ListViewPopMenuDBAdapter_android

标签：open()   activity   ide   end   imp   override   r.java   cli   default   

public class MainActivity extends AppCompatActivity {
    EditText button_class = null;
    EditText button_name = null;
    EditText button_number = null;
    Button add = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button_class = (EditText) findViewById(R.id.input_class);
        button_name = (EditText) findViewById(R.id.input_name);
        button_number = (EditText) findViewById(R.id.input_number);
        add = (Button)findViewById(R.id.button);
        ListView listView = (ListView)findViewById(R.id.list);

        List<String> lists = new ArrayList<String>();
        final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, lists);
        listView.setAdapter(adapter);

        final DBAdapter dbAdapter = new DBAdapter(MainActivity.this);
        Log.i("dapter", "test1");
        dbAdapter.open();
        Log.i("dapter", "test2");
        Student[] students = dbAdapter.getAllData();
        for(int i=0; i<students.length; i++){
            lists.add(students[i].toString());
        }


        AdapterView.OnItemLongClickListener itemLongClickListener = new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, final View view, final int position, final long id) {
                PopupMenu popupMenu = new PopupMenu(MainActivity.this, view);
                MenuInflater inflater = popupMenu.getMenuInflater();
                inflater.inflate(R.menu.pop_menu, popupMenu.getMenu());
                popupMenu.show();

                popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                    @Override
                    public boolean onMenuItemClick(MenuItem item) {
                        switch (item.getItemId()){
                            case R.id.pop:
                                adapter.remove(adapter.getItem(position));
                                String[] strings = view.toString().split(" ");
                                long new_id = Long.parseLong(strings[0]);
                                dbAdapter.deleteOneData(new_id);
                                return true;
                            default:return false;
                        }
                    }
                });
                return true;
            }

        };
        listView.setOnItemLongClickListener(itemLongClickListener);

        add.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String stu_class = button_class.getText().toString();
                String stu_name = button_name.getText().toString();
                String stu_number = button_number.getText().toString();
                String info = stu_class+"   "+stu_name+"   "+stu_number;
                adapter.add(info);
                dbAdapter.insert(new Student(stu_number, stu_name, stu_class));
            }
        });

    }
}

/////////////////////////////////////////////////////////////////////////////////////////////

数据库适配器DBAdapter.java

public class MainActivity extends AppCompatActivity {

    EditText button_class = null;
    EditText button_name = null;
    EditText button_number = null;
    Button add = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button_class = (EditText) findViewById(R.id.input_class);
        button_name = (EditText) findViewById(R.id.input_name);
        button_number = (EditText) findViewById(R.id.input_number);
        add = (Button)findViewById(R.id.button);
        ListView listView = (ListView)findViewById(R.id.list);

        List<String> lists = new ArrayList<String>();
        final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, lists);
        listView.setAdapter(adapter);

        final DBAdapter dbAdapter = new DBAdapter(MainActivity.this);
        Log.i("dapter", "test1");
        dbAdapter.open();
        Log.i("dapter", "test2");
        Student[] students = dbAdapter.getAllData();
        for(int i=0; i<students.length; i++){
            lists.add(students[i].toString());
        }


        AdapterView.OnItemLongClickListener itemLongClickListener = new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, final View view, final int position, final long id) {
                PopupMenu popupMenu = new PopupMenu(MainActivity.this, view);
                MenuInflater inflater = popupMenu.getMenuInflater();
                inflater.inflate(R.menu.pop_menu, popupMenu.getMenu());
                popupMenu.show();

                popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
                    @Override
                    public boolean onMenuItemClick(MenuItem item) {
                        switch (item.getItemId()){
                            case R.id.pop:
                                adapter.remove(adapter.getItem(position));
                                String[] strings = view.toString().split(" ");
                                long new_id = Long.parseLong(strings[0]);
                                dbAdapter.deleteOneData(new_id);
                                return true;
                            default:return false;
                        }
                    }
                });
                return true;
            }

        };
        listView.setOnItemLongClickListener(itemLongClickListener);

        add.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String stu_class = button_class.getText().toString();
                String stu_name = button_name.getText().toString();
                String stu_number = button_number.getText().toString();
                String info = stu_class+"   "+stu_name+"   "+stu_number;
                adapter.add(info);
                dbAdapter.insert(new Student(stu_number, stu_name, stu_class));
            }
        });

    }
}
///////////////////////////////////////////////////////////////////////////////////////
布局文件activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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">
<LinearLayout android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
    <LinearLayout android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <TextView android:id="@+id/stu_class"
            android:layout_marginLeft="5dp"
            android:text="calss: "
            android:textSize="18dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <EditText android:id="@+id/input_class"
            android:textSize="18dp"
            android:layout_width="300dp"
            android:layout_height="wrap_content" />
    </LinearLayout>

    <LinearLayout android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <TextView android:id="@+id/stu_name"
            android:layout_marginLeft="5dp"
            android:text="name: "
            android:textSize="18dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <EditText android:id="@+id/input_name"
            android:textSize="18dp"
            android:layout_width="300dp"
            android:layout_height="wrap_content" />
    </LinearLayout>

    <LinearLayout android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <TextView android:id="@+id/stu_number"
            android:layout_marginLeft="5dp"
            android:text="number: "
            android:textSize="18dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <EditText android:id="@+id/input_number"
            android:textSize="18dp"
            android:layout_width="285dp"
            android:layout_height="wrap_content" />
    </LinearLayout>

    <Button
        android:id="@+id/button"
        android:layout_width="365dp"
        android:layout_height="55dp"
        android:text="add info"
        android:layout_marginLeft="10dp"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="24dp"
        android:text="class               name            number"
        />
    <ListView android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    </ListView>
</LinearLayout>

</android.support.constraint.ConstraintLayout>

ListViewPopMenuDBAdapter_android

标签：open()   activity   ide   end   imp   override   r.java   cli   default   

原文地址：https://www.cnblogs.com/lingYaoYao/p/9274504.html