написал приложение список задач по туториалу. Задачи добавляются при клике на пункт меню(иконка плюса справа вверху)
Как сделать,чтобы новая задача добавлялась не по клику на пункт меню, а на мою кастомную кнопку?
Разметку кнопки я сделал, а вот как повесить метод,который бы всё это реализовывал?
Main_menu.xml:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/action_add_task"
android:icon="@drawable/add_item"
android:title="@string/add_task"
app:showAsAction="always"
/>
</menu>
item_todo.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_vertical">
<TextView
android:id="@+id/task_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:text="@string/hi"
android:textSize="20sp" />
<Button
android:id="@+id/task_delete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:onClick="deleteTask"
android:text="@string/done" />
</RelativeLayout>
activity_main:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ListView
android:id="@+id/list_todo"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ListView>
<Button
android:id="@+id/btnAdd"
android:layout_width="65dp"
android:layout_height="65dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_margin="20dp"
android:background="@drawable/circle"
/>
</RelativeLayout>
класс MainActivity:
package com.kentforth.list5;
import android.content.ContentValues;
import android.content.DialogInterface;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private TaskHelper mHelper;
private ListView mTaskListView;
private ArrayAdapter<String> mAdapter;
Button btnAdd;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mHelper = new TaskHelper(this);
mTaskListView = (ListView) findViewById(R.id.list_todo);
btnAdd = (Button) findViewById(R.id.btnAdd);
updateUI();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_menu, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_add_task:
final EditText taskEditText = new EditText(this);
AlertDialog dialog = new AlertDialog.Builder(this)
.setTitle("New Task")
.setMessage("Add a new task")
.setView(taskEditText)
.setPositiveButton("Add", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
String task = String.valueOf(taskEditText.getText());
SQLiteDatabase db = mHelper.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(Task.TaskEntry.COL_TASK_TITLE, task);
db.insertWithOnConflict(Task.TaskEntry.TABLE, null, values, SQLiteDatabase.CONFLICT_REPLACE);
db.close();
updateUI();
}
})
.setNegativeButton("Cancel", null)
.create();
dialog.show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void updateUI() {
ArrayList<String> taskList = new ArrayList<>();
SQLiteDatabase db = mHelper.getReadableDatabase();
Cursor cursor = db.query(Task.TaskEntry.TABLE,
new String[] {Task.TaskEntry._ID, Task.TaskEntry.COL_TASK_TITLE}, null, null, null, null, null);
while (cursor.moveToNext()) {
int index = cursor.getColumnIndex(Task.TaskEntry.COL_TASK_TITLE);
taskList.add(cursor.getString(index));
}
if (mAdapter == null) {
mAdapter = new ArrayAdapter<>(this, R.layout.item_todo, R.id.task_title, taskList);
mTaskListView.setAdapter(mAdapter);
} else {
mAdapter.clear();
mAdapter.addAll(taskList);
mAdapter.notifyDataSetChanged();
}
cursor.close();
db.close();
}
public void deleteTask(View view) {
View parent = (View) view.getParent();
TextView taskTextView = (TextView) parent.findViewById(R.id.task_title);
String task = String.valueOf(taskTextView.getText());
SQLiteDatabase db = mHelper.getWritableDatabase();
db.delete(Task.TaskEntry.TABLE, Task.TaskEntry.COL_TASK_TITLE + " = ?", new String[]{task});
db.close();
updateUI();
}
}
класс Task:
package com.kentforth.list5;
import android.provider.BaseColumns;
public class Task {
public static final String DB_NAME = "ToDoDB";
public static final int DB_VERSION = 1;
public class TaskEntry implements BaseColumns {
public static final String TABLE = "tasks";
public static final String COL_TASK_TITLE = "title";
}
}
класс TaskHelper:
package com.kentforth.list5;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class TaskHelper extends SQLiteOpenHelper{
public TaskHelper(Context context) {
super(context, Task.DB_NAME, null, Task.DB_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
String createTable = "CREATE TABLE " + Task.TaskEntry.TABLE + " ( " +
Task.TaskEntry._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
Task.TaskEntry.COL_TASK_TITLE + " TEXT NOT NULL);";
db.execSQL(createTable);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS" + Task.TaskEntry.TABLE);
onCreate(db);
}
}
