添加android数据库插入代码后，该应用无法正常运行

Question

我正在制作一个简单的应用程序。该应用程序通过Edittext获取数据并将其插入数据库，然后将数据从数据库输出到textView。

public class MainActivity extends AppCompatActivity {

private TextView status;

public static final String TAG = "MainActivity";

private static String DATABASE_NAME = "20180720";
private static String TABLE_NAME = "dayList";
private static int DATABASE_VERSION = 1;
private DatabaseHelper dbHelper;
private SQLiteDatabase db;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    status = (TextView) findViewById(R.id.status);
    final EditText input01 = (EditText) findViewById(R.id.input01);
    final EditText input02 = (EditText) findViewById(R.id.input02);
    final EditText input03 = (EditText) findViewById(R.id.input03);

    Button queryBtn = (Button) findViewById(R.id.queryBtn);
    queryBtn.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            boolean isOpen = openDatabase();
            if (isOpen) {
                executeRawQuery();
                executeRawQueryParam2();
            }

        }
    });

    Button addBtn = (Button) findViewById(R.id.addBtn);
    addBtn.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            String name = input01.getText().toString();
            int age = Integer.parseInt(input02.getText().toString());
            String phone = input03.getText().toString();

            String sqlInsert = "insert into dayList (name, age, phone) values (" +
                    "'" + name + "', " + age + " ,'" + phone + "');";
            db.execSQL(sqlInsert);
        }
    });

}

private boolean openDatabase() {
    println("opening database [" + DATABASE_NAME + "].");

    dbHelper = new DatabaseHelper(this);
    db = dbHelper.getWritableDatabase();

    return true;
}

private void executeRawQuery() {
    println("\nexecuteRawQuery called.\n");

    Cursor c1 = db.rawQuery("select count(*) as Total from " + TABLE_NAME, null);
    println("cursor count : " + c1.getCount());

    c1.moveToNext();
    println("record count : " + c1.getInt(0));

    c1.close();

}

private void executeRawQueryParam() {
    println("\nexecuteRawQueryParam called.\n");

    String SQL = "select name, age, phone "
            + " from " + TABLE_NAME
            + " where age > ?";
    String[] args= {"30"};

    Cursor c1 = db.rawQuery(SQL, args);
    int recordCount = c1.getCount();
    println("cursor count : " + recordCount + "\n");

    for (int i = 0; i < recordCount; i++) {
        c1.moveToNext();
        String name = c1.getString(0);
        int age = c1.getInt(1);
        String phone = c1.getString(2);

        println("Record #" + i + " : " + name + ", " + age + ", " + phone);
    }

    c1.close();
}

private void executeRawQueryParam2() {
    println("\nexecuteRawQueryParam2 called.\n");

    String[] columns = {"name", "age", "phone"};
    Cursor c1 = db.query(TABLE_NAME, columns,
            null, null,
            null, null, null);

    int recordCount = c1.getCount();
    println("cursor count : " + recordCount + "\n");

    for (int i = 0; i < recordCount; i++) {
        c1.moveToNext();
        String name = c1.getString(0);
        int age = c1.getInt(1);
        String phone = c1.getString(2);

        println("Record #" + i + " : " + name + ", " + age + ", " + phone);
    }

    c1.close();

}

private void println(String msg) {
    Log.d(TAG, msg);
    status.append("\n" + msg);

}


private class DatabaseHelper extends SQLiteOpenHelper {
    public DatabaseHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    public void onCreate(SQLiteDatabase db) {
        println("creating table [" + TABLE_NAME + "].");

        try {
            String DROP_SQL = "drop table if exists " + TABLE_NAME;
            db.execSQL(DROP_SQL);
        } catch(Exception ex) {
            Log.e(TAG, "Exception in DROP_SQL", ex);
        }

        String CREATE_SQL = "create table " + TABLE_NAME + "("
                + " _id integer PRIMARY KEY autoincrement, "
                + " name text, "
                + " age integer, "
                + " phone text)";

        try {
            db.execSQL(CREATE_SQL);
        } catch(Exception ex) {
            Log.e(TAG, "Exception in CREATE_SQL", ex);
        }

        println("inserting records.");

        try {
            db.execSQL( "insert into " + TABLE_NAME + "(name, age, phone) values ('John', 20, '010-7788-1234');" );
            db.execSQL( "insert into " + TABLE_NAME + "(name, age, phone) values ('Mike', 35, '010-8888-1111');" );
            db.execSQL( "insert into " + TABLE_NAME + "(name, age, phone) values ('Sean', 26, '010-6677-4321');" );
        } catch(Exception ex) {
            Log.e(TAG, "Exception in insert SQL", ex);
        }

    }

    public void onOpen(SQLiteDatabase db) {
        println("opened database [" + DATABASE_NAME + "].");

    }

    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        Log.w(TAG, "Upgrading database from version " + oldVersion + " to " + newVersion + ".");

    }
}

}

当我按下queryBtn时，该应用程序正常运行，并将信息（已保存在数据库中）输出到textView。 但是当我按下addBtn按钮时，该应用已停止。 问题是什么？ 以及如何将Edittiext输入的信息插入数据库？