.getInt(0)); task.setTaskName(cursor.getString(1)); task.setStatus(cursor.getInt(2)); // Adding contact to list taskList.add(task); } while (cursor.moveToNext()); } // return task list return taskList; } public void updateTask(Task task) { // updating row SQLiteDatabase db = this.getWritableDatabase(); ContentValues values = new ContentValues(); values.put(KEY_TASKNAME, task.getTaskName()); values.put(KEY_STATUS, task.getStatus()); db.update(TABLE_TASKS, values, KEY_ID + " = ?",new String[] {String.valueOf(task.getId())}); db.close(); } TaskDbHelper
}
문제는 TaskerDbHelper.java:70입니다. 수업을 게시하십시오. – StarsSky
오류는 TaskDBHelper에 있습니다. 제발 코드를 게시하십시오 (나는 문제가있을 수있는 좋은 생각이있어) –
오류가 명확하게 닫힌 데이터베이스를 열고 있다고 말합니다 – sanket